Karin Wichmann

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Mean values and differential distributions of event-shape variables have been studied in neutral current deep inelastic scattering using an integrated luminos-ity of 82.2 pb −1 collected with the ZEUS detector at HERA. The kinematic range is 80 < Q 2 < 20 480 GeV 2 and 0.0024 < x < 0.6, where Q 2 is the virtuality of the exchanged boson and x is the Bjorken(More)
  • S Chekanov, M Derrick, S Magill, B Musgrave, D Nicholass, J Repond +313 others
  • 2008
Bose-Einstein correlations of charged and neutral kaons have been measured in e ± p deep inelastic scattering with an integrated luminosity of 121 pb −1 using the ZEUS detector at HERA. The two-particle correlation function was studied as a function of the four-momentum difference of the kaon pairs, Q 12 = −(p 1 − p 2) 2 , assuming a Gaussian shape for the(More)
We present a combination of semiempirical quantum-mechanical (SQM) calculations in the conductor-like screening model with the MM/GBSA (molecular-mechanics with generalized Born and surface-area solvation) method for ligand-binding affinity calculations. We test three SQM Hamiltonians, AM1, RM1, and PM6, as well as hydrogen-bond corrections and two(More)
The beauty production cross section for deep inelastic scattering events with at least one hard jet in the Breit frame together with a muon has been measured, for photon virtualities Q 2 > 2 GeV 2 , with the ZEUS detector at HERA using integrated luminosity of 72 pb −1. The total visible cross section is σ bb (ep → e jet µ X) = 40.9 ± 5.7 (stat.) +6.0 −4.4(More)
Differential inclusive jet cross sections in neutral current deep inelastic ep scattering have been measured with the ZEUS detector using an integrated luminosity of 38.7 pb −1. The jets have been identified using the k T cluster algorithm in the longitudinally invariant inclusive mode in the laboratory frame; they have been selected with jet transverse(More)
The COSMO surface polarization charge density σ resulting from quantum chemical calculations combined with a virtual conductor embedding has been widely proven to be a very suitable descriptor for the quantification of interactions of molecules in liquids. In a preceding paper, grid-based local histograms of σ have been introduced in the COSMOsim3D method,(More)
Exclusive electroproduction of φ mesons has been studied in e ± p collisions at √ s = 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 65.1 pb −1. The γ * p cross section is presented in the kinematic range 2 < Q 2 < 70 GeV 2 , 35 < W < 145 GeV and |t| < 0.6 GeV 2. The cross sections as functions of Q 2 , W , t and helicity angle θ h(More)
[5] Tatsuya Akutsu. A polynomial time algorithm for finding a largest common sub-graph of almost trees of bounded degree. [6] Tatsuya Akutsu. Protein structure alignment using dynamic programming and iterative improvement. Fujiyama. Point matching under non-uniform distortions and protein side chain packing based on an efficient maximum clique algorithm.(More)
The photoproduction of prompt photons, together with an accompanying jet, has been studied in ep collisions at a centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 77 pb −1. Cross sections were measured for the transverse energy of the photon and the jet larger than 5 and 6 GeV, respectively. The differential(More)
The distribution of the azimuthal angle of charged and neutral hadrons relative to the lepton plane has been studied for neutral current deep inelastic ep scattering using an integrated luminosity of 45 pb −1 taken with the ZEUS detector at HERA. The measurements were made in the hadronic centre-of-mass system. The analysis exploits the energy-flow method,(More)