Measurement of beauty production via non-prompt D-0 mesons in Pb-Pb collisions at root s(NN)=5.02 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU
et al (show 1008 more authors) (2022) Measurement of beauty production via non-prompt D-0 mesons in Pb-Pb collisions at root s(NN)=5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (12).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>The production of non-prompt D<jats:sup>0</jats:sup> mesons from beauty-hadron decays was measured at midrapidity (|<jats:italic>y</jats:italic>| <jats:italic>&lt;</jats:italic> 0<jats:italic>.</jats:italic>5) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 5<jats:italic>.</jats:italic>02 TeV with the ALICE experiment at the LHC. Their nuclear modification factor (<jats:italic>R</jats:italic><jats:sub>AA</jats:sub>), measured for the first time down to <jats:italic>p</jats:italic><jats:sub>T</jats:sub> = 1 GeV<jats:italic>/c</jats:italic> in the 0–10% and 30–50% centrality classes, indicates a significant suppression, up to a factor of about three, for <jats:italic>p</jats:italic><jats:sub>T</jats:sub><jats:italic>&gt;</jats:italic> 5 GeV<jats:italic>/c</jats:italic> 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<jats:sup>0</jats:sup>-meson <jats:italic>R</jats:italic><jats:sub>AA</jats:sub> is larger than unity for <jats:italic>p</jats:italic><jats:sub>T</jats:sub><jats:italic>&gt;</jats:italic> 4 GeV<jats:italic>/c</jats:italic> 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.</jats:p>

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments, Heavy Quark Production, Quark Gluon Plasma
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 May 2023 09:08
Last Modified: 05 May 2023 09:08
DOI: 10.1007/JHEP12(2022)126
Open Access URL: https://doi.org/10.1007/JHEP12(2022)126
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3170206