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Title: A subleading operator basis and matching for gg → H

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2]; ORCiD logo [2]
  1. Univ. of California, Berkeley, CA (United States). Berkeley Center for Theoretical Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics

The Soft Collinear Effective Theory (SCET) is a powerful framework for studying factorization of amplitudes and cross sections in QCD. While factorization at leading power has been well studied, much less is known at subleading powers in the λ << 1 expansion. In SCET subleading soft and collinear corrections to a hard scattering process are described by power suppressed operators, which must be fixed case by case, and by well established power suppressed Lagrangians, which correct the leading power dynamics of soft and collinear radiation. Here we present a complete basis of power suppressed operators for gg → H, classifying all operators which contribute to the cross section at O(λ2), and showing how helicity selection rules significantly simplify the construction of the operator basis. We perform matching calculations to determine the tree level Wilson coefficients of our operators. These results are useful for studies of power corrections in both resummed and fixed order perturbation theory, and for understanding the factorization properties of gauge theory amplitudes and cross sections at subleading power. As one example, our basis of operators can be used to analytically compute power corrections for N -jettiness subtractions for gg induced color singlet production at the LHC.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1408447
Journal Information:
Journal of High Energy Physics (Online), Vol. 2017, Issue 7; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (8)

Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading power journal November 2019
Impact of isolation and fiducial cuts on qT and N-jettiness subtractions text January 2020
Universality of next-to-leading power threshold effects for colourless final states in hadronic collisions text January 2017
Impact of Isolation and Fiducial Cuts on $q_T$ and N-Jettiness Subtractions text January 2019
A Complete Basis of Helicity Operators for Subleading Factorization text January 2017
Next-to-leading-logarithmic power corrections for $N$-jettiness subtraction in color-singlet production text January 2018
Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading power text January 2019
Leading-logarithmic threshold resummation of Higgs production in gluon fusion at next-to-leading power text January 2019

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