A theoretical investigation on the spectroscopy and structure of the exotic tetraquark states

Abstract

Treating the tetraquark as a composite system of diquark-antidiquark, the effective masses of diquarks have been estimated in the Composite Fermion (CF) quasiparticle model. Hence, the masses of the exotic tetraquark states such as Tcc, Zc, X, Y, f0 etc. have been explored in the framework of the Composite Fermion (CF) approach and the computed results compare favourably with the experimental data. Moreover, the form factors of these exotic tetraquarks have been investigated for the momentum transfers, Q2 in the range of 0.01<Q2<1.0GeV2. The form factors are found to decrease sharply with the increase of Q2 in the range of 0.01<Q2<0.1GeV2 which indicates the scaling violation with the gluon contribution to the form factor and the structure function. However, the form factors show gradual decrease with a small scaling violation in the range of 0.1<Q2<1.0GeV2.