N -jettiness subtractions for g g → H at subleading power

Moult, Ian; Rothen, Lorena; Stewart, Iain W.; Tackmann, Frank J.; Zhu, Hua Xing

doi:10.1103/PhysRevD.97.014013

Title: $N$ -jettiness subtractions for $g g \to H$ at subleading power

Abstract

N -jettiness subtractions provide a general approach for performing fully-differential next-to-next-to-leading order (NNLO) calculations. Since they are based on the physical resolution variable N -jettiness, T_N, subleading power corrections in τ =T_N/Q, with Q a hard interaction scale, can also be systematically computed. We study the structure of power corrections for 0-jettiness, T₀, for the gg → H process. Using the soft-collinear effective theory we analytically compute the leading power corrections α_sτlnτ and α$$2\atop{s}$$τln³τ (finding partial agreement with a previous result in the literature), and perform a detailed numerical study of the power corrections in the gg, gq, and $$q\overline{q}$$ channels. This includes a numerical extraction of the α_sτ and α$$2\atop{s}$$sτln²τ corrections, and a study of the dependence on the T₀ definition. Including such power suppressed logarithms significantly reduces the size of missing power corrections, and hence improves the numerical efficiency of the subtraction method. Having a more detailed understanding of the power corrections for both $$q\overline{q}$$ and gg initiated processes also provides insight into their universality, and hence their behavior in more complicated processes where they have not yet been analytically calculated.

Authors:: Moult, Ian; Rothen, Lorena; Stewart, Iain W.; Tackmann, Frank J.; Zhu, Hua Xing

Publication Date:: Wed Jan 24 00:00:00 EST 2018

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1417927

Alternate Identifier(s):: OSTI ID: 1485073

Grant/Contract Number:: SC0011090; AC02-05CH11231

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 1; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Moult, Ian, Rothen, Lorena, Stewart, Iain W., Tackmann, Frank J., and Zhu, Hua Xing. N -jettiness subtractions for g g → H at subleading power.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevD.97.014013.

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                    Moult, Ian, Rothen, Lorena, Stewart, Iain W., Tackmann, Frank J., & Zhu, Hua Xing. N -jettiness subtractions for g g → H at subleading power.  United States.  https://doi.org/10.1103/PhysRevD.97.014013

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                    Moult, Ian, Rothen, Lorena, Stewart, Iain W., Tackmann, Frank J., and Zhu, Hua Xing. Wed .  
"N -jettiness subtractions for g g → H at subleading power".  United States.  https://doi.org/10.1103/PhysRevD.97.014013.

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@article{osti_1417927,

  title        = {N -jettiness subtractions for g g → H at subleading power},

  author       = {Moult, Ian and Rothen, Lorena and Stewart, Iain W. and Tackmann, Frank J. and Zhu, Hua Xing},

  abstractNote = {N -jettiness subtractions provide a general approach for performing fully-differential next-to-next-to-leading order (NNLO) calculations. Since they are based on the physical resolution variable N -jettiness, TN, subleading power corrections in τ =TN/Q, with Q a hard interaction scale, can also be systematically computed. We study the structure of power corrections for 0-jettiness, T0, for the gg → H process. Using the soft-collinear effective theory we analytically compute the leading power corrections αsτlnτ and α$2\atop{s}$τln3τ (finding partial agreement with a previous result in the literature), and perform a detailed numerical study of the power corrections in the gg, gq, and $q\overline{q}$ channels. This includes a numerical extraction of the αsτ and α$2\atop{s}$sτln2τ corrections, and a study of the dependence on the T0 definition. Including such power suppressed logarithms significantly reduces the size of missing power corrections, and hence improves the numerical efficiency of the subtraction method. Having a more detailed understanding of the power corrections for both $q\overline{q}$ and gg initiated processes also provides insight into their universality, and hence their behavior in more complicated processes where they have not yet been analytically calculated.},

  doi          = {10.1103/PhysRevD.97.014013},

  journal      = {Physical Review D},

  number       = 1,

  volume       = 97,

  place        = {United States},

  year         = {Wed Jan 24 00:00:00 EST 2018},

  month        = {Wed Jan 24 00:00:00 EST 2018}

}

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