2017年12月
Non-perturbative determination of the $Λ$-parameter in the pure SU(3) gauge theory from the twisted gradient flow coupling
JHEP
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- 巻
- 1712
- 号
- 12
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/JHEP12(2017)067
We evaluate the $\Lambda$-parameter in the $\overline{\mathrm{MS } }$ scheme<br />
for the pure SU(3) gauge theory with the twisted gradient flow (TGF) method. A<br />
running coupling constant $g_{\mathrm{TGF } }^2(1/L)$ is defined in a finite<br />
volume box with size of $L^4$ with the twisted boundary condition. This defines<br />
the TGF scheme. Using the step scaling method for the TGF coupling with lattice<br />
simulations, we can evaluate the $\Lambda$-parameter non-perturbatively in the<br />
TGF scheme. In this paper we determine the dimensionless ratios,<br />
$\Lambda_{\mathrm{TGF } }/\sqrt{\sigma}$ and $r_{0}\Lambda_{\mathrm{TGF } }$<br />
together with the $\Lambda$-parameter ratio<br />
$\Lambda_{\mathrm{SF } }/\Lambda_{\mathrm{TGF } }$ on the lattices numerically.<br />
Combined with the known ratio<br />
$\Lambda_{\overline{\mathrm{MS } }}/\Lambda_{\mathrm{SF } }$, we obtain<br />
$\Lambda_{\overline{\mathrm{MS } }}/\sqrt{\sigma} = 0.517(10)(^{+8}_{-7})$ and<br />
$r_{0}\Lambda_{\overline{\mathrm{MS } }}=0.593(12)(^{+12}_{-9})$, where the first<br />
error is statistical one and the second is our estimate of systematic<br />
uncertainty.
for the pure SU(3) gauge theory with the twisted gradient flow (TGF) method. A<br />
running coupling constant $g_{\mathrm{TGF } }^2(1/L)$ is defined in a finite<br />
volume box with size of $L^4$ with the twisted boundary condition. This defines<br />
the TGF scheme. Using the step scaling method for the TGF coupling with lattice<br />
simulations, we can evaluate the $\Lambda$-parameter non-perturbatively in the<br />
TGF scheme. In this paper we determine the dimensionless ratios,<br />
$\Lambda_{\mathrm{TGF } }/\sqrt{\sigma}$ and $r_{0}\Lambda_{\mathrm{TGF } }$<br />
together with the $\Lambda$-parameter ratio<br />
$\Lambda_{\mathrm{SF } }/\Lambda_{\mathrm{TGF } }$ on the lattices numerically.<br />
Combined with the known ratio<br />
$\Lambda_{\overline{\mathrm{MS } }}/\Lambda_{\mathrm{SF } }$, we obtain<br />
$\Lambda_{\overline{\mathrm{MS } }}/\sqrt{\sigma} = 0.517(10)(^{+8}_{-7})$ and<br />
$r_{0}\Lambda_{\overline{\mathrm{MS } }}=0.593(12)(^{+12}_{-9})$, where the first<br />
error is statistical one and the second is our estimate of systematic<br />
uncertainty.
- リンク情報
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- 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情報
-
- DOI : 10.1007/JHEP12(2017)067
- ISSN : 1029-8479
- arXiv ID : arXiv:1702.06289
- Web of Science ID : WOS:000418272300002