Searching for odderon in exclusive reactions: $pp \to pp p {\bar p}$, $pp \to pp \phi \phi$ and $pp \to pp \phi$

Apr 9, 2019, 12:05 PM
20m
Cavallerizza Reale - Aula Multifunzione

Cavallerizza Reale - Aula Multifunzione

Via Verdi, 9 Turin
Parallel Session Talk WG2: Low-x and Diffraction WG2: Small-x and Diffraction

Speakers

Antoni Szczurek (Institute of Nuclear Physics) Otto Nachtmann (U)Dr Piotr Lebiedowicz (Institute of Nuclear Physics PAN)

Description

Recent results of the TOTEM collaboration [1] suggest that the odderon exchange can be responsible for a disagreement of theoretical calculations and the TOTEM data [2] for elastic $pp$ scattering. It is premature to draw conclusions. Here we present our recent studies for three different processes in $pp$ collisions where the odderon may show up. We apply recently proposed tensor-pomeron and vector-odderon model for soft high-energy processes [3].

The first study concerns CEP of $p \bar{p}$ pairs [4]. Here the odderon exchange may lead to asymmetries for proton and antiproton. It seems, however that the effect from subleading reggeons competes with the odderon. In the process $pp \to pp \phi \phi$ [5] the odderon does not couple to protons. For the $pp \to pp \phi$ reaction [6] the odderon-pomeron fusion is an alternative to the photon-pomeron fusion.We consider also other subleading processes to understand the WA102 experimental data [7] and check room left for the odderon exchange. The interference of photoproduction and odderon contributions can explain azimuthal correlations between protons. Upper limit for odderon exchange is obtained. Predictions for the LHC will be presented.

[1] TOTEM Collaboration, arXiv:1812.04732
[2] E. Martynov, B. Nicolescu, Phys. Lett. B786 (2018) 207
[3] C. Ewerz, M. Maniatis, O. Nachtmann, Annals Phys. 342 (2014) 31
[4] P. Lebiedowicz, O. Nachtmann, A. Szczurek, Phys. Rev. D97 (2018) 094027
[5] P. Lebiedowicz, O. Nachtmann, A. Szczurek, arXiv:1901.11490
[6] P. Lebiedowicz, O. Nachtmann, A. Szczurek, in preparation
[7] WA102 Collaboration, Phys. Lett. B432 (1998) 436, B489 (2000) 29

Primary authors

Antoni Szczurek (Institute of Nuclear Physics) Otto Nachtmann (U) Dr Piotr Lebiedowicz (Institute of Nuclear Physics PAN)

Presentation materials