A subleading power operator basis for the scalar quark current

Chang, Cyuan -Han; Stewart, Iain W.; Vita, Gherardo

doi:10.1007/jhep04(2018)041

A subleading power operator basis for the scalar quark current

Journal Article · Mon Apr 09 00:00:00 EDT 2018 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep04(2018)041· OSTI ID:1501476

Chang, Cyuan -Han ^[1]; Stewart, Iain W. ^[2]; ^[2]

Massachusetts Inst. of Technology, Cambridge, MA (United States). Center for Theoretical Physics; Massachusetts Inst. of Technology, Cambridge (United States)
Massachusetts Inst. of Technology, Cambridge, MA (United States). Center for Theoretical Physics

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.

View Accepted Manuscript (DOE)

Research Organization:: Massachusetts Inst. of Technology, Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0011090

OSTI ID:: 1501476

Alternate ID(s):: OSTI ID: 22739396

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 4 Vol. 2018; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Impact of Isolation and Fiducial Cuts on $q_T$ and N-Jettiness Subtractions Ebert, Markus A.; Tackmann, Frank J. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-00411	text	January 2019
Impact of isolation and fiducial cuts on qT and N-jettiness subtractions Ebert, Markus A.; Tackmann, Frank J. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-01355	text	January 2020
Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading power Bahjat-Abbas, N.; Bonocore, D.; Damsté, J. Sinninghe arXiv https://doi.org/10.48550/arxiv.1905.13710	text	January 2019

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