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Measurement of the Cross Section of Xi(0)(c) and Xi(+)(c) Baryons and of the Branching-Fraction Ratio BR (Xi(0)(c) impl Xi(-) e(+)V(c))/BR(Xi(0)(c) impl Xi(-)pi(+)) in pp Collisions at root s=13 TeV
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SYSNO ASEP 0552411 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of the Cross Section of Xi(0)(c) and Xi(+)(c) Baryons and of the Branching-Fraction Ratio BR (Xi(0)(c) impl Xi(-) e(+)V(c))/BR(Xi(0)(c) impl Xi(-)pi(+)) in pp Collisions at root s=13 TeV Author(s) Acharya, S. (IN)
Adamová, Dagmar (UJF-V) RID, ORCID, SAI
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Broz, M. (CZ)
Contreras, J. G. (CZ)
Herman, T. (CZ)
Horák, D. (CZ)
Isakov, Artem (UJF-V) ORCID, SAI
Kotliarov, Artem (UJF-V) ORCID, SAI
Křížek, Filip (UJF-V) RID, ORCID, SAI
Křížková Gajdošová, K. (CZ)
Kushpil, Svetlana (UJF-V) RID, ORCID, SAI
Lavička, R. (CZ)
Mareš, Jiří A. (FZU-D) RID, ORCID
Petráček, V. (CZ)
Torres, S. R. (CZ)
Trzeciak, B. A. (CZ)
Šafařík, K. (CZ)
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Závada, Petr (FZU-D) RID, ORCIDNumber of authors 1026 Article number 272001 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 127, DEC (2021)Number of pages 13 s. Publication form Print - P Language eng - English Country US - United States Keywords ALICE collaboration ; pp collisions ; cross sections Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics Subject RIV - cooperation Institute of Physics - Elementary Particles and High Energy Physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ II - 90104 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Open access Institutional support FZU-D - RVO:68378271 ; UJF-V - RVO:61389005 UT WOS 000754272800004 EID SCOPUS 85123443982 DOI 10.1103/PhysRevLett.127.272001 Annotation The p_{T}-differential cross sections of prompt charm-strange baryons Ξ_{c}^{0} and Ξ_{c}^{+} were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions at a center-of-mass energy sqrt[s]=13 TeV with the ALICE detector at the LHC. The Ξ_{c}^{0} baryon was reconstructed via both the semileptonic decay (Ξ^{-}e^{+}ν_{e}) and the hadronic decay (Ξ^{-}π^{+}) channels. The Ξ_{c}^{+} baryon was reconstructed via the hadronic decay (Ξ^{-}π^{+}π^{+}) channel. The branching-fraction ratio BR(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})/BR(Ξ_{c}^{0}→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 (p_{T}) dependence of the Ξ_{c}^{0}- and Ξ_{c}^{+}-baryon production relative to the D^{0} meson and to the Σ_{c}^{0,+,++}- and Λ_{c}^{+}-baryon production are reported. The baryon-to-meson ratio increases toward low p_{T} 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. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2022 Electronic address https://doi.org/10.1103/PhysRevLett.127.272001
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