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Title: A complete basis of helicity operators for subleading factorization

Abstract

Factorization theorems underly our ability to make predictions for many processes involving the strong interaction. Although typically formulated at leading power, the study of factorization at subleading power is of interest both for improving the precision of calculations, as well as for understanding the all orders structure of QCD. We use the SCET helicity operator formalism to construct a complete power suppressed basis of hard scattering operators for e +e - → dijets, e -p → e - jet, and constrained Drell-Yan, including the first two subleading orders in the amplitude level power expansion. We analyze the field content of the jet and soft function contributions to the power suppressed cross section for e +e - → dijet event shapes, and give results for the lowest order matching to the contributing operators. These results will be useful for studies of power corrections both in fixed order and resummed perturbation theory.

Authors:
 [1];  [2];  [3];  [2]
  1. Harvard Univ., Cambridge, MA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1485067
Grant/Contract Number:  
AC02-05CH11231; SCD011090
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 11; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jets; QCD Phenomenology

Citation Formats

Feige, Ilya, Kolodrubetz, Daniel W., Moult, Ian, and Stewart, Iain W. A complete basis of helicity operators for subleading factorization. United States: N. p., 2017. Web. doi:10.1007/jhep11(2017)142.
Feige, Ilya, Kolodrubetz, Daniel W., Moult, Ian, & Stewart, Iain W. A complete basis of helicity operators for subleading factorization. United States. doi:10.1007/jhep11(2017)142.
Feige, Ilya, Kolodrubetz, Daniel W., Moult, Ian, and Stewart, Iain W. Wed . "A complete basis of helicity operators for subleading factorization". United States. doi:10.1007/jhep11(2017)142. https://www.osti.gov/servlets/purl/1485067.
@article{osti_1485067,
title = {A complete basis of helicity operators for subleading factorization},
author = {Feige, Ilya and Kolodrubetz, Daniel W. and Moult, Ian and Stewart, Iain W.},
abstractNote = {Factorization theorems underly our ability to make predictions for many processes involving the strong interaction. Although typically formulated at leading power, the study of factorization at subleading power is of interest both for improving the precision of calculations, as well as for understanding the all orders structure of QCD. We use the SCET helicity operator formalism to construct a complete power suppressed basis of hard scattering operators for e+e- → dijets, e-p → e- jet, and constrained Drell-Yan, including the first two subleading orders in the amplitude level power expansion. We analyze the field content of the jet and soft function contributions to the power suppressed cross section for e+e- → dijet event shapes, and give results for the lowest order matching to the contributing operators. These results will be useful for studies of power corrections both in fixed order and resummed perturbation theory.},
doi = {10.1007/jhep11(2017)142},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2017,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 20 works
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Figures / Tables:

Figure 1 Figure 1: Examples of the contributions to thrust, τ , in the dijet limit, at leading power in (a) and (b), and subleading power in (c) and (d). There is an extra collinear gluon in (a) from splitting, and in (b) there is an extra gluon from soft emission. Inmore » (c) the extra energetic gluon is collinear with the quark, but occurs without a nearly onshell parent propagator. Likewise in (d) the extra soft emission amplitude is subleading.« less

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    Works referencing / citing this record:

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