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Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV

The production rate of $\Lambda_{b}^{0}$ baryons relative to $B^{0}$ mesons in $pp$ collisions at a center-of-mass energy $\sqrt{s} = 13$ TeV is measured by the LHCb experiment. The ratio of $\Lambda_{b}^{0}$ to $B^{0}$ production cross-sections shows a significant dependence on both the transverse...

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Autor principal: LHCb Collaboration
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:http://cds.cern.ch/record/2877050
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author LHCb Collaboration
author_facet LHCb Collaboration
author_sort LHCb Collaboration
collection CERN
description The production rate of $\Lambda_{b}^{0}$ baryons relative to $B^{0}$ mesons in $pp$ collisions at a center-of-mass energy $\sqrt{s} = 13$ TeV is measured by the LHCb experiment. The ratio of $\Lambda_{b}^{0}$ to $B^{0}$ production cross-sections shows a significant dependence on both the transverse momentum and the measured charged-particle multiplicity. At low multiplicity, the ratio measured at LHCb is consistent with the value measured in $e^{+}e^{-}$ collisions, and increases by a factor of $\sim2$ with increasing multiplicity. At relatively low transverse momentum, the ratio of $\Lambda_{b}^{0}$ to $B^{0}$ cross-sections is higher than what is measured in $e^{+}e^{-}$ collisions, but converges with the $e^{+}e^{-}$ ratio as the momentum increases. These results imply that the evolution of heavy $b$ quarks into final-state hadrons is influenced by the density of the hadronic environment produced in the collision. Comparisons with a statistical hadronization model and implications for the mechanisms enforcing quark confinement are discussed.
id cern-2877050
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2023
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spelling cern-28770502023-10-26T19:54:41Zhttp://cds.cern.ch/record/2877050engLHCb CollaborationEnhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeVParticle Physics - ExperimentThe production rate of $\Lambda_{b}^{0}$ baryons relative to $B^{0}$ mesons in $pp$ collisions at a center-of-mass energy $\sqrt{s} = 13$ TeV is measured by the LHCb experiment. The ratio of $\Lambda_{b}^{0}$ to $B^{0}$ production cross-sections shows a significant dependence on both the transverse momentum and the measured charged-particle multiplicity. At low multiplicity, the ratio measured at LHCb is consistent with the value measured in $e^{+}e^{-}$ collisions, and increases by a factor of $\sim2$ with increasing multiplicity. At relatively low transverse momentum, the ratio of $\Lambda_{b}^{0}$ to $B^{0}$ cross-sections is higher than what is measured in $e^{+}e^{-}$ collisions, but converges with the $e^{+}e^{-}$ ratio as the momentum increases. These results imply that the evolution of heavy $b$ quarks into final-state hadrons is influenced by the density of the hadronic environment produced in the collision. Comparisons with a statistical hadronization model and implications for the mechanisms enforcing quark confinement are discussed.CERN-EP-2023-208LHCB-PAPER-2023-027oai:cds.cern.ch:28770502023-10-26
spellingShingle Particle Physics - Experiment
LHCb Collaboration
Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title_full Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title_fullStr Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title_full_unstemmed Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title_short Enhanced production of $\Lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13TeV
title_sort enhanced production of $\lambda_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}$ = 13tev
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2877050
work_keys_str_mv AT lhcbcollaboration enhancedproductionoflambdab0baryonsinhighmultiplicityppcollisionsatsqrts13tev