10,131 research outputs found
Higgs Searches and Prospects from LEP2
The status of the search at LEP2 for the Higgs in the Standard Model (SM) and
in the minimal supersymmetric extension of the Standard Model MSSM) is
reviewed. A preliminary lower limit of 95.5/c^2 at 95% C.L. on the SM Higgs is
obtained after a preliminary analysis of the data collected at sqrt(s)= 189
GeV. For standard choices of MSSM parameter sets, the search for the neutral
Higgs bosons h and A leads to preliminary 95% C.L. exclusion lower limits of
83.5GeV/c^2 and 84.5 GeV/c^2, respectively.Comment: 6 page
A study of center vortices in SU(2) and SU(3) gauge theories
We show how center vortices and Abelian monopoles both appear as local gauge
ambiguities in the Laplacian Center gauge. Numerical results, for SU(2) and
SU(3), support the view that the string tension obtained in the
center-projected theory matches the full string tension when the continuum
limit is taken.Comment: 9 pages, 4 figures; talk presented at the International Workshop on
Non-Perturbative Methods and Lattice QCD, Guangzhou, May 200
Laplacian Center Vortices
I present a unified picture of center vortices and Abelian monopoles. Both
appear as local gauge ambiguities in the Laplacian Center Gauge. This gauge is
constructed for a general SU(N) theory. Numerical evidence is presented, for
SU(2) and SU(3), that the projected theory confines with a string tension
similar to the non-Abelian one.Comment: 9 pages, 5 figures; talk presented at "Confinement 2000", Osaka,
March 200
Vector spectrum and color screening in two color QCD at nonzero T and \mu
We discuss a few aspects of the phase diagram of two color lattice QCD: we
investigate the long distance screening analyzing the behavior of the
interquark potential at large distances; we present a first set of results for
vector mesons and diquarks; we note similarities and differences between
features at high temperature and high baryon density.Comment: 9 pages, 4 figures; talk at the GISELDA Meeting held in Frascati,
Italy, 14-18 January 200
When is the deconfinement phase transition universal?
Pure Yang-Mills theory has a finite-temperature phase transition, separating
the confined and deconfined bulk phases. Svetitsky and Yaffe conjectured that
if this phase transition is of second order, it belongs to the universality
class of transitions for particular scalar field theories in one lower
dimension. We examine Yang-Mills theory with the symplectic gauge groups Sp(N).
We find new evidence supporting the Svetitsky-Yaffe conjecture and make our own
conjecture as to which gauge theories have a universal second order
deconfinement phase transition.Comment: 5 pages, 4 figures; Contribution to Confinement 2003, Tokyo, Japan,
July 21-24, 200
DInSAR deformation time series for monitoring urban areas: The impact of the second generation SAR systems
We investigate the capability improvement of the DInSAR techniques to map deformation phenomena affecting urban areas, by performing a comparative analysis of the deformation time series retrieved by applying the full resolution Small BAseline Subset (SBAS) DInSAR technique to selected sequences of SAR data acquired by the ENVISAT, RADARSAT-1 and COSMO-SkyMed (CSK) SAR data. The presented study, focused on the city of Napoli (Italy), allows us to quantify the dramatic increase of the DInSAR coherent pixel density achieved by exploiting the high resolution X-Band CSK SAR images with respect to the RADARSAT-1 and ENVISAT products, respectively; this permits us to analyze nearly all the structures located within the investigated urbanized area and, in many cases, also portions of a same building. © 2012 IEEE
- …