Towards a complete study of central exclusive production of $K^{+}{K}^{-}$ pairs in proton-proton collisions within the tensor Pomeron approach

Abstract

We present a study of the central exclusive production of the $K^{+}{K}^{-}$ pairs in proton-proton collisions at high energies. We consider diffractive mechanisms including the $K^{+}{K}^{-}$ continuum, the dominant scalar $f_0(980)$, $f_0(1500)$, $f_0(1710)$ and tensor $f_2(1270)$, $f_2^{\prime }(1525)$ resonances decaying into the $K^{+}{K}^{-}$ pairs. We include also photoproduction mechanisms for the non-resonant (Drell-Söding) and the $\varphi (1020)$ resonance contributions. The theoretical results are calculated within the tensor-pomeron approach including both pomeron and reggeon exchanges. Predictions for planned or current experiments at RHIC and LHC are presented. We discuss the influence of the experimental cuts on the integrated cross section and on various differential distributions for outgoing particles. The distributions in two-kaon invariant mass, in a special `glueball filter variable', as well as examples of angular distributions in the $K^{+}{K}^{-}$ rest frame are presented. We compare the $\varphi (1020)$ and continuum photoproduction contributions to the $f_0(980)$ and continuum diffractive contributions and discuss whether the $\varphi (1020)$ resonance could be extracted experimentally. For the determination of some model parameters we also include a discussion of $K$-nucleon scattering, in particular total cross sections, and of $\varphi (1020)$ photoproduction.

35 pages, 12 figures, v2 reflects that accepted for publication in PRD

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• Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $\sqrt{s}=200$ GeV with the STAR detector at RHIC
• Central exclusive diffractive production of axial-vector $f_1(1285)$ and $f_1(1420)$ mesons in proton-proton collisions
• Searching for the odderon in $pp\to pp{K}^{+}{K}^{-}$ and $pp\to pp{\mu }^{+}{\mu }^{-}$ reactions in the $\varphi (1020)$ resonance region at the LHC
• Extracting the pomeron-pomeron-$f_2(1270)$ coupling in the $pp\to pp{\pi }^{+}{\pi }^{-}$ reaction through angular distributions of the pions
• High-energy $\pi \pi$ scattering without and with photon radiation
• Proton-proton forward scattering at the LHC
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• Photoproduction of K${}^{+}$K${}^{-}$ pairs in ultra-peripheral collisions
• Study of the exclusive reaction $pp\to pp{K}^{\ast 0}{\bar{K}}^{\ast 0}$: $f_2(1950)$ resonance versus diffractive continuum
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• Exclusive and semiexclusive production of ${\mu }^{+}{\mu }^{-}$ pairs with $\Delta$ isobars and other resonances in the final state and the size of absorption effects
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• Nonperturbative gluon exchange in $pp$ elastic scattering at TeV energies
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• Central exclusive production of $K^{+}{K}^{-}$ pairs in proton-proton collisions
• Searching for Odderon in Central Exclusive Processes at the LHC
• SU(3) Gauge Symmetry: An Experimental Review of Diffractive Physics in e+p, p+p, p+A, and A+A Collision Systems