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Adam, J.; Hamon, J.C.; Hippolyte, B.; Kuhn, C.; Maire, A.; Roy, C.; Schutz, Y.; Senyukov, S.; Barret, V.; Bastid, N.; Camejo, A. Batista; Crochet, P.; Dupieux, P.; Feuillard, V.J.G.; Lopez, X.; Manso, F.; Porteboeuf-Houssais, S.; Rosnet, P.; Aphecetche, Laurent; Audurier, B.; Batigne, Guillaume; Erazmus, B.; Francisco, A.; Germain, Marie; Martinez Garcia, Gines; Molnar, L.; Morreale, A.; Pillot, Philippe; Ronflette, L.; Shabetai, Alexandre; Stocco, Diego; Zhu, J.; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Teyssier, B.; Tieulent, R.; Uras, A.; Vernet, R.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Silvestre, C.; Vauthier, A.; Yokoyama, H.; Valle, Z. Conesa Del; Das, I.; Espagnon, B.; Hadjidakis, C.; Lakomov, I.; Suire, C.; Takaki, J. D. Tapia; Tarhini, M.; Palomo, L. Valencia
The European physical journal. C, Particles and fields, 08/2017, Letnik: 77, Številka: 8Journal Article
Two-particle angular correlations were measured in pp collisions at $\sqrt{s} = 7$ TeV. The analysis was carried out for pions, kaons, protons, and lambdas, for all particle/anti-particle combinations in the pair. Data for mesons exhibit an expected peak dominated by effects associated with mini-jets and are well reproduced by general purpose Monte Carlo generators. However, for baryon--baryon and anti-baryon--anti-baryon pairs, where both particles have the same baryon number, a near-side anti-correlation structure is observed instead of a peak. This effect is interpreted in the context of baryon production mechanisms in the fragmentation process. It currently presents a challenge to Monte Carlo models and its origin remains an open question.
