Sumit Basu
Postdoctoral Researcher
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
Author
Summary, in English
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.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2021
Language
English
Publication/Series
Physical Review Letters
Volume
127
Issue
27
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
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
Status
Published
ISBN/ISSN/Other
- ISSN: 1079-7114