Central production of ${\rho }^0$ in $pp$ collisions with single proton diffractive dissociation at the LHC

Abstract

We consider the $pp\to pp{\rho }^0{\pi }^0$ and $pp\to pn{\rho }^0{\pi }^{+}$ processes at LHC energies. Our description is based on the nonperturbative framework of tensor pomeron and tensor reggeon exchanges. We discuss the Drell-Hiida-Deck type mechanism with centrally produced ${\rho }^0$ meson associated with a very forward/backward $\pi N$ system. The considered processes constitute an inelastic (non-exclusive) background to the $pp\to pp{\rho }^0$ reaction in the case when only the centrally produced ${\rho }^0$ meson decaying into ${\pi }^{+}{\pi }^{-}$ is measured, the final state protons are not observed, and only rapidity-gap conditions are checked experimentally. We compare our results for the $\gamma {\pi }^{+}\to {\rho }^0{\pi }^{+}$ reaction with the experimental data obtained by the H1 collaboration at HERA. We present several differential distributions for the $pp\to pn{\rho }^0{\pi }^{+}$ reaction and estimate the size of the proton dissociative background to the exclusive $pp\to pp{\rho }^0$ process. The ratio of integrated cross sections for the inelastic $pp\to pN{\rho }^0\pi$ processes, where $pN{\rho }^0\pi$ stands for $pn{\rho }^0{\pi }^{+}$ plus $pp{\rho }^0{\pi }^0$, to the reference reaction $pp\to pp{\rho }^0$ is of order of (7--10)\%. We present also the ratios of the ${\rho }^0$ rapidity and transverse momentum distributions for the inelastic $pp\to pN{\rho }^0\pi$ versus the elastic $pp\to pp{\rho }^0$ reaction. Our results may be used to investigate the $\gamma \pi \to {\rho }^0\pi$ process at LHC energies.

16 pages, 8 figures

References in corpus (10)

• Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV
• Exclusive $J/\psi$ and $\psi (2S)$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• Exclusive photoproduction of $J/\psi$ in proton-proton and proton-antiproton scattering
• Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV
• Helicity in Proton-Proton Elastic Scattering and the Spin Structure of the Pomeron
• Photoproduction of pi+ pi- pairs in a model with tensor-pomeron and vector-odderon exchange
• The ${\rho }^0$ and Drell-Söding contributions to central exclusive production of ${\pi }^{+}{\pi }^{-}$ pairs in proton-proton collisions at high energies
• Measurement of central exclusive pi+pi- production in p-pbar collisions at sqrt(s) = 0.9 and 1.96 TeV at CDF
• Exclusive photoproduction of charmonia in $\gamma p\to Vp$ and $pp\to pVp$ reactions within $k_t$-factorization approach
• Dual-Regge Approach to High-Energy, Low-Mass Diffraction Dissociation

Cited by in corpus (5)

• Central exclusive diffractive production of $K^{+}{K}^{-}{K}^{+}{K}^{-}$ via the intermediate $\varphi \varphi$ state in proton-proton collisions
• Central exclusive diffractive production of a single photon in high-energy proton-proton collisions within the tensor-Pomeron approach
• Study of the exclusive reaction $pp\to pp{K}^{\ast 0}{\bar{K}}^{\ast 0}$: $f_2(1950)$ resonance versus diffractive continuum
• Exclusive $f_1(1285)$ meson production for energy ranges available at the GSI-FAIR with HADES and PANDA
• Dip-Bump Structure in Proton's Single Diffractive Dissociation at the Large Hadron Collider