Eugenia Pérez

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The elastic electroproduction of ρ mesons is studied at HERA with the H1 detector for a photon virtuality in the range 1 < Q 2 < 60 GeV 2 and for a hadronic centre of mass energy in the range 30 < W < 140 GeV. The shape of the (ππ) mass distribution in the ρ resonance region is measured as a function of Q 2. The full set of ρ spin density matrix elements is(More)
Working Group: M. Bezouh, M.-A. Bizouard, C. Boehm, F. Borzumati, C. Briot, J. Carr, M. B. Causse, F. Charles, X. Chereau, P. Colas, L. Duflot, A. Dupperin, A. Ealet, H. El-Mamouni, N. Ghodbane, F. Gieres, B. Gonzalez-Pineiro, S. Gourmelen, G. Grenier, Ph. Gris, J.-F. Grivaz, C. Hebrard, B. Ille, J.-L. Kneur, N. Kostantinidis, J. Layssac, P. Lebrun, R.(More)
A precise measurement of the inclusive deep-inelastic e + p scattering cross section is reported in the kinematic range 1.5 ≤ Q 2 ≤ 150 GeV 2 and 3 · 10 −5 ≤ x ≤ 0.2. The data were recorded with the H1 detector at HERA in 1996 and 1997, and correspond to an integrated luminosity of 20 pb −1. The double differential cross section, from which the proton(More)
A search for associated production of charginos and neutralinos is performed using data recorded with the D0 detector at a pp center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider. This analysis considers final states with missing transverse energy and three charged leptons, of which at least two are electrons or muons. No evidence for(More)
A search for direct production of scalar bottom quarks (b) is performed with 310 pb(-1) of data collected by the D0 experiment in pp collisions at square root s = 1.96 TeV at the Fermilab Tevatron Collider. The topology analyzed consists of two b jets and an imbalance in transverse momentum due to undetected neutralinos (chi(1)0), with chi(1)0 assumed to be(More)
The cross section for ep → e bb̄X in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel bb̄ → eeX ′ is selected by identifying the semielectronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q2 ≤ 1GeV, the inelasticity 0.05 ≤ y ≤ 0.65 and(More)
A search for the production of neutral Higgs bosons Phi decaying into tau(+)tau(-) final states in pp[over ] collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb(-1), were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the(More)
We have performed a search for neutral Higgs bosons produced in association with bottom quarks in pp collisions, using 260 pb-1 of data collected with the D0 detector in Run II of the Fermilab Tevatron Collider. The cross sections for these processes are enhanced in many extensions of the standard model (SM), such as in its minimal supersymmetric extension(More)