Production of Tcc+ exotic state in the γp →d+ T ¯ cc- Λc+ reaction PRODUCTION of Tcc+ EXOTIC STATE in the ... YIN HUANG et al.

Stimulated by the recent LHCb observation of a new exotic charged structure Tcc+, we propose to use the central diffractive mechanism existing in the γp→D+T¯cc-Λc+ (T¯cc- is the antiparticle of Tcc+) reaction to produce Tcc+. Our theoretical approach is based on the chiral unitary theory where the Tcc+ resonance is dynamically generated. With the coupling constant of the Tcc+ to DD∗ channel obtained from chiral unitary theory, the total cross sections of the γp→D+T¯cc-Λc+ reaction are evaluated. Our study indicates that the cross section for γp→D+T¯cc-Λc+ reaction is on the order of 1.0 pb, which is accessible at the proposed the Electron-Ion Collider in China [Front. Phys. (Beijing) 16, 64701 (2021)] or the U.S. [Eur. Phys. J. A 52, 268 (2016)EPJAFV1434-600110.1140/epja/i2016-16268-9] due to the higher luminosity. If measured and confirmed in the future experiments, the predicted total cross sections can be used to verify the (molecular) nature of the Tcc+.