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Title: A subleading power operator basis for the scalar quark current

Journal Article · · Journal of High Energy Physics (Online)

Factorization theorems play a crucial role in our understanding of the strong interaction. For collider processes they are typically formulated at leading power and much less is known about power corrections in the λ << 1 expansion. Here we present a complete basis of power suppressed operators for a scalar quark current at O(λ2) in the amplitude level power expansion in the Soft Collinear Effective Theory, demonstrating that helicity selection rules significantly simplify the construction. This basis applies for the production of any color singlet scalar in qq¯¯ annihilation (such as bb¯¯→H ). We also classify all operators which contribute to the cross section at O(λ2) and perform matching calculations to determine their tree level Wilson coefficients. Furthermore, these results can be exploited to study power corrections in both resummed and fixed order perturbation theory, and for analyzing the factorization properties of gauge theory amplitudes and cross sections at subleading power.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0011090
OSTI ID:
1501476
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 4; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (7)

On next-to-leading power threshold corrections in Drell-Yan production at N3LO journal October 2018
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
Subleading Power Rapidity Divergences and Power Corrections for $q_T$ text January 2019
Subleading Power Rapidity Divergences and Power Corrections for $q_T$ text January 2018
Impact of Isolation and Fiducial Cuts on $q_T$ and N-Jettiness Subtractions text January 2019
Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading power text January 2019

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