The method to determine the CP nature of Higgs bosons from decays to tau leptons at LC

We demonstrate how the transverse tau tau spin correlations can be used to determine whether a decaying Higgs boson is a mixed CP eigenstate, thereby directly probe the presence of CP violation in the neutral Higgs boson sector. We investigate the subsequent decay chain H --> tau+ tau- --> rho+ nu rho- nu --> pi+ pi0 nu pi- pi0 nu. The prospects for the measurement of the pseudoscalar admixture in the H-tau-tau coupling to a Standard Model Higgs boson with a mass of 120 GeV are quantified for the case of e+e- collisions at 350 GeV center-of-mass energy and 1 ab^{-1} integrated luminosity. The Standard Model Higgsstrahlung production process is used as an example.Comment: 9 pages, 4 figure, Presented at the XXVII International Conference of Theoretical Physics, Matter To The Deepest, Ustron, Poland, 15-21 September 200

Home on the border in Ana Castillo's "The Guardians": the colonial matrix of power, epistemic disobedience, and decolonial love

After 9/11, more than ever in the history of the United States of America, security and domesticity have become paradoxical antonyms in racially and ethnically mixed areas, like that of the US-Mexican border. The borderland‘s history is further complicated by the issue of illegal immigration and its corollaries, such as strict border control and mass deportations of ―aliens,‖ as well as the rising crime rate. Even though it is protected by a fence and monitored by heavily armed border patrols, the area‘s notoriety for narcosmuggling, human trafficking and femicide keeps growing. Paradoxically, the more drastic the security measures used, the more dangerous the borderland becomes. In her 2007 novel The Guardians, Ana Castillo suggests that tighter control itself is responsible for criminalizing the border. Focusing on a Mexican American woman‘s search for her brother lost during an illegal crossing, the novel presents a complex dynamic between security and domesticity. The following article attempts to trace this dynamic through the epistemic lens of decolonial methodology.Después del 11-S, más que nunca antes en la historia de los Estados Unidos de América, la seguridad y la domesticidad se han convertido en antónimos paradójicos en zonas de abundante mezcla racial y étnica como la frontera entre México y EE. UU. La historia de la zona fronteriza se ve complicada, además, por la cuestión de la inmigración ilegal y sus distintos corolarios, como por ejemplo el estricto control aduanero existente, las deportaciones en masa de ―extranjeros‖ o el aumento de los índices de criminalidad. Incluso aunque se halle protegida por una valla y aunque esté monitorizada por patrullas fronterizas fuertemente armadas, la ya notoria reputación del área por el contrabando de drogas y personas, así como por el feminicidio, sigue empeorando. Paradójicamente, cuanto más drásticas son las medidas de seguridad empleadas, más peligrosa se vuelve la frontera. En su novela de 2007, Guardianes de la frontera, Ana Castillo sugiere que el recrudecimiento del control fronterizo es en sí responsable de la criminalización de la zona fronteriza. Centrándose en la historia de una mujer mexicano-estadounidense que busca a su hermano perdido durante un cruce ilegal de la frontera, la novela presenta una compleja dinámica entre seguridad y domesticidad. El presente artículo tiene como objeto explorar esta dinámica a través de la lente epistémica que ofrece la aplicación de una metodología decolonial

Monte Carlo Generators for the LHC

The status of two Monte Carlo generators, HELAC-PHEGAS, a program for multi-jet processes and VBFNLO, a parton level program for vector boson fusion processes at NLO QCD, is briefly presented. The aim of these tools is the simulation of events within the Standard Model at current and future high energy experiments, in particular the LHC. Some results related to the production of multi-jet final states at the LHC are also shown.Comment: 8 pages, 8 figures. Presented at the XXXI International Conference of Theoretical Physics, Matter To The Deepest: Recent Developments In Physics of Fundamental Interactions, Ustron, 5-11 September 2007, Polan

Invariance of regularity conditions under definable, locally Lipschitz, weakly bi-Lipschitz mappings

In this paper we describe the notion of a weak lipschitzianity of a mapping on a $C^{q}$ stratification. We also distinguish a class of regularity conditions that are in some sense invariant under definable, locally Lipschitz and weakly bi-Lipschitz homeomorphisms. This class includes the Whitney (B) condition and the Verdier condition