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 < 60 GeV 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. The full set of ρ spin density matrix elements is(More)
A precise measurement of the inclusive deep-inelastic ep scattering cross section is reported in the kinematic range 1.5 ≤ Q ≤ 150GeV and 3 · 10 ≤ 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. The double differential cross section, from which the proton structure function(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 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)
The physics, and a design, of a Large Hadron Electron Collider (LHeC) are sketched. With high luminosity, 10cms, and high energy, √ s = 1.4TeV, such a collider can be built in which a 70GeV electron (positron) beam in the LHC tunnel is in collision with one of the LHC hadron beams and which operates simultaneously with the LHC. The LHeC makes possible(More)
A search for single top quark production is performed in the full e±p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb−1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark(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 production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon 2 < Q^2 < 100 GeV^2 and the inelasticity 0.1 < y < 0.6. The K_s and Lambda production cross sections and(More)
We report the observation of the X(3872) in the J/psipi(+)pi(-) channel, with J/psi decaying to mu(+)mu(-), in pp collisions at sqrt[s]=1.96 TeV. Using approximately 230 pb(-1) of data collected with the Run II D0 detector, we observe 522+/-100 X(3872) candidates. The mass difference between the X(3872) state and the J/psi is measured to be(More)