Measurement Of The Ratio Of Inclusive Cross Sections Sigma(P(P)Over-Bar) -> Z+2b Jets/Sigma(P((P)Over-Bar) -> Z+2 Jets) In P((P)Over-Bar) Collisions At Root S=1.96 Tev V M Abazov , B Abbott , B S Acharya , M Adams , T Adams , G D Alexeev , G Alkhazov , A Alton , A Askew , S Atkins , K Augsten , C Avila , F Badaud , L Bagby , B Baldin , D V Bandurin , S Banerjee , E Barberis , P Baringer , J F Bartlett , U Bassler , V E Bazterra , A Bean , M Begalli , L Bellantoni , S B Beri , G Bernardi , R Bernhard , I Bertram , M Besancon , R Beuselinck , P C Bhat , Sudeep Bhatia , V Bhatnagar , G Blazey , S Blessing , K Bloom , A Boehnlein , D Boline , E E Boos , G Borissov , A Brandt , O Brandt , R Brock , A Bross , D N Brown , Jacob R Brown , X B Bu , M Buehler , V Buescher , V Bunichev , S Burdin , C P Buszello , E Camachoperez , B C K Casey , H Castillavaldez , S Caughron , S Chakrabarti , D Chakraborty , K M Chan , A Chandra , E Chapon , G Chen , S W Cho , S Choi , B Choudhary , S Cihangir , D Claes , J Clutter , M Cooke , W E Cooper , M Corcoran , F Couderc , Mc Cousinou , D Cutts , A Das , G Davies , S J De Jong , E De La Cruzburelo , F Deliot , R Demina , D Denisov , S P Denisov , S Desai , C Deterre , K Devaughan , H T Diehl , M Diesburg , P F Ding , A Dominguez , A K Dubey , L V Dudko , D Duggan , A Duperrin , S Dutt , A Dyshkant , M Eads , D Edmunds , J Ellison , V D Elvira , Y Enari , H Evans , V N Evdokimov , G Facini , Lei Feng , T Ferbel , F Fiedler , F Filthaut , W Fisher , H E Fisk , M Fortner , H Fox , S Fuess , A Garciabellido , J A Garciagonzalez , G A Garciaguerra , V Gavrilov , Wenhua Geng , C E Gerber , Y Gershtein , G Ginther , G Golovanov , P D Grannis , S Greder , H Greenlee , G Grenier , Ph Gris , Jf Grivaz , A Grohsjean , S Gruenendahl , M W Gruenewald , T Guillemin , G Gutierrez , P Gutierrez , J Haley , L Han , K Harder , A Harel , J M Hauptman , J Hays , T Head , T Hebbeker , D Hedin , H Hegab , A P Heinson , U Heintz , C Hensel , I Herediade La Cruz , K Herner , G Hesketh , M D Hildreth , R Hirosky , T Hoang , J D Hobbs , B Hoeneisen , John A Hogan , M Hohlfeld , I Howley , Z Hubacek , V Hynek , I Iashvili , Y Ilchenko , R Illingworth , A S Ito , S Jabeen , M Jaffre , A Jayasinghe , M S Jeong , R Jesik , Pengfei Jiang , K Johns , E A Johnson , M Johnson , A Jonckheere , P Jonsson , J B Joshi , A W Jung , A Juste , E Kajfasz , D Karmanov , P A Kasper , I Katsanos , R Kehoe , S Kermiche , N Khalatyan , A Khanov , A Kharchilava , Y N Kharzheev , I Kiselevich , J M Kohli , A V Kozelov , J Kraus , A Kumar , A Kupco , T Kurca , V A Kuzmin , S Lammers , G Landsberg , P Lebrun , H S Lee , Seung Woo Lee , W M Lee , X Lei , J Lellouch , Dongzhi Li , H Li , Li Li , Q Z Li , J K Lim , D Lincoln , J Linnemann , V V Lipaev , R Lipton , Huiwen Liu , Yi Liu , A Lobodenko , M Lokajicek , R Lopes De Sa , R Lunagarcia , A L Lyon , A K A Maciel , R Maganavillalba , S Malik , V L Malyshev , Y Maravin , J Martinezortega , R Mccarthy , C L Mcgivern , M M Meijer , A Melnitchouk , D Menezes , P G Mercadante , M Merkin , A Meyer , J Meyer , F Miconi , N K Mondal , M Mulhearn , E Nagy , M Naimuddin , M Narain , R Nayyar , H A Neal , J P Negret , P Neustroev , H T Nguyen , T Nunnemann , J Orduna , N Osman , J Osta , M Padilla , Amlan J Pal , N Parashar , V Parihar , S K Park , R Partridge , N Parua , A Patwa , B Penning , M Perfilov , Y Peters , K Petridis , G Petrillo , P Petroff , Ma Pleier , P L M Podestalerma , V M Podstavkov , A V Popov , M Prewitt , D Price , N Prokopenko , Ji Qian , Arnulf Quadt , B Quinn , M S Rangel , K Ranjan , P N Ratoff , I Razumov , P Renkel , I Rippbaudot , F Rizatdinova , M Rominsky , Alonzo H Ross , C Royon , P Rubinov , R Ruchti , G Sajot , P Salcido , A Sanchezhernandez , M P Sanders , A S Santos , G Savage , L Sawyer , T Scanlon , R D Schamberger , Y Scheglov , H Schellman , C Schwanenberger , R Schwienhorst , J Sekaric , H Severini , E Shabalina , V Shary , Savanna Shaw , A A Shchukin , R K Shivpuri , V Simak , P Skubic , P Slattery , D Smirnov , K J Smith , G R Snow , J Snow , S Snyder , S Soeldnerrembold , L Sonnenschein , K Soustruznik , J Stark , D A Stoyanova , M Strauss , L Suter , P Svoisky , M Titov , V V Tokmenin , Yt Tsai , D Tsybychev , B Tuchming , C Tully , L Uvarov , S Uvarov , S Uzunyan , R Van Kooten , W M Van Leeuwen , N Varelas , E W Varnes , I A Vasilyev , P Verdier , A Y Verkheev , L S Vertogradov , M Verzocchi , M Vesterinen , D Vilanova , P Vokac , H D Wahl , M H L S Wang , J Warchol , G Watts , M Wayne , J Weichert , L Weltyrieger , A White , D Wicke , M R J Williams , G W Wilson , M Wobisch , D R Wood , T R Wyatt , Y Xie , R Yamada , S Yang , T Yasuda , Y A Yatsunenko , Weilan Ye , Zhengqian Ye , H Yin , K Yip , S W Youn , J M Yu , J Zennamo , T G Zhao , Bing Zhou , Junjie Zhu , M Zielinski , D Zieminska , L Zivkovic PHYSICAL REVIEW D（2015）
摘要
We measure the ratio of cross sections, $\sigma(p\bar{p}\rightarrow Z+2~b~\text{jets})$/$\sigma(p\bar{p}\rightarrow Z+\text{2 jets})$, for associated production of a $Z$ boson with at least two jets with transverse momentum $p_T^{\rm jet} > 20$ GeV and pseudorapidity $|\eta^{\rm jet}| < 2.5$. This measurement uses data corresponding to an integrated luminosity of 9.7 fb$^{-1}$ collected by the \DO experiment in Run II of Fermilab's Tevatron \ppbar Collider at a center-of-mass energy of 1.96 TeV. The measured integrated ratio of $0.0236\pm0.0032\left(\mbox{stat}\right)\pm0.0035\left(\mbox{syst}\right)$ is in agreement with predictions from next-to-leading-order perturbative QCD and the Monte Carlo event generators {\sc pythia} and {\sc alpgen}.
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physical sciences, natural sciences
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