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 Nucleon structure from 2+1 flavor lattice QCD near the physical point

2018 ◽  
Vol 175 ◽  
pp. 06007 ◽  
Author(s):  
Natsuki Tsukamoto ◽  
Ken-Ichi Ishikawa ◽  
Yoshinobu Kuramashi ◽  
Shoichi Sasaki ◽  
Takeshi Yamazaki
Keyword(s):  
Lattice Spacing ◽  
Pion Mass ◽  
Axial Vector ◽  
Form Factors ◽  
Nucleon Structure ◽  
Matrix Elements ◽  
Physical Point ◽  
Nucleon Form Factors ◽  
Pseudo Scalar ◽  
Simulation Point

We present an update on our results of nucleon form factors measured on a large-volume lattice (8:1fm)4 at almost the physical point in 2+1 flavor QCD. The configurations are generated with the stout-smeared O(a) improved Wilson quark action and Iwasaki gauge action at β = 1:82, which corresponds to the lattice spacing of 0.085 fm. The pion mass at the simulation point is about 145 MeV. We determine the isovector electric radius and magnetic moment from nucleon electric (GE) and magnetic (GM) form factors. We also report on preliminary results of the axial-vector (FA), induced pseudo-scalar (FP) and pseudo-scalar (GP) form factors in order to verify the axial Ward-Takahashi identity in terms of the nucleon matrix elements, which may be called as the generalized Goldberger-Treiman relation.

scholarly journals B → πlv with Möbius Domain Wall Fermions

2018 ◽  
Vol 175 ◽  
pp. 13004 ◽  
Author(s):  
Brian Colquhoun ◽  
Shoji Hashimoto ◽  
Takashi Kaneko
Keyword(s):  
Domain Wall ◽  
Lattice Spacing ◽  
Semileptonic Decay ◽  
Form Factors ◽  
Heavy Quarks ◽  
Ckm Matrix ◽  
Domain Wall Fermions ◽  
Heavy Quark Mass ◽  
The Status

We report on the status of our calculation of the exclusive semileptonic decay, B → πlv; a key process in the determination of the CKM matrix element |Vub|. The Möbius domain wall action is used for both light and heavy quarks on gauge ensembles that include the effects of 2 + 1 flavours of quarks in the sea at three values of the lattice spacing: a ≈ 0.08 fm, a ≈ 0.055 fm, and a ≈ 0.044 fm. Pion masses go down to 300 MeV while heavy quarks masses are as large as 2.44mc. We present preliminary results of form factors from this process, showing dependence on momentum transfer, lattice spacing, and the heavy quark mass.

scholarly journals Heavy Domain Wall Fermions: The RBC and UKQCD charm physics program

2018 ◽  
Vol 175 ◽  
pp. 13013
Author(s):  
Peter A Boyle ◽  
Luigi Del Debbio ◽  
Andreas Jüttner ◽  
Ava Khamseh ◽  
Justus Tobias Tsang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Quark Mass ◽  
Pion Mass ◽  
Charm Quark ◽  
Charm Physics ◽  
Decay Constants ◽  
Domain Wall Fermions ◽  
Charm Quark Mass ◽  
Physics Program ◽  
Set Up

We review the domain wall charm physics program of the RBC and UKQCD collaborations based on simulations including ensembles with physical pion mass. We summarise our current set-up and present a status update on the decay constants fD, fDs, the charm quark mass, heavy-light and heavy-strange bag parameters and the ratio ξ

scholarly journals Nucleon structure with two flavors of dynamical domain-wall fermions

2008 ◽  
Vol 78 (1) ◽  
Author(s):  
Huey-Wen Lin ◽  
Tom Blum ◽  
Shigemi Ohta ◽  
Shoichi Sasaki ◽  
Takeshi Yamazaki
Keyword(s):  
Domain Wall ◽  
Nucleon Structure ◽  
Domain Wall Fermions
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