Observation of (B_S)^0 mesons and measurement of the (B_S)^0/B^+ yield ratio in PbPb collisions at √s_(NN) = 5.02 TeV
Articolo
Data di Pubblicazione:
2022
Abstract:
The B-s(0) and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb(-1). The mesons are reconstructed in the exclusive decay channels B-s(0) -> J/psi (mu(+)mu(-))phi(K+K-) and B+ -> J/psi(mu(+)mu(-))K+ in the transverse momentum range 7-50 GeV/c and absolute rapidity 0-2.4. The B-s(0) meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of B-s(0) and B+ is measured and compared to theoretical models that include quark recombination effects.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
LHC, CMS, Quark gluon plasma, Heavy flavor, B mesons, Hadronization
Elenco autori:
A. Tumasyan; W. Adam; F. Ambrogi; T. Bergauer; M. Dragicevic; J. Er??; A. Escalante Del Valle; R. Fr??hwirth; M. Jeitler; N. Krammer; L. Lechner; D. Liko; T. Madlener; I. Mikulec; F.M. Pitters; N. Rad; J. Schieck; R. Sch??fbeck; M. Spanring; S. Templ; W. Waltenberger; C.-E. Wulz; M. Zarucki; V. Chekhovsky; A. Litomin; V. Makarenko; J. Suarez Gonzalez; M.R. Darwish; E.A. De Wolf; D. Di Croce; X. Janssen; T. Kello; A. Lelek; M. Pieters; H. Rejeb Sfar; H. Van Haevermaet; P. Van Mechelen; S. Van Putte; N. Van Remortel; F. Blekman; E.S. Bols; S.S. Chhibra; J. D'Hondt; J. De Clercq; D. Lontkovskyi; S. Lowette; I. Marchesini; S. Moortgat; A. Morton; Q. Python; S. Tavernier; W. Van Doninck; P. Van Mulders; D. Beghin; B. Bilin; B. Clerbaux; G. De Lentdecker; B. Dorney; L. Favart; A. Grebenyuk; A.K. Kalsi; I. Makarenko; L. Moureaux; L. P??tr??; A. Popov; N. Postiau; E. Starling; L. Thomas; C. Vander Velde; P. Vanlaer; D. Vannerom; L. Wezenbeek; T. Cornelis; D. Dobur; M. Gruchala; I. Khvastunov; M. Niedziela; C. Roskas; K. Skovpen; M. Tytgat; W. Verbeke; B. Vermassen; M. Vit; G. Bruno; F. Bury; C. Caputo; P. David; C. Delaere; M. Delcourt; I.S. Donertas; A. Giammanco; V. Lemaitre; K. Mondal; J. Prisciandaro; A. Taliercio; M. Teklishyn; P. Vischia; S. Wuyckens; J. Zobec; G.A. Alves; C. Hensel; A. Moraes; W.L. Ald?? J??nior; E. Belchior Batista Das Chagas; H. Brandao Malbouisson; W. Carvalho; J. Chinellato; E. Coelho; E.M. Da Costa; G.G. Da Silveira; D. De Jesus Damiao; S. Fonseca De Souza; J. Martins; D. Matos Figueiredo; M. Medina Jaime; M. Melo De Almeida; C. Mora Herrera; L. Mundim; H. Nogima; P. Rebello Teles; L.J. Sanchez Rosas; A. Santoro; S.M. Silva Do Amaral; A. Sznajder; M. Thiel; E.J. Tonelli Manganote; F. Torres Da Silva De Araujo; A. Vilela Pereira; C.A. Bernardes; L. Calligaris; T.R. Fernandez Perez Tomei; E.M. Gregores; D.S. Lemos; P.G. Mercadante; S.F. Novaes; Sandra S. Padula; A. Aleksandrov; G. Antchev; I. Atanasov; R. Hadjiiska; P. Iaydjiev; M. Misheva; M. Rodozov; M. Shopova; G. Sultanov; M. Bonchev; A. Dimitrov; T. Ivanov; L. Litov; B. Pavlov; P. Petkov; A. Petrov; W. Fang; Q. Guo; H. Wang; L. Yuan; M. Ahmad; Z. Hu; Y. Wang; E. Chapon; G.M. Chen; H.S. Chen; M. Chen; A. Kapoor; D. Leggat; H. Liao; Z. Liu; R. Sharma; A. Spiezia; J. Tao; J. Thomas-wilsker; J. Wang; H. Zhang; S. Zhang; J. Zhao; A. Agapitos; Y. Ban; C. Chen; Q. Huang; A. Levin; Q. Li; M. Lu; X. Lyu; Y. Mao; S.J. Qian; D. Wang; Q. Wang; J. Xiao; Z. You; X. Gao; M. Xiao; C. Avila; A. Cabrera; C. Florez; J. Fraga; A. Sarkar; M.A. Segura Delgado; J. Jaramillo; J. Mejia Guisao; F. Ramirez; J.D. Ruiz Alvarez; C.A. Salazar Gonz??lez; N. Vanegas Arbelaez; D. Giljanovic; N. Godinovic; D. Lelas; I. Puljak; T. Sculac; Z. Antunovic; M. Kovac; V. Brigljevic; D. Ferencek; D. Majumder; M. Roguljic; A. Starodumov; T. Susa; M.W. Ather; A. Attikis; E. Erodotou; A. Ioannou; G. Kole; M. Kolosova; S. Konstantinou; G. Mavromanolakis; J. Mousa; C. Nicolaou; F. Ptochos; P.A. Razis; H. Rykaczewski; H. Saka; D. Tsiakkouri; M. Finger; M. Finger; A. Kveton; J. Tomsa; E. Ayala; E. Carrera Jarrin; S. Elgammal; A. Ellithi Kamel; A. Mohamed; M.A. Mahmoud; Y. Mohammed; S. Bhowmik; A. Carvalho Antunes De Oliveira; R.K. Dewanjee; K. Ehataht; M. Kadastik; M. Raidal; C. Veelken; P. Eerola; L. Forthomme; H. Kirschenmann; K. Osterberg; M. Voutilainen; E. Br??cken; F. Garcia; J. Havukainen; V. Karim??ki; M.S. Kim; R. Kinnunen; T. Lamp??n; K. Lassila-Perini; S. Laurila; S. Lehti; T. Lind??n; H. Siikonen; E. Tuominen; J. Tuominiemi; P. Luukka; T. Tuuva; C. Amendola; M. Besancon; F. Couderc; M. Dejardin; D. Denegri; J.L. Faure; F. Ferri; S. Ganjour; A. Givernaud; P. Gras; G. Hamel de Monchenault; P. Jarry; B. Lenzi; E. Locci; J. Malcles; J. Rander; A. Rosowsky; M.??. Sahin; A. Savoy-Navarro; M. Titov; G.B. Yu; S. Ahuja; F. Beaudette; M. Bonanomi; A. Buchot Perraguin; P. Busson; C. Charlot; O. Davignon; B. Diab; G. Falmagne; R. Granier de Cassagnac; A. Hakimi; I. Kucher; A. Lobanov; C. Martin Perez;
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