Photoproduction of Heavy Meson and Photon Pairs

被引：0

作者：

Siddikov, Marat ^{[1
,2
]}

机构：

[1] Univ Tecn Federico Santa Maria, Dept Fis, Casilla 110-V, Valparaiso, Chile

[2] Ctr Cient Tecnol Valparaiso, Casilla 110-V, Valparaiso, Chile

来源：

PARTICLES | 2025年 / 8卷 / 01期

关键词：

generalized parton distributions; proton tomography; exclusive photoproduction; PARTON; ELECTROPRODUCTION; QUARK; GPDS;

D O I：

10.3390/particles8010023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The extraction of the Generalized Parton Distributions of the nucleons from phenomenological analyses of experimental data presents a challenging problem which is being actively studied in the literature. Due to theoretical limitations of some of the well-known channels, currently many new processes are being analyzed in the literature as potential novel probes. In this proceeding we propose to use the exclusive photoproduction of eta c gamma pairs as a new channel for study of the GPDs. Our analysis shows that this process is primarily sensitive to the unpolarized gluon GPDs Hg in the Efremov-Radyushkin-Brodsky-Lepage (ERBL) kinematics. The numerical estimates of the cross-section and the expected counting rates for middle-energy photoproduction experiments show that expected counting rates are sufficiently large for a dedicated experimental study at the future Electron-Ion Collider (EIC) or in ultraperipheral collisions at the LHC. The total (integrated) photoproduction cross-section sigma tot gamma p ->gamma eta cp in this kinematics scales with energy W as sigma tot gamma p ->gamma eta cpW,M gamma eta c >= 3.5GeV approximate to 0.48pbW100GeV0.75, and yields a few thousands of events per 100fb-1 of the integrated luminosity.

引用

页数：11

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