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The inclusive single and double differential cross-sections for neutral and charged current processes with four-momentum transfer squared Q2 between 150 and 30 000 GeV2 and with Bjorken x between 0:0032 and 0:65 are measured in e+p collisions. The data were taken with the H1 detector at HERA between 1994 and 1997, and they correspond to an integrated(More)
I. Adam, R. Aleksan, L. Amerman, E. Antokhin, D. Aston, P. Bailly, C. Beigbeder, M. Benkebil, P. Besson, G. Bonneaud, Ph. Bourgeois, D. Breton, H. Briand, F. Brochard, D. N. Brown, A. Buzykaev, J. Chauveau, R. Cizeron, J. Cohen-Tanugi, M. Convery, S. Dardin, P. David, G. De Domenico, C. de la Vaissiere, A. de Lesquen, F. Dohou, M. Doser, S. Emery, S.(More)
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)
The electroproduction of J/ψ and ψ(2S) mesons is studied in elastic, quasi-elastic and inclusive reactions for four momentum transfers 2 < Q < 80 GeV and photon-proton centre of mass energies 25 < W < 180 GeV. The data were taken with the H1 detector at the electron proton collider HERA in the years 1995 to 1997. The total virtual photon-proton cross(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)
We have observed a narrow state near 2.32 GeV/c(2) in the inclusive D(+)(s)pi(0) invariant mass distribution from e(+)e(-) annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation.(More)
A search for events with an imbalance in transverse momentum and with isolated high energy leptons has been carried out at the positron-proton collider HERA. One event with an e and five events with a are found together with evidence for undetected particles carrying transverse momentum. Within the Standard Model the dominant origin of events with this kind(More)
Deep inelastic e p scattering data, taken with the H1 detector at HERA, are used to study the event shape variables thrust, jet broadening and jet mass in the current hemisphere of the Breit frame over a large range of momentum transfers Q between 7 GeV and 100 GeV. The data are compared with results from e + e − experiments. Using second order QCD(More)
A search for squarks in R-parity violating supersymmetry is performed in e + p collisions at HERA at a centre of mass energy of 300 GeV, using H1 data corresponding to an integrated luminosity of 37 pb −1. The direct production of single squarks of any generation in positron-quark fusion via a Yukawa coupling λ ′ is considered, taking into account R-parity(More)
A search of the exclusive radiative decays B-->rho(770)gamma and B0-->omega(782)gamma is performed on a sample of about 84x10(6) BBmacr; events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. No significant signal is seen in any of the channels. We set upper limits on the branching fractions B of(More)