Measurements of prompt charm production cross-sections in pp collisions at √s=5TeV

作者：Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P. Alvarez; Alves, A. A., Jr.; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; Andreassi, G.; Andreotti, M.; Andrews, J. E.; Appleby, R. B.; Archilli, F.; d'Argent, P.; Romeu, J. Arnau; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Baalouch, M.; Babuschkin, I.; Bachmann, S.; Back, J. J.; Badalov, A.; Baesso, C.; Baker, S.; Baldini, W.

来源：The Journal of High Energy Physics, 2017, 2017(6): 147.

DOI：10.1007/JHEP06(2017)147

• Charm physics
• Forward physics
• Hadron-Hadron scattering (experiments)
• Heavy quark production
• QCD

Production cross-sections of prompt charm mesons are measured using data from pp collisions at the LHC at a centre-of-mass energy of 5TeV. The data sample corresponds to an integrated luminosity of 8 : 60 +/- 0 : 33 pb(-1) collected by the LHCb experiment. The production cross-sections of D-0, D+, D-s(+), and D*(+) mesons are measured in bins of charm meson transverse momentum, p(T), and rapidity, y. They cover the rapidity range 2 : 0 < y < 4 : 5 and transverse momentum ranges 0 < p(T) < 10 GeV/c for D-0 and D+ and 1 < p(T) < 10 GeV/c for D-s(+) and D*(+) mesons. The inclusive cross- sections for the four mesons, including charge-conjugate states, within the range of 1 < p(T) < 8 GeV/c are determined to be @@@ sigma (pp -> D-0 X) - 1004 +/- 3 +/- 54 mu b; @@@ sigma ( pp -> D+ X) = 402 +/- 2 +/- 30 mu b; @@@ sigma ( pp -> Ds+X) = 170 +/- 4 +/- 16 mu b; @@@ sigma ( pp -> D*(+) X) = 421 +/- 5 +/- 36 mu b; @@@ where the uncertainties are statistical and systematic, respectively.

• 出版日期2017-6-28
• 单位华中师范大学; 中国科学院大学; 清华大学