Multiplicity dependence of and production in pp collisions at TeV
  • Abualrob, I.J.
  • Acharya, S.
  • Aglieri, Rinella G.
  • Aglietta, L.
  • Agnello, M.
  • 외 1,038명
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초록

The first measurement at midrapidity (|y| < 0.5) of the production yield of the strange-charm baryons and as a function of transverse momentum (pT) in different charged-particle multiplicity classes in proton-proton collisions at TeV with the ALICE experiment at the LHC is reported. The baryon is reconstructed via the decay channel in the range 4 < pT< 12 GeV/c, while the baryon is reconstructed via both the and decay channels in the range 2 < pT< 12 GeV/c. The baryon-to-meson and the baryon-to-baryon production yield ratios show no significant dependence on multiplicity. In addition, the observed yield ratios are not described by theoretical predictions that model charm-quark fragmentation based on measurements at e+e− and e−p colliders, indicating differences in the charm-baryon production mechanism in pp collisions. A comparison with different event generators and tunings, including different modelling of the hadronisation process, is also discussed. Moreover, the branching-fraction ratio of is measured as 0.825 ± 0.094 (stat.) ± 0.081 (syst.). This value supersedes the previous ALICE measurement, improving the statistical precision by a factor of 1.6.

키워드

Charm PhysicsHadron-Hadron ScatteringProton-Proton Scattering
제목
Multiplicity dependence of and production in pp collisions at TeV
저자
Abualrob, I.J.Acharya, S.Aglieri, Rinella G.Aglietta, L.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahuja, I.Akbar, Z.U.L.Akindinov, A.Akishina, V.Al-Turany, M.Aleksandrov, D.Alessandro, B.Alfanda, H.M.Alfaro, Molina R.Ali, B.Alici, A.Alkin, A.Alme, J.Alocco, G.Alt, T.Altamura, A.R.Altsybeev, I.Andrei, C.Andreou, N.Andronic, A.Andronov, E.Anguelov, V.Antinori, F.Antonioli, P.Apadula, N.Appelshauser, H.Arcelli, S.Arnaldi, R.Arneiro, J.G.M.C.A.Arsene, I.C.Arslandok, M.Augustinus, A.Averbeck, R.Azmi, M.D.Baba, H.Babu, A.R.J.Badala, A.Bae, J.Bae, Y.Baek, Y.W.Bai, X.Bailhache, R.Bailung, Y.Bala, R.Baldisseri, A.Balis, B.Bangalia, S.Banoo, Z.Barbasova, V.Barile, F.Barioglio, L.Barlou, M.Barman, B.Barnafoldi, G.G.Barnby, L.S.Barreau, E.Barret, V.Barreto, L.Barth, K.Bartsch, E.Bastid, N.Batigne, G.Battistini, D.Batyunya, B.Bauri, D.Bazo, Alba J.L.Bearden, I.G.Becht, P.Behera, D.Behera, S.Belikov, I.Bella, V.D.Bellini, F.Bellwied, R.Beltran, L.G.E.Beltran, Y.A.V.Bencedi, G.Bensaoula, A.Beole, 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DOI
10.1007/JHEP12(2025)038
발행일
2025-11-12
유형
Article
저널명
Journal of High Energy Physics
2025
12