Электронный каталог

Статья

Didenko, A.
Amplitude Analysis of Di-Charmonium Resonances in Three Decay Channels / A.Didenko, L.Gladilin, I.Yeletskikh // Физика элементарных частиц и атомного ядра. Письма. – 2026. – Т. 23, № 5. – P. 488. – URL: https://www1.jinr.ru/Pepan_letters/panl_2026_5/27_Didenko_ann.pdf.

Two narrow resonant structures at 6.9 and 7.2 GeV, as well as a broad structure near the di-J/*q production threshold, have recently been observed by the LHCb, ATLAS, and CMS collaborations in the di-J/*q and J/*q + q(2S) invariant-mass spectra with four muons in the final state. This suggests the existence of fully heavy tetraquark candidates with a cccc quark configuration: X(6900), X(7200), and X(6500). However, their quantum properties have not been confirmed yet. This report presents an amplitude analysis for the di-J/*q and J/q + *q(2S) channels with 4*m and 4*m +2*p in final states, aimed at studying the properties of these exotic resonances. By performing a simultaneous fit to the mass and angular distributions, the masses and widths of the observed structures are determined under the hypothesis of two interfering states with J&sup(P) =0&sup(+) for both. The comparison with other spin-parity hypotheses for X(6900) is also presented



Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
ОИЯИ = ОИЯИ (JINR)2026