Электронный каталог

Статья

Hayrapetyan, A.
Bottom Quark Energy Loss and Hadronization with B*+ and B*0&sub(S) Nuclear Modification Factors Using pp and PbPb Collisions at *%s&sub(NN)=5.02 TeV / A.Hayrapetyan, S.Afanasiev, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, N.Krasnikov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, S.Polikarpov, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, Z.Tsamalaidze, [CMS Collab.]. – Text: electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 2. – P. 195. – URL: https://doi.org/10.1007/JHEP02(2025)195. – Bibliogr.: 89.

The production cross sections of B*0&sub(s) and B*+ mesons are reported in proton-proton (pp) collisions recorded by the CMS experiment at the CERN LHC with a center-of-mass energy of 5.02 TeV. The data sample corresponds to an integrated luminosity of 302 pb&sup(−1) . The cross sections are based on measurements of the B*0&sub(s) → J/ψ(µ*+µ*−)ϕ(1020)(K*+K*−) and B*+ → J/ψ(µ*+µ*−)K*+ decay channels. Results are presented in the transverse momentum (p&sub(T)) range 7–50 GeV/c and the rapidity interval |y| < 2.4 for the B mesons. The measured pT-diferential cross sections of B*+ and B*0&sub(s) in pp collisions are well described by fxed-order plus next-to-leading logarithm perturbative quantum chromodynamics calculations. Using previous PbPb collision measurements at the same nucleon-nucleon center-of-mass energy, the nuclear modifcation factors, R&sub(AA), of the B mesons are determined. For p&sub(T) > 10 GeV/c, both mesons are found to be suppressed in PbPb collisions (with R&sub(AA) values signifcantly below unity), with less suppression observed for the B*0&sub(s) mesons. In this pT range, the RAA values for the B*+ mesons are consistent with those for inclusive charged hadrons and D*0 mesons. Below 10 GeV/c, both B*+ and B*0&sub(s) are found to be less suppressed than either inclusive charged hadrons or D*0 mesons, with the B*0&sub(s) R&sub(AA) value consistent with unity. The R&sub(AA) values found for the B*+ and B*0&sub(s) are compared to theoretical calculations, providing constraints on the mechanism of bottom quark energy loss and hadronization in the quark-gluon plasma, the hot and dense matter created in ultrarelativistic heavy ion collisions.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами