Radiative pipm gamma transitions of excited light-quark mesons in the covariant oscillator quark model
Abstract
The COMPASS collaboration, as a part of their hadron spectroscopy program, is going to measure the radiative decay widths of light-quark mesons via the Primakoff reactions. In this letter we study the photon couplings of light-quark q qbar states in the covariant oscillator quark model and evaluate the transition rates for rho(770), b1(1235), a1(1260), a2(1320), pi2(1670), rho3(1690), rho(1700)pm to pipm gamma, which are expected to be measured by the COMPASS. Such photon couplings could be useful not only for understanding the internal structures of observed light-quark mesons and their quark-model classification but also for the ongoing experimental studies by COMPASS.
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