Observation And Studies Of Double J/Psi Production At The Tevatron V M Abazov , A Kupco , A V Kozelov , E Camachoperez , M D Hildreth , Mark Hohlfeld , Y Enari , A Jonckheere , B C K Casey , G W Wilson , U Heintz , M P Sanders , J D Hobbs , V A Kuzmin , Darren Price , J Hays , L Zivkovic , M Cooke , S Greder , Richard J Van Kooten , E Chapon , C Royon , J P Negret , T G Zhao , A Juste , Y N Kharzheev , J Weichert , Arnd Meyer , B Hoeneisen , I Rippbaudot , V Hynek , N Khalatyan , O Gogota , K Johns , S Uzunyan , Bannanje Sripath Acharya , Hengne Li , T Hebbeker , P Skubic , I Howley , Jan Stark , Sungwoong Cho , M W Gruenewald , P Neustroev , A Harel , R Hirosky , G Davies , Ashish Kumar , M Fortner , V L Malyshev , R Partridge , Alexey Popov , Phillipe Luc Gris , Willem M Van Leeuwen , Zhenyu Ye , T Hoang , V N Evdokimov , J A Garciagonzalez , M C Cousinou , Harald Fox , K Yip , T R Wyatt , W Fisher , H Severini , C L Mcgivern , V V Lipaev , Liang Han , Heugene Fisk , A Melnitchouk , K Petridis , M Begalli , C Avila , V E Bazterra , J Ellison , L S Vertogradov , M Vesterinen , L Sonnenschein , P Lebrun , G Hesketh , R D Schamberger , J Osta , R Kehoe , J Martinezortega , J Orduna , M Rominsky , Jiaming Yu , Kwok Ming Leo Chan , I Bertram , David G Savage , Y Xie , Hang Yin , V M Podstavkov , A Khanov , Qizhong Li , F Couderc , L V Dudko , J Snow , M Diesburg , D Denisov , A K Dubey , G Ginther , B Baldin , M A Pleier , A S Ito , K Harder , Bing Zhou , N Osman , Sijbrand Jan De Jong , R Lipton , M Prewitt , C Deterre , Eduard De La Cruzburelo , Sudeep Bhatia , D Smirnov , Savanna Shaw , S Kermiche , Wanyu Ye , V Shary , S P Denisov , R Demina , F Rizatdinova , Z Hubacek , A Y Verkheev , P C Bhat , F Fiedler , P Slattery , H Evans , C P Buszello , M Jaffre , S Burdin , A L Lyon , R Madar , Gianluca Petrillo , Julie Hogan , A A Shchukin , A Faure , R Beuselinck , J Clutter , W M Lee , M Borysova , P Svoisky , J Zennamo , T Kurca , P H Garbincius , A W Jung , M Zielinski , T Nunnemann , M Perfilov , V Simak , Arnab Pal , M Wobisch , J M Kohli , K Augsten , P Baringer , V Buescher , D Claes , N Parashar , P N Ratoff , I Razumov , G Watts , A Lobodenko , M Mulhearn , R Brock , R Bernhard , A S Santos , W Geng , V V Tokmenin , A Sanchezhernandez , G Golovanov , R Ruchti , Minsoo Jeong , V Bunichev , Arnulf Quadt , Y Scheglov , B Penning , L Weltyrieger , A Grohsjean , C Schwanenberger , G Gutierrez , E Nagy , Rafael Lopes De Sa , A P Heinson , V Parihar , Michael Hls Wang , Emily Johnson , S Blessing , J M Hauptman , C Hensel , Y A Yatsunenko , Ivan Herediade La Cruz , D P Brown , F Filthaut , A Boehnlein , G Borissov , G Grenier , N Varelas , A Garciabellido , P D Grannis , M Narain , K Soustruznik , H Schellman , E Shabalina , Jeong Ku Lim , Yanwen Liu , Amitabha Das , G Alkhazov , N Parua , R Illingworth , R Lunagarcia , M M Meijer , G D Alexeev , G Sajot , Todd Adams , P Vokac , A Alton , J F Grivaz , M Titov , D Boline , Jfrederick Bartlett , A Patwa , S B Beri , Breese Quinn , Y Ilchenko , S Desai , Sehwook Lee , M Corcoran , T Scanlon , J P Agnew , S Atkins , D Zieminska , C E Gerber , D V Bandurin , Phillip Gutierrez , T Guillemin , Subhendu Chakrabarti , Marc Buehler , S K Park , Marvin Johnson , E E Boos , E Kajfasz , Hlee Sawyer , Dikai Li , M Savitskyi , B Tuchming , J Kraus , S Cihangir , B Choudhary , I A Vasilyev , V Bhatnagar , Junjie Zhu , Sudhir Malik , Lei Feng , M Adams , D R Wood , Y Gershtein , Huanzhao Liu , Vdaniel Elvira , Siqi Yang , Pengfei Ding , G Blazey , A Bross , N K Mondal , Anthony Ross , S Lammers , T Head , Sunanda Banerjee , R Jesik , M Wayne , H Castillavaldez , S Caughron , L Bagby , I Kiselevich , K Herner , A Duperrin , H A Neal , Jeremie Lellouch , S Dutt , K Bloom , A Jayasinghe , R Yamada , Guo Chen , L Bellantoni , J Sekaric , P Rubinov , W E Cooper , S Gruenendahl , U Bassler , Liang Li , S Snyder , D Karmanov , M Strauss , I Katsanos , A Brandt , Frederique Badaud , D Vilanova , Jason Mansour , Jianming Qian , M Verzocchi , Sungwoo Youn , R Mccarthy , A Kharchilava , M Merkin , A Bean , Oleg Brandt , G R Snow , A Chandra , Xiaowen Lei , S Soldnerrembold , L Uvarov , T Ferbel , D A Stoyanova , J Linnemann , Yuntse Tsai , S Fuess , T Yasuda , F Deliot , Arthur Ka Maciel , S Jabeen , Reinhild Yvonne Fatima Peters , E Barberis , Daaron M Dominguez , Hthomas Diehl , J Haley , M Besancon , V Gavrilov , K Devaughan , G Bernardi , H D Wahl , Peng Jiang , C Tully , J L Holzbauer , M Eads , E W Varnes , P Jonsson , S Uvarov , D Menezes , D Lincoln , Suyong Choi , A Askew , Xuebing Bu , D Edmunds , P Petroff , Louise Suter , D Hedin , B Abbott , D Tsybychev , D Cutts , N Prokopenko , F Miconi , R Schwienhorst , R Maganavillalba , M R J Williams , Hatim Hegab , Hyunsu Lee , P G Mercadante , J Meyer , I Iashvili , M Lokajicek , Jadwiga Warchol , Jyoti Joshi , R Nayyar , H Greenlee , H T Nguyen PHYSICAL REVIEW D(2014)
摘要
We present the observation of doubly produced J/psi mesons with the D0 detector at Fermilab in p (p) over bar collisions at root s = 1.96 TeV. The production cross section for both singly and doubly produced J/psi mesons is measured using a sample with an integrated luminosity of 8.1 fb(-1). For the first time, the double J/psi production cross section is separated into contributions due to single and double parton scatterings. Using these measurements, we determine the effective cross section seff, a parameter characterizing an effective spatial area of the parton-parton interactions and related to the parton spatial density inside the nucleon.
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physical sciences, meson, nucleon, density, natural sciences
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