Measurement Of Associated Production Of Z Bosons With Charm Quark Jets In P(P)Over-Bar Collisions At Root S = 1.96 Tev Abazov , Abbott , Acharya , Adams , Agnew , Alexeev , Alkhazov , Alton , Askew , Atkins , Augsten , Avila , Badaud , Bagby , Baldin , Bandurin , Banerjee , Barberis , Baringer , Bartlett , Bassler , Bazterra , Bean , Begalli , Bellantoni , Beri , Bernardi , Bernhard , Bertram , Besan?on , Beuselinck , Bhat , Bhatia , Bhatnagar , Blazey , Blessing , Bloom , Boehnlein , Boline , Boos , Borissov , Brandt , Brock , Bross , Brown , Bu , Buehler , Buescher , Bunichev , Burdin , Buszello , Camacho-P��rez , Casey , Castilla-Valdez , Caughron , Chakrabarti , Chan , Chandra , Chapon , Chen , Cho , Choi , Choudhary , Cihangir , Claes , Clutter , Cooke , Cooper , Corcoran , Couderc , Cousinou , Cutts , Das , Davies , De Jong , De La Cruz-Burelo , D��liot , Demina , Denisov , Desai , Deterre , Devaughan , Diehl , Diesburg , Ding , Dominguez , Dubey , Dudko , Duperrin , Dutt , Eads , Edmunds , Ellison , Elvira , Enari , Evans , Evdokimov , Feng , Ferbel , Fiedler , Filthaut , Fisher , Fisk , Fortner , Fox , Fuess , Garcia-Bellido , Garc��a-Gonz��lez , Gavrilov , Geng , Gerber , Gershtein , Ginther , Golovanov , Grannis , Greder , Greenlee , Grenier , Gris , Grivaz , Grohsjean , Gr��nendahl , Gr��newald , Guillemin , Gutierrez , Haley , Han , Harder , Harel , Hauptman , Hays , Head , Hebbeker , Hedin , Hegab , Heinson , Heintz , Hensel , Heredia-De La Cruz , Herner , Hesketh , Hildreth , Hirosky , Hoang , Hobbs , Hoeneisen , Hogan , Hohlfeld , Holzbauer , Howley , Hubacek , Hynek , Iashvili , Ilchenko , Illingworth , Ito , Jabeen , Jaffr�� , Jayasinghe , Jeong , Jesik , Jiang , Johns , Johnson , Jonckheere , Jonsson , Joshi , Jung , Juste , Kajfasz , Karmanov , Katsanos , Kehoe , Kermiche , Khalatyan , Khanov , Kharchilava , Kharzheev , Kiselevich , Kohli , Kozelov , Kraus , Kumar , Kupco , Kur?a , Kuzmin , Lammers , Lebrun , Lee , Lei , Lellouch , Li , Lim , Lincoln , Linnemann , Lipaev , Lipton , Liu , Lobodenko , Lokajicek , Lopes De Sa , Luna-Garcia , Lyon , Maciel , Madar , Maga?a-Villalba , Malik , Malyshev , Mansour , Mart��nez-Ortega , McCarthy , McGivern , Meijer , Melnitchouk , Menezes , Mercadante , Merkin , Meyer , Miconi , Mondal , Mulhearn , Nagy , Narain , Nayyar , Neal , Negret , Neustroev , Nguyen , Nunnemann , Orduna , Osman , Osta , Pal , Parashar , Parihar , Park , Partridge , Parua , Patwa , Penning , Perfilov , Peters , Petridis , Petrillo , P��troff , Pleier , Podstavkov , Popov , Prewitt , Price , Prokopenko , Qian , Quadt , Quinn , Ratoff , Razumov , Ripp-Baudot , Rizatdinova , Rominsky , Ross , Royon , Rubinov , Ruchti , Sajot , S��nchez-Hern��ndez , Sanders , Santos , Savage , Sawyer , Scanlon , Schamberger , Scheglov , Schellman , Schwanenberger , Schwienhorst , Sekaric , Severini , Shabalina , Shary , Shaw , Shchukin , Simak , Skubic , Slattery , Smirnov , Snow , Snyder , S?ldner-Rembold , Sonnenschein , Soustruznik , Stark , Stoyanova , Strauss , Suter , Svoisky , Titov , Tokmenin , Tsai , Tsybychev , Tuchming , Tully , Uvarov , Uzunyan , Van Kooten , Van Leeuwen , Varelas , Varnes , Vasilyev , Verkheev , Vertogradov , Verzocchi , Vesterinen , Vilanova , Vokac , Wahl , Wang , Warchol , Watts , Wayne , Weichert , Welty-Rieger , Williams , Wilson , Wobisch , Wood , Wyatt , Xie , Yamada , Yang , Yasuda , Yatsunenko , Ye , Yin , Yip , Youn , Yu , Zennamo , Zhao , Zhou , Zhu , Zielinski , Zieminska , Zivkovic PHYSICAL REVIEW LETTERS（2014）
摘要
We present the first measurements of the ratios of cross sections sigma(p (p) over bar -> Z + c jet)/sigma(p (p) over bar -> Z + jet) and sigma(p (p) over bar -> Z + jet)/sigma(p (p) over bar -> Z + b jet) for the associated production of a Z boson with at least one charm or bottom quark jet. Jets have transverse momentum p(T)(jet) > 20 GeV and pseudorapidity vertical bar eta(jet)vertical bar < 2.5. These cross section ratios are measured differentially as a function of jet and Z boson transverse momenta, based on 9.7 fb(-1) of p<(p)over bar> collisions collected with the D0 detector at the Fermilab Tevatron Collider at root s = 1.96 TeV. The measurements show significant deviations from perturbative QCD calculations and predictions from various event generators.
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