We present midrapidity charged-pion invariant cross sections, the ratio of the pi(-) to pi(+) cross sections and the charge-separated double-spin asymmetries in polarized p + p collisions at root s = p + 200 GeV. While the cross section measurements are consistent within the errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the chargedpion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. The charge-separated pion asymmetries presented here sample an x range of similar to 0.03-0.16 and provide unique information on the sign of the gluon-helicity distribution. Disciplines Elementary Particles and Fields and String Theory | Physics Comments This is an article from Physical Review D 91 (2015): 032001, doi:10.1103/PhysRevD.91.032001. Posted with permission. Authors Andrew Adare, Alan Dion, John C. Hill, Todd Kempel, John G. Lajoie, Alexandre Lebedev, Craig Ogilvie, H. Pei, Marzia Rosati, C. L. Silva, Feng Wei, et al., and PHENIX Collaboration This article is available at Iowa State University Digital Repository: http://lib.dr.iastate.edu/physastro_pubs/232 Charged-pion cross sections and double-helicity asymmetries in polarized pþ p collisions at ffiffi s p 1⁄4 200 GeV A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta’ani, J. Alexander, K. R. Andrews, A. Angerami, K. Aoki, N. Apadula, E. Appelt, Y. Aramaki, R. Armendariz, E. C. Aschenauer, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, B. Bannier, K. N. Barish, B. Bassalleck, A. T. Basye, S. Bathe, V. Baublis, C. Baumann, A. Bazilevsky, R. Belmont, J. Ben-Benjamin, R. Bennett, D. S. Blau, J. S. Bok, K. Boyle, M. L. Brooks, D. Broxmeyer, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, S. Campbell, P. Castera, C.-H. Chen, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa del Valle, M. Connors, M. Csanád, T. Csörgő, S. Dairaku, A. Datta, G. David, M. K. Dayananda, A. Denisov, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, A. Dion, M. Donadelli, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, L. D’Orazio, Y. V. Efremenko, T. Engelmore, A. Enokizono, H. En’yo, S. Esumi, B. Fadem, D. E. Fields, M. Finger, M. Finger, Jr., F. Fleuret, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, T. Fusayasu, C. Gal, I. Garishvili, F. Giordano, A. Glenn, X. Gong, M. Gonin, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, L. Guo, H.-Å. Gustafsson, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, R. Han, J. Hanks, C. Harper, K. Hashimoto, E. Haslum, R. Hayano, X. He, T. K. Hemmick, T. Hester, J. C. Hill, R. S. Hollis, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, Y. Hori, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, M. Inaba, A. Iordanova, D. Isenhower, M. Ishihara, M. Issah, D. Ivanischev, Y. Iwanaga, B. V. Jacak, J. Jia, X. Jiang, D. John, B. M. Johnson, T. Jones, K. S. Joo, D. Jouan, J. Kamin, S. Kaneti, B. H. Kang, J. H. Kang, J. S. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, B. I. Kim, D. J. Kim, E.-J. Kim, Y.-J. Kim, Y. K. Kim, E. Kinney, Á. Kiss, E. Kistenev, D. Kleinjan, P. Kline, L. Kochenda, B. Komkov, M. Konno, J. Koster, D. Kotov, A. Král, G. J. Kunde, K. Kurita, M. Kurosawa, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, A. Lebedev, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, S. H. Lee, S. R. Lee, M. J. Leitch, M. A. L. Leite, X. Li, S. H. Lim, L. A. Linden Levy, H. Liu, M. X. Liu, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Manion, V. I. Manko, E. Mannel, Y. Mao, H. Masui, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, N. Means, M. Mendoza, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, K. Miki, A. Milov, J. T. Mitchell, Y. Miyachi, A. K. Mohanty, H. J. Moon, Y. Morino, A. Morreale, D. P. Morrison, S. Motschwiller, T. V. Moukhanova, T. Murakami, J. Murata, S. Nagamiya, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, J. Newby, M. Nguyen, M. Nihashi, R. Nouicer, A. S. Nyanin, C. Oakley, E. O’Brien, C. A. Ogilvie, M. Oka, K. Okada, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, B. H. Park, I. H. Park, S. K. Park, S. F. Pate, L. Patel, H. Pei, J.-C. Peng, H. Pereira, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, H. Qu, J. Rak, I. Ravinovich, K. F. Read, K. Reygers, V. Riabov, Y. Riabov, E. Richardson, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, S. S. E. Rosendahl, J. G. Rubin, B. Sahlmueller, N. Saito, T. Sakaguchi, V. Samsonov, S. Sano, M. Sarsour, T. Sato, M. Savastio, S. Sawada, K. Sedgwick, R. Seidl, R. Seto, D. Sharma, I. Shein, T.-A. Shibata, K. Shigaki, H. H. Shim, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, T. Sodre, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, P. W. Stankus, E. Stenlund, S. P. Stoll, T. Sugitate, A. Sukhanov, J. Sun, J. Sziklai, E. M. Takagui, A. Takahara, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, E. Tennant, H. Themann, D. Thomas, M. Togawa, L. Tomášek, M. Tomášek, H. Torii, R. S. Towell, I. Tserruya, Y. Tsuchimoto, K. Utsunomiya, C. Vale, H.W. van Hecke, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, M. Virius, A. Vossen, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, R. Wei, J. Wessels, S. N. White, D. Winter, C. L. Woody, R. M. Wright, M. Wysocki, Y. L. Yamaguchi, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, J. S. Yoo, Z. You, G. R. Young, I. Younus, I. E. Yushmanov, W. A. Zajc, A. Zelenski, and S. Zhou (PHENIX Collaboration) Abilene Christian University, Abilene, Texas 79699, USA Department of Physics, Augustana College, Sioux Falls, South Dakota 57197, USA Department of Physics, Banaras Hindu University, Varanasi 221005, India PHYSICAL REVIEW D 91, 032001 (2015) 1550-7998=2015=91(3)=032001(13) 032001-1 © 2015 American Physical Society Bhabha Atomic Research Centre, Bombay 400 085, India Baruch College, City University of New York, New York, New York 10010, USA Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA University of California Riverside, Riverside, California 92521, USA Charles University, Ovocný trh 5, Praha 1, 116 36 Prague, Czech Republic Chonbuk National University, Jeonju 561-756, Korea Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing 102413, People’s Republic of China Center for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan University of Colorado, Boulder, Colorado 80309, USA Columbia University, New York, New York 10027, USA and Nevis Laboratories, Irvington, New York 10533, USA Czech Technical University, Zikova 4, 166 36 Prague 6, Czech Republic Dapnia, CEA Saclay, F-91191 Gif-sur-Yvette, France ELTE, Eötvös Loránd University, Pázmany Péter sétány 1/A, H-1117 Budapest, Hungary Ewha Womans University, Seoul 120-750, Korea Florida State University, Tallahassee, Florida 32306, USA Georgia State University, Atlanta, Georgia 30303, USA Hanyang University, Seoul 133-792, Korea Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan IHEP Protvino, State Research Center of Russian Federation, Institute for High Energy Physics, Protvino 142281, Russia University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA Institute for Nuclear Research of the Russian Academy of Sciences, prospekt 60-letiya Oktyabrya 7a, Moscow 117312, Russia Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic Iowa State University, Ames, Iowa 50011, USA Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan Helsinki Institute of Physics and University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan Korea University, Seoul 136-701, Korea Russian Research Center “Kurchatov Institute”, Moscow 123098, Russia Kyoto University, Kyoto 606-8502, Japan Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128 Palaiseau, France Physics Department, Lahore University of Management Sciences, Lahore 54792, Pakistan Lawrence Livermore National Laboratory, Livermore, California 94550, USA Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA LPC, Université Blaise Pascal, CNRS-IN2P3, Clermont-Fd, 63177 Aubiere Cedex, France Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden University of Maryland, College Park, Maryland 20742, USA Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-9337, USA Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA Institut fur Kernphysik, University of Muenster, D-48149 Muenster, Germany Muhlenberg College, Allentown, Pennsylvania 18104-5586, USA Myongji University, Yongin, Kyonggido 449-728, Korea Nagasaki Institute of Applied Science, Nagasaki-shi, Nagasaki 851-0193, Japan National Research Nuclear University, MEPhI, Moscow Engineering Physics Institute, Moscow 115409, Russia University of New Mexico, Albuquerque, New Mexico 87131, USA New Mexico State University,

A. Adare,14 S. Afanasiev,32 C. Aidala,41,45,46 N. N. Ajitanand,65 Y. Akiba,59,60 R. Akimoto,13 H. Al-Bataineh,53 H. Al-Ta’ani,53 J. Alexander,65 A. Angerami,15 K. Aoki,37,59 N. Apadula,66 L. Aphecetche,67 Y. Aramaki,13,59 J. Asai,59 H. Asano,37,59 E. C. Aschenauer,8 E. T. Atomssa,38,66 R. Averbeck,66 T. C. Awes,55 B. Azmoun,8 V. Babintsev,26 M. Bai,7 G. Baksay,21 L. Baksay,21 A. Baldisseri,17 B. Bannier,66 K. N. Barish,9 P. D. Barnes,41,* B. Bassalleck,52 A. T. Basye,1 S. Bathe,6,9,60 S. Batsouli,55 V. Baublis,58 C. Baumann,47 S. Baumgart,59 A. Bazilevsky,8 S. Belikov,8,* R. Belmont,71 R. Bennett,66 A. Berdnikov,62 Y. Berdnikov,62 A. A. Bickley,14 X. Bing,54 D. S. Blau,36 J. G. Boissevain,41 J. S. Bok,53 H. Borel,17 K. Boyle,60,66 M. L. Brooks,41 H. Buesching,8 V. Bumazhnov,26 G. Bunce,8,60 S. Butsyk,41,52 C. M. Camacho,41 S. Campbell,66 P. Castera,66 B. S. Chang,75 W. C. Chang,2 J.-L. Charvet,17 C.-H. Chen,66 S. Chernichenko,26 C. Y. Chi,15 M. Chiu,8,27 I. J. Choi,27,75 J. B. Choi,11 S. Choi,64 R. K. Choudhury,5 P. Christiansen,43 T. Chujo,70 P. Chung,65 A. Churyn,26 O. Chvala,9 V. Cianciolo,55 Z. Citron,66 B. A. Cole,15 M. Connors,66 P. Constantin,41 M. Csanád,19 T. Csörgő,74 T. Dahms,66 S. Dairaku,37,59 K. Das,22 A. Datta,45 M. S. Daugherity,1 G. David,8 A. Denisov,26 D. d’Enterria,38 A. Deshpande,60,66 E. J. Desmond,8 K. V. Dharmawardane,53 O. Dietzsch,63 L. Ding,30 A. Dion,30,66 M. Donadelli,63 O. Drapier,38 A. Drees,66 K. A. Drees,7 A. K. Dubey,73 J. M. Durham,41,66 A. Durum,26 D. Dutta,5 V. Dzhordzhadze,9 L. D’Orazio,44 S. Edwards,7 Y. V. Efremenko,55 F. Ellinghaus,14 T. Engelmore,15 A. Enokizono,40,55 H. En’yo,59,60 S. Esumi,70 K. O. Eyser,9 B. Fadem,48 D. E. Fields,52,60 M. Finger,10 M. Finger Jr.,10 F. Fleuret,38 S. L. Fokin,36 Z. Fraenkel,73,* J. E. Frantz,54,66 A. Franz,8 A. D. Frawley,22 K. Fujiwara,59 Y. Fukao,37,59 T. Fusayasu,50 K. Gainey,1 C. Gal,66 A. Garishvili,68 I. Garishvili,40,68 A. Glenn,14,40 H. Gong,66 X. Gong,65 M. Gonin,38 J. Gosset,17 Y. Goto,59,60 R. Granier de Cassagnac,38 N. Grau,3,15 S. V. Greene,71 M. Grosse Perdekamp,27,60 T. Gunji,13 L. Guo,41 H.-Å. Gustafsson,43,* T. Hachiya,59 A. Hadj Henni,67 J. S. Haggerty,8 K. I. Hahn,20 H. Hamagaki,13 R. Han,57 J. Hanks,15 E. P. Hartouni,40 K. Haruna,25 K. Hashimoto,59,61 E. Haslum,43 R. Hayano,13 X. He,23 M. Heffner,40 T. K. Hemmick,66 T. Hester,9 J. C. Hill,30 M. Hohlmann,21 R. S. Hollis,9 W. Holzmann,65 K. Homma,25 B. Hong,35 T. Horaguchi,13,59,69,70 Y. Hori,13 D. Hornback,68 S. Huang,71 T. Ichihara,59,60 R. Ichimiya,59 H. Iinuma,34,37,59 Y. Ikeda,59,70 K. Imai,31,37,59 J. Imrek,18 M. Inaba,70 A. Iordanova,9 D. Isenhower,1 M. Ishihara,59 T. Isobe,13,59 M. Issah,65,71 A. Isupov,32 D. Ivanischev,58 D. Ivanishchev,58 B. V. Jacak,66 M. Javani,23 J. Jia,8,15,65 X. Jiang,41 J. Jin,15 B. M. Johnson,8 K. S. Joo,49 D. Jouan,56 D. S. Jumper,27 F. Kajihara,13 S. Kametani,59 N. Kamihara,60 J. Kamin,66 S. Kaneti,66 B. H. Kang,24 J. H. Kang,75 J. S. Kang,24 J. 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Shibata,59,69 K. Shigaki,25 M. Shimomura,70 K. Shoji,37,59 P. Shukla,5 A. Sickles,8 C. L. Silva,30,63 D. Silvermyr,55 C. Silvestre,17 K. S. Sim,35 B. K. Singh,4 C. P. Singh,4 V. Singh,4 M. Slunečka,10 A. Soldatov,26 R. A. Soltz,40 W. E. Sondheim,41 S. P. Sorensen,68 M. Soumya,65 I. V. Sourikova,8 F. Staley,17 P. W. Stankus,55 E. Stenlund,43 M. Stepanov,45,53 A. Ster,74 S. P. Stoll,8 T. Sugitate,25 C. Suire,56 A. Sukhanov,8 J. Sun,66 J. Sziklai,74 E. M. Takagui,63 A. Takahara,13 A. Taketani,59,60 R. Tanabe,70 Y. Tanaka,50 S. Taneja,66 K. Tanida,59,60,64 M. J. Tannenbaum,8 S. Tarafdar,4 A. Taranenko,51,65 P. Tarján,18 E. Tennant,53 H. Themann,66 T. L. Thomas,52 T. Todoroki,59,70 M. Togawa,37,59 A. Toia,66 L. Tomášek,29 M. Tomášek,16,29 Y. Tomita,70 H. Torii,25,59 R. S. Towell,1 V-N. Tram,38 I. Tserruya,73 Y. Tsuchimoto,13,25 T. Tsuji,13 C. Vale,8,30 H. Valle,71

We report a measurement of e + e − pairs from semileptonic heavy-flavor decays in d + Au collisions at √ s NN = 200 GeV. By exploring the mass and transverse-momentum dependence of the yield, the bottom decay contribution can be isolated from charm, and quantified by comparison to PYTHIA and MC @ NLO simulations. The resulting b ¯ b -production cross section is σ d Au b ¯ b = 1 . 37 ± 0 . 28 (stat) ± 0 . 46 (syst) mb, which is equivalent to a nucleon-nucleon cross section of σ NNbb = 3 . 4 ± 0 . 8 (stat) ± 1 . 1 (syst) μ b.

The PHENIX experiment has measured open heavy-flavor production via semileptonic decay over the transverse momentum range 1 < p T < 6 GeV =c at forward and backward rapidity ( 1 . 4 < j y j < 2 . 0 ) in d þ Au and p þ p collisions at ffiffiffiffiffiffiffiffi s NN p ¼ 200 GeV. In central d þ Au collisions, relative to the yield in p þ p collisions scaled by the number of binary nucleon-nucleon collisions, a suppression is observed at forward rapidity (in the d -going direction) and an enhancement at backward rapidity (in the Au-going direction). Predictions using nuclear-modified-parton-distribution functions, even with additional nuclear-p T broadening, cannot simultaneously reproduce the data at both rapidity ranges, which implies that these models are incomplete and suggests the possible importance of final-state interactions in the asymmetric d þ Au collision system. These results can be used to probe cold-nuclear-matter effects, which may significantly affect heavy-quark production, in addition to helping constrain the magnitude of charmonia-breakup effects in nuclear matter

We present a measurement of the cross section and transverse single-spin asymmetry (AN) for. mesons at large pseudorapidity from root s = 200 GeV p up arrow + p collisions. The measured cross section for 0.5 < p(T) < 5.0 GeV/c and 3.0 < vertical bar eta vertical bar < 3.8 is well described by a next-to-leading-order perturbative-quantum-chromodynamics calculation. The asymmetries A(N) have been measured as a function of Feynman-x (x(F)) from 0.2 < vertical bar x(F)vertical bar < 0.7, as well as transverse momentum (p(T)) from 1.0 < p(T) < 4.5 GeV/c. The asymmetry averaged over positive x(F) is < A(N)> = 0.061 +/- 0.014. The results are consistent with prior transverse single-spin measurements of forward eta and pi(0) mesons at various energies in overlapping x(F) ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p up arrow + p collisions.

Adare, A.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Al-Bataineh, H.; Alexander, J.; Angerami, A.; Aoki, K.; Apadula, N.; Aramaki, Y.; Atomssa, E. T.; Averbeck, R.; Awes, T. C.; Azmoun, B.; Babintsev, V.; Bai, M.; Baksay, G.; Baksay, L.; Barish, K. N.; Bassalleck, B.; Basye, A. T.; Bathe, S.; Baublis, V.; Baumann, C.; Bazilevsky, A.; Belikov, S.; Belmont, R.; Bennett, R.; Bhom, J. H.; Blau, D. S.; Bok, J. S.; Boyle, K.; Brooks, M. L.; Buesching, H.; Bumazhnov, V.; Bunce, G.; Butsyk, S.; Campbell, S.; Caringi, A.; Chen, C-H; Chi, C. Y.; Chiu, M.; Choi, I. J.; Choi, J. B.; Choudhury, R. K.; Christiansen, Peter; Chujo, T.; Chung, P.; Chvala, O.; Cianciolo, V.

A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, K. Aoki, L. Aphecetche, R. Armendariz, S. H. Aronson, J. Asai, E. T. Atomssa, R. Averbeck, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, A. T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov,* R. Bennett, A. Berdnikov, Y. Berdnikov, A.A. Bickley, J. G. Boissevain, H. Borel, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C.M. Camacho, S. Campbell, B. S. Chang, W.C. Chang, J.-L. Charvet, S. Chernichenko, J. Chiba, C.Y. Chi, M. Chiu, I. J. Choi, R. K. Choudhury, T. Chujo, P. Chung, A. Churyn, V. Cianciolo, Z. Citron, C. R. Cleven, B. A. Cole, M. P. Comets, P. Constantin, M. Csanád, T. Csörgő, T. Dahms, S. Dairaku, K. Das, G. David, M. B. Deaton, K. Dehmelt, H. Delagrange, A. Denisov, D. d’Enterria, A. Deshpande, E. J. Desmond, O. Dietzsch, A. Dion, M. Donadelli, O. Drapier, A. Drees, K. A. Drees, A.K. Dubey, A. Durum, D. Dutta, V. Dzhordzhadze, Y. V. Efremenko, J. Egdemir, F. Ellinghaus, W. S. Emam, T. Engelmore, A. Enokizono, H. En’yo, S. Esumi, K.O. Eyser, B. Fadem, D. E. Fields, M. Finger, Jr., M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel,* J. E. Frantz, A. Franz, A.D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, S. Gadrat, I. Garishvili, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, H.-Å. Gustafsson,* T. Hachiya, A. Hadj Henni, C. Haegemann, J. S. Haggerty, H. Hamagaki, R. Han, H. Harada, E. P. Hartouni, K. Haruna, E. Haslum, R. Hayano, M. Heffner, T. K. Hemmick, T. Hester, X. He, H. Hiejima, J. C. Hill, R. Hobbs, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, Y. Inoue, D. Isenhower, L. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, B. V. Jacak, J. Jia, J. Jin, O. Jinnouchi, B.M. Johnson, K. S. Joo, D. Jouan, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, M. Kaneta, J. H. Kang, H. Kanou, J. Kapustinsky, D. Kawall, A.V. Kazantsev, T. Kempel, A. Khanzadeev, K.M. Kijima, J. Kikuchi, B. I. Kim, D.H. Kim, D. J. Kim, E. Kim, S. H. Kim, E. Kinney, K. Kiriluk, Á. Kiss, E. Kistenev, A. Kiyomichi, J. Klay, C. Klein-Boesing, L. Kochenda, V. Kochetkov, B. Komkov, M. Konno, J. Koster, D. Kotchetkov, A. Kozlov, A. Král, A. Kravitz, J. Kubart, G. J. Kunde, N. Kurihara, K. Kurita, M. Kurosawa, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, D. Layton, A. Lebedev, D.M. Lee, K. B. Lee, M.K. Lee, T. Lee, M. J. Leitch, M.A. L. Leite, B. Lenzi, P. Liebing, T. Liška, A. Litvinenko, H. Liu, M.X. Liu, X. Li, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M.D. Malik, V. I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. McCumber, P. L. McGaughey, N. Means, B. Meredith, Y. Miake, P. Mikeš, K. Miki, T. E. Miller, A. Milov, S. Mioduszewski, M. Mishra, J. T. Mitchell, M. Mitrovski, A. K. Mohanty, Y. Morino, A. Morreale, D. P. Morrison, T. V. Moukhanova, D. Mukhopadhyay, J. Murata, S. Nagamiya, Y. Nagata, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, T. Nakamura, K. Nakano, J. Newby, M. Nguyen, T. Niita, B. E. Norman, R. Nouicer, A. S. Nyanin, E. O’Brien, S. X. Oda, C. A. Ogilvie, H. Ohnishi, K. Okada, M. Oka, O.O. Omiwade, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, D. Pal, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, W. J. Park, S. F. Pate, H. Pei, J.-C. Peng, H. Pereira, V. Peresedov, D.Yu. Peressounko, C. Pinkenburg, M. L. Purschke, A.K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, D. Roach, G. Roche, S. D. Rolnick, A. Romana,* M. Rosati, S. S. E. Rosendahl, P. Rosnet, P. Rukoyatkin, P. Ružička, V. L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, H. Sakata, V. Samsonov, S. Sato, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A.Yu. Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, A. Shevel, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, S. Skutnik, M. Slunečka, A. Soldatov, R.A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P.W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, A. Sukhanov, J. Sziklai, T. Tabaru, S. Takagi, E.M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, A. Taranenko, P. Tarján, H. Themann, PHYSICAL REVIEW D 83, 032001 (2011)

K. Ackerstaff6, A. Airapetian36, N. Akopov36, I. Akushevich7, M. Amarian26,31,36, E.C. Aschenauer7,14,26, H. Avakian11, R. Avakian36, A. Avetissian36, B. Bains16, S. Barrow28, C. Baumgarten24, M. Beckmann13, S. Belostotski29, J.E. Belz32,33, Th. Benisch9, S. Bernreuther9, N. Bianchi11, S. Blanchard25, J. Blouw26, H. Böttcher7, A. Borissov6,15, J. Brack5, B. Bray4, S. Brauksiepe13, B. Braun9,24, St. Brons7, W. Brückner15, A. Brüll15, E.E.W. Bruins21, H.J. Bulten19,26,35, R.V. Cadman16, G.P. Capitani11, P. Carter4, P. Chumney25, E. Cisbani31, G.R. Court18, P. F. Dalpiaz10, R. De Leo3, P.P.J. Delheij33, E. De Sanctis11, D. De Schepper2,21, E. Devitsin23, P.K.A. de Witt Huberts26, P. Di Nezza11, M. Düren9, A. Dvoredsky4, J. Ely5, G. Elbakian36, J. Emerson, A. Fantoni, A. Fechtchenko, M. Ferstl, D. Fick, K. Fiedler, B.W. Filippone, H. Fischer, H.T. Fortune28, B. Fox5, S. Frabetti10, J. Franz13, S. Frullani31, M.-A. Funk6, N.D. Gagunashvili8, P. Galumian1, H. Gao2,16,21, Y. Gärber7, F. Garibaldi31, G. Gavrilov29, P. Geiger15, V. Gharibyan36, A. Golendukhin6,20,24,36, G. Graw24, O. Grebeniouk29, P.W. Green1,33, L.G. Greeniaus1,33, C. Grosshauser9, M. Guidal26, A. Gute9, V. Gyurjyan11, J.P. Haas25, W. Haeberli19, J.-O. Hansen2, D. Hasch7, O. Häusser†32,33, R. Henderson33, F.H. Heinsius13, Th. Henkes26, M. Henoch9, R. Hertenberger24, Y. Holler6, R.J. Holt16, W. Hoprich15, H. Ihssen6,26, M. Iodice31, A. Izotov29, H.E. Jackson2, A. Jgoun29, C. Jones2, R. Kaiser7,32,33, M. Kestel13, E. Kinney5, M. Kirsch9, A. Kisselev29, P. Kitching1, H. Kobayashi34, N. Koch20, K. Königsmann13, M. Kolstein26, H. Kolster24, V. Korotkov, W. Korsch, V. Kozlov, L.H. Kramer, B. Krause, V.G. Krivokhijine, M. Kückes, F. Kümmell13, M. Kurisuno34, G. Kyle25, W. Lachnit9, W. Lorenzon22,28, A. Lung4, N.C.R. Makins2,16, F.K. Martens1, J.W. Martin21, H. Marukyan36, F. Masoli10, A. Mateos21, M. Maul30, M. McAndrew18, K. McIlhany4,21, R.D. McKeown4, F. Meissner7, F. Menden13,33, D. Mercer5, A. Metz24, N. Meyners6 O. Mikloukho29, C.A. Miller1,33, M.A. Miller16, R. Milner21, V. Mitsyn8, A. Most16,22,28, R. Mozzetti11, V. Muccifora11, A. Nagaitsev8, E. Nappi3, Yu. Naryshkin29, A.M. Nathan16, F. Neunreither9, J.M. Niczyporuk16,21, W.-D. Nowak7, M. Nupieri11, P. Oelwein15, H. Ogami34, T.G. O’Neill2, R. Openshaw33, B.R. Owen16, J. Ouyang33, V. Papavassiliou25, S.F. Pate21,25, M. Pitt4, H.R. Poolman26, S. Potashov23, D.H. Potterveld2, G. Rakness5, A. Reali, R. Redwine, A.R. Reolon, R. Ristinen, K. Rith, G. Röper, P. Rossi, S. Rudnitsky, M. Ruh13, D. Ryckbosch14, Y. Sakemi34, I. Savin8, C. Scarlett22, A. Schäfer30, F. Schmidt9, H. Schmitt13, G. Schnell25, K.P. Schüler6, A. Schwind7, J. Seibert13, T.-A. Shibata34, K. Shibatani34, T. Shin21, V. Shutov8, C. Simani10, A. Simon13,25, K. Sinram6, P. Slavich10,11, W.R. Smythe5, J. Sowinski15, M. Spengos6,28, E. Steffens9, J. Stenger9, J. Stewart18, F. Stock9,15, U. Stoesslein7, M. Sutter21, H. Tallini18, S. Taroian36, A. Terkulov23, D.M. Thiessen32,33, B. Tipton21, E. Thomas11, A. Trudel33, M. Tytgat14, G.M. Urciuoli31, J.J. van Hunen26, R. van de Vyver14, J.F.J. van den Brand26,35, G. van der Steenhoven26, M.C. Vetterli32,33, V. Vikhrov29, M. Vincter33, J. Visser26, E. Volk15, W. Wander9,21, T.P. Welch27, J. Wendland32,33, S.E. Williamson16, T. Wise19, K. Woller6, S. Yoneyama, K. Zapfe, H. Zohrabian, R. Zurmühle Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70124 Bari, Italy W.K. Kellogg Radiation Lab, California Institute of Technology, Pasadena, California 91125, USA Nuclear Physics Laboratory, University of Colorado, Boulder, Colorado 80309-0446, USA DESY, Deutsches Elektronen Synchrotron, 22603 Hamburg, Germany DESY Zeuthen, 15738 Zeuthen, Germany Joint Institute for Nuclear Research, 141980 Dubna, Russia Physikalisches Institut, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara and Dipartimento di Fisica, Università di Ferrara, 44100 Ferrara,

We report the measurement of the transverse momentum dependence of inclusive J/psi polarization in p + p collisions at root s = 200 GeV performed by the PHENIX Experiment at the Relativistic Heavy Ion Collider. The J/psi polarization is studied in the helicity, Gottfried-Jackson, and Collins-Soper frames for p(T) < 5 GeV/c and vertical bar y vertical bar < 0.35. The polarization in the helicity and Gottfried-Jackson frames is consistent with zero for all transverse momenta, with a slight (1.8 sigma) trend towards longitudinal polarization for transverse momenta above 2 GeV/c. No conclusion is allowed due to the limited acceptance in the Collins-Soper frame and the uncertainties of the current data. The results are compared to observations for other collision systems and center of mass energies and to different quarkonia production models.

We extend the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering On Glass) to address a variety of issues including precision QCD measurements, extraction of structure functions, and the derived Parton Distribution Functions (PDF's). This experiment uses a Tevatron-based neutrino beam to obtain a sample of Deep Inelastic Scattering (DIS) events which is over two orders of magnitude larger than past samples. We outline an innovative method for fitting the structure functions using a parametrized energy shift which yields reduced systematic uncertainties. High statistics measurements, in combination with improved systematics, will enable NuSOnG to perform discerning tests of fundamental Standard Model parameters as we search for deviations which may hint of "Beyond the Standard Model" physics.

We propose a 3500 ton (3000 ton fiducial volume) SiO_2 neutrino detector with sampling calorimetry, charged particle tracking, and muon spectrometers to run in a Tevatron Fixed Target Program. Improvements to the Fermilab accelerator complex should allow substantial increases in the neutrino flux over the previous NuTeV quad triplet beamline. With 4E19 protons on target/year, a 5 year run would achieve event statistics more than 100 times higher than NuTeV. With 100 times the statistics of previous high energy neutrino experiments, the purely weak processes [\nu_{\mu} e^- \to \nu_{\mu}+ e^-] and [\nu_{\mu} e^- \to \nu_e + \mu^-] (inverse muon decay) can be measured with high accuracy for the first time. The inverse muon decay process is independent of strong interaction effects and can be used to significantly improve the flux normalization for all other processes. The high neutrino and antineutrino fluxes also make new searches for lepton flavor violation and neutral heavy leptons possible. In this document, we give a first look at the physics opportunities, detector and beam design, and calibration procedures.

All of the experimental data points presented in the original paper are correct and unchanged (including statistical and systematic uncertainties). However, herein we correct a comparison between the experimental data and a theoretical picture, because we discovered a mistake in the code used. All of the most probable sigma_breakup values differ by less than 0.4 mb from those originally presented. However, the one standard deviation uncertainties (that include contributions from both the statistical and systematic uncertainties on the experimental data points) are approximately 30-60% larger than originally reported. We give a table of the new comparison results and corrected versions of Figs. 8-11 of the original paper and we note that no correction is needed for results from the data-driven method in Fig. 13.

This paper presents the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering on Glass). This experiment uses a Tevatron-based neutrino beam to obtain over an order of magnitude higher statistics than presently available for the purely weak processes νμ + e- → νμ + e- and νμ + e- → νe + μ-. A sample of Deep Inelastic Scattering events which is over two orders of magnitude larger than past samples will also be obtained. As a result, NuSOnG will be unique among present and planned experiments for its ability to probe neutrino couplings to Beyond the Standard Model physics. Many Beyond Standard Model theories physics predict a rich hierarchy of TeV-scale new states that can correct neutrino cross-sections, through modifications of Zνν couplings, tree-level exchanges of new particles such as Z′'s, or through loop-level oblique corrections to gauge boson propagators. These corrections are generic in theories of extra dimensions, extended gauge symmetries, supersymmetry, and more. The sensitivity of NuSOnG to this new physics extends beyond 5 TeV mass scales. This paper reviews these physics opportunities.

Yields for J/psi production in Cu+Cu collisions at root s(NN) = 200 GeV have been measured over the rapidity range |y|< 2.2 and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data offer greatly improved precision over existing Au+Au data for J/psi production in collisions with small to intermediate numbers of participants, in the range where the quark-gluon plasma transition threshold is predicted to lie. Cold nuclear matter estimates based on ad hoc fits to d+Au data describe the Cu+Cu data up to N-part similar to 50, corresponding to a Bjorken energy density of at least 1.5 GeV/fm(3).

K. Ackerstaff, A. Airapetian, I. Akushevich, N. Akopov, M. Amarian, E.C. Aschenauer, R. Avakian, H. Avakian, A. Avetissian, B. Bains, S. Barrow, M. Beckmann, S. Belostotski, J.E. Belz, Th. Benisch, S. Bernreuther, N. Bianchi, S. Blanchard, J. Blouw, H. Böttcher, A. Borissov, J. Brack, B. Braun, B. Bray, W. Brückner, A. Brüll, E.E.W. Bruins, H.J. Bulten, G.P. Capitani, P. Carter, E. Cisbani, G.R. Court, P.P.J. Delheij, E. Devitsin, C.W. de Jager, E. De Sanctis, D. De Schepper, P.K.A. de Witt Huberts, M. Düren, A. Dvoredsky, G. Elbakian, J. Emerson, A. Fantoni, A. Fechtchenko, M. Ferstl, D. Fick, K. Fiedler, B.W. Filippone, H. Fischer, H.T. Fortune, J. Franz, S. Frullani, M.-A. Funk, N.D. Gagunashvili, P. Galumian, H. Gao, Y. Gärber, F. Garibaldi, P. Geiger, V. Gharibyan, A. Golendoukhin, G. Graw, O. Grebeniouk, P.W. Green, L.G. Greeniaus, C. Grosshauser, A. Gute, V. Gyurjyan, J.P. Haas, W. Haeberli, J.-O. Hansen, D. Hasch, O. Häusser, R.S. Henderson, Th. Henkes, R. Hertenberger, Y. Holler, R.J. Holt, H. Ihssen, M. Iodice, A. Izotov, H.E. Jackson, A. Jgoun, C. Jones, R. Kaiser, E. Kinney, M. Kirsch, A. Kisselev, P. Kitching, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, W. Korsch, V. Kozlov, L.H. Kramer, B. Krause, V.G. Krivokhijine, M. Kückes, G. Kyle, W. Lachnit, W. Lorenzon, A. Lung, N.C.R. Makins, S.I. Manaenkov, F.K. Martens, J.W. Martin, A. Mateos, K. McIlhany, R.D. McKeown, F. Meissner, D. Mercer, A. Metz, N. Meyners, O.Mikloukho, C.A. Miller, M.A. Miller, R.G. Milner, V. Mitsyn, A. Most, R. Mozzetti, V. Muccifora, A. Nagaitsev, Y. Naryshkin, A.M. Nathan, F. Neunreither M. Niczyporuk, W.-D. Nowak, M. Nupieri, P. Oelwein, H. Ogami, T.G. O’Neill, R. Openshaw, V. Papavassiliou, S.F. Pate, M. Pitt, S. Potashov, D.H. Potterveld, B. Povh, G. Rakness, R. Redwine, A.R. Reolon, R. Ristinen, K. Rith, G. Röper, H. Roloff, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, K.P. Schüler, A. Schwind, T.-A. Shibata, T. Shin, A. Simon, K. Sinram, W.R. Smythe, J. Sowinski, M. Spengos, E. Steffens, J. Stenger, J. Stewart, F. Stock, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, D.M. Thiessen, B. Tipton, A. Trudel, M. Tytgat, G.M. Urciuoli, R. Van de Vyver, J.F.J. van den Brand, G. van der Steenhoven, M.C. Vetterli, E. Volk, W. Wander, T.P. Welch, S.E. Williamson, T. Wise, T. Wölfel, K. Zapfe-Düren, H. Zohrabian, R. Zurmühle

S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S.H. Aronson, R. Averbeck, T.C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K.N. Barish, P.D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J.G. Boissevain, H. Borel, S. Borenstein, M.L. Brooks, D.S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J.M. Burward-Hoy, S. Butsyk, X. Camard, J.-S. Chai, P. Chand, W.C. Chang, S. Chernichenko, C.Y. Chi, J. Chiba, M. Chiu, I.J. Choi, J. Choi, R.K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B.A. Cole, P. Constantin, D.G. d’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E.J. Desmond, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y.V. Efremenko, K. El Chenawi, A. Enokizono, H. En’yo, S. Esumi, L. Ewell, D.E. Fields, F. Fleuret, S.L. Fokin, B.D. Fox, Z. Fraenkel, J.E. Frantz, A. Franz, A.D. Frawley, S.-Y. Fung, S. Garpman, T.K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S.V. Greene, M. Grosse Perdekamp, W. Guryn, H.-Å. Gustafsson, T. Hachiya, J.S. Haggerty, H. Hamagaki, A.G. Hansen, E.P. Hartouni, M. Harvey, R. Hayano, X. He, M. Heffner, T.K. Hemmick, J.M. Heuser, M. Hibino, J.C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V.V. Ikonnikov, K. Imai, L.D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B.V. Jacak, W.Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B.M. Johnson, S.C. Johnson, K.S. Joo, D. Jouan, S. Kametani, N. Kamihara, J.H. Kang, S.S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D.H. Kim, D.J. Kim, D.W. Kim, E. Kim, G.-B. Kim, H.J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P.J. Kroon, C.H. Kuberg, K. Kurita, Y. Kuroki, M.J. Kweon, Y. Kwon, G.S. Kyle, R. Lacey, V. Ladygin, J.G. Lajoie, A. Lebedev, S. Leckey, D.M. Lee, S. Lee, M.J. Leitch, X.H. Li, H. Lim, A. Litvinenko, M.X. Liu, Y. Liu, C.F. Maguire, Y.I. Makdisi, A. Malakhov, V.I. Manko, Y. Mao, G. Martinez, M.D. Marx, H. Masui, F. Matathias, T. Matsumoto, P.L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T.E. Miller, A. Milov, S. Mioduszewski, R.E. Mischke, G.C. Mishra, J.T. Mitchell, A.K. Mohanty, D.P. Morrison, J.M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J.L. Nagle, T. Nakamura, B.K. Nandi, M. Nara, J. Newby, P. Nilsson, A.S. Nyanin, J. Nystrand, E. O’Brien, C.A. Ogilvie, H. Ohnishi, I.D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A.P.T. Palounek, V.S. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S.F. Pate, T. Peitzmann, J.-C. Peng, V. Peresedov, C. Pinkenburg, R.P. Pisani, F. Plasil, M.L. Purschke, A. Purwar, J. Rak, I. Ravinovich, K.F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S.S. Ryu, M.E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H.D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M.R. Shaw, T.K. Shea, T.-A. Shibata, K. Shigaki, T. Shiina, C.L. Silva, D. Silvermyr, K.S. Sim, C.P. Singh, V. Singh, M. Sivertz, A. Soldatov, R.A. Soltz, W.E. Sondheim, S.P. Sorensen, I.V. Sourikova, F. Staley, P.W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S.P. Stoll, T. Sugitate, J.P. Sullivan, E.M. Takagui, A. Taketani, M. Tamai, K.H. Tanaka, Y. Tanaka, K. Tanida, M.J. Tannenbaum, P. Tarján, J.D. Tepe, T.L. Thomas, J. Tojo, H. Torii, R.S. Towell, I. Tserruya, H. Tsuruoka, S.K. Tuli, H. Tydesjö, N. Tyurin, H.W. van Hecke, J. Velkovska, M. Velkovsky, L. Villatte, A.A. Vinogradov, M.A. Volkov, E. Vznuzdaev, X.R. Wang, Y. Watanabe, S.N. White, F.K. Wohn, C.L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G.R. Young, I.E. Yushmanov, W.A. Zajc, C. Zhang, S. Zhou, L. Zolin, (PHENIX Collaboration) Abilene Christian University, Abilene, TX 79699, USA Institute of Physics, Academia Sinica, Taipei 11529, Taiwan Department of Physics, Banaras Hindu University, Varanasi 221005, India Bhabha Atomic Research Centre, Bombay 400 085, India Brookhaven National Laboratory, Upton, NY 11973-5000, USA University of California Riverside, Riverside, CA 92521, USA China Institute of Atomic Energy (CIAE), Beijing, People’s Republic of China Center for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan Columbia University, New York, NY 10027 and Nevis Laboratories, Irvington, NY 10533, USA Dapnia, CEA Saclay, Bat. 703, F-91191, Gif-sur-Yvette, France

Measurements in Au+Au collisions at sqrt[s_{NN}]=200 GeV of jet correlations for a trigger hadron at intermediate transverse momentum (p_{T,trig}) with associated mesons or baryons at lower p_{T,assoc} indicate strong modification of the away-side jet. The ratio of jet-associated baryons to mesons increases with centrality and p_{T,assoc}. For the most central collisions, the ratio is similar to that for inclusive measurements. This trend is incompatible with in-vacuum fragmentation but could be due to jetlike contributions from correlated soft partons, which recombine upon hadronization.

The dependence of transverse momentum spectra of neutral pions and eta mesons with p(T) < 16 GeV/c and p(T) < 12 GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d + Au collisions at root s(NN) = 200 GeV. The measured yields are compared to those in p + p collisions at the same root s(NN) scaled by the number of underlying nucleon-nucleon collisions in d + Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central An + Au collisions at RHIC. Only a weak p(T) and centrality dependence can be observed.