Measurement of the production cross section of prompt Ξc0 baryons in p-Pb collisions at √sNN=5.02 TeV

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The transverse momentum ( p(T)) differential production cross section of the promptly produced charmstrange baryon Xi(0)(c) (and its charge conjugate <(Xi(0)(c))over bar>) is measured at midrapidity via its hadronic decay into pi(+)Xi(-) in p-Pb collisions at a centre-of-mass energy per nucleon-nucleon collision root s(NN) = 5.02 TeV with the ALICE detector at the LHC. The Xi(0)(c) nuclear modification factor ( R-pPb), calculated from the cross sections in pp and p-Pb collisions, is presented and compared with the RpPb of Lambda(+)(c) baryons. The ratios between the p(T)-differential production cross section of Xi(0)(c) baryons and those of D-0 mesons and Lambda(+)(c) baryons are also reported and compared with results at forward and backward rapidity from the LHCb Collaboration. Themeasurements of the production cross section of prompt Xi(0)(c) baryons are compared with a model based on perturbative QCD calculations of charm-quark production cross sections, which includes only cold nuclear matter effects in p-Pb collisions, and underestimates the measurement by a factor of about 50. This discrepancy is reduced when the data is compared with a model that includes string formation beyond leading-colour approximation or in which hadronisation is implemented via quark coalescence. The p(T)-integrated cross section of prompt Xi(0)(c)-baryon production at midrapidity extrapolated down to p(T) = 0 is also reported. These measurements offer insights and constraints for theoretical calculations of the hadronisation process. Additionally, they provide inputs for the calculation of the charm production cross section in p-Pb collisions at midrapidity.

키워드

PROTON-PROTONMULTIPLICITY DEPENDENCEMESON PRODUCTIONROOT-S=7HADRONIZATIONRAPIDITYHADRONSQUARKSRATIO
제목
Measurement of the production cross section of prompt Ξc0 baryons in p-Pb collisions at √sNN=5.02 TeV
저자
Acharya, S.Adamova, D.Agarwal, A.Rinella, G. AglieriAglietta, L.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahn, S. U.Ahuja, I.Akindinov, A.Akishina, V.Al-Turany, M.Aleksandrov, D.Alessandro, B.Alfanda, H. M.Alfaro Molina, R.Ali, B.Alici, A.Alizadehvandchali, N.Alkin, A.Alme, J.Alocco, G.Alt, T.Altamura, A. R.Altsybeev, I.Alvarado, J. R.Alvarez, C. O. R.Anaam, M. N.Andrei, C.Andreou, N.Andronic, A.Andronov, E.Anguelov, V.Antinori, F.Antonioli, P.Apadula, N.Aphecetche, L.Appelshaeuser, H.Arata, C.Arcelli, S.Aresti, M.Arnaldi, R.Arneiro, J. G. M. C. A.Arsene, I. C.Arslandok, M.Augustinus, A.Averbeck, R.Averyanov, D.Azmi, M. D.Baba, H.Badala, A.Bae, J.Baek, Y. W.Bai, X.Bailhache, R.Bailung, Y.Bala, R.Balbino, A.Baldisseri, A.Balis, B.Banerjee, D.Banoo, Z.Barbasova, V.Barile, F.Barioglio, L.Barlou, M.Barman, B.Barnafoldi, G. G.Barnby, L. S.Barreau, E.Barret, V.Barreto, L.Bartels, C.Barth, K.Bartsch, E.Bastid, N.Basu, S.Batigne, G.Battistini, D.Batyunya, B.Bauri, D.Bazo Alba, J. 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DOI
10.1140/epjc/s10052-024-13531-w
발행일
2025-01
유형
Article
저널명
European Physical Journal C
85
1