Double J/ψ production in pion-nucleon scattering at COMPASS

0573103 - ÚPT 2024 RIV NL eng J - Journal Article
Alexeev, G. D. - Alexeev, M. G. - Amoroso, A. - Andrieux, V. - Anosov, V. - Augsten, K. - Augustyniak, W. - Azevedo, C. D. R. - Badelek, B. - Ball, M. - Barth, J. - Beck, R. - Bedfer, Y. - Bernhard, J. - Bodlák, M. - Bradamante, F. - Bressan, A. - Burtsev, V. E. - Chang, W.-C. - Chatterjee, C. - Chiosso, M. - Chumakov, A. G. - Chung, S. U. - Cicuttin, A. - Correia, P. M. M. - Crespo, M. L. - D'Ago, D. - Dalla Torre, S. - Dasgupta, S. S. - Dasgupta, S. - Srnka, Aleš … Total 194 authors
Double J/ψ production in pion-nucleon scattering at COMPASS.
Physics Letters. B. Roč. 838, 10 March (2023), č. článku 137702. ISSN 0370-2693. E-ISSN 1873-2445
Institutional support: RVO:68081731
Keywords : COMPASS * Charmonia production * Double J/ψ * Single parton scattering * Intrinsic charm
OECD category: Particles and field physics
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S0370269323000369

We present the study of the production of double J/ psi mesons using COMPASS data collected with a 190 GeV/c pi- beam scattering off NH3, Al and W targets. Kinematic distributions of the collected double J/ psi events are analysed, and the double J/ psi production cross section is estimated for each of the COMPASS targets. The NH3 results are compared to predictions from single-and double-parton scattering models as well as the pion intrinsic charm and the tetraquark exotic resonance hypotheses. It is demonstrated that the single parton scattering production mechanism gives the dominant contribution that is sufficient to describe the data. An upper limit on the double intrinsic charm content of the pion is evaluated. No significant signatures that could be associated with exotic tetraquarks are found in the double J/ psi mass spectrum.
Permanent Link: https://hdl.handle.net/11104/0345005