Explanipedia

Properties of the ρ Resonance from ππ Elastic Scattering and the Spectrum of Excited ρ Mesons Using the Stochastic LapH Method in Lattice QCD Open

Brendan Fahy · 2018

Inclusion of multi-meson operators allows lattice QCD calculations to extract energies of resonances above two-meson thresholds, as well as to study two-meson scattering. Previously, temporal correlations involving multi-hadron operators w…

Lattice calculation of coordinate-space vector and axial-vector current correlators in QCD Open

Masaaki Tomii, Guido Cossu, Brendan Fahy, Hidenori Fukaya, S. Hashimoto , et al. · 2017

We study the vector and axial-vector current correlators in perturbative and non-perturbative regimes of QCD. The correlators in Euclidean coordinate space are calculated on the lattice using the M\"obius domain-wall fermion formulation at…

Lattice calculation of vector and axial-vector current correlators in QCD Open

Masaaki Tomii, Guido Cossu, Brendan Fahy, Hidenori Fukaya, S. Hashimoto , et al. · 2017

Determination of charm quark mass from temporal moments of charmonium correlator with Mobius domain-wall fermion Open

Katsumasa Nakayama, Brendan Fahy, S. Hashimoto · 2017

We extract the charm quark mass and the strong coupling constant from the charmonium cur- rent correlators calculated with $n_f$ = 2 + 1 Mobius domain wall fermions. We match our lattice calculation for the temporal moments of the correlat…

Approaching the bottom using fine lattices with Domain-wall fermions. Open

Brendan Fahy, S. Hashimoto, Guido Cossu · 2017

We explore the heavy-quark mass region above the charm mass using M\"obius domain-wall fermions on fine lattices at $a = 0.080$, $0.055$, and $0.044$ fm. We examine masses and decay constants using a series of heavy quark masses up to 3 ti…

Approaching the Bottom Using Fine Lattices With Domain-Wall Fermions Open

Brendan Fahy, Guido Cossu, S. Hashimoto · 2017

We explore the heavy-quark mass region above the charm mass using Möbius domain-wall fermions on fine lattices at $a = 0.080$, $0.055$, and $0.044$ fm. We examine masses and decay constants using a series of heavy quark masses up to 3 time…

Determination of charm quark mass from temporal moments of charmonium correlator with Mobius domain-wall fermion Open

Katsumasa Nakayama, Brendan Fahy, S. Hashimoto · 2017

We extract the charm quark mass and the strong coupling constant from the charmonium current correlators calculated with $n_f = 2 + 1$ Mobius domain wall fermions. We match our lattice calculation for the temporal moments of the correlator…

$D$ meson semileptonic decays in lattice QCD with Möbius domain-wall quarks Open

T. Kaneko, Brendan Fahy, Hidenori Fukaya, S. Hashimoto · 2017

We report on our study of the D meson semileptonic decays in 2+1 flavor lattice QCD. Gauge ensembles are generated at three lattice cutoffs up to 4.5 GeV and with pion masses as low as 300 MeV. We employ the Moebius domain-wall fermion act…

D meson semileptonic decays in lattice QCD with Moebius domain-wall quarks Open

JLQCD Collaboration, T. Kaneko, Brendan Fahy, Hidenori Fukaya, S. Hashimoto · 2017

We report on our study of the D meson semileptonic decays in 2+1 flavor lattice QCD. Gauge ensembles are generated at three lattice cutoffs up to 4.5 GeV and with pion masses as low as 300 MeV. We employ the Moebius domain-wall fermion act…

Short-distance charmonium correlator on the lattice with Möbius domain-wall fermion and a determination of charm quark mass Open

Katsumasa Nakayama, Brendan Fahy, S. Hashimoto · 2016

We calculate charmonium correlators on the lattice with 2+1-flavors of sea\nquarks and charm valence quark both described by the M\\"obius domain-wall\nfermion. Temporal moments of the correlators are calculated and matched to\nperturbativ…

Renormalization of domain-wall bilinear operators with short-distance current correlators Open

Masaaki Tomii, Guido Cossu, Brendan Fahy, Hidenori Fukaya, S. Hashimoto , et al. · 2016

We determine the renormalization constants for flavor non-singlet fermion bilinear operators of M\"obius domain-wall fermions. The renormalization condition is imposed on the correlation functions in the coordinate space, such that the non…

I= 1 and I= 2 π–π scattering phase shifts from Nf= 2 + 1 lattice QCD Open

John Bulava, Brendan Fahy, Ben Hörz, Keisuke Jimmy Juge, Colin Morningstar , et al. · 2016

Pion-pion scattering and the timelike pion form factor from $N_f=2+1$ lattice QCD simulations using the stochastic LapH method Open

John Bulava, Ben Hörz, Brendan Fahy, Keisuke Jimmy Juge, Colin Morningstar , et al. · 2016

We report on progress applying the stochastic LapH method to estimate all-to-all propagators required in correlation functions of multi-hadron operators relevant for pion-pion scattering.Largevolume results for I = 2 and I = 1 pion-pion sc…

Charmonium current-current correlators with Mobius domain-wall fermion Open

Katsumasa Nakayama, Brendan Fahy, S. Hashimoto · 2016

We calculate the charmonium correlators on the lattice with n f = 2 + 1 Moebius domain wall fermion, and extract the charm quark mass and the strong coupling constant.Time moments are defined by current-current correlators, which have been…

Analysis of short distance current correlators using OPE Open

Masaaki Tomii, Brendan Fahy, Guido Cossu, Hidenori Fukaya, S. Hashimoto , et al. · 2016

We investigate the correlators of flavor non-singlet bilinear operators calculated on the lattice at short distances.In the continuum theory, non-perturbative effects are encoded in the form of the operator product expansion (OPE).We test …

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

Brendan Fahy, Guido Cossu, S. Hashimoto, T. Kaneko, Junichi Noaki , et al. · 2016

We report results of masses and decay constants of light and charmed pseudo-scalar mesons using lattice QCD with Möbius domain-wall fermions.Using this formulation we are able to compute pseudo-scalar decay constants through the pseudo-sca…

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

Brendan Fahy, Guido Cossu, S. Hashimoto, T. Kaneko, J. Noaki , et al. · 2015

We report results of masses and decay constants of light and charmed pseudo-scalar mesons using lattice QCD with Möbius domain-wall fermions. Using this formulation we are able to compute pseudo-scalar decay constants through the pseudo-sc…

Charmonium current-current correlators with Mobius domain-wall fermion Open

Katsumasa Nakayama, Brendan Fahy, S. Hashimoto · 2015

We calculate the charmonium correlators on the lattice with $n_f = 2+ 1$ Moebius domain wall fermion, and extract the charm quark mass and the strong coupling constant. Time moments are defined by current-current correlators, which have be…

Analysis of short-distance current correlators using OPE Open

Masaaki Tomii, Guido Cossu, Brendan Fahy, Hidenori Fukaya, S. Hashimoto , et al. · 2015

We investigate the correlators of flavor non-singlet bilinear operators calculated on the lattice at short distances. In the continuum theory, non-perturbative effects are encoded in the form of the operator product expansion (OPE). We tes…

Pion-pion scattering and the timelike pion form factor from $N_{\mathrm{f}} = 2+1$ lattice QCD simulations using the stochastic LapH method Open

John Bulava, Ben Hörz, Brendan Fahy, Keisuke Jimmy Juge, Colin Morningstar , et al. · 2015

We report on progress applying the stochastic LapH method to estimate all-to-all propagators required in correlation functions of multi-hadron operators relevant for pion-pion scattering. Large-volume results for $I=2$ and $I=1$ pion-pion …

Pion-pion scattering and the timelike pion form factor from\n $N_{\\mathrm{f}} = 2+1$ lattice QCD simulations using the stochastic LapH\n method Open

John Bulava, Ben Hörz, Brendan Fahy, K. J. Juge, Colin Morningstar , et al. · 2015

We report on progress applying the stochastic LapH method to estimate\nall-to-all propagators required in correlation functions of multi-hadron\noperators relevant for pion-pion scattering. Large-volume results for $I=2$ and\n$I=1$ pion-pi…

Excited-state energies and scattering phase shifts from lattice QCD with the stochastic LapH method Open

Colin Morningstar, John Bulava, Brendan Fahy, Jacob Fallica, Andrew D. Hanlon , et al. · 2015

Recent results in computing excited-state energies and meson-meson scattering phase shifts in lattice QCD are presented. A stochastic method of treating the low-lying modes of quark propagation that exploits Laplacian Heaviside quark-field…

Excited isovector mesons using the stochastic LapH method Open

Colin Morningstar, Brendan Fahy, You-Cyuan Jhang, Keisuke Jimmy Juge, David Lenkner , et al. · 2015

The spectrum of excited isovector mesons is studied using a 32^3 x 256 anisotropic lattice with u,d quark masses set to give a pion mass near 240 MeV. Results in the bosonic isovector nonstrange symmetry channels of zero total momentum are…

Pion-pion scattering phase shifts with the stochastic LapH method Open

Brendan Fahy, John Bulava, Ben Hörz, Keisuke Jimmy Juge, Colin Morningstar , et al. · 2015

Progress in calculating scattering phase shifts on $N_f=2+1$ anisotropic clover Wilson lattices is described. The stochastic LapH method facilitates computations in large volumes and for light pion masses. Results for pion masses down to 2…

Brendan Fahy YOU? Author Swipe