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arXiv · 2109.06271

Comparison of $pp$ and $p\bar{p}$ differential elastic cross sections and observation of colourless C-odd gluonic exchanges

Kenneth Österberg
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Abstract

The TOTEM 2.76, 7, 8, and 13 TeV pp elastic differential cross sections are extrapolated using a data-driven approach to obtain the 1.96 TeV pp elastic cross section. A difference with a 3.4$\sigma$ significance is observed between the extrapolated pp elastic cross section and the D0 p$\bar{\rm p}$ elastic cross section at 1.96 TeV in the region of the diffractive minimum and the second maximum of the pp cross section, providing evidence for colourless C-odd gluonic exchanges, also denoted as odderon. These results are combined with a TOTEM analysis of the same $t$-channel C-odd exchanges based on forward pp elastic scattering at TeV scale. The combined significance is larger than 5$\sigma$ and is interpreted as the first observation of odderon exchange.

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Kenneth Österberg. 2021-09-13. Comparison of $pp$ and $p\bar{p}$ differential elastic cross sections and observation of colourless C-odd gluonic exchanges. https://arxiv.org/abs/2109.06271

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