scholarly journals Setting the scale for nHYP fermions with the Lüscher-Weisz gauge action

2020 ◽  
Vol 102 (9) ◽  
Author(s):  
Hossein Niyazi ◽  
Andrei Alexandru ◽  
Frank X. Lee ◽  
Ruairí Brett
Keyword(s):  
Gauge Action

scholarly journals Electric Dipole Moment Results from lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 06018 ◽  
Author(s):  
Jack Dragos ◽  
Thomas Luu ◽  
Andrea Shindler ◽  
Jordy de Vries
Keyword(s):  
Renormalization Group ◽  
Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Gradient Flow ◽  
Gauge Fields ◽  
Electric Dipole Moments ◽  
Gauge Action ◽  
Promising Tool ◽  
Local Operators

We utilize the gradient flow to define and calculate electric dipole moments induced by the strong QCD θ-term and the dimension-6 Weinberg operator. The gradient flow is a promising tool to simplify the renormalization pattern of local operators. The results of the nucleon electric dipole moments are calculated on PACS-CS gauge fields (available from the ILDG) using Nf = 2+1, of discrete size 323×64 and spacing a ≃ 0.09 fm. These gauge fields use a renormalization-group improved gauge action and a nonperturbatively O(a) improved clover quark action at β = 1.90, with cSW = 1.715. The calculation is performed at pion masses of mπ ≃ 411, 701 MeV.

scholarly journals Gauge action improvement and smearing

2005 ◽  
Vol 172 (3) ◽  
pp. 163-186 ◽  
Author(s):  
Stephan Dürr
Keyword(s):  
Gauge Action

scholarly journals QUANTIZATION OF THE G-CONNECTIONS VIA THE TANGENT GROUPOID

2013 ◽  
Vol 10 (09) ◽  
pp. 1320016
Author(s):  
ALAN LAI
Keyword(s):  
Hilbert Space ◽  
Convolution Operators ◽  
Gauge Action ◽  
Dirac Type

A description of the space of G-connections using the tangent groupoid is given. As the tangent groupoid parameter is away from zero, the G-connections act as convolution operators on a Hilbert space. The gauge action is examined in the tangent groupoid description of the G-connections. Tetrads are formulated as Dirac type operators. The connection variables and tetrad variables in Ashtekar's gravity are presented as operators on a Hilbert space.

scholarly journals Baryon interactions from lattice QCD with physical quark masses – Nuclear forces and ΞΞ forces –

2018 ◽  
Vol 175 ◽  
pp. 05009 ◽  
Author(s):  
Takumi Doi ◽  
Takumi Iritani ◽  
Sinya Aoki ◽  
Shinya Gongyo ◽  
Tetsuo Hatsuda ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Nuclear Forces ◽  
Gauge Action ◽  
Quark Masses ◽  
Momentum Correlation ◽  
Coupled Channel ◽  
Ion Collision

We present the latest lattice QCD results for baryon interactions obtained at nearly physical quark masses. Nf = 2 + 1 nonperturbatively O(a)-improved Wilson quark action with stout smearing and Iwasaki gauge action are employed on the lattice of (96a)4 ≃(8.1fm)4 with a-1 ≃2.3 GeV, where mπ ≃146 MeV and mK ≃525 MeV. In this report, we study the two-nucleon systems and two-Ξ systems in 1S0 channel and 3S1-3D1 coupled channel, and extract central and tensor interactions by the HAL QCD method. We also present the results for the NΩ interaction in 5S2 channel which is relevant to the NΩ pair-momentum correlation in heavy-ion collision experiments.

scholarly journals Nucleon structure from 2+1-flavor domain-wall QCD

2018 ◽  
Vol 175 ◽  
pp. 06012 ◽  
Author(s):  
Shigemi Ohta
Keyword(s):  
Domain Wall ◽  
Lattice Spacing ◽  
Pion Mass ◽  
Form Factors ◽  
Nucleon Structure ◽  
Current Form ◽  
Gauge Action ◽  
Domain Wall Fermions ◽  
Quark Momentum ◽  
Structure Calculations

Nucleon-structure calculations of isovector vector-and axialvector-current form factors, transversity and scalar charge, and quark momentum and helicity fractions are reported from two recent 2+1-flavor dynamical domain-wall fermions lattice-QCD ensembles generated jointly by the RIKEN-BNL-Columbia and UKQCD Collaborations with Iwasaki × dislocation-suppressing-determinatn-ratio gauge action at inverse lattice spacing of 1.378(7) GeV and pion mass values of 249.4(3) and 172.3(3) MeV.

scholarly journals Leptonic decay constants for D-mesons from 3-flavour CLS ensembles

2018 ◽  
Vol 175 ◽  
pp. 13019
Author(s):  
Sara Collins ◽  
Kevin Eckert ◽  
Jochen Heitger ◽  
Stefan Hofmann ◽  
Wolfgang Söldner
Keyword(s):  
Large Volume ◽  
D Mesons ◽  
Leptonic Decay ◽  
Tree Level ◽  
Open Boundary ◽  
Open Boundary Conditions ◽  
Gauge Action ◽  
Decay Constants ◽  
Ongoing Effort ◽  
The Status

e report on the status of an ongoing effort by the RQCD and ALPHA Collaborations, aimed at determining leptonic decay constants of charmed mesons. Our analysis is based on large-volume ensembles generated within the CLS effort, employing Nf = 2 + 1 non-perturbatively O(a) improved Wilson quarks, tree-level Symanzik-improved gauge action and open boundary conditions. The ensembles cover lattice spac-ings from a ≈ 0.09 fm to a ≈ 0.05 fm, with pion masses varied from 420 to 200 MeV. To extrapolate to the physical masses, we follow both the (2ml + ms) = const. and the ms = const. lines in parameter space.

Twistor bundles and gauge action principles of gravitation

1982 ◽  
Vol 23 (8) ◽  
pp. 1471-1488 ◽  
Author(s):  
C. P. Luehr ◽  
M. Rosenbaum P.
Keyword(s):  
Gauge Action ◽  
Twistor Bundles
Sign in / Sign up

Export Citation Format

Share Document