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(IFIC) Artículos pre-print
Mostrando recursos 1 - 13 de 13
Precision Tests of the Standard Model - Pich, Antonio
Precision measurements of electroweak observables provide stringent tests of the Standard Model structure and an accurate determination of its parameters. An overview of the present experimental status is presented.
Effective Field Theory - Pich, Antonio
These lectures provide an introduction to the basic ideas and methods of Effective Field Theory, and a description of a few interesting phenomenological applications in particle physics. The main conceptual foundations are discussed in sections 2 and 3, which cover the momentum expansion and the most important issues associated with the renormalization process. Section 4 presents an overview of Chiral Perturbation Theory, the low-energy realization of Quantum Chromodynamics in the light quark sector. The Chiral Perturbation Theory framework is applied to weak transitions in section 5, where the physics of non-leptonic kaon decays is analyzed. The so-called Heavy Quark Effective...
Identification of photon-tagged jets in the ALICE experiment - Conesa, Gustavo; Delagrange, H.; Díaz Medina, José; Kharlov, Y. V.; Schutz, Y.
30 pp.-- PACS numbers: 25.75.Nq, 24.10.Lx, 25.75.-q, 29.40.Vj.-- Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Volume 585, Issues 1-2, 21 January 2008, Pages 28-39.-- Final full-text version of the paper available at: http://dx.doi.org/10.1016/j.nima.2007.10.050.
Prospects for Scalar Leptoquark Discovery at the LHC - Mitsou, Vasiliki A.; Benekos, N. Ch.; Panagoulias, I.; Papadopoulou, Th. D.
Submitted on 15 Nov 2004 (v1), last revised 2 Nov 2005 (this version, v2, with corrected typos and added content).-- 8 pages, 2 figures.-- PACS numbers: 12.60.-i, 13.85.Rm, 14.80.-j.-- Prepared for Conference on Physics at LHC, Vienna, Austria, 13-17 Jul 2004.-- Published in: Czechoslovak Journal of Physics 55: B659-B666 (2005).
Search for new physics with ATLAS at the LHC - Mitsou, Vasiliki A.
6 pages LaTeX, 4 EPS figures and 1 style file incorporated.-- Presented at the Lake Louise Winter Institute 2000: From Particles to the Universe, Alberta, Canada, 20-26 February 2000.
Production Performance of the ATLAS Semiconductor Tracker Readout System - Mitsou, Vasiliki A.; ATLAS SCT Collaboration
6 pages, 9 figures.-- Prepared for 14th IEEE-NPSS Real Time Conference 2005 (RT2005), 4-10 Jun 2005, Stockholm, Sweden.-- Published in: IEEE Transactions on Nuclear Science 53: 729-734 (2006), final full-text version of the paper available at: http://dx.doi.org/10.1109/TNS.2006.874727.
Readout Electronics Tests and Integration of the ATLAS Semiconductor Tracker - Mitsou, Vasiliki A.; ATLAS SCT Collaboration
The SemiConductor Tracker (SCT) together with the Pixel detector and the Transition Radiation Tracker (TRT) form the central tracking system of the ATLAS experiment at the LHC. It consists of single-sided microstrip silicon sensors, which are read out via binary ASICs based on the DMILL technology, and the data are transmitted via radiation-hard optical fibres. After an overview of the SCT detector layout and readout system, the final-stage assembly of large-scale structures and the integration with the TRT is presented. The focus is on the electrical performance of the overall SCT detector system through the different integration stages, including the...
Meson and baryon resonances - Oset, Eulogi; Geng, Li Sheng; Gamermann, Daniel; Molina, Raquel; Nicmorus, D.; Yamagata-Sekihara, J.; Nagahiro, H.; Hirenzaki, S.; Jido, D.; Döring, Michael; Ramos, Àngels
In this talk I review recent advances on the structure of the meson and baryon resonances which can be dynamically generated from the interaction of mesons or mesons and baryons. Particular emphasis is put on results involving vector mesons, which bring new light into the nature of some of the observed higher mass mesons and baryons and make predictions for new states.
Determination of the ΔS=1 weak Hamiltonian of the SU(4) chiral limit through topological zero-mode wave functions - Hernández Gamazo, Pilar; Laine, M.; Pena, Carlos Roberto; Torró Pastor, Emma; Wennekers, J.; Wittig, H.
A new method to determine the low-energy couplings of the ΔS=1 weak Hamiltonian is presented. It relies on a matching of the topological poles in 1/m2 of three-point correlators of two pseudoscalar densities and a four-fermion operator, measured in lattice QCD, to the same observables computed in the ε-regime of chiral perturbation theory. We test this method in a theory with a light charm quark, i.e. with an SU(4) flavour symmetry. Quenched numerical measurements are performed in a 2 fm box, and chiral perturbation theory predictions are worked out up to next-to-leading order. The matching of the two sides allows...
From loops to trees by-passing Feynman's theorem - Catani, Stefano; Gleisberg, Tanju; Krauss, Frank; Rodrigo, Germán; Winter, Jan-Christopher
We derive a duality relation between one-loop integrals and phase-space
integrals emerging from them through single cuts. The duality relation
is realized by a modification of the customary +i0 prescription of the
Feynman propagators. The new prescription regularizing the propagators,
which we write in a Lorentz covariant form, compensates for the absence
of multiple-cut contributions that appear in the Feynman Tree Theorem.
The duality relation can be applied to generic one-loop quantities in
any relativistic, local and unitary field theories.
It is suitable for applications to the analytical calculation of
one-loop scattering amplitudes, and to the numerical evaluation of
cross-sections at next-to-leading order.