PT Journal
AU LHCb Collaboration (Aaij, Rea
   Jaimes Elles, SJ
   Jashal, BK
   Martinez-Vidal, F
   Oyanguren, A
   Rebollo De Miguel, M
   Remon Alepuz, C
   Ruiz Vidal, J
   Sanderswood, I
TI Open charm production and asymmetry in pNe collisions at √s_NN =68.5 GeV
SO European Physical Journal C
JI Eur. Phys. J. C
PY 2023
BP 541 - 11pp
VL 83
IS 6
DI 10.1140/epjc/s10052-023-11641-5
LA English
AB A measurement of D-0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D-0 mesons is studied with a beam of 2.5 TeV protons colliding on a gaseous neon target at rest, corresponding to a nucleon-nucleon centre-of-mass energy of root s(NN) = 68.5 GeV. The sum of the D-0 and (D-0) over bar production cross-section in pNe collisions in the centre-of-mass rapidity range y(star) is an element of[-2.29, 0] is found to be sigma(y star is an element of[-2.29, 0])(D0) = 48.2 +/- 0.3 +/- 4.5 μb/nucleon where the first uncertainty is statistical and the second is systematic. The D-0 – (D-0) over bar production asymmetry is also evaluated and suggests a trend towards negative values at large negative y(star). The considered models do not account precisely for all the features observed in the LHCb data, but theoretical predictions including 1% intrinsic charm and 10% recombination contributions better describe the data than the other models considered.
ER