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Heptagon functions and seven-gluon amplitudes in multi-Regge kinematics

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); SLAC
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Humboldt Univ. of Berlin (Germany). Inst. for Physics; Max Planck Inst. for Physics, Munich (Germany)
We compute all 2 → 5 gluon scattering amplitudes in planar $$ \mathcal{N} $$ N = 4 super-Yang-Mills theory in the multi-Regge limit that is sensitive to the non-trivial (“long”) Regge cut. We provide the amplitudes through four loops and to all logarithmic accuracy at leading power, in terms of single-valued multiple polylogarithms of two variables. To obtain these results, we leverage the function-level results for the amplitudes in the Steinmann cluster bootstrap. To high powers in the series expansion in the two variables, our results agree with the recently conjectured all-order central emission vertex used in the Fourier-Mellin representation of amplitudes in multi-Regge kinematics. Our results therefore provide a resummation of the Fourier-Mellin residues into single-valued polylogarithms, and constitute an important cross-check between the bootstrap approach and the all-orders multi-Regge proposal.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1847098
Alternate ID(s):
OSTI ID: 1865163
Report Number(s):
SLAC–PUB–17630
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 12 Vol. 2021; ISSN 1029-8479
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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