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

Acharya, S. ; Basu, S. LU orcid ; Christiansen, P. LU ; Hansen, J. LU ; Iversen, K.E. LU orcid ; Matonoha, O. LU ; Nassirpour, A.F. LU orcid ; Nepeivoda, R. LU orcid ; Ohlson, A. LU and Silvermyr, D. LU orcid , et al. (2023) In Physical Review D 108(11).
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 dσb¯b/dy||y|<0.5=83.1±3.5(stat)±5.4(syst)+12.3−3.2(extrap)  μb. The baryon-to-meson ratios are computed to investigate the hadronization mechanism of beauty quarks. The nonprompt... (More)
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 dσb¯b/dy||y|<0.5=83.1±3.5(stat)±5.4(syst)+12.3−3.2(extrap)  μb. 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/K0S 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. (Less)
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type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
108
issue
11
article number
112003
publisher
American Physical Society
external identifiers
  • scopus:85181679313
ISSN
2470-0010
DOI
10.1103/PhysRevD.108.112003
language
English
LU publication?
yes
id
d79f8549-1f44-43b1-b27c-3e66423dc1de
date added to LUP
2024-03-04 14:38:12
date last changed
2024-03-04 14:38:12
@article{d79f8549-1f44-43b1-b27c-3e66423dc1de,
  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|&lt;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 dσb¯b/dy||y|&lt;0.5=83.1±3.5(stat)±5.4(syst)+12.3−3.2(extrap)  μb. 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/K0S 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.}},
  author       = {{Acharya, S. and Basu, S. and Christiansen, P. and Hansen, J. and Iversen, K.E. and Matonoha, O. and Nassirpour, A.F. and Nepeivoda, R. and Ohlson, A. and Silvermyr, D. and Staa, J. and Vislavicius, V. and Zugravel, S.C. and Zurlo, N.}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at s =13 TeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.108.112003}},
  doi          = {{10.1103/PhysRevD.108.112003}},
  volume       = {{108}},
  year         = {{2023}},
}