M. Wingate

Two-flavor staggered-fermion thermodynamics at $N_{t} = 12$

C. Bernard, T. Blum, C. DeTar +7

We present new results in an ongoing study of the nature of the high temperature crossover in QCD with two light fermion flavors. These results are obtained with the conventional s…

hep-lat2002

The determination of alpha_s from lattice QCD with 2+1 flavors of dynamical quarks

C. Davies, A. Gray, M. Alford +8

We describe the first lattice determination of the strong coupling constant with 3 flavors of dynamical quarks. The method follows previous analyses in using a perturbative expansi…

Assorted weak matrix elements involving the bottom quark

C. Bernard, T. Blum, T. DeGrand +9

As part of a larger project to estimate the fB decay constant, we are recalculating fB_static using a variational smearing method in an effort to improve accuracy. Preliminary resu…

hep-lat2006

Unquenched determination of the kaon parameter B_K from improved staggered fermions

E. Gamiz, S. Collins, C. T. H. Davies +3

The use of improved staggered actions (HYP, Asqtad) has been proved to reduce the scaling corrections that affected previous calculations of B_K with unimproved (standard) staggere…

hep-lat1994

P-wave meson properties with Wilson quarks

M. Wingate, T. DeGrand, S. Collins +1

We describe two calculations involving P-wave mesons made of Wilson quarks: the strong coupling constant $I^\pm_{s}$ in the presence of two flavors of light dynamical fermions and the m…

The continuum limit in the quenched approximation

C. Bernard T. Blum, C. DeTar, Steven Gottlieb +6

Previous work at $6/ g^{2} = 5.7$ with quenched staggered quarks is extended with new calculations at 5.85 and 6.15 on lattices up to $3 2^{3} \times 64$ . These calculations allow a more de…

hep-lat2002

Kaon Matrix Elements and CP-violation from Quenched Lattice QCD: (I) the 3-flavor case

T. Blum, P. Chen, N. Christ +12

We report the results of a calculation of the K --> pi pi matrix elements relevant for the $\DIhalf$ rule and $\epe$ in quenched lattice QCD using domain wall fermions at a fixed l…

The equation of state for two flavor QCD at N_t=6

The MILC Collaboration, C. W. Bernard, T. Blum +9

We calculate the two flavor equation of state for QCD on lattices with lattice spacing a=(6T)^{-1} and find that cutoff effects are substantially reduced compared to an earlier stu…

B Leptonic Decays and B- bar B Mixing with 2+1 Flavors of Dynamical Quarks

A. Gray, C. Davies, E. Gulez +3

Calculations of B leptonic decays and B- bar B mixing using NRQCD heavy and Asqtad light valence quarks on the MILC dynamical configurations are described. Smearing has been implem…

hep-lat2019

Neutral B-meson mixing from full lattice QCD at the physical point

R. J. Dowdall, C. T. H. Davies, R. R. Horgan +4

We calculate the bag parameters for neutral $B$ -meson mixing in and beyond the Standard Model, in full four-flavour lattice QCD for the first time. We work on gluon field configura…

The $N_{t} = 6$ equation of state for two flavor QCD

C. Bernard, T. Blum, C. DeTar +8

We improve the calculation of the equation of state for two flavor QCD by simulating on $N_{t} = 6$ lattices at appropriate values of the couplings for the deconfinement/chiral symmetr…

hep-lat2000

Quenched Lattice QCD with Domain Wall Fermions and the Chiral Limit

T. Blum, P. Chen, N. Christ +16

Quenched QCD simulations on three volumes, $8^{3} \times$ , $1 2^{3} \times$ and $1 6^{3} \times 32$ and three couplings, $I^^{2} = 5.7$ , 5.85 and 6.0 using domain wall fermions provide a consist…

quant-ph2019

Simulating Lattice Gauge Theories within Quantum Technologies

M. C. BaÃ±uls, R. Blatt, J. Catani +17

Lattice gauge theories, which originated from particle physics in the context of Quantum Chromodynamics (QCD), provide an important intellectual stimulus to further develop quantum…

B_K from improved staggered quarks

E. Gamiz, S. Collins, C. T. H. Davies +2

We compare calculations of B_K with improved staggered quarks (HYP, Asqtad) and demonstrate the improved scaling behaviour that this gives rise to over previous calculations with u…

hep-lat2003

High-Precision Lattice QCD Confronts Experiment

C. T. H. Davies, E. Follana, A. Gray +23

We argue that high-precision lattice QCD is now possible, for the first time, because of a new improved staggered quark discretization. We compare a wide variety of nonperturbative…

hep-lat2015

Rare $B$ decays using lattice QCD form factors

R. R. Horgan, Z. Liu, S. Meinel +1

In this write-up we review and update our recent lattice QCD calculation of $B \to K^{*}$ , $B_{s} \to I ¨ $ , and $B_{s} \to K^{*}$ form factors [arXiv:1310.3722]. These unquenched calculatio…

$f_{B}$ quenched and unquenched

C. Bernard, T. Blum, A. De +12

Results for $f_{B}$ , $f_{B_{s}}$ , $f_{D}$ , $f_{D_{s}}$ , and their ratios are presented. High statistics quenched runs at $I^^{2} = 5.7$ , $5.85$ , $6.0$ , and $6.3$ , plus a run still in progress at…

hep-lat2001

Non-perturbative Renormalisation of Domain Wall Fermions: Quark Bilinears

T. Blum, N. Christ, C. Cristian +9

We find the renormalisation coefficients of the quark field and the flavour non-singlet fermion bilinear operators for the domain wall fermion action, in the regularisation indepen…

Thermodynamics for two flavor QCD

C. Bernard, T. Blum, C. E. DeTar +9

We conclude our analysis of the N_t=6 equation of state for two flavor QCD, first described at last year's conference. We have obtained new runs at am_q=0.025 and improved runs at…

cond-mat.other2006

General coordinate invariance and conformal invariance in nonrelativistic physics: Unitary Fermi gas

D. T. Son, M. Wingate

We show that the Lagrangian for interacting nonrelativistic particles can be coupled to an external gauge field and metric tensor in a way that exhibits a nonrelativistic version o…

From Spectroscopy to the Strong Coupling Constant with Heavy Wilson Quarks

M. Wingate, T. DeGrand, S. Collins +1

In this work we present lattice calculations of the masses of P-wave mesons using Monte Carlo simulations. Our valence fermions are defined by the Wilson action. Our gauge fields a…

hep-lat2003

Heavy-Light Meson Semileptonic Decays with Staggered Light Quarks

J. Shigemitsu, C. T. H. Davies, A. Gray +3

We report on exploratory studies of heavy-light meson semileptonic decays using Asqtad light quarks, NRQCD heavy quarks and Symanzik improved glue on coarse quenched lattices. Osci…

Recent MILC spectrum results

C. Bernard, T. Blum, T. A. DeGrand +9

We report on results from three spectrum calculations with staggered quarks: 1) a quenched calculation with the standard action for the gluons and quarks; 2) a quenched calculation…

hep-ph1997

B Mixing on the Lattice: $f_{B}$ , $f_{B_{s}}$ and Related Quantities

C. Bernard, T. Blum, T. DeGrand +9

The MILC collaboration computation of heavy-light decay constants is described. Results for $f_{B}$ , $f_{B_{s}}$ , $f_{D}$ , $f_{D_{s}}$ and their ratios are presented. These results are sti…

hep-lat2002

The Upsilon Spectrum from Lattice QCD with 2+1 Flavors of Dynamical Quarks

A. Gray, C. Davies, M. Alford +8

We describe the bottomonium spectrum obtained on the MILC configurations which incorporate 2+1 flavors of dynamical quarks. We compare to quenched and 2 flavor results also on MILC…

hep-lat2009

Moving NRQCD for heavy-to-light form factors on the lattice

R. R. Horgan, L. Khomskii, S. Meinel +9

We formulate Non-Relativistic Quantum Chromodynamics (NRQCD) on a lattice which is boosted relative to the usual discretization frame. Moving NRQCD (mNRQCD) allows us to treat the…

hep-lat1998

Heavy-Light Decay Constants: Conclusions from the Wilson Action

MILC Collaboration, C. Bernard, T. DeGrand +9

We report on the results of a MILC collaboration calculation of $f_{B}$ , $f_{B_{s}}$ , $f_{D}$ , $f_{D_{s}}$ and their ratios. We discuss the most important errors in more detail than we hav…

hep-lat2009

Recent results on B mixing and decay constants from HPQCD

J. Shigemitsu, C. T. H. Davies, E. Follana +5

We review recent results for B_d and B_s mixing parameters using MILC N_f=2+1 lattices, NRQCD b-quarks and AsqTad light quarks. Latest numbers for decay constants f_B and f_{B_s} a…

hep-lat2005

Dynamical determination of B_K from improved staggered quarks

E. Gamiz, S. Collins, C. T. H. Davies +2

The scaling corrections that affected previous staggered calculations of B_K have been proved to be reduced by using improved actions (HYP, Asqtad) in the quenched approximation. T…

hep-ph1998

Lattice Determination of Heavy-Light Decay Constants

MILC Collaboration, C. Bernard, T. DeGrand +9

We report on the MILC collaboration's calculation of $f_{B}$ , $f_{B_{s}}$ , $f_{D}$ , $f_{D_{s}}$ , and their ratios. Our central values come from the quenched approximation, but the quenchin…

hep-lat1997

Critical Behavior at the Chiral Phase Transition

C. Bernard, T. Blum, C. E. DeTar +8

Quantum chromodynamics with two zero mass flavors is expected to exhibit a phase transition with O(4) critical behavior. Fixing the universality class is important for phenomenolog…

Semileptonic B Decays with Nf=2+1 Dynamical Quarks

J. Shigemitsu, C. T. H. Davies, A. Dougall +6

Semileptonic, B --> pi l,nu, decays are studied on the MILC dynamical configurations using NRQCD heavy and Asqtad light quarks. We work with light valence quark masses ranging betw…

hep-lat2005

The Upsilon spectrum and m_b from full lattice QCD

A. Gray, I. Allison, C. T. H. Davies +4

We show results for the Upsilon spectrum calculated in lattice QCD including for the first time vacuum polarization effects for light u and d quarks as well as s quarks. We use glu…

First determination of the strange and light quark masses from full lattice QCD

HPQCD collaboration, MILC collaboration, UKQCD collaboration +18

We compute the strange quark mass $m_{s}$ and the average of the $u$ and $d$ quark masses $m^$ using full lattice QCD with three dynamical quarks combined with experimental value…