Title
Λc+ Production and Baryon-to-Meson Ratios in pp and p -Pb Collisions at sNN =5.02 TeV at the LHC
Date Issued
12 November 2021
Access level
open access
Resource Type
journal article
Author(s)
Acharya S.
Adamová D.
Adler A.
Adolfsson J.
Aglieri Rinella G.
Agnello M.
Agrawal N.
Ahammed Z.
Ahmad S.
Ahn S.U.
Akbar Z.
Akindinov A.
Al-Turany M.
Albuquerque D.S.D.
Aleksandrov D.
Alessandro B.
Alfanda H.M.
Alfaro Molina R.
Ali B.
Ali Y.
Alici A.
Alizadehvandchali N.
Alkin A.
Alme J.
Alt T.
Altenkamper L.
Altsybeev I.
Anaam M.N.
Andrei C.
Andreou D.
Andronic A.
Angeletti M.
Anguelov V.
Antičić T.
Antinori F.
Antonioli P.
Apadula N.
Aphecetche L.
Appelshäuser H.
Arcelli S.
Arnaldi R.
Arratia M.
Arsene I.C.
Arslandok M.
Augustinus A.
Averbeck R.
Aziz S.
Azmi M.D.
Badalà A.
Baek Y.W.
Bai X.
Bailhache R.
Bala R.
Balbino A.
Baldisseri A.
Ball M.
Banerjee D.
Barbera R.
Barioglio L.
Barlou M.
Barnaföldi G.G.
Barnby L.S.
Barret V.
Bartels C.
Barth K.
Bartsch E.
Baruffaldi F.
Bastid N.
Basu S.
Batigne G.
Batyunya B.
Bauri D.
Bearden I.G.
Beattie C.
Belikov I.
Bell Hechavarria A.D.C.
Bellini F.
Bellwied R.
Belokurova S.
Belyaev V.
Bencedi G.
Beole S.
Bercuci A.
Berdnikov Y.
Berdnikova A.
Berenyi D.
Bergmann L.
Besoiu M.G.
Betev L.
Bhaduri P.P.
Bhasin A.
Bhat I.R.
Bhat M.A.
Bhattacharjee B.
Bhattacharya P.
Bianchi A.
Bianchi L.
Bianchi N.
Bielčík J.
Bose Institute
Publisher(s)
American Physical Society
Abstract
The prompt production of the charm baryon Λc+ and the Λc+/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at sNN=5.02 TeV. These new measurements show a clear decrease of the Λc+/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<pT<12 GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/KS0. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e- and e-p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
Volume
127
Issue
20
Language
English
Scopus EID
2-s2.0-85119185893
PubMed ID
Source
Physical Review Letters
ISSN of the container
00319007
Sources of information:
Directorio de Producción Científica
Scopus