The production cross section of prompt +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 √sNN = 5.02 TeV. The +c and −c baryons were reconstructed in the hadronic decay channels +c → pK−π + and +c → pK0 S and respective charge conjugates. The measured differential cross sections as a function of transverse momentum (pT ) and the pT -integrated +c production cross section in pp and in p–Pb collisions are presented. The +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 +c /D0 ratio is also presented and compared with the light-flavor baryon-to-meson ratios p/π and /K0 S , and measurements from other LHC experiments. The results are compared to predictions from model calculations and Monte Carlo event generators.
Ʌ+c production in pp and in p-Pb collisions at √sNN = 5.02 TeV / Acharya, S., Adamová, D., Adler, A., Adolfsson, J., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S.U., Ahuja, I., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S.N., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., et al.. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 104:5(2021), pp. 1-26. [10.1103/PhysRevC.104.054905]
Ʌ+c production in pp and in p-Pb collisions at √sNN = 5.02 TeV
L. CunqueiroMembro del Collaboration Group
;
2021
Abstract
The production cross section of prompt +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 √sNN = 5.02 TeV. The +c and −c baryons were reconstructed in the hadronic decay channels +c → pK−π + and +c → pK0 S and respective charge conjugates. The measured differential cross sections as a function of transverse momentum (pT ) and the pT -integrated +c production cross section in pp and in p–Pb collisions are presented. The +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 +c /D0 ratio is also presented and compared with the light-flavor baryon-to-meson ratios p/π and /K0 S , and measurements from other LHC experiments. The results are compared to predictions from model calculations and Monte Carlo event generators.| File | Dimensione | Formato | |
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