Measurement of charm production at central rapidity in proton-proton collisions at $ \sqrt {s} = 2.76\;{\text{TeV}} $

Abstract

The p t-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D 0 , D + , and D * + in the rapidity range |y| < 0.5, and for transverse momentum 1 < p t < 12 GeV/c, were measured in proton-proton collisions at √ s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays

Measurement of D0-meson production in Pb-Pb and p-Pb collisions with the ALICE experiment at the LHC

“…For nearly massless fermions in QCD, there is an extra complication to reconcile chiral symmetry and lattice discretization; the Wilson fermion and the staggered fermion have been the standard ways to define light quarks on the lattice, while the domain-wall fermion and the overlap fermion recently proposed have more solid theoretical ground although the simulation costs are higher. For various applications of lattice-QCD simulations to the system at finite T and µ B , see a recent review [39].…”

“…The charm and beauty differential yields would then scale from pp to AA (or pA) proportionally to the Energy dependence of the total charm production cross section compared with pQCD expectations. In case of proton-nucleon (pA) or deuteron-nucleus (dA) collisions, the measured cross sections have been divided by the number of binary nucleon-nucleon collisions [39][40][41][42][44][45][46]. average number N coll of inelastic NN collisions (binary scaling):…”

Study of the angular correlation between heavy-flavour decay electrons and charged unidentified particles in pp and p-Pb collisions with ALICE

“…The ITS upgrade is expected to increase by a factor 3 the resolution of impact parameter measurements, which is crucial, among other thing, for measurements of D mesons via its hadronic decays as well as for the separation of electrons from charm and beauty hadron decays (see e. g. [51] and [80]). …”

“…Open heavy-flavour can be experimentally studied via several approaches: (a) reconstruction of D mesons via their hadronic decays [51,52] …”

“…The MB trigger requires at least one hit in either of the VZERO detectors or in the SPD, in coincidence with the presence of a LHC bunch crossing [51,80]. There are few techniques to define multiplicity classes in heavy-ion (and also in pp) collisions with ALICE.…”