Central exclusive diffractive production of axial-vector f1(1285) and f

Abstract

The production of 1 (= 1 ++) mesons in proton-proton collisions via pomeron-pomeron fusion is discussed. Two ways to construct the pomeron-pomeron-1 coupling are presented. Comparisons with data from the WA102 experiment are made and predictions for RHIC and LHC experiments are given.

$$\pi ^-p\rightarrow \eta ^{(\prime )}\, \pi ^- p$$ in the double-Regge region

“…An application of such formalism was presented in [29] for a similar reaction, two-pseudoscalar mesons production in K ± and π ± beam diffraction. More recently the double-Regge exchange was used to describe the central meson production in the high energy proton-proton collisions [30][31][32]. We will adopt the same model and quote in this section its main features.…”

Central exclusive production of axial-vector $f_{1}$ mesons in proton-proton collisions

“…Using this we have calculated in our tensor-pomeron approach the cross sections, the t and φ pp distributions for f 1 (1285) and f 1 (1420) CEP, and compared our results to the WA102 data. In figures 3-5 we show some of our results [1] which include -very important -absorptive corrections. Here Λ E is a form-factor parameter.…”

“…where M 0 ≡ 1 GeV (introduced for dimensional reasons), P κλ is the P effective field, U α is the f 1 field, g ′ PP f 1 and g ′′ PP f 1 are dimensionless coupling constants, and Γ (8) , Γ (10) are known tensor functions [1]. We use then these couplings, supplemented by suitable form factors, for the f 1 CEP reaction.…”

“…The presentation is based on [1] where all details and many more results can be found. At high energies the reaction (1) should be mainly due to double-pomeron exchange (figure 1).…”

“…As a concrete example we shall consider the f 1 (1285) meson. The presentation is based on [1] where all details and many more results can be found. At high energies the fusion process (figure 1) is expected to be dominant.…”