The production cross sections of D0 and Λ+ c hadrons originating from beauty-hadron decays (i.e., nonprompt) were measured for the first time at midrapidity (|𝑦|<0.5) by the ALICE Collaboration in proton-proton collisions at a center-of-mass energy √𝑠=13  TeV. They are described within uncertainties by perturbative QCD calculations employing the fragmentation fractions of beauty quarks to baryons measured at forward rapidity by the LHCb Collaboration. The b⁢ ¯ b production cross section per unit of rapidity at midrapidity, estimated from these measurements, is d⁢𝜎b⁢ ¯ b /d⁢𝑦||𝑦|<0.5=83.1±3.5⁢(stat)±5.4⁢(syst)+12.3 −3.2⁢(extrap)  μ⁢b. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The nonprompt Λ+ c/D0 production ratio has a similar trend to the one measured for the promptly produced charmed particles and to the p/𝜋+ and Λ/K0 S ratios, suggesting a similar baryon-formation mechanism among light, strange, charm, and beauty hadrons. The 𝑝T -integrated nonprompt Λ+ c/D0 ratio is found to be significantly higher than the one measured in e+⁢e− collisions.

Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., et al. (2023). Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √𝑠=13  TeV. PHYSICAL REVIEW D, 108(11), 1-19 [10.1103/PhysRevD.108.112003].

Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √𝑠=13  TeV

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

Abstract

The production cross sections of D0 and Λ+ c hadrons originating from beauty-hadron decays (i.e., nonprompt) were measured for the first time at midrapidity (|𝑦|<0.5) by the ALICE Collaboration in proton-proton collisions at a center-of-mass energy √𝑠=13  TeV. They are described within uncertainties by perturbative QCD calculations employing the fragmentation fractions of beauty quarks to baryons measured at forward rapidity by the LHCb Collaboration. The b⁢ ¯ b production cross section per unit of rapidity at midrapidity, estimated from these measurements, is d⁢𝜎b⁢ ¯ b /d⁢𝑦||𝑦|<0.5=83.1±3.5⁢(stat)±5.4⁢(syst)+12.3 −3.2⁢(extrap)  μ⁢b. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The nonprompt Λ+ c/D0 production ratio has a similar trend to the one measured for the promptly produced charmed particles and to the p/𝜋+ and Λ/K0 S ratios, suggesting a similar baryon-formation mechanism among light, strange, charm, and beauty hadrons. The 𝑝T -integrated nonprompt Λ+ c/D0 ratio is found to be significantly higher than the one measured in e+⁢e− collisions.
2023
Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., et al. (2023). Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at √��=13  TeV. PHYSICAL REVIEW D, 108(11), 1-19 [10.1103/PhysRevD.108.112003].
Acharya, S.; Adamová, D.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I.; Akindinov, A.; Al-Turany, M.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/954525
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