2019/10/21 by Lebiedowicz, Piotr, Nachtmann, Otto, Szczurek, Antoni
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1910.09375
We discuss the possibility to use the pp → pp ϕϕ process in identifying the odderon exchange. So far there is no unambiguous experimental evidence for the odderon, the charge conjugation C = -1 counterpart of the C= +1 pomeron. Last year results of the TOTEM collaboration suggest that the odderon exchange can be responsible for a disagreement of theoretical calculations and the TOTEM data for elastic proton-proton scattering. Here we present recent studies for central exclusive production (CEP) of ϕϕ pairs in proton-proton collisions. We consider the pomeron-pomeron fusion to ϕϕ (ℙℙ → ϕϕ) through the continuum processes, due to the t- and u-channel reggeized ϕ-meson, photon, and odderon exchanges, as well as through the s-channel resonance process (ℙℙ → f2(2340) → ϕϕ). This f2 state is a candidate for a tensor glueball. The amplitudes for the processes are formulated within the tensor-pomeron and vector-odderon approach. Some model parameters are determined from the comparison to the WA102 experimental data. The odderon exchange is not excluded by the WA102 data for high ϕϕ invariant masses. The measurement of large Mϕϕ or \rmYdiff events at the LHC would therefore suggest presence of the odderon exchange.