Enhanced Production of Λ_{b}^{0} Baryons in High-Multiplicity pp Collisions at sqrt[s]=13 TeV
The production rate of Λ_{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 Λ_{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 ∼2 with increasing multiplicity. At relatively low transverse momentum, the ratio of Λ_{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 several models and implications for the mechanisms enforcing quark confinement are discussed.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:132 |
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| Enthalten in: |
Physical review letters - 132(2024), 8 vom: 23. Feb., Seite 081901 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Aaij, R [VerfasserIn] |
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Date Revised 08.03.2024 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1103/PhysRevLett.132.081901 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369474422 |
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| 500 | |a Date Revised 08.03.2024 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a The production rate of Λ_{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 Λ_{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 ∼2 with increasing multiplicity. At relatively low transverse momentum, the ratio of Λ_{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 several models and implications for the mechanisms enforcing quark confinement are discussed | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Abellan Beteta, C |e verfasserin |4 aut | |
| 700 | 1 | |a Abudinén, F |e verfasserin |4 aut | |
| 700 | 1 | |a Ackernley, T |e verfasserin |4 aut | |
| 700 | 1 | |a Adeva, B |e verfasserin |4 aut | |
| 700 | 1 | |a Adinolfi, M |e verfasserin |4 aut | |
| 700 | 1 | |a Adlarson, P |e verfasserin |4 aut | |
| 700 | 1 | |a Agapopoulou, C |e verfasserin |4 aut | |
| 700 | 1 | |a Aidala, C A |e verfasserin |4 aut | |
| 700 | 1 | |a Ajaltouni, Z |e verfasserin |4 aut | |
| 700 | 1 | |a Akar, S |e verfasserin |4 aut | |
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| 700 | 1 | |a Albicocco, P |e verfasserin |4 aut | |
| 700 | 1 | |a Albrecht, J |e verfasserin |4 aut | |
| 700 | 1 | |a Alessio, F |e verfasserin |4 aut | |
| 700 | 1 | |a Alexander, M |e verfasserin |4 aut | |
| 700 | 1 | |a Alfonso Albero, A |e verfasserin |4 aut | |
| 700 | 1 | |a Aliouche, Z |e verfasserin |4 aut | |
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| 700 | 1 | |a Amey, J L |e verfasserin |4 aut | |
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