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Study of J/? meson production inside jets in pp collisions at s=8TeV

Abstract: A study of the production of prompt J/? mesons contained in jets in proton-proton collisions at ?s=8TeV is presented. The analysis is based on data corresponding to an integrated luminosity of 19.1 fb-1 collected with the CMS detector at the LHC. For events with at least one observed jet, the angular separation between the J/? meson and the jet is used to test whether the J/? meson is part of the jet. The analysis shows that most prompt J/? mesons having energy above 15 GeV and rapidity |y|<1 are contained in jets with pseudorapidity |?jet|<1. The differential distributions of the probability to have a J/? meson contained in a jet as a function of jet energy for a fixed J/? energy fraction are compared to a theoretical model using the fragmenting jet function approach. The data agree best with fragmenting jet function calculations that use a long-distance matrix element parameter set in which prompt J/? mesons are predicted to be unpolarized. This technique demonstrates a new way to test predictions for prompt J/? production using nonrelativistic quantum chromodynamics.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Physics Letters B 804 (2020) 135409

Editorial: Elsevier

 Fecha de publicación: 01/05/2020

Nº de páginas: 24

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.physletb.2020.135409

ISSN: 0370-2693,1873-2445

Url de la publicación: https://doi.org/10.1016/j.physletb.2020.135409