Zobrazeno 1 - 10
of 4 567
pro vyhledávání: '"CHARMONIA"'
We present a classical model to study the formation of charmonia, as well as dissociation and regeneration processes of heavy-quark bound states in the quark gluon plasma using Langevin simulations. The charm and anticharm quarks are described as Bro
Externí odkaz:
http://arxiv.org/abs/2411.17417
Both hot QCD matter and extremely strong electromagnetic fields are generated in relativistic heavy-ion collisions. We employ the transport model and the equivalent photon approximation (EPA) to study charmonium hadroproduction and photoproduction in
Externí odkaz:
http://arxiv.org/abs/2411.12169
We compute the branching fractions of vector quarkonia ($V_Q=J/\psi, \psi', \Upsilon(nS)$) decays into neutrino pairs, considering both Dirac and Majorana types, within the Standard Model (SM) and beyond. The vector nature of quarkonium states yields
Externí odkaz:
http://arxiv.org/abs/2411.09124
We present a microscopic dynamical model to study the formation, dissociation, and recombination processes of charmonium states in a heat bath at constant temperature and volume. Within this classical approach, heavy quarks are described as Brownian
Externí odkaz:
http://arxiv.org/abs/2410.19619
Autor:
Nemchik, J., Óbertová, J.
Publikováno v:
Phys. Rev. D. 110, 054015 (2024)
We study for the first time the production of charmonia in nuclear ultra-peripheral and electron-ion collisions based on a rigorous Green function formalism. Such formalism allows to incorporate properly formation effects (color transparency), as wel
Externí odkaz:
http://arxiv.org/abs/2407.02219
Publikováno v:
Phys. Rev. D 109, 114024 (2024)
We investigate the gravitational form factors of charmonium. Our method is based on a Hamiltonian formalism on the light front known as basis light-front quantization. The charmonium mass spectrum and light-front wave functions were obtained from dia
Externí odkaz:
http://arxiv.org/abs/2404.06259
Publikováno v:
ITM Web Conf. Volume 61, 2024 (9 pages)
Investigating the properties of excited charmonia is important to clarify its internal structure. In this paper, we present the mass spectra (MS) and decay constants (DC) for charmonia up to 3S states calculated by means of the light-front quark mode
Externí odkaz:
http://arxiv.org/abs/2402.11564
Publikováno v:
Phys. Rev. D 109, 094048 (2024)
Recently, the BESIII collaboration performed a precise measurement of the $e^+e^-\to \eta J/\psi$ cross section. It is puzzling that the resonance parameters of the reported $Y(4230)$ show a substantial divergence from the previously measured results
Externí odkaz:
http://arxiv.org/abs/2403.03705
Autor:
Siddikov, Marat
In this preprint we analyze the inclusive photoproduction of heavy charmonia-bottomonia pairs in the Color Glass Condensate framework and demonstrate that the cross-section of the process is sensitive to dipole and quadrupole forward scattering ampli
Externí odkaz:
http://arxiv.org/abs/2401.16389
Inclusive $P$-wave charmonia production in hadronic collisions at high energies is discussed in the framework of non-relativistic QCD and $k_T$-factorization formalism. We present two consistent approches to merge the usual leading order $k_T$-factor
Externí odkaz:
http://arxiv.org/abs/2310.19328