Rare fluctuations of the S matrix at NLO in QCD

We calculate the rare fluctuations of the S matrix for high-energy dipole-dipole scattering on top of the full next-to-leading-order corrections in the center of mass frame. The relevant result in the saturation regime shows that the exponential factor of the S matrix is 2 as large as the result whi...

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Bibliographic Details
Published in:Physical review. D 2019-05, Vol.99 (9), p.096026, Article 096026
Main Authors: Xiang, Wenchang, Cai, Yanbing, Wang, Mengliang, Zhou, Daicui
Format: Article
Language:English
Subjects:
Dipoles
Variation
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Summary:We calculate the rare fluctuations of the S matrix for high-energy dipole-dipole scattering on top of the full next-to-leading-order corrections in the center of mass frame. The relevant result in the saturation regime shows that the exponential factor of the S matrix is 2 as large as the result which emerges when the rare fluctuation effects are taken into account. We find that the factor of 2 change of the exponential factor is induced by the gluon loop corrections which compensate for part of the rapidity decrease of the S matrix made by quark loops and lead to the rare fluctuations becoming important again. To ensure the relevant results of the S matrix are independent of the frame choice, the rare fluctuations of the S matrix are also derived in a general frame. It is found that all the results are consistent with each other in both frames.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.096026