Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Peisa, J."'
Publikováno v:
Nucl.Phys. B546 (1999) 351-365
We use lattice Monte Carlo simulations to study non-perturbatively the tension, i.e. the free energy per unit length, of an infinitely long vortex in the three-dimensional U(1)+Higgs theory. This theory is the low-energy effective theory of high-temp
Externí odkaz:
http://arxiv.org/abs/hep-ph/9809334
Publikováno v:
Nucl.Phys.Proc.Suppl. 73 (1999) 703-705
We describe how the strings, which are classical solutions of the continuum three-dimensional U(1)+Higgs theory, can be studied on the lattice. The effect of an external magnetic field is also discussed and the first results on the string free energy
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809047
Publikováno v:
Nucl.Phys. B544 (1999) 357-373
We study the finite temperature electroweak phase transition in an external hypercharge U(1) magnetic field H_Y, using lattice Monte Carlo simulations. For sufficiently small fields, H_Y/T^2 < 0.3, the magnetic field makes the first order transition
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809004
Autor:
UKQCD Collaboration, Allton, C. R., Booth, S. P., Bowler, K. C., Foster, M., Garden, J., Irving, A. C., Kenway, R. D., Michael, C., Peisa, J., Pickles, S. M., Sexton, J. C., Sroczynski, Z., Talevi, M., Wittig, H.
Publikováno v:
Phys.Rev.D60:034507,1999
We present the first results for the static quark potential and the light hadron spectrum using dynamical fermions at $\beta=5.2$ using an O(a) improved Wilson fermion action together with the standard Wilson plaquette action for the gauge part. Sea
Externí odkaz:
http://arxiv.org/abs/hep-lat/9808016
Scalar electrodynamics can be used to investigate the formation of cosmic strings in the early universe. We present the results of lattice Monte Carlo simulations of an effective three-dimensional U(1)+Higgs theory that describes the equilibrium prop
Externí odkaz:
http://arxiv.org/abs/hep-lat/9807042
Autor:
de Divitiis, G. M., Del Debbio, L., Di Pierro, M., Flynn, J. M., Michael, C., Peisa, J., Collaboration, UKQCD
Publikováno v:
JHEP9810:010,1998
The coupling $g_{B^\ast B \pi}$ is related to the form factor at zero momentum of the axial current between $B^\ast$- and $B$-states. This form factor is evaluated on the lattice using static heavy quarks and light quark propagators determined by a s
Externí odkaz:
http://arxiv.org/abs/hep-lat/9807032
Publikováno v:
Phys.Lett. B428 (1998) 334-341
We study non-perturbatively and from first principles the thermodynamics of vortices in 3d U(1) gauge+Higgs theory, or the Ginzburg-Landau model, which has frequently been used as a model for cosmological topological defect formation. We discretize t
Externí odkaz:
http://arxiv.org/abs/hep-ph/9803367
Maximal variance reduction for stochastic propagators with applications to the static quark spectrum
Publikováno v:
Phys.Rev.D58:034506,1998
We study a new method -- maximal variance reduction -- for reducing the variance of stochastic estimators for quark propagators. We find that while this method is comparable to usual iterative inversion for light-light mesons, a considerable improvem
Externí odkaz:
http://arxiv.org/abs/hep-lat/9802015
Publikováno v:
Nucl.Phys. B520 (1998) 345-381
We study the three-dimensional U(1)+Higgs theory (Ginzburg-Landau model) as an effective theory for finite temperature phase transitions from the 1 K scale of superconductivity to the relativistic scales of scalar electrodynamics. The relations betwe
Externí odkaz:
http://arxiv.org/abs/hep-lat/9711048
Autor:
Peisa, J., Michael, C.
Publikováno v:
Nucl.Phys.Proc.Suppl.63:338-340,1998
We measure the ground and excited states for B mesons in the static limit using maximally variance reduced estimators for light quark propagators. Because of the large number of propagators we are able to measure accurately also orbitally excited P,
Externí odkaz:
http://arxiv.org/abs/hep-lat/9709029