Ground state heavy tetraquark production in heavy quark fragmentation

S Mohammad Moosavi Nejad,Nahid Amiri

doi:10.1103/physrevd.105.034001

S Mohammad Moosavi Nejad, Nahid Amiri

Open Access

https://doi.org/10.1103/physrevd.105.034001

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Abstract

During recent years, the study of exotic hadrons including tetraquarks and pentaquarks has attracted a lot of interest, and more studies are in progress experimentally and theoretically. It is well known that at sufficiently large transverse momentum the dominant production mechanism for standard heavy hadrons (mesons/baryons) is actually the fragmentation so that the same mechanism is also proposed for the production of heavy exotic hadrons. This work is the first attempt to study the direct fragmentation of a heavy quark into ground state heavy tetraquarks in leading order of perturbative QCD. In this regard, we will present an analytical expression for the fragmentation production of neutral hidden flavor tetraquarks $(Qq\overline{Q}\overline{q})$ which includes most of the kinematical and dynamical properties of the process.

Highlights

Since the early days of the quark model it has been assumed the possibility of the existence of exotic multiquark hadrons with the content of the valence quarks/ antiquarks different from those in standard mesons and baryons
This work is the first attempt to study the direct fragmentation of a heavy quark into ground state heavy tetraquarks in leading order of perturbative QCD
II, we present the theoretical formalism for the heavy tetraquark fragmentation function (FF) in the Suzuki model and present our numerical results, and our discussions and conclusions are given in the last section

Summary

Ground state heavy tetraquark production in heavy quark fragmentation

The study of exotic hadrons including tetraquarks and pentaquarks has attracted a lot of interest, and more studies are in progress experimentally and theoretically. It is well known that at sufficiently large transverse momentum the dominant production mechanism for standard heavy hadrons (mesons/baryons) is the fragmentation so that the same mechanism is proposed for the production of heavy exotic hadrons. This work is the first attempt to study the direct fragmentation of a heavy quark into ground state heavy tetraquarks in leading order of perturbative QCD. In this regard, we will present an analytical expression for the fragmentation production of neutral hidden flavor tetraquarks ðQqQq ̄ Þ which includes most of the kinematical and dynamical properties of the process

INTRODUCTION

Published by the American Physical Society

QqQ qs QQ

CONCLUSION