scholarly journals Nucleon axial coupling from Lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 01008 ◽  
Author(s):  
Chia Cheng Chang ◽  
Amy Nicholson ◽  
Enrico Rinaldi ◽  
Evan Berkowitz ◽  
Nicolas Garron ◽  
...  
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Present State ◽  
Correlation Functions ◽  
State Of The Art ◽  
Gradient Flow ◽  
Relative Uncertainty ◽  
Domain Wall Fermions ◽  
Flow Algorithm ◽  
Point Correlation

We present state-of-the-art results from a lattice QCD calculation of the nucleon axial coupling, gA, using Möbius Domain-Wall fermions solved on the dynamical Nf = 2 + 1 + 1 HISQ ensembles after they are smeared using the gradient-flow algorithm. Relevant three-point correlation functions are calculated using a method inspired by the Feynman-Hellmann theorem, and demonstrate significant improvement in signal for fixed stochastic samples. The calculation is performed at five pion masses of mπ ~ {400, 350, 310, 220, 130} MeV, three lattice spacings of a ~ {0.15, 0.12, 0.09} fm, and we do a dedicated volume study with mπL ~ {3.22, 4.29, 5.36}. Control over all relevant sources of systematic uncertainty are demonstrated and quantified. We achieve a preliminary value of gA = 1.285(17), with a relative uncertainty of 1.33%.

scholarly journals GPU-Based Conjugate Gradient Solver for Lattice QCD with Domain-Wall Fermions

2011 ◽  
Author(s):  
Yao-Yuan Mao ◽  
Ting-Wai Chiu ◽  
Tung-Han Hsieh ◽  
Kenji Ogawa
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Conjugate Gradient ◽  
Domain Wall Fermions ◽  
Conjugate Gradient Solver

scholarly journals Chiral transition andU(1)Asymmetry restoration from lattice QCD using domain wall fermions

2012 ◽  
Vol 86 (9) ◽  
Author(s):  
A. Bazavov ◽  
Tanmoy Bhattacharya ◽  
Michael I. Buchoff ◽  
Michael Cheng ◽  
N. H. Christ ◽  
...  
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Domain Wall Fermions ◽  
Chiral Transition

scholarly journals Nucleon axial charge from quenched lattice QCD with domain wall fermions

2003 ◽  
Vol 68 (5) ◽  
Author(s):  
S. Sasaki ◽  
K. Orginos ◽  
S. Ohta ◽  
T. Blum
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Axial Charge ◽  
Domain Wall Fermions

scholarly journals Light-by-light forward scattering amplitudes in Lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 06030
Author(s):  
Antoine Gérardin ◽  
Jeremy Green ◽  
Oleksii Gryniuk ◽  
Georg von Hippel ◽  
Harvey B. Meyer ◽  
...  
Keyword(s):  
Scattering Amplitudes ◽  
Lattice Qcd ◽  
Cross Sections ◽  
Correlation Functions ◽  
Sum Rules ◽  
Form Factors ◽  
Forward Scattering ◽  
Meson Pole ◽  
Point Correlation ◽  
Dispersive Approach

We present our preliminary results on the calculation of hadronic light-by-light forward scattering amplitudes using vector four-point correlation functions computed on the lattice. Using a dispersive approach, forward scattering amplitudes can be described by γ*γ* → hadrons fusion cross sections and then compared with phenomenology. We show that only a few states are needed to reproduce our data. In particular, the sum rules considered in this study imply relations between meson–γγ couplings and provide valuable information about individual form factors which are often used to estimate the meson-pole contributions to the hadronic light-by-light contribution to the (g – 2) of the muon.

scholarly journals Decay constants and spectroscopy of mesons in lattice QCD using domain-wall fermions

2016 ◽  
Author(s):  
Brendan Fahy ◽  
Guido Cossu ◽  
Shoji Hashimoto ◽  
Takashi Kaneko ◽  
Junichi Noaki ◽  
...  
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Decay Constants ◽  
Domain Wall Fermions

HADRONIC STRUCTURE FROM LATTICE QCD

2005 ◽  
Vol 20 (19) ◽  
pp. 4554-4561
Author(s):  
Kostas Orginos
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Recent Progress ◽  
Structure Functions ◽  
Hadronic Structure ◽  
Domain Wall Fermions

I present some recent progress in lattice computations of moments of structure functions using domain wall fermions.

scholarly journals Topological susceptibility in 2+1 flavors lattice QCD with domain-wall fermions

2009 ◽  
Vol 671 (1) ◽  
pp. 135-138 ◽  
Author(s):  
Ting-Wai Chiu ◽  
Tung-Han Hsieh ◽  
Po-Kai Tseng
Keyword(s):  
Domain Wall ◽  
Lattice Qcd ◽  
Domain Wall Fermions
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