Exclusive scalar glueball f0(1500) production for FAIR and J-PARC energy range
Abstract
We evaluate differential distributions for exclusive scalar f0(1500) production for p p N1 N2 f0 (FAIR@GSI) and p p p p f0 (J-PARC@Tokai). Both QCD diffractive and pion-pion meson exchange current (MEC) components are included. Rather large cross sections are predicted. The pion-pion component, never discussed in the literature, dominates close to the threshold while the diffractive component takes over for larger energies. The diffractive component is calculated based on two-gluon impact factors as well as in the framework of Khoze-Martin-Ryskin approach proposed for diffractive Higgs boson production. Different unintegrated gluon distribution functions (UGDFs) from the literature are used. The production of f0(1500) close to threshold could limit the so-called π NN form factor in the region of larger pion virtualities.