The $\bar{p}p\to \varphi \varphi$ reaction in an effective Lagrangian approach

Abstract

We investigate the $\bar{p}p\to \varphi \varphi$ reaction within an effective Lagrangian approach.We show that the inclusion of either a scalar meson $f_0$ or a tensor meson $f_2$ in the $s$-channel can lead to a fairly good description of the bump structure of the total cross section around the invariant $\bar{p}p$ mass $W\simeq 2.2$ GeV, which cannot be reproduced with only the "background" contributions from $t$- and $u$-channel $N^{\ast }(1535)$ resonance as studied in a previous work. From the fits, we infer the properties of the involved scalar or tensor resonances.

Comments: Published in Phys. Rev. C