The production yields of non-prompt D+smesons, namely D+smesons 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=5.02TeVwith the ALICE experiment at the LHC. The D+smesons and their charge conjugates were reconstructed from the hadronic decay channel D+s→φπ+, with φ→K−K+, in the 4 <36GeV/cand 2 <24GeV/cintervals for the 0–10% and 30–50% centrality classes, respectively. The measured yields of non-prompt D+smesons are compared to those of prompt D+sand non-prompt D0mesons by calculating the ratios of the production yields in Pb–Pb collisions and the nuclear modification factor RAA. The ratio between the RAAof non-prompt D+sand prompt D+smesons, and that between the RAAof non-prompt D+sand non-prompt D0mesons in central Pb–Pb collisions are found to be on average higher than unity in the 4 <12GeV/cinterval with a statistical significance of about 1.6 σand 1.7 σ, respectively. The measured RAAratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.

Measurement of beauty-strange meson production in Pb–Pb collisions at sNN=5.02TeV via non-prompt Ds + mesons / Acharya, S., Adamova, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Ahuja, I., Akindinov, A., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., Ali, Y., Alici, A., Alizadehvandchali, N., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 846:(2023). [10.1016/j.physletb.2022.137561]

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

Bruno G. E.;Colella D.;
2023

Abstract

The production yields of non-prompt D+smesons, namely D+smesons 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=5.02TeVwith the ALICE experiment at the LHC. The D+smesons and their charge conjugates were reconstructed from the hadronic decay channel D+s→φπ+, with φ→K−K+, in the 4 <36GeV/cand 2 <24GeV/cintervals for the 0–10% and 30–50% centrality classes, respectively. The measured yields of non-prompt D+smesons are compared to those of prompt D+sand non-prompt D0mesons by calculating the ratios of the production yields in Pb–Pb collisions and the nuclear modification factor RAA. The ratio between the RAAof non-prompt D+sand prompt D+smesons, and that between the RAAof non-prompt D+sand non-prompt D0mesons in central Pb–Pb collisions are found to be on average higher than unity in the 4 <12GeV/cinterval with a statistical significance of about 1.6 σand 1.7 σ, respectively. The measured RAAratios are compared with the predictions of theoretical models of heavy-quark transport in a hydrodynamically expanding QGP that incorporate hadronisation via quark recombination.
2023
Measurement of beauty-strange meson production in Pb–Pb collisions at sNN=5.02TeV via non-prompt Ds + mesons / Acharya, S., Adamova, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Ahuja, I., Akindinov, A., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., Ali, Y., Alici, A., Alizadehvandchali, N., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 846:(2023). [10.1016/j.physletb.2022.137561]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/262926
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