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Title: Study of weak corrections to Drell-Yan, top-quark pair, and dijet production at high energies with MCFM

Abstract

Electroweak (EW) corrections can be enhanced at high energies due to the soft or collinear radiation of virtual and real W and Z bosons that result in Sudakov-like corrections of the form α$$l\atop{W}$$logn(Q2/M2$$\atop{W,Z}$$), where αW=α/(4π sin2θW) and n ≤ 2l-1. The inclusion of EW corrections in predictions for hadron colliders is, therefore, especially important when searching for signals of possible new physics in distributions probing the kinematic regime Q2>>M$$2\atop{V}$$. Next-to-leading order (NLO) EW corrections should also be taken into account when their size [O(α)] is comparable to that of QCD corrections at next-to-next-to-leading order (NNLO) [O(α$$2\atop{s}$$)]. To this end, we have implemented the NLO weak corrections to the neutral-current Drell-Yan process, top-quark pair production and dijet production in the parton-level Monte Carlo program MCFM. This enables a combined study with the corresponding QCD corrections at NLO and NNLO. We provide both the full NLO weak corrections and their Sudakov approximation since the latter is often used for a fast evaluation of weak effects at high energies and can be extended to higher orders. Finally, with both the exact and approximate results at hand, the validity of the Sudakov approximation can be readily quantified.

Authors:
ORCiD logo [1];  [2];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); The State Univ. of New York, Buffalo, NY (United States)
  3. The State Univ. of New York, Buffalo, NY (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1331121
Alternate Identifier(s):
OSTI ID: 1333767
Report Number(s):
FERMILAB-PUB-16-314-T; arXiv:1608.03356
Journal ID: ISSN 2470-0010; PRVDAQ; 1480864
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 9; 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

Campbell, John M., Wackeroth, Doreen, and Zhou, Jia. Study of weak corrections to Drell-Yan, top-quark pair, and dijet production at high energies with MCFM. United States: N. p., 2016. Web. https://doi.org/10.1103/PhysRevD.94.093009.
Campbell, John M., Wackeroth, Doreen, & Zhou, Jia. Study of weak corrections to Drell-Yan, top-quark pair, and dijet production at high energies with MCFM. United States. https://doi.org/10.1103/PhysRevD.94.093009
Campbell, John M., Wackeroth, Doreen, and Zhou, Jia. Tue . "Study of weak corrections to Drell-Yan, top-quark pair, and dijet production at high energies with MCFM". United States. https://doi.org/10.1103/PhysRevD.94.093009. https://www.osti.gov/servlets/purl/1331121.
@article{osti_1331121,
title = {Study of weak corrections to Drell-Yan, top-quark pair, and dijet production at high energies with MCFM},
author = {Campbell, John M. and Wackeroth, Doreen and Zhou, Jia},
abstractNote = {Electroweak (EW) corrections can be enhanced at high energies due to the soft or collinear radiation of virtual and real W and Z bosons that result in Sudakov-like corrections of the form α$l\atop{W}$logn(Q2/M2$\atop{W,Z}$), where αW=α/(4π sin2θW) and n ≤ 2l-1. The inclusion of EW corrections in predictions for hadron colliders is, therefore, especially important when searching for signals of possible new physics in distributions probing the kinematic regime Q2>>M$2\atop{V}$. Next-to-leading order (NLO) EW corrections should also be taken into account when their size [O(α)] is comparable to that of QCD corrections at next-to-next-to-leading order (NNLO) [O(α$2\atop{s}$)]. To this end, we have implemented the NLO weak corrections to the neutral-current Drell-Yan process, top-quark pair production and dijet production in the parton-level Monte Carlo program MCFM. This enables a combined study with the corresponding QCD corrections at NLO and NNLO. We provide both the full NLO weak corrections and their Sudakov approximation since the latter is often used for a fast evaluation of weak effects at high energies and can be extended to higher orders. Finally, with both the exact and approximate results at hand, the validity of the Sudakov approximation can be readily quantified.},
doi = {10.1103/PhysRevD.94.093009},
journal = {Physical Review D},
number = 9,
volume = 94,
place = {United States},
year = {2016},
month = {11}
}

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