The production cross section of prompt A(c)(+) charm baryons was measured with the ALICE detector at the LHC at midrapidity in proton-proton (pp) and proton-lead (p-Pb) collisions at a center-of-mass energy per nucleon pair of root sNN = 5.02 TeV. The A(c)(+) and (A) over bar (-)(c)baryons were reconstructed in the hadronic decay channels A(c)(+)-> pK(-)st+ and A(c)(+)-> pK(S)(0) and respective charge conjugates. The measured differential cross sections as a function of transverse momentum (pT) and the pT-integrated A+c production cross section in pp and in p-Pb collisions are presented. The A(c)(+) nuclear modification factor (R-pPb), calculated from the cross sections in pp and in p-Pb collisions, is presented and compared with the R-pPb of D mesons. The A+c /D0 ratio is also presented and compared with the light-flavor baryon-to-meson ratios p/st and A/KS0, and measurements from other LHC experiments. The results are compared to predictions from model calculations and Monte Carlo event generators.

Lambdba_c^+ production in pp and in p-Pb collisions at sqrt{s_NN}=5.02 TeV

S. Beole;L. Bianchi;E. Botta;F. Catalano;A. Ferretti;M. Gagliardi;B. Lim;M. Masera;F. Mazzaschi;L. Quaglia;L. Terlizzi;E. Vercellin;
2021-01-01

Abstract

The production cross section of prompt A(c)(+) charm baryons was measured with the ALICE detector at the LHC at midrapidity in proton-proton (pp) and proton-lead (p-Pb) collisions at a center-of-mass energy per nucleon pair of root sNN = 5.02 TeV. The A(c)(+) and (A) over bar (-)(c)baryons were reconstructed in the hadronic decay channels A(c)(+)-> pK(-)st+ and A(c)(+)-> pK(S)(0) and respective charge conjugates. The measured differential cross sections as a function of transverse momentum (pT) and the pT-integrated A+c production cross section in pp and in p-Pb collisions are presented. The A(c)(+) nuclear modification factor (R-pPb), calculated from the cross sections in pp and in p-Pb collisions, is presented and compared with the R-pPb of D mesons. The A+c /D0 ratio is also presented and compared with the light-flavor baryon-to-meson ratios p/st and A/KS0, and measurements from other LHC experiments. The results are compared to predictions from model calculations and Monte Carlo event generators.
2021
104
5
054905-1
054905-26
https://journals.aps.org/prc/pdf/10.1103/PhysRevC.104.054905
proton nucleus collisions, heavy flavour
S. Acharya; D. Adamov??; A. Adler; J. Adolfsson; G. Aglieri Rinella; M. Agnello; N. Agrawal; Z. Ahammed; S. Ahmad; S. U. Ahn; Z. Akbar; A. Akindinov; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1882002
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