Central exclusive production of scalar χ_c meson at the Tevatron, RHIC and LHC energies

Abstract

We calculate several differential distributions for exclusive double diffractive ${\chi }_c(0^{++})$ production in proton-antiproton collisions at the Tevatron and in proton-proton collisions at RHIC and LHC in terms of unintegrated gluon distributions (UGDFs) within the $k_t$-factorisation approach. The uncertainties of the Khoze-Martin-Ryskin approach are discussed in detail. The $g^{\ast }{g}^{\ast }\to {\chi }_c(0^{++})$ transition vertex is calculated as a function of gluon virtualities applying the standard pNRQCD technique. The off-shell effects are discussed and quantified. They lead to a reduction of the cross section by a factor 2--5, depending on the position in the phase space and UGDFs. Different models of UGDFs are used and the results are shown and discussed. The cross section for diffractive component depends strongly on UGDFs. We calculate also the differential distributions for the ${\gamma }^{\ast }{\gamma }^{\ast }\to {\chi }_c(0^{++})$ fusion mechanism. The integrated cross section for photon-photon fusion is much smaller than that of diffractive origin. The two components have very different dependence on momentum transfers $t_1,t_2$ in the nucleon lines as well as azimuthal-angle correlations between both outgoing nucleons.

arXiv comment34 pages, 23 figures, 2 tables

References in corpus (54)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Total cross sections
• Saturation in Diffractive Deep Inelastic Scattering
• Analytic Model for the QCD Running Coupling with Universal ${\bar{\alpha }}_s(0)$ Value
• Color-octet quarkonia production
• Unintegrated parton distributions
• Color-octet quarkonia production II
• Manifestations of high density QCD in the first RHIC data
• Non-perturbative Propagators, Running Coupling and Dynamical Quark Mass of Landau gauge QCD
• Prospects for New Physics observations in diffractive processes at the LHC and Tevatron
• Quarkonium Production at High-Energy Colliders
• Next-to-leading Corrections to the BFKL Equation From the Gluon and Quark Production
• On the running coupling constant in QCD
• Specific Features of Heavy Quark Production. LPHD approach to heavy particle spectra
• Determining the Gluonic Content of Isoscalar Mesons
• Production of Heavy Quarkonium in High Energy Colliders
• Unintegrated parton distributions and prompt photon hadroproduction
• Extending the study of the Higgs sector at the LHC by proton tagging
• Central exclusive diffractive production as a spin--parity analyser: from hadrons to Higgs
• Charmonium Production at High Energy in the k_T-Factorization Approach
• Exclusive photoproduction of $J/\psi$ in proton-proton and proton-antiproton scattering
• Towards a solution of the charmonium production controversy: k_t-factorization versus color octet mechanism
• Non Abelian $q\bar{q}$ contributions to small-$x$ anomalous dimensions
• Positivity Constraints for off-Forward Parton Distributions
• Quark-antiquark contribution to the BFKL kernel
• The rapidity gap Higgs signal at LHC
• k-Factorization and Small-x Anomalous Dimensions
• Studying the MSSM Higgs sector by forward proton tagging at the LHC
• Heavy quark production as sensitive test for an improved description of high energy hadron collisions
• Direct J/Psi hadroproduction in k_\perp-factorization and the color octet mechanism
• QCD Power Corrections from a Simple Model for the Running Coupling
• Perturbation theory in the nonperturbative QCD vacuum
• Exclusive J/psi and Upsilon hadroproduction and the QCD odderon
• Bottomonium Production in the Regge Limit of QCD
• Radiative Decay of Vector Quarkonium: Constraints on Glueballs and Light Gluinos
• Exclusive Higgs boson production at the LHC: hard rescattering corrections
• Gluon transverse momenta and charm quark-antiquark pair production in $p-\bar{p}$ collisions at Tevatron
• Analyticity and Minimality of Nonperturbative Contributions in Perturbative region for ${\bar{\alpha }}_s$
• Search for exclusive events using the dijet mass fraction at the Tevatron
• On the role of hard rescattering in exclusive diffractive Higgs production
• Direct J/psi and psi' hadroproduction via fragmentation in the collinear parton model and k_T-factorization approach
• Diffractive Dijet Production at sqrt(s)=630 and 1800 GeV at the Fermilab Tevatron
• Heavy quarkonium production in double Pomeron exchange processes in perturbative QCD
• Scalar Higgs boson production in a fusion of two off-shell gluons
• $pp\to pp{\eta }^{\prime }$ reaction at high energies
• Diffractive $\chi$ Production at the Tevatron and the LHC
• Renormalons and fixed points
• Uncertainties on Central Exclusive Scalar Luminosities from the unintegrated gluon distributions
• On charmonia and charmed mesons photoproduction at high energy
• Charm Hadroproduction in $k_T$-Factorization Approach
• Central Pseudorapidity Gaps in Events with a Leading Antiproton at the Fermilab Tevatron pbar-p Collider
• Exclusive Double Diffractive Events: Menu for LHC
• Central Exclusive Scalar Luminosities from the Linked Dipole Chain Model gluon densities

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• Prediction for unintegrated parton distributions
• Central exclusive ${\chi }_{c,b}$ production at high energy colliders and gluon saturation approach
• Exclusive production of χ_{c}(0^{+}) meson and its measurement in the π^{+}π^{-} channel
• Central exclusive production at high energies
• Exclusive Processes at Colliders
• Exclusive Production of Quarkonia in $pp$ and $p\bar{p}$ Collisions Far from the Threshold