1,291 research outputs found

    Gamow-Teller properties of the double beta-decay partners 116Cd(Sn) and 150Nd(Sm)

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    The two Gamow-Teller (GT) branches connecting the double-beta decay partners (116Cd, 116Sn) and (150Nd, 150Sm) with the intermediate nuclei 116In and 150Pm are studied within a microscopic approach based on a deformed proton-neutron quasiparticle random-phase approximation built on a Skyrme selfconsistent mean field with pairing correlations and spin-isospin residual forces. The results are compared with the experimental GT strength distributions extracted from charge-exchange reactions. Combining the two branches, the nuclear matrix elements for the two-neutrino double-beta decay are evaluated and compared to experimental values derived from the measured half-lives.Comment: 10 pages, 16 figure

    Property (T) and rigidity for actions on Banach spaces

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    We study property (T) and the fixed point property for actions on LpL^p and other Banach spaces. We show that property (T) holds when L2L^2 is replaced by LpL^p (and even a subspace/quotient of LpL^p), and that in fact it is independent of 1‚ȧp<‚ąě1\leq p<\infty. We show that the fixed point property for LpL^p follows from property (T) when 1. For simple Lie groups and their lattices, we prove that the fixed point property for LpL^p holds for any 1<p<‚ąě1< p<\infty if and only if the rank is at least two. Finally, we obtain a superrigidity result for actions of irreducible lattices in products of general groups on superreflexive Banach spaces.Comment: Many minor improvement

    Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC

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    The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009 and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3% for the final calorimeter jet energy scale.Comment: 24 pages plus author list (36 pages total), 23 figures, 1 table, submitted to European Physical Journal

    Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC