Papers

Peer-reviewed
Dec, 2017

Non-perturbative determination of the A-parameter in the pure SU(3) gauge theory from the twisted gradient flow coupling

JOURNAL OF HIGH ENERGY PHYSICS
  • Ken-Ichi Ishikawa
  • ,
  • Issaku Kanamori
  • ,
  • Yuko Murakami
  • ,
  • Ayaka Nakamura
  • ,
  • Masanori Okawa
  • ,
  • Ryoichiro Ueno

Volume
1712
Number
12
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1007/JHEP12(2017)067
Publisher
SPRINGER

We evaluate the Lambda-parameter in the (MS) over bar scheme for the pure SU(3) gauge theory with the twisted gradient flow (TGF) method. A running coupling constant g(TGF)(2)(1/L) is defined in a finite volume box with size of L-4 with the twisted boundary condition. This defines the TGF scheme. Using the step scaling method for the TGF coupling with lattice simulations, we can evaluate the Lambda-parameter non-perturbatively in the TGF scheme. In this paper we determine the dimensionless ratios, Lambda(TGF)/root sigma and r(0)Lambda(TGF) together with the Lambda-parameter ratio Lambda(SF)/Lambda(TGF) on the lattices numerically. Combined with the known ratio Lambda((MS) over bar)/Lambda(SF), we obtain Lambda((MS) over bar)/Lambda root sigma = 0.5315(81)((+269)(-48)) and ro Lambda((MS) over bar) = 0.6062(92)((+309)(-52)), where the first error is statistical one and the second is our estimate of systematic uncertainty.

Link information
DOI
https://doi.org/10.1007/JHEP12(2017)067
arXiv
http://arxiv.org/abs/arXiv:1702.06289
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000418272300002&DestApp=WOS_CPL
URL
http://arxiv.org/abs/1702.06289v1
ID information
  • DOI : 10.1007/JHEP12(2017)067
  • ISSN : 1029-8479
  • arXiv ID : arXiv:1702.06289
  • Web of Science ID : WOS:000418272300002

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