Measurement of the Cross Sections of Ξc0 and Ξc+ Baryons and of the Branching-Fraction Ratio BR (Ξc0 → Ξ-e+νe)/BR (Ξc0 → Ξ-π+) in pp Collisions at s =13 TeV
(2021) In Physical Review Letters 127(27).- Abstract
- The pT-differential cross sections of prompt charm-strange baryons Ξc0 and Ξc+ were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions at a center-of-mass energy s=13 TeV with the ALICE detector at the LHC. The Ξc0 baryon was reconstructed via both the semileptonic decay (Ξ-e+νe) and the hadronic decay (Ξ-π+) channels. The Ξc+ baryon was reconstructed via the hadronic decay (Ξ-π+π+) channel. The branching-fraction ratio BR(Ξc0→Ξ-e+νe)/BR(Ξc0→Ξ-π+)=1.38±0.14(stat)±0.22(syst) was measured with a total uncertainty reduced by a factor of about 3 with respect to the current world average reported by the Particle Data Group. The transverse momentum (pT) dependence of the Ξc0- and Ξc+-baryon production relative to the D0 meson... (More)
- The pT-differential cross sections of prompt charm-strange baryons Ξc0 and Ξc+ were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions at a center-of-mass energy s=13 TeV with the ALICE detector at the LHC. The Ξc0 baryon was reconstructed via both the semileptonic decay (Ξ-e+νe) and the hadronic decay (Ξ-π+) channels. The Ξc+ baryon was reconstructed via the hadronic decay (Ξ-π+π+) channel. The branching-fraction ratio BR(Ξc0→Ξ-e+νe)/BR(Ξc0→Ξ-π+)=1.38±0.14(stat)±0.22(syst) was measured with a total uncertainty reduced by a factor of about 3 with respect to the current world average reported by the Particle Data Group. The transverse momentum (pT) dependence of the Ξc0- and Ξc+-baryon production relative to the D0 meson and to the ςc0,+,++- and Λc+-baryon production are reported. The baryon-to-meson ratio increases toward low pT up to a value of approximately 0.3. The measurements are compared with various models that take different hadronization mechanisms into consideration. The results provide stringent constraints to these theoretical calculations and additional evidence that different processes are involved in charm hadronization in electron-positron (e+e-) and hadronic collisions. (Less)
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- author collaboration
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bosons, Tellurium compounds, A-center, Branching fractions, Center-of-mass energies, Charm+, Differential cross-sections, Hadronic decays, Hadronization, Measurements of, Mid-rapidity, Proton proton collisions, article, baryon, calculation, human, meson, positron, theoretical study, uncertainty, Hadrons
- in
- Physical Review Letters
- volume
- 127
- issue
- 27
- article number
- 272001
- publisher
- American Physical Society
- external identifiers
-
- scopus:85123443982
- pmid:35061415
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.127.272001
- language
- English
- LU publication?
- yes
- id
- 6638e40f-1a36-412a-8990-ae38399a8b43
- date added to LUP
- 2022-02-21 13:55:15
- date last changed
- 2023-04-06 12:00:09
@article{6638e40f-1a36-412a-8990-ae38399a8b43, abstract = {{The pT-differential cross sections of prompt charm-strange baryons Ξc0 and Ξc+ were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions at a center-of-mass energy s=13 TeV with the ALICE detector at the LHC. The Ξc0 baryon was reconstructed via both the semileptonic decay (Ξ-e+νe) and the hadronic decay (Ξ-π+) channels. The Ξc+ baryon was reconstructed via the hadronic decay (Ξ-π+π+) channel. The branching-fraction ratio BR(Ξc0→Ξ-e+νe)/BR(Ξc0→Ξ-π+)=1.38±0.14(stat)±0.22(syst) was measured with a total uncertainty reduced by a factor of about 3 with respect to the current world average reported by the Particle Data Group. The transverse momentum (pT) dependence of the Ξc0- and Ξc+-baryon production relative to the D0 meson and to the ςc0,+,++- and Λc+-baryon production are reported. The baryon-to-meson ratio increases toward low pT up to a value of approximately 0.3. The measurements are compared with various models that take different hadronization mechanisms into consideration. The results provide stringent constraints to these theoretical calculations and additional evidence that different processes are involved in charm hadronization in electron-positron (e+e-) and hadronic collisions.}}, author = {{Acharya, S and Adolfsson, Jonatan and Basu, Sumit and Christiansen, Peter and Matonoha, Oliver and Nassirpour, Adrian and Ohlson, Alice and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Zurlo, N}}, issn = {{1079-7114}}, keywords = {{Bosons; Tellurium compounds; A-center; Branching fractions; Center-of-mass energies; Charm+; Differential cross-sections; Hadronic decays; Hadronization; Measurements of; Mid-rapidity; Proton proton collisions; article; baryon; calculation; human; meson; positron; theoretical study; uncertainty; Hadrons}}, language = {{eng}}, number = {{27}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Measurement of the Cross Sections of Ξc0 and Ξc+ Baryons and of the Branching-Fraction Ratio BR (Ξc0 → Ξ-e+νe)/BR (Ξc0 → Ξ-π+) in pp Collisions at s =13 TeV}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.127.272001}}, doi = {{10.1103/PhysRevLett.127.272001}}, volume = {{127}}, year = {{2021}}, }