# Odderon Exchange from Elastic Scattering Differences between pp and p(p)over-bar Data at 1.96 TeV and from pp Forward Scattering Measurements

Abazov, VM, Abbott, B, Acharya, BS, Adams, M, Adams, T, Agnew, JP, Alexeev, GD, Alkhazov, G, Alton, A, Alves, GA
et al (show 467 more authors) (2021) Odderon Exchange from Elastic Scattering Differences between pp and p(p)over-bar Data at 1.96 TeV and from pp Forward Scattering Measurements. PHYSICAL REVIEW LETTERS, 127 (6). 062003-.

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## Abstract

We describe an analysis comparing the pp[over ¯] elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in pp collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a model-independent approach. The TOTEM cross sections, extrapolated to a center-of-mass energy of sqrt[s]=1.96  TeV, are compared with the D0 measurement in the region of the diffractive minimum and the second maximum of the pp cross section. The two data sets disagree at the 3.4σ level and thus provide evidence for the t-channel exchange of a colorless, C-odd gluonic compound, also known as the odderon. We combine these results with a TOTEM analysis of the same C-odd exchange based on the total cross section and the ratio of the real to imaginary parts of the forward elastic strong interaction scattering amplitude in pp scattering for which the significance is between 3.4σ and 4.6σ. The combined significance is larger than 5σ and is interpreted as the first observation of the exchange of a colorless, C-odd gluonic compound.

Item Type: Article D0 collaboration, TOTEM Collaboration Faculty of Science and Engineering > School of Physical Sciences Symplectic Admin 17 Dec 2021 13:35 18 Jan 2023 21:19 10.1103/PhysRevLett.127.062003 https://journals.aps.org/prl/abstract/10.1103/Phys... https://livrepository.liverpool.ac.uk/id/eprint/3145570