Tensor pomeron, vector odderon and diffractive production of meson and baryon pairs in proton-proton collisions

Piotr Lebiedowicz,Otto Nachtmann,Antoni Szczurek

doi:10.1051/epjconf/201920606005

Abstract

We review some selected results of the tensor-pomeron and vectorodderon model of soft high-energy proton-proton scattering and central exclusive production of meson and baryon pairs in proton-proton collisions. We discuss the theoretical aspects of this approach and consider the phenomenological implications in a variety of processes at high energies, comparing to existing experimental data. We consider the diﬀractive dipion and dikaon production including the continuum and the dominant scalar and tensor resonance contributions as well as the photoproduction processes. The theoretical results are compared with existing CDF experimental data and predictions for planned or current LHC experiments, ALICE, ATLAS, CMS, LHCb are presented.

Highlights

There is a growing experimental and theoretical interest in understanding diffractive processes at high energy in proton-(anti)proton collisions
[4] Collaborations at the LHC and by the STAR [5] Collaboration at RHIC. Such results will have diffractive nature, further efforts are needed to ensure their exclusivity. These measurements are important in the context of resonance production, in particular, in searches for the gluon bound states
Future experiments at the LHC will be able to detect all particles produced in central exclusive production (CEP), including the forward and backward going protons

Summary

Introduction

There is a growing experimental and theoretical interest in understanding diffractive processes at high energy in proton-(anti)proton collisions. Preliminary results of similar CEP studies were presented by the ALICE [3] and LHCb [4] Collaborations at the LHC and by the STAR [5] Collaboration at RHIC Such results will have diffractive nature, further efforts are needed to ensure their exclusivity. The central exclusive diffractive production of π+π− continuum together with the dominant scalar f0(500), f0(980), and tensor f2(1270) resonances was studied by us in [15]. In [17], the exclusive diffractive production of the K+K− in the continuum and via the dominant scalar f0(980), f0(1500), f0(1710), and tensor f2(1270), f2(1525) resonances, as well as the K+K− photoproduction contributions, were discussed in detail. The central exclusive π+π−π+π− production via the intermediate σσ and ρ0ρ0 states in pp collisions was studied in [19]

Formalism

Selected results

Conclusions