Measurement of the Effective Weak Mixing Angle in pp¯→Z/γ*→ℓ+ℓ- Events

V. M. Abazov, B. Abbott,B. S. Acharya,M. Adams,T. Adams,J. P. Agnew, G. D. Alexeev, G. Alkhazov,A. Alton, A. Askew,S. Atkins, K. Augsten,V. Aushev,Y. Aushev,C. Avila,F. Badaud,L. Bagby, B. Baldin,D. V. Bandurin,S. Banerjee, E. Barberis, P. Baringer,J. F. Bartlett, U. Bassler,V. Bazterra,A. Bean, M. Begalli, L. Bellantoni, S. B. Beri,G. Bernardi, R. Bernhard,I. Bertram, M. Besançon, R. Beuselinck, P. C. Bhat,S. Bhatia,V. Bhatnagar, G. Blazey,S. Blessing,K. Bloom, A. Boehnlein,D. Boline, E. E. Boos,G. Borissov,M. Borysova,A. Brandt,O. Brandt, M. Brochmann,R. Brock,A. Bross,D. Brown,X. B. Bu,M. Buehler, V. Buescher,V. Bunichev,S. Burdin,C. P. Buszello,E. Camacho-Pérez,B. C. K. Casey, H. Castilla-Valdez, S. Caughron, S. Chakrabarti,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, M.-C. Cousinou, J. Cuth, D. Cutts,A. Das,G. Davies,S. J. de Jong,E. De La Cruz-Burelo,F. Déliot,R. Demina,D. Denisov, S. P. Denisov,S. Desai,C. Deterre,K. DeVaughan,H. T. Diehl, M. Diesburg,P. F. Ding,A. Dominguez, A. Drutskoy,A. Dubey,L. V. Dudko, A. Duperrin,S. Dutt, M. Eads, D. Edmunds, J. Ellison,V. D. Elvira, Y. Enari,H. Evans, A. Evdokimov, V. N. Evdokimov,A. Fauré,L. Feng,T. Ferbel,F. Fiedler, F. Filthaut,W. Fisher,H. E. Fisk, M. Fortner,H. Fox,J. Franc, S. Fuess,P. H. Garbincius,A. Garcia-Bellido,J. A. García-González, V. Gavrilov,W. Geng,C. E. Gerber, Y. Gershtein, G. Ginther,O. Gogota,G. Golovanov,P. D. Grannis,S. Greder, H. Greenlee, G. Grenier,Ph. Gris, J.-F. Grivaz, A. Grohsjean, S. Grünendahl,M. W. Grünewald,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. Heredia-De La Cruz, K. Herner,G. Hesketh,M. D. Hildreth, R. Hirosky,T. Hoang, J. D. Hobbs, B. Hoeneisen,J. Hogan,M. Hohlfeld,J. L. Holzbauer,I. Howley,Z. Hubacek, V. Hynek, I. Iashvili, Y. Ilchenko,R. Illingworth,A. S. Ito,S. Jabeen,M. Jaffré,A. Jayasinghe,M. S. Jeong, R. Jesik,P. Jiang,K. Johns,E. Johnson,M. Johnson,A. Jonckheere,P. Jonsson,J. Joshi, A. W. Jung,A. Juste, E. Kajfasz, D. Karmanov, I. Katsanos,M. Kaur, 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. Kurča,V. A. Kuzmin,S. Lammers, P. Lebrun,H. S. Lee,S. W. Lee,W. M. Lee,X. Lei,J. Lellouch,D. Li,H. Li,L. Li, Q. Z. Li,J. K. Lim,D. Lincoln,J. Linnemann,V. V. Lipaev, R. Lipton,H. Liu,Y. Liu, A. Lobodenko,M. Lokajicek,R. Lopes de Sa,R. Luna-Garcia, A. L. Lyon, A. K. A. Maciel,R. Madar,R. Magaña-Villalba, S. Malik,V. L. Malyshev,J. Mansour,J. Martínez-Ortega, 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. Narain, R. Nayyar,H. A. Neal,J. P. Negret, P. Neustroev,H. T. Nguyen, T. Nunnemann, J. Orduna,N. Osman,A. 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. Pétroff, M.-A. Pleier,V. M. Podstavkov,A. V. Popov,M. Prewitt,D. Price, N. Prokopenko, J. Qian, A. Quadt,B. Quinn,P. N. Ratoff,I. Razumov, I. Ripp-Baudot, F. Rizatdinova, M. Rominsky,A. Ross,C. Royon, P. Rubinov, R. Ruchti, G. Sajot,A. Sánchez-Hernández,M. P. Sanders,A. S. Santos, G. Savage,M. Savitskyi,L. Sawyer,T. Scanlon,R. D. Schamberger, Y. Scheglov,H. Schellman,M. Schott, C. Schwanenberger,R. Schwienhorst, J. Sekaric,H. Severini, E. Shabalina, V. Shary,S. Shaw,A. A. Shchukin,O. Shkola, V. Simak, P. Skubic, P. Slattery, G. R. Snow,J. Snow,S. Snyder,S. Söldner-Rembold, L. Sonnenschein, K. Soustruznik,J. Stark,N. Stefaniuk,D. A. Stoyanova, M. Strauss,L. Suter,P. Svoisky,M. Titov,V. V. Tokmenin,Y.-T. 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,A. Y. Verkheev,L. S. Vertogradov,M. Verzocchi,M. Vesterinen,D. Vilanova, P. Vokac,H. D. Wahl, C. Wang,M. H. L. S. Wang, J. Warchol,G. Watts, M. Wayne, J. Weichert,L. Welty-Rieger,M. R. J. Williams,G. W. Wilson, M. Wobisch,D. R. Wood,T. R. Wyatt,Y. Xiang,Y. Xie,R. Yamada,S. Yang,T. Yasuda,Y. A. Yatsunenko, W. Ye, Z. Ye, H. Yin,K. Yip,S. W. Youn,J. M. Yu, J. Zennamo,T. G. Zhao,B. Zhou,J. Zhu, M. Zielinski,D. Zieminska, L. Zivkovic

Physical Review Letters(2018)

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摘要
We present a measurement of the effective weak mixing angle parameter sin2θleff, in pp¯→Z/γ∗→μ+μ− events at a center of mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6 fb−1 of integrated luminosity. The measured value of sin2θleff[μμ]=0.23016±0.00064 is further combined with the result from the D0 measurement in pp¯→Z/γ∗→e+e− events, resulting in sin2θleff[comb.]=0.23095±0.00040. This combined result is the most precise measurement from a single experiment at a hadron collider and is the most precise determination using the coupling of the Z/γ∗ to light quarks.
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