Электронный каталог

Статья

Tumasyan, A.
Measurement of the Dependence of the Hadron Production Fraction Ratios f&sub(s)/f&sub(u) and f&sub(d)/f&sub(u) on B Meson Kinematic Variables in Proton-Proton Collisions at *%s = 13  TeV / A.Tumasyan, S.Afanasiev, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, N.Krasnikov, M.Finger, M.Finger Jr., Z.Tsamalaidze, [CMS Collab.] // Physical Review Letters [Electronic resource]. – 2023. – Vol.131, No.12. – P. 121901. – URL: https://doi.org/10.1103/PhysRevLett.131.121901. – Bibliogr.: 35.

The dependence of the ratio between the B*0&sub(s) and B*+ hadron production fractions, f&sub(s)/f&sub(u), on the transverse momentum (p&sub(T)) and rapidity of the B mesons is studied using the decay channels B*0&sub(s) *> J/*q*f) and B*+ *> J/*qK*+. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6  fb*−*1. The f&sub(s)/f&sub(u) ratio is observed to depend on the B p&sub(T) and to be consistent with becoming asymptotically constant at large p&sub(T). No rapidity dependence is observed. The ratio of the 𝐵*0 to 𝐵*+ meson production fractions, f&sub(d)/f&sub(u), is also measured, for the first time in proton-proton collisions, using the 𝐵*0 *> J/*qK&sup(* 0) decay channel. The result is found to be within 1 standard deviation of unity and independent of p&sub(T) and rapidity, as expected from isospin invariance.



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
ОИЯИ = ОИЯИ (JINR)2023