Exclusive radiative production of fully-charmed tetraquarks at $B$ Factory

TL;DR

This paper predicts the production rates of fully-charmed tetraquarks with a photon at B factories using NRQCD, providing estimates for their observability at Belle 2 based on theoretical calculations.

Contribution

It applies a new NRQCD factorization approach to analyze exclusive tetraquark production at B factories, focusing on specific quantum states and estimating their production rates.

Findings

Predicted production rates for $0^{++}$ and $2^{++}$ tetraquarks at $ oot s=10.6$ GeV.

Estimated observability of these tetraquarks at Belle 2.

Provided theoretical framework for future experimental searches.

Abstract

We apply the newly developed NRQCD factorization formula to analyze the exclusive production of the fully-charmed tetraquark $T_{4c}$ plus a hard photon at $B$ factory. For simplicity, in this work we have concentrated on the associated production of the $0^{++}$ and $2^{++}$ tetraquarks with a photon. With some rough estimates about the size of the unknown nonperturbative NRQCD matrix elements, we predict the production rates of these types of exclusive channels at $\sqrt{s}=10.6$ GeV and also assess their observation prospect at {\tt Belle 2} experiment.