Measurement of the Semileptonic Charge Asymmetry usingBs0→DsμXDecays

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

doi:10.1103/physrevlett.110.011801

Abstract

We present a measurement of the time-integrated flavor-specific semileptonic charge asymmetry in the decays of Bs0 mesons that have undergone flavor mixing, asls, using Bs0(B¯s0)→Ds∓μ±X decays, with Ds∓→ϕπ∓ and ϕ→K+K−, using 10.4 fb−1 of proton-antiproton collisions collected by the D0 detector during Run II at the Fermilab Tevatron Collider. A fit to the difference between the time-integrated Ds− and Ds+ mass distributions of the Bs0 and B¯s0 candidates yields the flavor-specific asymmetry asls=[−1.12±0.74(stat)±0.17(syst)]%, which is the most precise measurement and in agreement with the standard model prediction.Received 9 July 2012DOI:https://doi.org/10.1103/PhysRevLett.110.011801© 2013 American Physical Society

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