Measurement of beauty production via non-prompt D0 mesons in Pb-Pb collisions at $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV
Measurement of beauty production via non-prompt D0 mesons in Pb-Pb collisions at $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV
复制标题
DOI：
10.1007/jhep12(2022)126
复制
发表时间：
2022-02
影响因子：
5.4
通讯作者：
Alice Collaboration
中科院分区：
文献类型：
--
作者：
Alice Collaboration
The production of non-prompt D 0 mesons from beauty-hadron decays was measured at midrapidity (| y|< 0. 5) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of= 5. 02 TeV with the ALICE experiment at the LHC. Their nuclear modification factor (R AA), measured for the first time down to p T= 1 GeV/c in the 0–10% and 30–50% centrality classes, indicates a significant suppression, up to a factor of about three, for p T> 5 GeV/c in the 0–10% central Pb-Pb collisions. The data are described by models that include both collisional and radiative processes in the calculation of beauty-quark energy loss in the quark-gluon plasma, and quark recombination in addition to fragmentation as a hadronisation mechanism. The ratio of the non-prompt to prompt D 0-meson R AA is larger than unity for p T> 4 GeV/c in the 0–10% central Pb-Pb collisions, as predicted by models in which beauty quarks lose less energy than charm quarks in the quark-gluon plasma because of their larger mass.
