Physical Results from 2+1 Flavor Domain Wall QCD and SU(2) Chiral Perturbation Theory (2008)
Allton, C., Antonio, D. J., Aoki, Y., Blum, T., Boyle, P. A., Christ, N. H., ...
We have simulated QCD using 2+1 flavors of domain wall quarks on a $(2.74 {\rm fm})^3$ volume with an inverse lattice scale of $a^{-1} = 1.729(28)$ GeV. The up and down (light) quarks are degenerate...
Physical results from 2+1 flavor domain wall QCD and SU(2) Chiral Perturbation Theory (2008)
Alton, C., Antonio, D.J., Aoki, Y., Blum, T., Boyle, P.A., Christ, N.H., ...
We have simulated QCD using 2+1 flavors of domain wall quarks on a (2.74 {\rm fm})^3 volume with an inverse lattice scale of a^{-1} = 1.729(28) GeV. The up and down (light) quarks are degenerate in...
Nucleon axial charge in 2+1 flavor dynamical lattice QCD with domain wall fermions (2008)
Yamazaki, T., Aoki, Y., Blum, T., Lin, H. W., Lin, M. F., Ohta, S., ...
We present results for the nucleon axial charge g_A at a fixed lattice spacing of 1/a=1.73(3) GeV using 2+1 flavors of domain wall fermions on size 16^3x32 and 24^3x64lattices (L=1.8 and 2.7 fm) with...
Neutral kaon mixing from 2+1 flavor Domain Wall QCD (2007)
Antonio, D. J., Boyle, P. A., Blum, T., Christ, N. H., Cohen, S. D., Dawson, C., ...
We present the first results for neutral kaon mixing using 2+1 flavors of domain wall fermions. A new approach is used to extrapolate to the physical up and down quark masses from our numerical...
2+1 flavor domain wall QCD on a (2 fm)^3 lattice: light meson spectroscopy with Ls = 16 (2007)
Allton, C., Antonio, D. J., Blum, T., Bowler, K. C., Boyle, P. A., Christ, N. H., ...
We present results for light meson masses and pseudoscalar decay constants from the first of a series of lattice calculations with 2+1 dynamical flavors of domain wall fermions and the Iwasaki gauge...
Antonio, D. J., Blum, T., Bowler, K. C., Boyle, P. A., Christ, N. H., Cohen, S. D., ...
We present results for the static interquark potential, light meson and baryon masses, and light pseudoscalar meson decay constants obtained from simulations of domain wall QCD with one dynamical...
We present a lattice calculation of the hadronic vacuum polarization and the lowest-order hadronic contribution to the muon anomalous magnetic moment, a_\mu = (g-2)/2, using 2+1 flavors of improved...
Berruto, F., Blum, T., Orginos, K., Soni, A.
We present a study of the neutron electric dipole moment ($\vec d_N$) within the framework of lattice QCD with two flavors of dynamical lig ht quarks. The dipole moment is sensitive to the...
Electromagnetic properties of hadrons with two flavors of dynamical domain wall fermions (2005)
Yamada, N., Blum, T., Hayakawa, M., Izubuchi, T.
We present the determination of the light quark masses using electromagnetic splittings of pions and kaons. The meson masses are calculated on $SU(3)\times U(1)$ gauge configurations, where SU(3)...
The Kaon B-parameter from Quenched Domain-Wall QCD (2005)
Aoki, Y., Blum, T., Christ, N. H., Dawson, C., Izubuchi, T., Mawhinney, R. D., ...
We present numerical results for the kaon B-parameter, B_K, determined in the quenched approximation of lattice QCD. Our simulations are performed using domain-wall fermions and the renormalization...
Lattice QCD with two dynamical flavors of domain wall quarks (2004)
Aoki, Y., Blum, T., Christ, N., Dawson, C., Hashimoto, K., Izubuchi, T., ...
We present results from the first large-scale study of two flavor QCD using domain wall fermions (DWF), a chirally symmetric fermion formulation which has proven to be very effective in the quenched...
Neutron Electric Dipole Moment with Domain Wall Quarks (2004)
Berruto, F., Blum, T., Orginos, K., Soni, A.
We present preliminary results for nucleon dipole moments computed with domain wall fermions. Our main target is the electric dipole moment of the neutron arising from the theta term in the gauge...
I present quenched domain wall fermion and 2+1 flavor improved Kogut-Susskind fermion calculations of the hadronic vacuum polarization which are used to calculate the ${\cal O}(\alpha^2)$ hadronic...
Cutoff effects in meson spectral functions (2004)
We study the lattice spacing dependence of meson spectral functions calculated in quenched QCD with domain wall fermions as well as clover Wilson fermions in quenched and partially-quenched QCD. We...
I present a preliminary calculation of the hadronic vacuum polarization for 2+1 flavors of improved Kogut-Susskind quarks by utilizing a set of gauge configurations recently generated by the MILC...
We present a quenched lattice calculation of the lowest order (alpha^2) hadronic contribution to the anomalous magnetic moment of the muon which arises from the hadronic vacuum polarization. A...
Domain wall fermions with improved gauge actions (2002)
Aoki, Y., Blum, T., Christ, N., Cristian, C., Dawson, C., Izubuchi, T., ...
We study the chiral properties of quenched domain wall fermions with several gauge actions. We demonstrate that the residual chiral symmetry breaking, which is present for a finite number of lattice...
Im$A_0$, Im$A_2$, and $\epsilon^\prime$ from quenched lattice QCD (2001)
We present results for the imaginary parts of the I=0 and 2 $K\to\pi\pi$ decay amplitudes, Im$A_{0,2}$, and the ratio of CP violation parameters, $\epsilon^\prime/\epsilon$. Our calculation is done...
Kaon Matrix Elements and CP-violation from Quenched Lattice QCD: (I) the 3-flavor case (2001)
Blum, T., Chen, P., Christ, N., Cristian, C., Dawson, C., Fleming, G., ...
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 lattice spacing...
Chirality Correlation within Dirac Eigenvectors from Domain Wall Fermions (2001)
Blum, T., Christ, N., Cristian, C., Dawson, C., Liao, X., Liu, G., ...
In the dilute instanton gas model of the QCD vacuum, one expects a strong spatial correlation between chirality and the maxima of the Dirac eigenvectors with small eigenvalues. Following Horvath,...
Non-perturbative Renormalisation of Domain Wall Fermions: Quark Bilinears (2001)
Blum, T., Christ, N., Cristian, C., Dawson, C., Fleming, G., Liu, G., ...
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 independent (RI)...
$K\to\pi\pi$ Decays with Domain Wall Fermions: Lattice Matrix Elements (2000)
We present a lattice calculation of the $K\to\pi$ and $K\to 0$ matrix elements of the $\Delta S=1$ effective weak Hamiltonian which can be used to determine $\epsilon^\prime/\epsilon$ and the $\Delta...
Quenched Lattice QCD with Domain Wall Fermions and the Chiral Limit (2000)
Blum, T., Chen, P., Christ, N., Cristian, C., Dawson, C., Fleming, G., ...
Quenched QCD simulations on three volumes, $8^3 \times$, $12^3 \times$ and $16^3 \times 32$ and three couplings, $\beta=5.7$, 5.85 and 6.0 using domain wall fermions provide a consistent picture of...
Polarized structure functions from the lattice (2000)
We give a brief sketch of lattice structure function calculations and review previous results for the axial coupling $g_A$. We outline a new technique for treating fermions on the lattice that...
$K -> \pi \pi$ and $\epsilon^\prime/\epsilon$ using domain wall fermions (1999)
This paper has been withdrawn.
A first study of epsilon'/epsilon on the lattice using domain wall fermions (1999)
Blum, T., Chen, P., Christ, N., Dawson, C., Fleming, G., Mawhinney, R., ...
This paper has been withdrawn.
Montgomery Modular Exponentiation on Reconfigurable Hardware (1999)
It is widely recognized that security issues will play a crucial role in the majority of future computer and communication systems. Central tools for achieving system security are cryptographic...
Resonant Processes in a Frozen Gas (1998)
Frasier, J. S., Celli, V., Blum, T.
We present a theory of resonant processes in a frozen gas of atoms interacting via dipole-dipole potentials that vary as $r^{-3}$, where $r$ is the interatomic separation. We supply an exact result...
Domain wall fermions in vector gauge theories (1998)
I review domain wall fermions in vector gauge theories. Following a brief introduction, the status of lattice calculations using domain wall fermions is presented. I focus on results from QCD,...
SU(3) Flavor Breaking in Hadronic Matrix Elements for (1998)
Results in the quenched approximation for SU(3) breaking ratios of the heavylight decay constants and the DeltaF = 2 mixing matrix elements are reported. Using lattice simulations at 6=g 2 = 5:7,...
SU(3) Flavor Breaking in Hadronic Matrix Elements for $B - \bar B$ Oscillations (1998)
Bernard, C., Blum, T., Soni, A.
Results in the quenched approximation for SU(3) breaking ratios of the heavy-light decay constants and the $\Delta F=2$ mixing matrix elements are reported. Using lattice simulations at $6/g^2=5.7$,...
Update on lattice QCD with domain wall quarks (1997)
Using domain wall fermions, we estimate B_K(mu approx 2 GeV)=0.602(38) in quenched QCD which is consistent with previous calculations. We also find ratios of decay constants that are consistent with...
Update on the hadron spectrum with two flavors of staggered quarks (1997)
Blum, T., DeGrand, T. A., DeTar, C., Gottlieb, S., Heller, U. M., ...
We present an update on the MILC Collaboration's light hadron spectrum calculation with two flavors of dynamical, staggered quarks. We present extrapolations of the nucleon to rho mass ratio to the...
Lattice QCD with domain wall quarks and applications to weak matrix elements (1997)
Using domain wall fermions, we estimate $B_K(\mu\approx 2 GeV)=0.628(47)$ in quenched QCD which is consistent with previous calculations. At $\gbeta=6.0$ and 5.85 we find the ratio $f_K/m_\rho$ in...
Critical Behavior at the Chiral Phase Transition (1997)
Bernard, C., Blum, T., DeTar, C. E., Heller, U. M., Gottlieb, S., Hetrick, J. E., ...
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 phenomenology and for...
A study of nonlocal conductivity in high-temperature superconductors (1997)
Phillipson, S. J., Moore, M. A., Blum, T.
We examine nonlocal conductivity in high-temperature superconductors from a phenomenological point of view. One wants to deduce the properties of the conductivity, especially its inherent length...
B Mixing on the Lattice: $f_B$, $f_{B_s}$ and Related Quantities (1997)
Bernard, C., Blum, T., DeGrand, T., DeTar, C., Gottlieb, Steven, Heller, U. M., ...
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 still preliminary, but...
$B$ Mixing on the Lattice: $f_B$, $f_{B_s}$ and Related Quantities (1997)
C. Bernard, T. Blum, T. Degrand, C. Detar, Steven Gottlieb, U. M. Heller, ...
. The MILC collaboration computation of heavy-light decay constants is described. Results for f B , f Bs , fD , f Ds and their ratios are presented. These results are still preliminary, but the...
Domain wall quarks and kaon weak matrix elements (1997)
We present lattice calculations of kaon matrix elements with domain wall fermions. Using lattices with beta=5.85, 6.0, and 6.3, we estimate B_K(approx 2 GeV)=0.628(47) in quenched QCD which is...
Perturbative studies of the conductivity in the vortex-liquid regime (1997)
We calculate the Aslamazov-Larkin term of the conductivity in the presence of a magnetic field applied along the c-axis from the time-dependent Ginzburg-Landau equation perturbatively using two...
The equation of state for QCD from the lattice (1997)
Bernard, C W, Blum, T, DeTar, C E, McNeile, C, Gottlieb, S, Rummukainen, K, ...
The equation of state for two flavor QCD at N_t=6 (1996)
Blum, T., Detar, C., Gottlieb, S., Heller, U. M., Hetrick, J. E., ...
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 study using...
QCD with domain wall quarks (1996)
We present lattice calculations in QCD using a variant of Kaplan fermions which retain the continuum SU(N)xSU(N) chiral symmetry on the lattice in the limit of an infinite extra dimension. In...
SU(3) Flavor Breaking in Hadronic Matrix Elements for $B - \bar B$ Oscillations (1996)
Bernard, C., Blum, T., Soni, A.
We present an analysis, using quenched configurations at $6/g^2=$5.7, 5.85, 6.0, and 6.3 of the matrix element $\MP\equiv\langle \bar P_{hl}|\bar h \gamma_\mu (1-\gamma_5)l \bar h...
Simulating QCD at finite density with static quarks (1996)
Blum, T., Hetrick, J. E., Toussaint, D.
We study lattice QCD in the limit that the quark mass and chemical potential are simultaneously made large, resulting in a controllable density of quarks which do not move; this is similar in spirit...
Recent MILC spectrum results (1996)
Bernard, C., Blum, T., DeGrand, T. A., DeTar, C., Gottlieb, Steve, Heller, Urs M., ...
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 with improved...
Blum, T., DeGrand, T., DeTar, C., Gottlieb, Steven, Heller, U. M., ...
We describe the current status of the MILC collaboration computation of $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios. Progress over the past year includes: better statistics and plateaus at...
Assorted weak matrix elements involving the bottom quark (1996)
Bernard, C., Blum, T., DeGrand, T., DeTar, C. E., Gottlieb, Steven, Heller, U. M., ...
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 results for the static...
Thermodynamics for two flavor QCD (1996)
Bernard, C., Blum, T., DeTar, C. E., Gottlieb, Steven, Heller, U. M., Hetrick, J. E., ...
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 am_q=0.0125. The...
Nonlocal conductivity in the vortex-liquid regime (1995)
We investigate the nonlocal conductivity calculated from the time-dependent Ginzburg-Landau equation. When the fluctuations of the vector potential are negligible, the high-temperature (Gaussian) and...
Semiquantum Chaos in the Double-Well (1995)
The new phenomenon of semiquantum chaos is analyzed in a classically regular double-well oscillator model. Here it arises from a doubling of the number of effectively classical degrees of freedom,...
The N$_{t}$ = 6 equation of state for two flavor QCD (1995)
Bernard, C W, Blum, T, DeTar, C E, Gottlieb, S, Heller, U M, Hetrick, J E, ...
The $N_t=6$ equation of state for two flavor QCD (1995)
Bernard, C., Blum, T., DeTar, C., Gottlieb, Steven, Heller, U. M., Hetrick, J. E., ...
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 symmetry restoration...
Two-flavor staggered-fermion thermodynamics at $N_t = 12$ (1995)
Bernard, C., Blum, T., DeTar, C., Gottlieb, Steven, Heller, Urs M., Hetrick, J., ...
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 staggered fermion...
F$_{B}$ quenched and unquenched (1995)
Bernard, C W, Blum, T, De, A, DeGrand, T A, DeTar, C E, Gottlieb, S, ...
Results for f_B, f_{B_s}, f_D, f_{D_s}, and their ratios are presented. High statistics quenched runs at \beta=5.7, 5.85, 6.0, and 6.3, plus a run still in progress at \beta=6.52 make possible a...
$f_B$ quenched and unquenched (1995)
Bernard, C., Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Results for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$, and their ratios are presented. High statistics quenched runs at $\beta=5.7$, $5.85$, $6.0$, and $6.3$, plus a run still in progress at $\beta=6.52$...
Improved Perturbation Theory for the Kardar-Parisi-Zhang Equation (1995)
We apply a number of schemes which variationally improve perturbation theory for the Kardar-Parisi-Zhang equation in order to extract estimates for the dynamic exponent z. The results for the various...
Variational Schemes in the Fokker-Planck Equation (1995)
We investigate variational methods for finding approximate solutions to the Fokker-Planck equation, especially in cases lacking detailed balance. These schemes fall into two classes: those in which a...
Status and prospect for determining $f_B$, $f_{B_s}$, $f_{B_s} / f_B$ on the lattice (1995)
Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson...
Principles for Controlling the Electronic Quality of High-Rate Deposited a-Si:H Films (1995)
Suchaneck, G., Blum, T., Röhlecke, S., Kottwitz, A.
By altering the plasma generation frequency, applying a magnetic field, changing the plasma regime from the low voltage γ-regime where the dominant electron-energy gain mechanism is related to...
Principles for Controlling the Electronic Quality of High-Rate Deposited a-Si:H Films (1995)
Suchaneck, G., Blum, T., Röhlecke, S., Kottwitz, A.
By altering the plasma generation frequency, applying a magnetic field, changing the plasma regime from the low voltage γ-regime where the dominant electron-energy gain mechanism is related to...
Principles for Controlling the Electronic Quality of High-Rate Deposited a-Si:H Films (1995)
Suchaneck, G., Blum, T., Röhlecke, S., Kottwitz, A.
By altering the plasma generation frequency, applying a magnetic field, changing the plasma regime from the low voltage γ-regime where the dominant electron-energy gain mechanism is related to...
Failure of hydrodynamics within the vortex liquid phase (1994)
The recent discovery that some of the coefficients of the viscosity tensor are negative is shown to invalidate the hydrodynamic approach to the vortex liquid phase of a type-II superconductor. A...
Blum, T., DeTar, C., Heller, Urs M., Karkkainen, Leo, Rummukainen, K., Toussaint, D.
We study the thermal phase diagram of pure SU(3) lattice gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition line and determine...
Preliminary heavy-light decay constants from the MILC collaboration (1994)
Bernard, C., Blum, T., De, A., DeGrand, T., DeTar, C., Gottlieb, Steven, ...
Preliminary results from the MILC collaboration for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios are presented. We compute in the quenched approximation at $\beta=6.3$, 6.0 and 5.7 with Wilson...
SU(3) Lattice Gauge Theory With Adjoint Action At Nonzero Temperature (1994)
Blum, T., DeTar, Carleton, Heller, Urs M., Karkkainen, Leo, Toussaint, D.
We study the thermal phase diagram of pure SU(3) gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition line and determine the...
The beta function and equation of state for QCD with two flavors of quarks (1994)
Blum, T., Gottlieb, Steven, Karkkainen, Leo, Toussaint, D.
We measure the pressure and energy density of two flavor QCD in a wide range of quark masses and temperatures. The pressure is obtained from an integral over the average plaquette or psi-bar-psi. We...
Adding Gauge Fields to Kaplan's Fermions (1993)
We experiment with adding dynamical gauge field to Kaplan (defect) fermions. In the case of U(1) gauge theory we use an inhomogenous Higgs mechanism to restrict the 3d gauge dynamics to a planar 2d...
A variational study of directed polymers in disordered media with short-range interactions (1993)
A variational method that allows for replica-symmetry breaking is applied to directed polymers in an (N+1)-dimensional disordered medium. The noise studied here has gaussian correlations, i.e. it is...