Eur. Phys. J. A (2021) 57: 127
https://doi.org/10.1140/epja/s10050-021-00445-4

Regular Article –Theoretical Physics

Strong decays with the boost-corrected wave functions

NRC “Kurchatov Institute”-ITEP, B. Cheremushkinskaya 25, 117259, Moscow, Russia

^a simonov@itep.ru

Received: 6 January 2021
Accepted: 25 March 2021
Published online: 10 April 2021

Abstract

Strong decay probabilities are calculated using the Lorentz contracted wave functions of decay products, determined in the arbitrary dynamical scheme with the instantaneous interaction. It is shown that the decay width acquires an additional factor, defined by the contraction coefficient $C_m(s)$, which for the two-body equal mass decays is $C_m^2(s)=4m^2/s$ , $s=E^2$. The resulting decay widths are compared to experimental data, where, in particular the $\rho (770),\rho (1450)$ decay data, require an additional 1/s dependence of the width to fit the data. Important consequences for the dynamics of hadron decays and scattering are shortly discussed.