Semi-inclusive electroproduction of hidden-charm and double-charm hadronic molecules

Abstract

The semi-inclusive electroproduction of exotic hadrons, including the 𝑇 𝑐𝑐 states, 𝑃 𝑐𝑠 states, and hidden-charm baryon-antibaryon states, is explored under the assumption that they are 𝑆-wave hadronic molecules of a pair of charmed hadrons. We employ the Monte Carlo event generator Pythia to produce the hadron pairs and then bind them together to form hadronic molecules. With the use of such production mechanism, the semi-inclusive electroproduction rates are estimated at the order-of-magnitude level. Our results indicate that a larger number of 𝑃 𝑐𝑠 states and Λ 𝑐 Λ𝑐 molecules can be produced at the proposed electron-ion colliders in China and in the US, EicC and US-EIC, respectively. The results also suggest that the 𝑇 𝑐𝑐 states and other hidden-charm baryon-antibaryon states can be searched for at US-EIC. Besides, the potential 24 GeV upgrade of CEBAF at Jefferson Lab can play an important role in the search of the hidden-charm tetraquark and pentaquark states due to its high luminosity.

Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

“…Semi-inclusive electroproduction is another alternative to collect more events [246,247], especially useful for those states of lower rates, e.g. double-charm states T cc [248].…”