Exclusive $pp \to nn \pi^{+}\pi^{+}$ reaction at LHC and RHIC
Abstract
We evaluate differential distributions for the four-body reaction. The amplitude for the process is calculated in the Regge approach including many diagrams. We make predictions for possible future experiments at RHIC and LHC energies. Very large cross sections are found which is partially due to interference of a few mechanisms. Presence of several interfering mechanisms precludes extraction of the elastic scattering cross section. Absorption effects are estimated. Differential distributions in pseudorapidity, rapidity, invariant two-pion mass, transverse-momentum and energy distributions of neutrons are presented for proton-proton collisions at = 500 GeV (RHIC) and = 0.9, 2.36 and 7 TeV (LHC). Cross sections with experimental cuts are presented.
Keywords
Cite
@article{arxiv.1005.2309,
title = {Exclusive $pp \to nn \pi^{+}\pi^{+}$ reaction at LHC and RHIC},
author = {Piotr Lebiedowicz and Antoni Szczurek},
journal= {arXiv preprint arXiv:1005.2309},
year = {2015}
}
Comments
22 pages, 18 figures, calculations have been corrected, new processes added, discussion expanded in print in Phys. Rev.D