Measurement of the cross section for diffractive deep-inelastic scattering with a leading proton at HERA
H1 Collaboration (ukupan broj autora: 219)
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The cross section for the diffractive deep-inelastic scattering process ep - GT eXp is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data sample covers the range x(P) LT 0.1 in fractional proton longitudinal momentum loss, 0.1 LT vertical bar t vertical bar LT 0.7 GeV2 in squared four-momentum transfer at the proton vertex and 4 LT Q(2) LT 700 GeV2 in photon virtuality. The cross section is measured four-fold differentially in t, x(P), Q2 and beta = x/x(P), where x is the Bjorken scaling variable. The t and x(P) dependences are interpreted in terms of an effective pomeron trajectory and a sub-leading exchange. The data are compared with perturbative QCD predictions at next-to-leading order based on diffractive parton distribution functions previously extracted from complementary measurements of inclusive diffractive deep-inelastic scattering. The ratio of the diffractive to the inclusive ep cross section is studied as a function of Q(...2), beta and x(P).
Извор:European Physical Journal C. Particles and Fields, 2011, 71, 3
- Bundesministerium fur Bildung und Forschung, FRG [05H09GUF, 05H09VHC, 05H09VHF, 05H16PEA], UK Science and Technology Facilities Council, UK Particle Physics and Astronomy Research Council, FNRS-FWO-Vlaanderen, IISN-IIKW, Belgian Science Policy, Polish Ministry of Science and Higher Education [DPN/N168/DESY/2009], Deutsche Forschungsgemeinschaft, VEGA SR [2/7062/27], Swedish Natural Science Research Council, Ministry of Education of the Czech Republic [LC527, INGO-1P05LA259, MSM0021620859], Swiss National Science Foundation, CONACYT [48778-F], Russian Foundation for Basic Research (RFBR) [1329.2008.2], European Social Fund, National Resources (EPEAEK II)-PYTHAGORAS II, Romanian National Authority for Scientific Research [PN 09370101], Helmholtz Association (HGF) [VH-NG-401], IWT