5-12 July 2017
Venice, Italy
Europe/Zurich timezone
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D-meson and charmed-baryon measurements in pp and p--Pb collisions with ALICE at the LHC

6 Jul 2017, 11:45
Room Welles (Palazzo del Casinò)

Room Welles

Palazzo del Casinò

Parallel Talk QCD and Hadronic Physics QCD and hadronic physics


Annalisa De Caro (Universita e INFN, Salerno (IT))


Measurements of charmed-hadron production in pp collisions are important to test predictions from perturbative QCD and provide an essential baseline for the studies in A--A collisions. Measurements in p--A collisions also allow studies of possible modifications of the charmed-hadron yields due to cold nuclear matter effects. The study of charm production as a function of the multiplicity of charged particles can give insight into multi-parton interactions and into the interplay between hard and soft processes. The charmed baryon-to-meson ratio is sensitive to hadronisation mechanisms in pp and p--A collisions and it will offer a unique probe of the role of coalescence and predicted presence of diquark states in A--A collisions.

ALICE measures hadrons containing charm quarks in wide momentum and rapidity ranges in pp and p--A collisions. We will present the recent results for D0, D+, D∗+ and D+s mesons reconstructed via their hadronic decays at mid-rapidity in pp collisions at s√ = 5.02, 7, 8 and 13 TeV and in p--Pb collisions at sNN‾‾‾‾√=5.02 TeV, collected with the ALICE detector during the LHC Run-1 and Run-2. In particular, we will show the production cross section, nuclear modification factor, multiplicity-dependent studies and the charm production measurement down to pT = 0.
We will report the first measurement of the pT-differential cross section of the Λ+c baryon in pp collisions at s√=7 TeV, and in p--Pb collisions at sNN‾‾‾‾√=5.02 TeV through the full reconstruction of two of its hadronic decay channels and the partial reconstruction of one of its semileptonic decay channels. We will also show the pT-differential cross section times branching ratio of the Ξ0c baryon measured in the decay channel Ξ0c→e+Ξ−νe in pp collisions at s√=7 TeV. The results will be compared with theoretical model predictions.

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