74,976 research outputs found
Experimental systematic uncertainties (and object reconstruction) on top physics, their correlations, comparison ATLAS vs CMS (vs Tevatron) and common agreements
The experimental systematic uncertainties associated to the reconstruction
and calibration of the objects appearing in top quark final states at the LHC
and Tevatron are discussed. The strategies followed in the ATLAS and CMS
experiments are compared in detail for the cases of the jet energy scale and
-tagging calibrations, where a categorisation of the associated uncertainty
sources as well as the corresponding correlations across experiments has been
proposed. The estimate of the non-prompt and fake lepton background to the top
quark leptonic channels is also discussed.Comment: Proceedings of Top2014 International Workshop on Top-Quark Physic
Monte Carlo Study of the Spin-1 Baxter-Wu Model
The two-dimensional spin-1 Baxter-Wu model is studied by using Monte Carlo
simulations. The standard single-spin-flip Metropolis algorithm is used to
generate the configurations from which the order parameter, specific heat and
magnetic susceptibility are measured. The finite-size scaling procedure is
employed in order to get the critical behavior. The extensive simulations shown
that the critical exponents are different from those of the spin-1/2 model
suggesting that the spin-1 model is in a different universality class.Comment: 3 pages, 3 figures, 1 tabl
Twisted Jacobi manifolds, twisted Dirac-Jacobi structures and quasi-Jacobi bialgebroids
We study twisted Jacobi manifolds, a concept that we had introduced in a
previous Note. Twisted Jacobi manifolds can be characterized using twisted
Dirac-Jacobi, which are sub-bundles of Courant-Jacobi algebroids. We show that
each twisted Jacobi manifold has an associated Lie algebroid with a 1-cocycle.
We introduce the notion of quasi-Jacobi bialgebroid and we prove that each
twisted Jacobi manifold has a quasi-Jacobi bialgebroid canonically associated.
Moreover, the double of a quasi-Jacobi bialgebroid is a Courant-Jacobi
algebroid. Several examples of twisted Jacobi manifolds and twisted
Dirac-Jacobi structures are presented
Mass, angular-momentum, and charge inequalities for axisymmetric initial data
We present the key elements of the proof of an upper bound for
angular-momentum and charge in terms of the mass for electro-vacuum
asymptotically flat axisymmetric initial data sets with simply connected orbit
space
Zero-temperature TAP equations for the Ghatak-Sherrington model
The zero-temperature TAP equations for the spin-1 Ghatak-Sherrington model
are investigated. The spin-glass energy density (ground state) is determined as
a function of the anisotropy crystal field for a large number of spins.
This allows us to locate a first-order transition between the spin-glass and
paramagnetic phases within a good accuracy. The total number of solutions is
also determined as a function of .Comment: 11 pages, 2 ps figures include
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