Measurement of the differential [formula omitted]-jet cross section and the ratio [formula omitted] in [formula omitted] collisions at [formula omitted

V M Abazov ,B Tuchming,R Madar,A Chandra,V Shary,V Bunichev,I Howley,B Quinn,K Yip,V Parihar,M Hohlfeld,I Kiselevich,Y Peters,R Magaña-Villalba,D Denisov,A Pal,M Vesterinen,R Illingworth,D Karmanov,Y Ilchenko,R Jesik,T Yasuda,B Penning,E De La Cruz-Burelo,J Hays,T Nunnemann,C Schwanenberger,K Herner,S Caughron,E Kajfasz,W Ye,P Skubic,S Greder,A Jayasinghe,M Diesburg,S Fuess,D Smirnov,A Patwa,G Ginther,P Lebrun,G Alkhazov,S Atkins,M Jaffré,D Hedin,A Melnitchouk,W Geng,T Head,I Katsanos,T Scanlon,J Orduna,O Gogota,S Banerjee,S Cihangir,J Zennamo,J Clutter,E Johnson,M Prewitt,J Sekaric,M Cooke,S Uvarov,J Weichert,J Osta,G Grenier,N Parua,D Boline,G Sajot,F Miconi,M Fortner,N Khalatyan,J Lellouch,S Blessing,R Bernhard,J Ellison,M Buehler,J Snow,T Hoang,F Badaud,A Meyer,A Alton,G Golovanov,U Bassler,B Baldin,S Yang,P Rubinov,M Eads,M Rominsky,A Lobodenko,E Camacho-Pérez,N Osman,S Chakrabarti,J Martínez-Ortega,I Razumov,G Savage,J Warchol,R Yamada,V Hynek,L Bagby,H Schellman,A Bross,S Kermiche,A Boehnlein,D Menezes,P Svoisky,B Hoeneisen,M Borysova,K Devaughan,S Söldner-Rembold,D Vilanova,I Heredia-De La Cruz,P Neustroev,I Ripp-Baudot,R Partridge,A Jonckheere,L Bellantoni,D Edmunds,R Beuselinck,Y Scheglov,S Uzunyan,L Welty-Rieger,R Van Kooten,A Duperrin,V Šimák ,S Bhatia,A K.a Maciel ,M Narain,F Déliot,R Lopes De ,J P Negret ,N Varelas,I A Vasilyev ,E W Varnes ,G W Wilson ,T R Wyatt ,D Tsybychev,L Dudko ,Y Xie,A S Santos ,A Juste Rozas ,M Begalli,F Rizatdinova,J D Mansour ,J Haley,V V Tokmenin ,A A Shchukin ,A L Lyon ,K Bloom,K M Chan ,B S Acharya ,J A García-González ,R Lipton,R Ruchti,L Uvarov,M Mulhearn,G Blazey,R Luna-García ,W E Cooper ,L Li,Serguei Denisov ,P Vokáč ,J M Kohli ,V L Malyshev ,C P Buszello ,A Harel,L Suter,M Verzocchi,M Besançon,S Choi,M Wayne,M Savitskyi,D Price,H Li,M Hildreth ,N K Mondal ,A Sánchez-Hernández,J.-F Grivaz,V D Elvira ,J M Hogan ,R Hirosky,Ph Gris,Peng Jiang ,Han Liu ,S W Youn ,X B Bu ,Q.Z Li,F Filthaut,Andreas Werner Jung ,U Heintz,R Démina ,A Grohsjean,A Khanov,A García-Bellido ,H Severini,E Boos ,V E Bazterra ,M Strauss,J Linnemann,T Adams,A S Ito ,D V Bandurin ,D Li,A V Kozelov ,M Merkin,А В Попов ,M Zieliński ,J Kraus,P C Bhat ,K A Johns ,D Ziemińska ,N Prokopenko,S B Beri ,C Deterre,B C.k Casey ,A Ross,Feng Liu ,A Dominguez,Mark Richard James Williams ,J F Bartlett ,Y Gershtein,J Joshi,J Meyer,H Fox,G Watts,C L Mcgivern ,H Castilla‐Valdez ,G G Hesketh ,S.K Park,B Abbott,D Lincoln,A Brandt,J P Agnew ,J Zhu,A Dubey,P Jönsson ,Y A Yatsunenko ,M Corcoran,R Brock,Arun Kumar ,T Zhao ,L Sonnenschein,T Ferbel,M Johnson,E Barberis,A Askew,Michael Wang ,G Gutiérrez ,W.M Lee,C Ávila ,H Hegab,M R Adams ,P Baringer,J Stark,S Snyder,W C Fisher ,D Wood ,T Kurča,K Augsten,E Shabalina,G D Alexeev ,C E Gerber ,M Wobisch,N Parashar,R D Schamberger ,C Tully,Y T Tsai ,D R Claes ,G Davies,K Soustružnı́k ,F Fiedler,J L Holzbauer ,Y Liu,V Buescher,H Nguyen ,M Grünewald ,S Dutt,O Brandt,J Qian,H A Neal ,M C Cousinou ,K Harder,S Burdin,Z Hubáček ,K Petridis,W M Van Leeuwen ,M Lokajı́ček ,Alexandre Fauré ,A Quadt,B C Choudhary ,H Greenlee,S Lammers,T Guillemin,S J De Jong ,R L Mccarthy ,Z Ye,P Pétroff,Y N Kharzheev ,H Liu,R Kehoe,A Kharchilava,G Chen,D Brown,C Royon,H Yin,M A Pleier ,P H Garbincius ,G R Snow ,H D Wahl ,Jaehoon Lim ,V M Podstavkov ,S.W Cho,M Perfilov,P G Mercadante ,A P Heinson ,R Nayyar,P Slattery,R Schwienhorst,V Gavrilov,H T Diehl ,M Titov,É Chapon ,D A Stoyanova ,H E Fisk ,M M Meijer ,A Kupčo ,J Yu ,E Nagy,H.S Lee,A Bean,F Couderc,V A Kuzmin ,V N Evdokimov ,B Zhou,S Desai,I Iashvili,A Y Verkheev ,L S Vertogradov ,L Sawyer,V Bhatnagar,Y Enari,I A Bertram ,P D Grannis ,S.W Lee,M P Sanders ,A Das,X Lei,S Malik,G Bernardi,H Evans,M S Jeong ,S Grünendahl,J Hobbs ,D Ćutts ,J M Hauptman ,S M Shaw ,V V Lipaev ,C Hensel,G Petrillo,T Hebbeker,P F Ding ,P N Ratoff ,S Jabeen,M Kaur,G Borissov,P Gutiérrez ,L Živković

doi:10.1016/j.physletb.2014.09.007

Abstract

We present the first measurements of the differential cross section dσ/dpTγ for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities |yγ|<1.0 and transverse momenta 30<pTγ<200 GeV. The b-quark jets are required to have pTjet>15 GeV and |yjet|<1.5. The ratio of differential production cross sections for γ+2b-jets to γ+b-jet as a function of pTγ is also presented. The results are based on the proton–antiproton collision data at s=1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The measured cross sections and their ratios are compared to the next-to-leading order perturbative QCD calculations as well as predictions based on the kT-factorization approach and those from the sherpa and pythia Monte Carlo event generators.

Highlights

We present the first measurements of the differential cross section dσ /dpγT for the production of an isolated photon in association with at least two b-quark jets
The measured cross sections and their ratios are compared to the next-to-leading order perturbative Quantum Chromodynamics (QCD) calculations as well as predictions based on the kT-factorization approach and those from the sherpa and pythia Monte
13 Visitor from: University of Maryland, College Park, Maryland 20742, USA. Photons produced in these interactions in association with one or more bottom (b)-quark jets provide an important test of perturbative Quantum Chromodynamics (QCD) predictions at large hard-scattering scales Q and over a wide range of parton momentum fractions

Summary

Contents lists available at ScienceDirect

We present the first measurements of the differential cross section dσ /dpγT for the production of an isolated photon in association with at least two b-quark jets. Visitor from: University of Maryland, College Park, Maryland 20742, USA. Photons produced in these interactions (called direct or prompt) in association with one or more bottom (b)-quark jets provide an important test of perturbative Quantum Chromodynamics (QCD) predictions at large hard-scattering scales Q and over a wide range of parton momentum fractions. This letter presents the first measurement of the cross section for associated production of an isolated photon with a bottom quark pair in p pcollisions. The large data sample and use of advanced photon and b-jet identification tools [11,12,13] enable us to measure the γ + 2 b-jet production cross section rapidities | yγ differentially as a function of pγT | < 1.0 and transverse momenta 30 for photons < pγT < 200 with GeV, while the b jets are required to have p jet T

GeV and

Findings

At higher p γ