Shower development dynamics for a jet traveling through the quark-gluon plasma (QGP) is a multiscale process, where the heavy flavor mass is an important scale. During the high virtuality portion of the jet evolution in the QGP, emission of gluons from a heavy flavor is modified owing to heavy quark mass. Medium-induced radiation of heavy flavor is sensitive to microscopic processes (e.g. diffusion), whose virtuality dependence is phenomenologically explored in this study. In the lower virtuality part of shower evolution, i.e. when the mass is comparable to the virtuality of the parton, scattering and radiation processes of heavy quarks differ from light quarks. The effects of these mechanisms on shower development in heavy flavor tagged showers in the QGP is explored here. Furthermore, this multiscale study examines dynamical pair production of heavy flavor (via virtual gluon splittings) and their subsequent evolution in the QGP, which is not possible otherwise. A realistic event-by-event simulation is performed using the JETSCAPE framework. Energy-momentum exchange with the medium proceeds using a weak coupling recoil approach. Using leading hadron and open heavy flavor observables, differences in heavy versus light quark energy-loss mechanisms are explored, while the importance of heavy flavor pair production is highlighted along with future directions to study.

AbstractThe HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of $$\alpha _s(M_Z^2)$$ α s ( M Z 2 ) and the PDFs, was performed with the result $$\alpha _s(M_Z^2)= 0.1156 \pm 0.0011~\mathrm{(exp)}~ ^{+0.0001}_{-0.0002}~ \mathrm{(model}$$ α s ( M Z 2 ) = 0.1156 ± 0.0011 ( exp ) - 0.0002 + 0.0001 ( model $$\mathrm{+ parameterisation)}~ \pm 0.0029~\mathrm{(scale)}$$ + parameterisation ) ± 0.0029 ( scale ) . The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of $$\alpha _s(M_Z^2)$$ α s ( M Z 2 ) , $$\alpha _s(M_Z^2)=0.1155$$ α s ( M Z 2 ) = 0.1155 and 0.118, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only. The different sets of PDFs are presented, evaluated and compared. The consistency of the PDFs determined with and without the jet data demonstrates the consistency of HERA inclusive and jet-production cross-section data. The inclusion of the jet data reduced the uncertainty on the gluon PDF. Predictions based on the PDFs of HERAPDF2.0Jets NNLO give an excellent description of the jet-production data used as input.

This paper is a write-up of the ideas that were presented, developed and discussed at the third International Workshop on QCD Challenges from pp to A–A, which took place in August 2019 in Lund, Sweden (Workshop link: https://indico.lucas.lu.se/event/1214/ ). The goal of the workshop was to focus on some of the open questions in the field and try to come up with concrete suggestions for how to make progress on both the experimental and theoretical sides. The paper gives a brief introduction to each topic and then summarizes the primary results.

The performance of prototypes for the ALICE electromagnetic sampling calorimeter has been studied in test beam measurements at FNAL and CERN. A 4×4 array of final design modules showed an energy resolution of about 11%/E(GeV)⊕1.7% with a uniformity of the response to electrons of 1% and a good linearity in the energy range from 10 to 100GeV. The electromagnetic shower position resolution was found to be described by 1.5mm⊕5.3mm/E(GeV). For an electron identification efficiency of 90% a hadron rejection factor of >600 was obtained.

Soils are natural bodies. Their characteristics result from the interaction of meteorologi- cal conditions (climate) on outcropping lithospheric materials over long periods of time. Plant cover produces organic residues which are incorporated into the soil by numerous and diverse soil organisms. Landscape position determines if the new formed mineral and organic (humic) materials stay in place, or if they are transported down slopes and eventually accumulate on foothills, valleys or plains, or end as sediments in rivers, lakes or oceans. On stable landscape positions, soil formation progresses and the soil differentiates into several horizons with distinct properties that reflect the dominant soil forming processes. Soil forming processes include weathering of primary minerals and the neoformation of clay minerals and oxides, humification of organic matter and aggregation of primary soil particles, along with translocation of clay (clay illuviation) or of metal-organic complexes (podsolization), dissolution and precipitation of secondary carbonates, among several other processes... SEE FULL ARTICLE

We review recent progress in the study of medium-induced modification of jet fragmentation in high energy nuclear collisions at the SPS and RHIC and present an outlook on jet physics at the LHC.

Photon and neutral pion production in Au+Au collisions at s NN = 130 GeV J. Adams, 3 C. Adler, 12 M.M. Aggarwal, 25 Z. Ahammed, 28 J. Amonett, 17 B.D. Anderson, 17 M. Anderson, 5 D. Arkhipkin, 11 G.S. Averichev, 10 S.K. Badyal, 16 J. Balewski, 13 O. Barannikova, 28, 10 L.S. Barnby, 17 J. Baudot, 15 S. Bekele, 24 V.V. Belaga, 10 R. Bellwied, 41 J. Berger, 12 B.I. Bezverkhny, 43 S. Bhardwaj, 29 P. Bhaskar, 38 A.K. Bhati, 25 H. Bichsel, 40 A. Billmeier, 41 L.C. Bland, 2 C.O. Blyth, 3 B.E. Bonner, 30 M. Botje, 23 A. Boucham, 34 A. Brandin, 21 A. Bravar, 2 R.V. Cadman, 1 X.Z. Cai, 33 H. Caines, 43 M. Calder´ n de la Barca S´ nchez, 2 J. Carroll, 18 o a J. Castillo, 18 M. Castro, 41 D. Cebra, 5 P. Chaloupka, 9 S. Chattopadhyay, 38 H.F. Chen, 32 Y. Chen, 6 S.P. Chernenko, 10 M. Cherney, 8 A. Chikanian, 43 B. Choi, 36 W. Christie, 2 J.P. Coffin, 15 T.M. Cormier, 41 J.G. Cramer, 40 H.J. Crawford, 4 D. Das, 38 S. Das, 38 A.A. Derevschikov, 27 L. Didenko, 2 T. Dietel, 12 X. Dong, 32, 18 J.E. Draper, 5 F. Du, 43 A.K. Dubey, 14 V.B. Dunin, 10 J.C. Dunlop, 2 M.R. Dutta Majumdar, 38 V. Eckardt, 19 L.G. Efimov, 10 V. Emelianov, 21 J. Engelage, 4 G. Eppley, 30 B. Erazmus, 34 M. Estienne, 34 P. Fachini, 2 V. Faine, 2 J. Faivre, 15 R. Fatemi, 13 K. Filimonov, 18 P. Filip, 9 E. Finch, 43 Y. Fisyak, 2 D. Flierl, 12 K.J. Foley, 2 J. Fu, 42 C.A. Gagliardi, 35 M.S. Ganti, 38 T.D. Gutierrez, 5 N. Gagunashvili, 10 J. Gans, 43 L. Gaudichet, 34 M. Germain, 15 F. Geurts, 30 V. Ghazikhanian, 6 P. Ghosh, 38 J.E. Gonzalez, 6 O. Grachov, 41 V. Grigoriev, 21 S. Gronstal, 8 D. Grosnick, 37 M. Guedon, 15 S.M. Guertin, 6 A. Gupta, 16 E. Gushin, 21 T.J. Hallman, 2 D. Hardtke, 18 J.W. Harris, 43 M. Heinz, 43 T.W. Henry, 35 S. Heppelmann, 26 T. Herston, 28 B. Hippolyte, 43 A. Hirsch, 28 E. Hjort, 18 G.W. Hoffmann, 36 M. Horsley, 43 H.Z. Huang, 6 S.L. Huang, 32 T.J. Humanic, 24 G. Igo, 6 A. Ishihara, 36 P. Jacobs, 18 W.W. Jacobs, 13 M. Janik, 39 I. Johnson, 18 P.G. Jones, 3 E.G. Judd, 4 S. Kabana, 43 M. Kaneta, 18 M. Kaplan, 7 D. Keane, 17 J. Kiryluk, 6 A. Kisiel, 39 J. Klay, 18 S.R. Klein, 18 A. Klyachko, 13 D.D. Koetke, 37 T. Kollegger, 12 A.S. Konstantinov, 27 M. Kopytine, 17 L. Kotchenda, 21 A.D. Kovalenko, 10 M. Kramer, 22 P. Kravtsov, 21 K. Krueger, 1 C. Kuhn, 15 A.I. Kulikov, 10 A. Kumar, 25 G.J. Kunde, 43 C.L. Kunz, 7 R.Kh. Kutuev, 11 A.A. Kuznetsov, 10 M.A.C. Lamont, 3 J.M. Landgraf, 2 S. Lange, 12 C.P. Lansdell, 36 B. Lasiuk, 43 F. Laue, 2 J. Lauret, 2 A. Lebedev, 2 R. Lednick´ , 10 V.M. Leontiev, 27 M.J. LeVine, 2 C. Li, 32 y Q. Li, 41 S.J. Lindenbaum, 22 M.A. Lisa, 24 F. Liu, 42 L. Liu, 42 Z. Liu, 42 Q.J. Liu, 40 T. Ljubicic, 2 W.J. Llope, 30 H. Long, 6 R.S. Longacre, 2 M. Lopez-Noriega, 24 W.A. Love, 2 T. Ludlam, 2 D. Lynn, 2 J. Ma, 6 Y.G. Ma, 33 D. Magestro, 24 S. Mahajan, 16 L.K. Mangotra, 16 D.P. Mahapatra, 14 R. Majka, 43 R. Manweiler, 37 S. Margetis, 17 C. Markert, 43 L. Martin, 34 J. Marx, 18 H.S. Matis, 18 Yu.A. Matulenko, 27 T.S. McShane, 8 F. Meissner, 18 Yu. Melnick, 27 A. Meschanin, 27 M. Messer, 2 M.L. Miller, 43 Z. Milosevich, 7 N.G. Minaev, 27 C. Mironov, 17 D. Mishra, 14 J. Mitchell, 30 B. Mohanty, 38 L. Molnar, 28 C.F. Moore, 36 M.J. Mora-Corral, 19 V. Morozov, 18 M.M. de Moura, 41 M.G. Munhoz, 31 B.K. Nandi, 38 S.K. Nayak, 16 T.K. Nayak, 38 J.M. Nelson, 3 P. Nevski, 2 V.A. Nikitin, 11 L.V. Nogach, 27 B. Norman, 17 S.B. Nurushev, 27 G. Odyniec, 18 A. Ogawa, 2 V. Okorokov, 21 M. Oldenburg, 18 D. Olson, 18 G. Paic, 24 S.U. Pandey, 41 S.K. Pal, 38 Y. Panebratsev, 10 S.Y. Panitkin, 2 A.I. Pavlinov, 41 T. Pawlak, 39 V. Perevoztchikov, 2 W. Peryt, 39 V.A. Petrov, 11 S.C. Phatak, 14 R. Picha, 5 M. Planinic, 44 J. Pluta, 39 N. Porile, 28 J. Porter, 2 A.M. Poskanzer, 18 M. Potekhin, 2 E. Potrebenikova, 10 B.V.K.S. Potukuchi, 16 D. Prindle, 40 C. Pruneau, 41 J. Putschke, 19 G. Rai, 18 G. Rakness, 13 R. Raniwala, 29 S. Raniwala, 29 O. Ravel, 34 R.L. Ray, 36 S.V. Razin, 10, 13 D. Reichhold, 28 J.G. Reid, 40 G. Renault, 34 F. Retiere, 18 A. Ridiger, 21 H.G. Ritter, 18 J.B. Roberts, 30 O.V. Rogachevski, 10 J.L. Romero, 5 A. Rose, 41 C. Roy, 34 L.J. Ruan, 32, 2 R. Sahoo, 14 I. Sakrejda, 18 S. Salur, 43 J. Sandweiss, 43 I. Savin, 11 J. Schambach, 36 R.P. Scharenberg, 28 N. Schmitz, 19 L.S. Schroeder, 18 K. Schweda, 18 J. Seger, 8 D. Seliverstov, 21 P. Seyboth, 19 E. Shahaliev, 10 M. Shao, 32 M. Sharma, 25 K.E. Shestermanov, 27 S.S. Shimanskii, 10 R.N. Singaraju, 38 F. Simon, 19 G. Skoro, 10 N. Smirnov, 43 R. Snellings, 23 G. Sood, 25 P. Sorensen, 6 J. Sowinski, 13 H.M. Spinka, 1 B. Srivastava, 28 S. Stanislaus, 37 R. Stock, 12 A. Stolpovsky, 41 M. Strikhanov, 21 B. Stringfellow, 28 C. Struck, 12 A.A.P. Suaide, 41 E. Sugarbaker, 24 C. Suire, 2 M. Sumbera, 9 B. Surrow, 2 T.J.M. Symons, A. Szanto de Toledo, P. Szarwas, A. Tai, J. Takahashi, A.H. Tang, 2, 23 D. Thein, 6 J.H. Thomas, 18 V. Tikhomirov, 21 M. Tokarev, 10 M.B. Tonjes, 20 T.A. Trainor, 40 S. Trentalange, 6 R.E. Tribble, 35 M.D. Trivedi, 38 V. Trofimov, 21 O. Tsai, 6 T. Ullrich, 2 D.G. Underwood, 1 G. Van Buren, 2 A.M. VanderMolen, 20 A.N. Vasiliev, 27 M. Vasiliev, 35 S.E. Vigdor, 13 Y.P. Viyogi, 38 S.A. Voloshin, 41 W. Waggoner, 8 F. Wang, 28 G. Wang, 17 X.L. Wang, 32 Z.M. Wang, 32 H. Ward, 36 J.W. Watson, 17 R. Wells, 24 G.D. Westfall, 20 C. Whitten Jr., 6 H. Wieman, 18 R. Willson, 24 S.W. Wissink, 13 R. Witt, 43 J. Wood, 6 J. Wu, 32 N. Xu, 18 Z. Xu, 2 Z.Z. Xu, 32 A.E. Yakutin, 27 E. Yamamoto, 18 J. Yang, 6 P. Yepes, 30 V.I. Yurevich, 10 Y.V. Zanevski, 10 I. Zborovsk´ , 9 H. Zhang, 43, 2 H.Y. Zhang, 17 y W.M. Zhang, 17 Z.P. Zhang, 32 P.A. Zolnierczuk, 13 R. Zoulkarneev, 11 J. Zoulkarneeva, 11 and A.N. Zubarev 10 (STAR Collaboration) , ∗ arXiv:nucl-ex/0401008 v1 8 Jan 2004 Argonne National Laboratory, Argonne, Illinois 60439

The transverse mass m(t) distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<m(t)-m< 1.0 (1.5) GeV/c(2) for minimum bias collisions at 158A GeV and for central collisions at 40 and 80 A GeV beam energies. The rapidity density dn/dy, inverse slope parameter T and mean transverse mass [m(t)] derived from m(t) distributions as well as the coalescence parameter B-2 are studied as a function of the incident energy and the collision centrality. The deuteron m(t) spectra are significantly harder than those of protons, especially in central collisions. The coalescence factor B-2 shows three systematic trends. First, it decreases strongly with increasing centrality reflecting an enlargement of the deuteron coalescence volume in central Pb+Pb collisions. Second, it increases with m,. Finally, B-2 shows an increase with decreasing incident beam energy even within the SPS energy range. The results are discussed and compared to the predictions of models that include the collective expansion of the source created in Pb+Pb collisions.

Data from the first physics run at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory, Au+Au collisions at sqrt[s(NN)]=130 GeV, have been analyzed by the STAR Collaboration using three-pion correlations with charged pions to study whether pions are emitted independently at freeze-out. We have made a high-statistics measurement of the three-pion correlation function and calculated the normalized three-particle correlator to obtain a quantitative measurement of the degree of chaoticity of the pion source. It is found that the degree of chaoticity seems to increase with increasing particle multiplicity.

Directed and elliptic flow measurements for charged pions and protons are reported as a function of transverse momentum, rapidity, and centrality for 40 and 158A GeV Pb + Pb collisions as recorded by the NA49 detector. Both the standard method of correlating particles with an event plane, and the cumulant method of studying multiparticle correlations are used. In the standard method the directed flow is corrected for conservation of momentum. In the cumulant method elliptic flow is reconstructed from genuine 4, 6, and 8-particle correlations, showing the first unequivocal evidence for collective motion in A+A collisions at SPS energies.

Azimuthal anisotropy (v(2)) and two-particle angular correlations of high p(T) charged hadrons have been measured in Au+Au collisions at sqrt[s(NN)]=130 GeV for transverse momenta up to 6 GeV/c, where hard processes are expected to contribute significantly. The two-particle angular correlations exhibit elliptic flow and a structure suggestive of fragmentation of high p(T) partons. The monotonic rise of v(2)(p(T)) for p(T)<2 GeV/c is consistent with collective hydrodynamical flow calculations. At p(T)>3 GeV/c, a saturation of v(2) is observed which persists up to p(T)=6 GeV/c.

The balance function is a new observable based on the principle that charge is locally conserved when particles are pair produced. Balance functions have been measured for charged particle pairs and identified charged pion pairs in Au+Au collisions at $\sqrt{s_{NN}}$ = 130 GeV at the Relativistic Heavy Ion Collider using STAR. Balance functions for peripheral collisions have widths consistent with model predictions based on a superposition of nucleon-nucleon scattering. Widths in central collisions are smaller, consistent with trends predicted by models incorporating late hadronization.

We review recent measurements of high transverse momentum (high p(T)) hadron production in nuclear collisions by the STAR Collaboration at RHIC. The previously observed suppression in central Au+Au collisions has been extended to much higher PT. New measurements from d+Au collisions are presented which help disentangle the mechanisms responsible for the suppression. Inclusive single hadron spectra are enhanced in d+Au relative to p+p, while two-particle azimuthal distributions are observed to be similar in p+p, d+Au and peripheral Au+Au collisions. The large suppression of inclusive hadron production and absence of the away-side jet-like correlations in central Au+Au collisions are shown to be due to interactions of the jets with the very dense medium produced in these collisions.

Elliptic flow holds much promise for studying the early-time thermalization attained in ultrarelativistic nuclear collisions. Flow measurements also provide a means of distinguishing between hydrodynamic models and calculations which approach the low density (dilute gas) limit. Among the effects that can complicate the interpretation of elliptic flow measurements are azimuthal correlations that are unrelated to the reaction plane (non-flow correlations). Using data for Au + Au collisions at sqrts_NN = 130 GeV from the STAR TPC, it is found that four-particle correlation analyses can reliably separate flow and non-flow correlation signals. The latter account for on average about 15 of the observed second-harmonic azimuthal correlation, with the largest relative contribution for the most peripheral and the most central collisions. The results are also corrected for the effect of flow variations within centrality bins. This effect is negligible for all but the most central bin, where the correction to the elliptic flow is about a factor of two. A simple new method for two-particle flow analysis based on scalar products is described. An analysis based on the distribution of the magnitude of the flow vector is also described.

We report the first measurement of strange (Lambda) and antistrange (Lambda macro) baryon production from square root of [s(NN)]=130 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). Rapidity density and transverse mass distributions at midrapidity are presented as a function of centrality. The yield of Lambda and Lambda; hyperons is found to be approximately proportional to the number of negative hadrons. The production of Lambda; hyperons relative to negative hadrons increases very rapidly with transverse momentum. The magnitude of the increase cannot be described by existing hadronic string fragmentation models alone.

Mid-rapidity Λ and Λ Production in Au+Au Collisions at s N N = 130 GeV C. Adler 11 , Z. Ahammed 23 , C. Allgower 12 , J. Amonett 14 , B.D. Anderson 14 , M. Anderson 5 , G.S. Averichev 9 , J. Balewski 12 , O. Barannikova 9,23 , L.S. Barnby 14 , J. Baudot 13 , S. Bekele 20 , V.V. Belaga 9 , R. Bellwied 31 , J. Berger 11 , H. Bichsel 30 , L.C. Bland 2 , C.O. Blyth 3 , B.E. Bonner 24 , A. Boucham 26 , A. Brandin 18 , A. Bravar 2 , R.V. Cadman 1 , H. Caines 20 , M. Calder´ n de la Barca S´ nchez 2 , A. Cardenas 23 , J. Carroll 15 , J. Castillo 26 , M. Castro 31 , D. Cebra 5 , o a P. Chaloupka 20 , S. Chattopadhyay 31 , Y. Chen 6 , S.P. Chernenko 9 , M. Cherney 8 , A. Chikanian 33 , B. Choi 28 , W. Christie 2 , J.P. Coffin 13 , T.M. Cormier 31 , J.G. Cramer 30 , H.J. Crawford 4 , W.S. Deng 2 , A.A. Derevschikov 22 , L. Didenko 2 , T. Dietel 11 , J.E. Draper 5 , V.B. Dunin 9 , J.C. Dunlop 33 , V. Eckardt 16 , L.G. Efimov 9 , V. Emelianov 18 , J. Engelage 4 , G. Eppley 24 , B. Erazmus 26 , P. Fachini 2 , V. Faine 2 , K. Filimonov 15 , E. Finch 33 , Y. Fisyak 2 , D. Flierl 11 , K.J. Foley 2 , J. Fu 15,32 , C.A. Gagliardi 27 , N. Gagunashvili 9 , J. Gans 33 , L. Gaudichet 26 , M. Germain 13 , F. Geurts 24 , V. Ghazikhanian 6 , O. Grachov 31 , V. Grigoriev 18 , M. Guedon 13 , E. Gushin 18 , T.J. Hallman 2 , D. Hardtke 15 , J.W. Harris 33 , T.W. Henry 27 , S. Heppelmann 21 , T. Herston 23 , B. Hippolyte 13 , A. Hirsch 23 , E. Hjort 15 , G.W. Hoffmann 28 , M. Horsley 33 , H.Z. Huang 6 , T.J. Humanic 20 , G. Igo 6 , A. Ishihara 28 , Yu.I. Ivanshin 10 , P. Jacobs 15 , W.W. Jacobs 12 , M. Janik 29 , I. Johnson 15 , P.G. Jones 3 , E.G. Judd 4 , M. Kaneta 15 , M. Kaplan 7 , D. Keane 14 , J. Kiryluk 6 , A. Kisiel 29 , J. Klay 15 , S.R. Klein 15 , A. Klyachko 12 , A.S. Konstantinov 22 , M. Kopytine 14 , L. Kotchenda 18 , A.D. Kovalenko 9 , M. Kramer 19 , P. Kravtsov 18 , K. Krueger 1 , C. Kuhn 13 , A.I. Kulikov 9 , G.J. Kunde 33 , C.L. Kunz 7 , R.Kh. Kutuev 10 , A.A. Kuznetsov 9 , L. Lakehal-Ayat 26 , M.A.C. Lamont 3 , J.M. Landgraf 2 , S. Lange 11 , C.P. Lansdell 28 , B. Lasiuk 33 , F. Laue 2 , A. Lebedev 2 , R. Lednick´ 9 , V.M. Leontiev 22 , y M.J. LeVine 2 , Q. Li 31 , S.J. Lindenbaum 19 , M.A. Lisa 20 , F. Liu 32 , L. Liu 32 , Z. Liu 32 , Q.J. Liu 30 , T. Ljubicic 2 , W.J. Llope 24 , G. LoCurto 16 , H. Long 6 , R.S. Longacre 2 , M. Lopez-Noriega 20 , W.A. Love 2 , T. Ludlam 2 , D. Lynn 2 , J. Ma 6 , R. Majka 33 , S. Margetis 14 , C. Markert 33 , L. Martin 26 , J. Marx 15 , H.S. Matis 15 , Yu.A. Matulenko 22 , T.S. McShane 8 , F. Meissner 15 , Yu. Melnick 22 , A. Meschanin 22 , M. Messer 2 , M.L. Miller 33 , Z. Milosevich 7 , N.G. Minaev 22 , J. Mitchell 24 V.A. Moiseenko 10 , C.F. Moore 28 , V. Morozov 15 , M.M. de Moura 31 , M.G. Munhoz 25 , J.M. Nelson 3 , P. Nevski 2 , V.A. Nikitin 10 , L.V. Nogach 22 , B. Norman 14 , S.B. Nurushev 22 , G. Odyniec 15 , A. Ogawa 21 , V. Okorokov 18 , M. Oldenburg 16 , D. Olson 15 , G. Paic 20 , S.U. Pandey 31 , Y. Panebratsev 9 , S.Y. Panitkin 2 , A.I. Pavlinov 31 , T. Pawlak 29 , V. Perevoztchikov 2 , W. Peryt 29 , V.A Petrov 10 , M. Planinic 12 , J. Pluta 29 , N. Porile 23 , J. Porter 2 , A.M. Poskanzer 15 , E. Potrebenikova 9 , D. Prindle 30 , C. Pruneau 31 , J. Putschke 16 , G. Rai 15 , G. Rakness 12 , O. Ravel 26 , R.L. Ray 28 , S.V. Razin 9,12 , D. Reichhold 8 , J.G. Reid 30 , F. Retiere 15 , A. Ridiger 18 , H.G. Ritter 15 , J.B. Roberts 24 , O.V. Rogachevski 9 , J.L. Romero 5 , C. Roy 26 , V. Rykov 31 , I. Sakrejda 15 , S. Salur 33 , J. Sandweiss 33 , A.C. Saulys 2 , I. Savin 10 , J. Schambach 28 , R.P. Scharenberg 23 , N. Schmitz 16 , L.S. Schroeder 15 , A. Sch¨ ttauf 16 , u K. Schweda 15 , J. Seger 8 , D. Seliverstov 18 , P. Seyboth 16 , E. Shahaliev 9 , K.E. Shestermanov 22 , S.S. Shimanskii 9 , V.S. Shvetcov 10 , G. Skoro 9 , N. Smirnov 33 , R. Snellings 15 , P. Sorensen 6 , J. Sowinski 12 , H.M. Spinka 1 , B. Srivastava 23 , E.J. Stephenson 12 , R. Stock 11 , A. Stolpovsky 31 , M. Strikhanov 18 , B. Stringfellow 23 , C. Struck 11 , A.A.P. Suaide 31 , E. Sugarbaker 20 , C. Suire 2 , M. Sumbera 20 , B. Surrow 2 , T.J.M. Symons 15 , A. Szanto de Toledo 25 , P. Szarwas 29 , A. Tai 6 , J. Takahashi , A.H. Tang , J.H. Thomas 15 , M. Thompson 3 , V. Tikhomirov 18 , M. Tokarev 9 , M.B. Tonjes 17 , T.A. Trainor 30 , S. Trentalange 6 , R.E. Tribble 27 , V. Trofimov 18 , O. Tsai 6 , T. Ullrich 2 , D.G. Underwood 1 , G. Van Buren 2 , A.M. VanderMolen 17 , I.M. Vasilevski 10 , A.N. Vasiliev 22 , S.E. Vigdor 12 , S.A. Voloshin 31 , F. Wang 23 , H. Ward 28 , J.W. Watson 14 , R. Wells 20 , G.D. Westfall 17 , C. Whitten Jr. 6 , H. Wieman 15 , R. Willson 20 , S.W. Wissink 12 , R. Witt 32 , J. Wood 6 , N. Xu 15 , Z. Xu 2 , A.E. Yakutin 22 , E. Yamamoto 15 , J. Yang 6 , P. Yepes 24 , V.I. Yurevich 9 , Y.V. Zanevski 9 , I. Zborovsk´ 9 , H. Zhang 33 , W.M. Zhang 14 , R. Zoulkarneev 10 , A.N. Zubarev 9 y (STAR Collaboration) arXiv:nucl-ex/0203016 v1 22 Mar 2002 Argonne National Laboratory, Argonne, Illinois 60439 Brookhaven National Laboratory, Upton, New York 11973 University of Birmingham, Birmingham, United Kingdom University of California, Berkeley, California 94720 University of California, Davis, California 95616 University of California, Los Angeles, California 90095 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 Creighton University, Omaha, Nebraska 68178 Laboratory for High Energy (JINR), Dubna, Russia Particle Physics Laboratory (JINR), Dubna, Russia