Measurement of beauty production via non-prompt charm hadrons in p-Pb collisions at √sNN=5.02 TeV

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The production cross sections of D-0, D+, and Lambda(+)(c) hadrons originating from beauty-hadron decays (i.e. non-prompt) were measured for the first time at midrapidity in proton-lead (p-Pb) collisions at the center-of-mass energy per nucleon pair of root s(NN) = 5.02 TeV. Nuclear modification factors (R-pPb) of non-prompt D-0, D+, and Lambda(+)(c) are calculated as a function of the transverse momentum (p(T)) to investigate the modification of the momentum spectra measured in p-Pb collisions with respect to those measured in proton-proton (pp) collisions at the same energy. The R-pPb measurements are compatible with unity and with the measurements in the prompt charm sector, and do not show a significant p(T) dependence. The p(T)-integrated cross sections and p(T)-integrated R-pPb of non-prompt D-0 and D+ mesons are also computed by extrapolating the visible cross sections down to p(T) = 0. The non-prompt D-meson R-pPb integrated over p(T) is compatible with unity and with model calculations implementing modification of the parton distribution functions of nucleons bound in nuclei with respect to free nucleons. The non-prompt Lambda(+)(c)/D-0 and D+/D-0 production ratios are computed to investigate hadronisation mechanisms of beauty quarks into mesons and baryons. The measured ratios as a function of p(T) display a similar trend to that measured for charm hadrons in the same collision system.

키워드

Heavy Ion ExperimentsHeavy Quark ProductionQCDMATRIX-ELEMENTHELAC-ONIAGENERATOR
제목
Measurement of beauty production via non-prompt charm hadrons in p-Pb collisions at √sNN=5.02 TeV
저자
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DOI
10.1007/JHEP11(2024)148
발행일
2024-11-26
유형
Article
저널명
Journal of High Energy Physics
11