Photoproduction of strange hidden-charm and hidden-bottom states

TL;DR

This paper investigates the photoproduction of recently discovered strange hidden-charm states and their bottom partners, analyzing cross sections and background processes to assess their detectability at future electron-ion colliders.

Contribution

It provides the first detailed study of the photoproduction mechanisms and cross sections for strange and bottom hidden-charm states, including background analysis from Pomeron exchange.

Findings

Photoproduction cross section of strange partners is 1-2 orders smaller than non-strange states.

Background from Pomeron exchange is carefully analyzed.

Detection prospects at future electron-ion colliders are discussed.

Abstract

Recently BESIII collaboration discovered a charged strange hidden-charm state $Z_{cs}$(3985) in the $D_s^-D^{*0} + D_s^{*-}D^{0}$ spectrum. A higher $Z'_{cs}$ state coupling to $\bar{D}_s^{*-}D^{*0}$ is expected by SU(3)-flavor symmetry, and their bottom partners are anticipated by heavy quark flavor symmetry. Here we study the photoproduction of these exotic states and investigate carefully the background from Pomeron exchange. Our results indicate that the maximal photoproduction cross section of strange partner is around 1 $\sim$ 2 orders of magnitude smaller than that of the corresponding non-strange states. The possibility of searching for them in future electron-ion colliders (EIC) is briefly discussed.