Measurement of the muon inclusive cross section in pp collisions at s\sqrt{s} = 7 TeV with the ATLAS detector

The measurement of the muon inclusive differential cross section dsigma/dpT in pp collisions at sqrt(s)=7 TeV with the ATLAS detector is presented. The analysis is performed in the pseudorapidity interval |eta|< 2.5 for muon of transverse momentum 4 < pT < 100 GeV and with an integrated luminosity of 1.4 pb-1. The result is compared with the next-to-leading order with next-to-leading log high pT resummation prediction for the heavy avour production and with MC@NLO prediction for W-Z bosons production. The measurement is sensitive for the first time to the next-to-leading log contribution to the heavy flavour production in hadronic interactions.Comment: 3 pag, 2 figures, proceedings for the conference PIC2011, Vancouver, August28, Sept 1, 201

Thermodynamics in the NC disc

We study the thermodynamics of a scalar field on a noncommutative disc implementing the boundary as the limit case of an interaction with an appropriately chosen confining background. We explicitly obtain expressions for thermodynamic potentials of gases of particles obeying different statistics. In order to do that, we derive an asymptotic expansion for the density of the zeros of Laguerre polynomials. As a result we prove that the Bose-Einstein condensation in the noncommutative disc does not take place.Fil: Franchino Viñas, Sebastián Alberto. Universitat Jena; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Pisani, P.. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; Argentin

Resistive MSGC with double layered electrodes

The first successful attempts to optimize the electric field in Resistive Microstrip Gas Chamber (RMSGC) using additional field shaping strips located inside the detector substrate are described.Comment: Presented at 13th RD51 Collaboration meeting, CERN, Febr. 201

Semi-transparent Boundary Conditions in the Worldline Formalism

The interaction of a quantum field with a background containing a Dirac delta function with support on a surface of codimension 1 represents a particular kind of matching conditions on that surface for the field. In this article we show that the worldline formalism can be applied to this model. We obtain the asymptotic expansion of the heat-kernel corresponding to a scalar field on $\mathbb{R}^{d+1}$ in the presence of an arbitrary regular potential and subject to this kind of matching conditions on a flat surface. We also consider two such surfaces and compute their Casimir attraction due to the vacuum fluctuations of a massive scalar field weakly coupled to the corresponding Dirac deltas.Comment: 12 page

New crystals for Dual Readout calorimetry

Dual Readout Calorimetry is a promising new technique for highresolution calorimetry. It is based on simultaneous measurements, in the shower development process, of the scintillation and Cherenkov light (only produced by the electromagnetic shower component). In this way it is possible to measure, event by event, the contribution of the electromagnetic fraction, and to compensate for its fluctuations, that are the main source of degrading the hadronic energy resolution of calorimeters. In order to further improve both the electromagnetic and hadronic resolution, it is possible to reduce both the sampling fluctuations and the quantum fluctuations by using homogeneous, dense crystals. Promising results have been obtained by lead tungstate crystals (PbWO4), doped with small fractions of praseodymium or molybdenum. Results from the 2008 testbeam and perspective for the coming one this year will be shown

Boundaries in the Moyal plane

We study the oscillations of a scalar field on a noncommutative disc implementing the boundary as the limit case of an interaction with an appropriately chosen confining background. The space of quantum fluctuations of the field is finite dimensional and displays the rotational and parity symmetry of the disc. We perform a numerical evaluation of the (finite) Casimir energy and obtain similar results as for the fuzzy sphere and torus.Comment: 19 pages, 6 figures. Replaced by published versio