Next-to-leading order QCD corrections to electromagnetic production and decay of fully charm tetraquarks

TL;DR

This paper calculates next-to-leading-order QCD corrections to the electromagnetic decay and production of fully charm tetraquarks, providing theoretical predictions for their detection in high-energy collisions.

Contribution

It presents the first analytical NLO QCD corrections to fully charm tetraquark decay amplitudes and predicts production cross sections in various high-energy collision processes.

Findings

QCD corrections are significant for $J^{PC}=0^{++}$ decay

Corrections are small for $J^{PC}=2^{++}$ decay

Predicted production cross sections can be tested experimentally

Abstract

We investigate the electromagnetic properties of the fully charm tetraquark states, particularly incorporating contributions from internal gluon radiations. The paper first presents analytical expressions for the next-to-leading-order (NLO) QCD corrections to the decay amplitudes of fully charm tetraquarks into two photons. It is found that the QCD corrections are significant for the $J^{PC}=0^{++}$ fully charm tetraquark decay process, whereas they are relatively small for the $J^{PC}=2^{++}$ fully charm tetraquark decay process. Subsequently, by considering photon-photon fusion in ultra-peripheral high-energy collisions of protons and nuclei and in electron-positron collision processes, we provide theoretical predictions for the production cross sections of fully-charm tetraquark states. The results presented in this work regarding the electromagnetic production and decay of fully charm tetraquarks shall be tested in current and future experiments.