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Title: Leading-color fully differential two-loop soft corrections to QCD dipole showers

Abstract

Here, we compute the next-to-leading order corrections to soft-gluon radiation differentially in the one-emission phase space. We show that their contribution to the evolution of color dipoles can be obtained in a modified subtraction scheme, such that both one- and two-emission terms are amenable to Monte-Carlo integration. The two-loop cusp anomalous dimension is recovered naturally upon integration over the full phase space. We present two independent implementations of the new algorithm in the two event generators Pythia and Sherpa, and we compare the resulting fully differential simulation to the CMW scheme.

Authors:
 [1];  [1];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1478557
Alternate Identifier(s):
OSTI ID: 1439460; OSTI ID: 1444031
Report Number(s):
SLAC-PUB-17252; FERMILAB-PUB-18-147-T; MCNET-18-09; arXiv:1805.03757
Journal ID: ISSN 2470-0010; PRVDAQ; 1672514; TRN: US1900615
Grant/Contract Number:  
AC02-07CH11359; AC02-76SF00515
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 98; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Dulat, Falko, Höche, Stefan, and Prestel, Stefan. Leading-color fully differential two-loop soft corrections to QCD dipole showers. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.074013.
Dulat, Falko, Höche, Stefan, & Prestel, Stefan. Leading-color fully differential two-loop soft corrections to QCD dipole showers. United States. doi:10.1103/PhysRevD.98.074013.
Dulat, Falko, Höche, Stefan, and Prestel, Stefan. Tue . "Leading-color fully differential two-loop soft corrections to QCD dipole showers". United States. doi:10.1103/PhysRevD.98.074013.
@article{osti_1478557,
title = {Leading-color fully differential two-loop soft corrections to QCD dipole showers},
author = {Dulat, Falko and Höche, Stefan and Prestel, Stefan},
abstractNote = {Here, we compute the next-to-leading order corrections to soft-gluon radiation differentially in the one-emission phase space. We show that their contribution to the evolution of color dipoles can be obtained in a modified subtraction scheme, such that both one- and two-emission terms are amenable to Monte-Carlo integration. The two-loop cusp anomalous dimension is recovered naturally upon integration over the full phase space. We present two independent implementations of the new algorithm in the two event generators Pythia and Sherpa, and we compare the resulting fully differential simulation to the CMW scheme.},
doi = {10.1103/PhysRevD.98.074013},
journal = {Physical Review D},
issn = {2470-0010},
number = 7,
volume = 98,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.98.074013

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Leading order contributions to dipole-shower evolution in the soft limit. The double solid lines represent hard (identified) partons i.e. Wilson lines.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.