Электронный каталог

Статья

Alimov, L.
Associated Production of J/*q and Direct Photon in the NRQCD and the ICEM Using the High-Energy Factorization / L.Alimov, A.Karpishkov, V.Saleev. – Text : electronic // International Journal of Modern Physics A. – 2025. – Vol. 40, No. 15. – P. 2550020. – URL: https://doi.org/10.1142/S0217751X25500204. – Bibliogr.: 45.

We study the associated J ∕ ψ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark–antiquark pair into a heavy quarkonium, namely the nonrelativistic quantum chromodynamics (NRQCD) and the improved color evaporation model (ICEM). We find essential differences in the predictions for cross-sections and transverse momenta spectra obtained using the NRQCD and the ICEM, which can be used to discriminate between these models. Our prediction for cross-sections of the associated J ∕ ψ and direct photon production at the LHC energies slightly overestimates the results obtained earlier in the next-to-leading order (NLO) calculation in the collinear parton model (CPM). We predict different two-particle correlation spectra in the associated J ∕ ψ and direct photon production, which may be of interest for experimental study.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 323.5г - Масштабная инвариантность. Партонная модель
Спец.(статьи,препринты) = С 324.1д - Квантовая хромодинамика$
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
Бюллетени = 28/025