Top quark decay at next-to-leading order in the standard model effective field theory
Abstract
We consider top quark decay in the Standard Model Effective Field Theory (SMEFT). We present a calculation of the total decay width and the W-boson helicity fractions at next-to-leading order (NLO) in SMEFT. Our result includes the complete set of contributing four-fermion operators in addition to QCD dipole operators and bottom-mass suppressed effects. We show that operators that first appear at NLO in the SMEFT can be bounded by the current data as well as future data from both a high-luminosity LHC and a potential e+e– collider, demonstrating the importance of going beyond leading order when studying the SMEFT. We discuss technical aspects of our calculation that we believe will be useful in future higher-order studies of the SMEFT, in particular the treatment of γ5 in loop diagrams.
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- OSTI Identifier:
- 1567865
- Alternate Identifier(s):
- OSTI ID: 1574364
- Grant/Contract Number:
- AC02-06CH11357; FG02-91ER40684
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 5; 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
Boughezal, Radja, Chen, Chien-Yi, Petriello, Frank, and Wiegand, Daniel. Top quark decay at next-to-leading order in the standard model effective field theory. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.056023.
Boughezal, Radja, Chen, Chien-Yi, Petriello, Frank, & Wiegand, Daniel. Top quark decay at next-to-leading order in the standard model effective field theory. United States. https://doi.org/10.1103/PhysRevD.100.056023
Boughezal, Radja, Chen, Chien-Yi, Petriello, Frank, and Wiegand, Daniel. Mon .
"Top quark decay at next-to-leading order in the standard model effective field theory". United States. https://doi.org/10.1103/PhysRevD.100.056023.
@article{osti_1567865,
title = {Top quark decay at next-to-leading order in the standard model effective field theory},
author = {Boughezal, Radja and Chen, Chien-Yi and Petriello, Frank and Wiegand, Daniel},
abstractNote = {We consider top quark decay in the Standard Model Effective Field Theory (SMEFT). We present a calculation of the total decay width and the W-boson helicity fractions at next-to-leading order (NLO) in SMEFT. Our result includes the complete set of contributing four-fermion operators in addition to QCD dipole operators and bottom-mass suppressed effects. We show that operators that first appear at NLO in the SMEFT can be bounded by the current data as well as future data from both a high-luminosity LHC and a potential e+e– collider, demonstrating the importance of going beyond leading order when studying the SMEFT. We discuss technical aspects of our calculation that we believe will be useful in future higher-order studies of the SMEFT, in particular the treatment of γ5 in loop diagrams.},
doi = {10.1103/PhysRevD.100.056023},
journal = {Physical Review D},
number = 5,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}
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https://doi.org/10.1103/PhysRevD.100.056023
https://doi.org/10.1103/PhysRevD.100.056023
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Cited by: 14 works
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