skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: QCD Coupling from a Nonperturbative Determination of the Three-Flavor Λ Parameter

Abstract

We present a lattice determination of the Λ parameter in three-flavor QCD and the strong coupling at the Z pole mass. Computing the nonperturbative running of the coupling in the range from 0.2 to 70 GeV, and using experimental input values for the masses and decay constants of the pion and the kaon, we obtain Λ(3)MS=341(12) MeV. The nonperturbative running up to very high energies guarantees that systematic effects associated with perturbation theory are well under control. Using the four-loop prediction for Λ(5)MS/Λ(3)MS yields α(5)MS(mZ)=0.11852(84).

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
ALPHA Collaboration
OSTI Identifier:
1380060
Alternate Identifier(s):
OSTI ID: 1426437
Report Number(s):
BNL-114486-2017-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
SC0012704
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 10; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Bruno, Mattia, Brida, Mattia Dalla, Fritzsch, Patrick, Korzec, Tomasz, Ramos, Alberto, Schaefer, Stefan, Simma, Hubert, Sint, Stefan, and Sommer, Rainer. QCD Coupling from a Nonperturbative Determination of the Three-Flavor Λ Parameter. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.102001.
Bruno, Mattia, Brida, Mattia Dalla, Fritzsch, Patrick, Korzec, Tomasz, Ramos, Alberto, Schaefer, Stefan, Simma, Hubert, Sint, Stefan, & Sommer, Rainer. QCD Coupling from a Nonperturbative Determination of the Three-Flavor Λ Parameter. United States. doi:10.1103/PhysRevLett.119.102001.
Bruno, Mattia, Brida, Mattia Dalla, Fritzsch, Patrick, Korzec, Tomasz, Ramos, Alberto, Schaefer, Stefan, Simma, Hubert, Sint, Stefan, and Sommer, Rainer. Fri . "QCD Coupling from a Nonperturbative Determination of the Three-Flavor Λ Parameter". United States. doi:10.1103/PhysRevLett.119.102001.
@article{osti_1380060,
title = {QCD Coupling from a Nonperturbative Determination of the Three-Flavor Λ Parameter},
author = {Bruno, Mattia and Brida, Mattia Dalla and Fritzsch, Patrick and Korzec, Tomasz and Ramos, Alberto and Schaefer, Stefan and Simma, Hubert and Sint, Stefan and Sommer, Rainer},
abstractNote = {We present a lattice determination of the Λ parameter in three-flavor QCD and the strong coupling at the Z pole mass. Computing the nonperturbative running of the coupling in the range from 0.2 to 70 GeV, and using experimental input values for the masses and decay constants of the pion and the kaon, we obtain Λ(3)MS=341(12) MeV. The nonperturbative running up to very high energies guarantees that systematic effects associated with perturbation theory are well under control. Using the four-loop prediction for Λ(5)MS/Λ(3)MS yields α(5)MS(mZ)=0.11852(84).},
doi = {10.1103/PhysRevLett.119.102001},
journal = {Physical Review Letters},
number = 10,
volume = 119,
place = {United States},
year = {Fri Sep 08 00:00:00 EDT 2017},
month = {Fri Sep 08 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.119.102001

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

Save / Share: