The production yields of non-prompt D+ s mesons, namely D+ s mesons from beauty-hadron decays, were measured for the first time as a function of the transverse momentum (pT) at midrapidity (|y| < 0.5) in central and semi-central Pb–Pb collisions at a centre-of-mass energy per nucleon pair √ sNN =5.02 TeV with the ALICE experiment at the LHC. The D+ s mesons and their charge conjugates were reconstructed from the hadronic decay channel D+ s →φπ+, with φ→K−K+, in the 4 < pT <36 GeV/c and 2 < pT < 24 GeV/c intervals for the 0–10% and 30–50% centrality classes, respectively. The measured yields of non-prompt D+ s mesons are compared to those of prompt D+ s and non-prompt D0 mesons by calculating the ratios of the production yields in Pb–Pb collisions and the nuclear modification factor RAA. The ratio between the RAA of non-prompt D+ s and prompt D+ s mesons, and that between the RAA of non-prompt D+ s and non-prompt D0 mesons in central Pb–Pb collisions are found to be on average higher than unity in the 4 < pT <12 GeV/c interval with a statistical significance of about 1.6 σ and 1.7 σ, respectively. The measured RAA ratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.

Acharya, S., Adamová, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2023). Measurement of beauty-strange meson production in Pb–Pb collisions at √ sNN =5.02 TeV via non-prompt D+ s mesons. PHYSICS LETTERS. SECTION B, 846, 1-16 [10.1016/j.physletb.2022.137561].

Measurement of beauty-strange meson production in Pb–Pb collisions at √ sNN =5.02 TeV via non-prompt D+ s mesons

Agrawal, N.;Alici, A.;Arcelli, S.;Bellini, F.;Carnesecchi, F.;Cifarelli, L.;Colocci, M.;Ercolessi, F.;Giacalone, M.;Jacazio, N.;Rubini, N.;Scioli, G.;Strazzi, S.;
2023

Abstract

The production yields of non-prompt D+ s mesons, namely D+ s mesons from beauty-hadron decays, were measured for the first time as a function of the transverse momentum (pT) at midrapidity (|y| < 0.5) in central and semi-central Pb–Pb collisions at a centre-of-mass energy per nucleon pair √ sNN =5.02 TeV with the ALICE experiment at the LHC. The D+ s mesons and their charge conjugates were reconstructed from the hadronic decay channel D+ s →φπ+, with φ→K−K+, in the 4 < pT <36 GeV/c and 2 < pT < 24 GeV/c intervals for the 0–10% and 30–50% centrality classes, respectively. The measured yields of non-prompt D+ s mesons are compared to those of prompt D+ s and non-prompt D0 mesons by calculating the ratios of the production yields in Pb–Pb collisions and the nuclear modification factor RAA. The ratio between the RAA of non-prompt D+ s and prompt D+ s mesons, and that between the RAA of non-prompt D+ s and non-prompt D0 mesons in central Pb–Pb collisions are found to be on average higher than unity in the 4 < pT <12 GeV/c interval with a statistical significance of about 1.6 σ and 1.7 σ, respectively. The measured RAA ratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.
2023
Acharya, S., Adamová, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2023). Measurement of beauty-strange meson production in Pb–Pb collisions at √ sNN =5.02 TeV via non-prompt D+ s mesons. PHYSICS LETTERS. SECTION B, 846, 1-16 [10.1016/j.physletb.2022.137561].
Acharya, S.; Adamová, D.; Adler, A.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S.U.; Ahuja, I.; Akindinov, A.; Al-Tu...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/954516
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