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Numrering	Referens	Omslagsbild	Hitta
1.	Aaron, F. D., et al. (författare) Measurement of the inclusive ep scattering cross section at low Q (2) and x at HERA 2009 Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 63:4, s. 625-678 Tidskriftsartikel (refereegranskat)abstract A measurement of the inclusive ep scattering cross section is presented in the region of low momentum transfers, 0.2 GeV2 a parts per thousand currency signQ (2)a parts per thousand currency sign12 GeV2, and low Bjorken x, 5a <...10(-6)a parts per thousand currency signxa parts per thousand currency sign0.02. The result is based on two data sets collected in dedicated runs by the H1 Collaboration at HERA at beam energies of 27.6 GeV and 920 GeV for positrons and protons, respectively. A combination with data previously published by H1 leads to a cross section measurement of a few percent accuracy. A kinematic reconstruction method exploiting radiative ep events extends the measurement to lower Q (2) and larger x. The data are compared with theoretical models which apply to the transition region from photoproduction to deep inelastic scattering.
2.	Aktas, A, et al. (författare) Diffractive photoproduction of J/psi mesons with large momentum transfer at HERA 2003 Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 568:3-4, s. 205-218 Tidskriftsartikel (refereegranskat)abstract The diffractive photoproduction of J/psi mesons is measured with the HI detector at the ep collider HERA using an integrated luminosity of 78 pb(-1). The differential cross section dsigma(gammap --> J/psiY)/dt is studied in the range 2 < < 30 GeV2, where t is the square of the four-momentum transferred at the proton vertex. The cross section is also presented as a function of the photon-proton centre-of-mass energy W-gammap in three t intervals, spanning the range 50 < W-gammap < 200 GeV. A fast rise of the cross section with W-gammap is observed for each t range and the slope for the effective linear Pomeron trajectory is measured to be alpha' = -0.0135 +/- 0.0074(stat.) +/- 0.0051(syst.) GeV-2. The measurements are compared with perturbative QCD models based on BFKL and DGLAP evolution. The data are found to be compatible with s-channel helicity conservation. (C) 200 Published by Elsevier B.V.

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Typ av publikation: tidskriftsartikel (2)

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Författare/redaktör: Bracinik, J. (2); Bruncko, D. (2); Hoffmann, D. (2); Katzy, J. (2); Klein, M. (2); Laycock, P. (2); visa fler...; Lobodzinska, E. (2); Mehta, A. (2); Meier, K. (2); Meyer, J. (2); Rizvi, E. (2); Sauvan, E. (2); Schmitt, S. (2); Schoeffel, L. (2); South, D. (2); Zhang, Z. (2); Diaconu, C. (2); Ferencei, J. (2); Greenshaw, T. (2); Kluge, T. (2); Lendermann, V. (2); Zhokin, A. (2); Astvatsatourov, A. (2); Kostka, P. (2); Lebedev, A. (2); Nozicka, M. (2); Levonian, S. (2); Tomasz, F. (2); Andreev, V. (2); Backovic, S. (2); Barrelet, E. (2); Bartel, W. (2); Behnke, O. (2); Belousov, A. (2); Boudry, V. (2); Brisson, V. (2); Bunyatyan, A. (2); Buschhorn, G. (2); Bystritskaya, L. (2); Cassol-Brunner, F. (2); Chekelian, V. (2); Cozzika, G. (2); Cvach, J. (2); Daum, K. (2); Delcourt, B. (2); De Roeck, A. (2); Dodonov, V. (2); Dubak, A. (2); Eckerlin, G. (2); Efremenko, V. (2); visa färre...

Lärosäte: Lunds universitet (2)

Språk: Engelska (2)

Forskningsämne (UKÄ/SCB): Naturvetenskap (2)

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