Exclusive open strangeness production in the $pp\to pp{K}^{+}{K}^{-}$ reaction at high energies and a measurement of scalar ${\chi }_{c0}$ meson

Abstract

We discuss the results of exclusive $pp\to pp{K}^{+}{K}^{-}$ reaction at high energies which constitutes an irreducible background to three-body processes $pp\to ppM$, where $M=\varphi$, $f_2(1275)$, $f_0(1500)$, $f_2^{\prime }(1525)$, ${\chi }_{c0}$. We consider central diffractive contribution mediated by Pomeron and Reggeon exchanges including absorption effects due to proton-proton interaction and kaon-kaon rescattering. We make predictions for future experiments at RHIC, Tevatron and LHC. Differential distributions in invariant two-kaon mass, kaon rapidities and transverse momenta of kaons are presented. We discuss a measurement of exclusive production of scalar ${\chi }_{c0}$ meson in the proton-(anti)proton collisions via ${\chi }_{c0}\to K^{+}{K}^{-}$ decay. The corresponding amplitude for exclusive central diffractive ${\chi }_{c0}$ meson production is calculated within the $k_t$-factorization approach.

Comments: 6 pages, 4 figures, talk presented at the Strangeness in Quark Matter 2011 Conference, Sept. 18--24, Cracow, Poland