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Aaij, R.; Amhis, Y.; Barsuk, S.; Borsato, M.; Kochebina, O.; Lefrançois, J.; Li, Y.; Machefert, F.; Manca, G.; Quagliani, R.; Robbe, P.; Schune, M-H.; Teklishyn, M.; Vallier, A.; Viaud, B.; Wormser, G.; Ajaltouni, Z.J.; Baalouch, M.; Cogneras, E.; Deschamps, O.; El Rifai, I.; Gazzoni, G.; Grabalosa Gándara, M.; Henrard, Pierre; Hoballah, M.; Kozeiha, M.; Lefèvre, R.; Maratas, J.; Monteil, S.; Niess, V.; Perret, P.; Beaucourt, L.; Chefdeville, M.; Decamp, D.; Déléage, N.; Ghez, P.; Lees, J.P.; Marchand, J.F.; Minard, M.N.; Pietrzyk, B.; Qian, W.; t'Jampens, S.; Tisserand, V.; Tournefier, E.; Akar, S.; Aslanides, E.; Cogan, J.; Bruyn, K. De; Kanso, W.; Legac, R.; Leroy, O.; Mancinelli, G.; Martin, M.; Mordà, A.; Serrano, J.; Tayduganov, A.; Tsaregorodtsev, A.
The journal of high energy physics, 03/2016, Letnik: 3Journal Article
Production cross-sections of prompt charm mesons are measured with the first data from $pp$ collisions at the LHC at a centre-of-mass energy of $13\,\mathrm{TeV}$. The data sample corresponds to an integrated luminosity of $4.98 \pm 0.19\,\mathrm{pb}^{-1}$ 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, $p_{\mathrm{T}}$, and rapidity, $y$, and cover the range $0 < p_{\mathrm{T}} < 15\,\mathrm{GeV}/c$ and $2.0 < y < 4.5$. The ratios of the integrated cross-sections between charm mesons agree with previously measured fragmentation fractions. The inclusive $c\overline{c}$ cross-section within the range of $0 < p_{\mathrm{T}} < 8\,\mathrm{GeV}/c$ is found to be \ \sigma(pp \to c\overline{c}X) = 2940 \pm 3 \pm 180 \pm 160\,\mu\mathrm{b} \ where the uncertainties are due to statistical, systematic and fragmentation fraction uncertainties, respectively.
