Discovery potential for charmonium-like state Y(3940) by the meson photoproduction

TL;DR

This paper assesses the potential to discover the charmonium-like state Y(3940) through photon-proton collisions, analyzing cross sections, background, and event signals to guide experimental searches.

Contribution

It provides a detailed numerical and background analysis of Y(3940) photoproduction, proposing experimental strategies for its detection.

Findings

Cross section for Y(3940) production can reach up to 1 nb

Dalitz plot analysis shows clear distinction of Y(3940) signal from background

Estimated event counts suggest feasible detection in high-luminosity experiments

Abstract

In this work, we investigate the discovery potential for Y(3940) by the photoproduction process $\gamma p\to Y(3940)p$. The numerical result shows that the upper (lower) limit of the total cross section for $\gamma p\to Y(3940)p$ is up to the order of 1 $nb$ (0.1 $\mu b$). Additionally, the background analysis and the Dalitz plot relevant to the production of Y(3940) are studied. The Dalitz plot analysis of Y(3940) production indicates that Y(3940) signal can be distinguished from the background clearly. The lower limit of the number of events of Y(3940) reaches up to 10/0.02GeV$^2$ for one billion collisions of $\gamma p$ by studying the invariant mass spectrum of $J/\psi\omega$. Experimental search for Y(3940) by the meson photoproduction is suggested.