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Adeva, B.; Adlarson, P.; Aidala, C. A.; Artuso, M.; Atzeni, M.; Bedeschi, F.; Bediaga, I. B.; Bizzeti, A.; Blago, M. P.; Brown, J.; Byczynski, W.; Calabrese, R.; Carboni, G.; Cogneras, E.; Dall’Occo, E.; Denysenko, V.; Dieste Maronas, L.; Duk, V.; Durham, J. M.; Dutta, D.; Evans, T.; Fan, Y.; Ferreres Sole, S.; Firlej, M.; Franco Sevilla, M.; Frau, G.; Frei, C.; Galati, M. D.; Garcia Moreno, P.; Garcia Plana, B.; Gershon, T.; Goncerz, M.; Gong, G.; Graziani, G.; Gruberg Cazon, B. R.; Herd, J.; Heuel, J.; Hill, D.; Horswill, J.; Hou, Y.; Ivshin, K.; Jaimes Elles, S. J.; Jiang, X.; Kondybayeva, A.; Lazzaroni, M.; Li, K.; Li, P.-R.; Lopez Huertas, A.; Malinin, A.; Manzari, C. A.; Marconi, U.; Marks, J.; Materok, M.; McNulty, R.; Meyer Garcia, L.; Mödden, A.; Mohammed, R. A.; Mountain, R.; Murphy, C. H.; Murray, D.; Pappalardo, L. L.; Parkes, C.; Passaleva, G.; Qi, H. R.; Rachwal, B.; Ratnikov, F.; Raven, G.; Rodrigues, A. B.; Rollings, A.; Romanovskiy, V.; Ruiz Vidal, J.; Ryzhikov, A.; Santacesaria, R.; Santovetti, E.; Sarti, A.; Shang, Y.; Shears, T.; Shields, E. B.; Singla, M.; Skwarnicki, T.; Smeaton, J. G.; Smith, M.; Solovev, A.; Souza De Paula, B.; Spadaro Norella, E.; Sriskaran, V.; Sun, J.; Tuci, G.; Vazquez Gomez, R.; Wang, J.; Wang, Y.; Williams, R.; Witek, M.; Wu, J.; Xu, J.; Xu, Z.; Yang, D.; Zenaiev, O.; Zhelezov, A.; Zhou, X.
The European physical journal. C, Particles and fields, 06/2023, Letnik: 83, Številka: 6Journal Article
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 Te V protons colliding on a gaseous neon target at rest, corresponding to a nucleon–nucleon centre-of-mass energy of s NN = 68.5 Ge V . The sum of the D 0 and D ¯ 0 production cross-section in p Ne collisions in the centre-of-mass rapidity range y ⋆ ∈ - 2.29 , 0 is found to be σ D 0 y ⋆ ∈ - 2.29 , 0 = 48.2 ± 0.3 ± 4.5 μ b / nucleon where the first uncertainty is statistical and the second is systematic. The D 0 - D ¯ 0 production asymmetry is also evaluated and suggests a trend towards negative values at large negative y ⋆ . 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.
