<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Measurement of Differential ρ0 Photoproduction\r\nCross-Sections at HERA"^^ . "Exclusive photoproduction of ρ 0 vector mesons is studied with the H1 detector\r\nat HERA. A sample of over 900 000 π + π − photoproduction events was collected\r\nin the years 2006-2007 using the H1 Fast Track Trigger. It corresponds to an\r\nintegrated luminosity of 1.3 pb −1 . The dataset is used to study single-, double-,\r\nand triple-differential π + π − photoproduction cross-sections as a function of the\r\ninvariant mass of the pions m ππ , the photon-proton collision energy W γp , and the\r\nsquared momentum transfer at the proton vertex t. The phasespace is restricted\r\nto 0.5 GeV < m ππ < 2.2 GeV, 20 GeV < W γp < 80 GeV, −t < 1.5 GeV 2 , and a\r\nphoton virtuality Q 2 < 0.1 GeV 2 . Reactions in which the scattered proton stays\r\nintact are statistically separated from those where it dissociates to a low-mass\r\nhadronic system in the range m p < m Y < 10 GeV.\r\nThe m ππ distributions are parametrized by a Söding model to extract the ρ 0\r\ncontribution to π + π − production. Single- and double-differential ρ 0 cross-sections\r\nare measured as a function of W γp and t. The observed kinematic cross-section\r\ndependencies are parametrized using őts and are compared to expectations from\r\nphenomenological models as well as results from previous measurements. From the\r\ndouble-differential ρ 0 cross-section, the effective intercept and slope of the leading\r\nRegge trajectory in the measurement phasespace are extracted:\r\n\r\nα(t = 0) = 1.0659 ± 0.0033 (stat.) +0.0099/−0.0059 (syst.)\r\nα (t = 0) = 0.243 ± 0.050 (stat.) +0.030/−0.042 (syst.) GeV −2 ."^^ . "2019" . . . . . . . "Arthur Eugen"^^ . "Bolz"^^ . "Arthur Eugen Bolz"^^ . . . . . . "Measurement of Differential ρ0 Photoproduction\r\nCross-Sections at HERA (PDF)"^^ . . . "phdThesis-PDFA.pdf"^^ . . . "Measurement of Differential ρ0 Photoproduction\r\nCross-Sections at HERA (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #27450 \n\nMeasurement of Differential ρ0 Photoproduction \nCross-Sections at HERA\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .