Is BFKL factorization valid for MuellerTang jets?
Abstract
The perturbative QCD description of highenergy hadroproduction of two hard jets separated by a large rapidity gap void of emission (also called MuellerTang jets) is based on a factorization formula of BFKL type that represents exchanges of coloursinglet objects among the external particles. This formula resums to all perturbative orders a certain class of Feynman diagrams that are supposed to dominate the crosssection in the Regge limit. However, the explicit calculations at nexttoleading logarithmic order questions the validity of such factorization when an IR safe jet algorithm is used to reconstruct jets. We show the origin of such violation of factorization, and quantify its impact for LHC phenomenology. In this connection, we estimate the impact of other contributions to the crosssection that are not included in the MuellerTang factorization formula  colour nonsinglet exchanges  that, at low rapidity separation, compete with the singlet ones.
 Publication:

arXiv eprints
 Pub Date:
 November 2021
 arXiv:
 arXiv:2111.13916
 Bibcode:
 2021arXiv211113916C
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 8 pages, 10 figures, proceedings of the conference Lowx 2021