Электронный каталог

Статья

Acharya, S.
Measurement of Beauty Production via Non-Prompt Charm Hadrons in p-Pb Collisions at *%s&sub(NN)=5.02 TeV / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, A.Kuznetsov, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Journal of High Energy Physics [Electronic resource]. – 2024. – Vol. 2024, No. 11. – P. 148. – URL: https://doi.org/10.1007/JHEP11(2024)148. – Bibliogr.: 99.

The production cross sections of D*0, D*+, and Λ*+&sub(c) hadrons originating from beautyhadron decays (i.e. non-prompt) were measured for the first time at midrapidity in proton– lead (p–Pb) collisions at the center-of-mass energy per nucleon pair of √s&sub(NN) = 5.02 TeV. Nuclear modifcation factors (R&sub(pPb)) of non-prompt D*0, D*+, and Λ*+&sub(c) are calculated as a function of the transverse momentum (p&sub(T)) to investigate the modifcation of the momentum spectra measured in p–Pb collisions with respect to those measured in proton–proton (pp) collisions at the same energy. The R&sub(pPb) measurements are compatible with unity and with the measurements in the prompt charm sector, and do not show a signifcant p&sub(T) dependence. The p&sub(T)-integrated cross sections and p&sub(T)-integrated R&sub(pPb) of non-prompt D*0 and D*+ mesons are also computed by extrapolating the visible cross sections down to p&sub(T)= 0. The non-prompt D-meson R&sub(pPb) integrated over p&sub(T) is compatible with unity and with model calculations implementing modifcation of the parton distribution functions of nucleons bound in nuclei with respect to free nucleons. The non-prompt Λ*+&sub(c)/D*0 and D*+/D*0 production ratios are computed to investigate hadronisation mechanisms of beauty quarks into mesons and baryons. The measured ratios as a function of p&sub(T) display a similar trend to that measured for charm hadrons in the same collision system.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
Спец.(статьи,препринты) = С 324.1д - Квантовая хромодинамика$