Электронный каталог

Статья

Friesen, A.
Mesons in Nonlocal Model with Four-Dimensional Separable Kernel / A.Friesen, Yu.Kalinovsky, A.Khmelev. – Text : electronic // The European Physical Journal A. – 2026. – Vol. 62, No. 1. – P. 6. – URL: https://doi.org/10.1140/epja/s10050-025-01772-6. – Bibliogr.: 42.

In this work we study the meson properties in the framework of an effective quark model. We start from the Bethe-Salpeter equation choosing the interaction kernel in nonlocal form with the Gaussian meson vertex function, characterized by a meson size parameter *L&sub(H) . We demonstrate the model’s predictive power by applying it to both light and heavy systems. Key results include a calculation of the *p*0 *>*g*g decay width and the pion transition form factor F&sub(*p,*g)(Q*2) , which reproduces experimental data from low to high . We further predict the electromagnetic properties of heavy quarkonia, obtaining the two-photon decay widths of J/*q and *G, and the radiative decay widths of and , all of which show consistency with available data and other theoretical approaches. The model provides a computationally efficient and unified framework for describing mesons from the light to heavy quark sectors.



ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 323.5а - Жесткие инклюзивные процессы. Глубоко-неупругое рассеяние. Рождение массивных лептонных пар. Рождение адронов с большим поперечным импульсом
Спец.(статьи,препринты) = С 324.1б - Сильные взаимодействия. Электромагнитная структура частиц. Алгебра токов. Киральные теории. Теория Редже$