Measurement of D0, D+, D∗+ and Ds+ production in pp collisions at s=5.02TeV with ALICE

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2019, Vol.79 (5)
• Main Authors: Al-Turany, M., Aleksandrov, D., Andreou, D., Anguelov, V., Aphecetche, L., Bailhache, R., Bala, R., Baral, R. C., Barret, V., Basu, S., Batigne, G., Beltran, L. G. E., Berdnikov, Y., Bianchi, N., Biswas, S., Bombara, M., Camerini, P., Chakraborty, P., Chattopadhyay, S., Christakoglou, P., Cortese, P., Crkovská, J., Crochet, P., Damas, F. P. A., Dash, S., De Falco, A., Djuvsland, Ø., Ehlers, R. J., Furget, C., Garcia-Solis, E., Ghosh, S. K., Gorbunov, S., Greiner, L., Guernane, R., Guittiere, M., Harris, J. W., Hillemanns, H., Hippolyte, B., Hohlweger, B., Huang, C., Hussain, N., Jadlovsky, J., Jevons, O., Kalweit, A., Karavicheva, T., Khan, A. M., Kim, B., Kim, M., Kirsch, S., Kiselev, S., Kryshen, E., Kubera, A. M., Kushpil, S., Llope, W. J., Lupi, M., Mareš, J., Margagliotti, G. V., Margutti, J., Mastroserio, A., Mazzilli, M., Meninno, E., Mitu, C. M., Nystrand, J., Ohlson, A., Oskarsson, A., Pacik, V., Papikyan, V., Pareek, P., Petrovici, M., Poghosyan, M. G., Polichtchouk, B., Puranapanda, K., Raniwala, R., Reidt, F., Ren, X., Reshetin, A., Richter, M., Rokita, P. S., Roy, A., Rustamov, A., Ryabov, Y., Schiaua, C., Schicker, R., Sekihata, D., Sibiriak, Y., Snellings, R. J. M., Sumowidagdo, S., Taillepied, G., Tikhonov, A., Timmins, A. R., Trzcinski, T. P., Vergara Limón, S., Vodopyanov, A., Vorobyev, I., Vrláková, J., Weber, M., Xu, R., Yalcin, S., Yamakawa, K., Yokoyama, H.
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Elementary Particles; Hadrons; Heavy Ions; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Experimental Physics; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-019-6873-6

The measurements of the production of prompt D 0 , D + , D ∗ + , and D s + mesons in proton–proton (pp) collisions at s = 5.02 TeV with the ALICE detector at the Large Hadron Collider (LHC) are reported. D mesons were reconstructed at mid-rapidity ( | y | < 0.5 ) via their hadronic decay channels D 0 → K - π + , D + → K - π + π + , D ∗ + → D 0 π + → K - π + π + , D s + → ϕ π + → K + K - π + , and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0 < p T < 36 GeV / c for D 0 , 1 < p T < 36 GeV / c for D + and D ∗ + , and in 2 < p T < 24 GeV / c for D s + mesons. Thanks to the higher integrated luminosity, an analysis in finer p T bins with respect to the previous measurements at s = 7 TeV was performed, allowing for a more detailed description of the cross-section p T shape. The measured p T -differential production cross sections are compared to the results at s = 7  TeV and to four different perturbative QCD calculations. Its rapidity dependence is also tested combining the ALICE and LHCb measurements in pp collisions at s = 5.02 TeV . This measurement will allow for a more accurate determination of the nuclear modification factor in p–Pb and Pb–Pb collisions performed at the same nucleon–nucleon centre-of-mass energy.