TY - JOUR
T1 - Cross section measurements of hard diffraction at the Spp̄S-collider
AU - Brandt, A.
AU - Erhan, S.
AU - Kuzucu, A.
AU - Medinnis, M.
AU - Ozdes, N.
AU - Schlein, P. E.
AU - Zeyrek, M. T.
AU - Zweizig, J. G.
AU - Cheze, J. B.
AU - Zsembery, J.
PY - 1998/3/5
Y1 - 1998/3/5
N2 - The UA8 experiment previously reported the observation of jets in diffractive events containing leading protons ("hard diffraction"), which was interpreted as evidence for the partonic structure of an exchanged Reggeon, believed to be the ℘omeron. In the present Letter, we report the final UA8 hard-diffractive (jet) cross section results and their interpretation. After corrections, the fraction of single diffractive events with mass from 118 to 189 GeV that have two scattered partons, each with EjetT > 8 GeV, is in the range 0.002 to 0.003 (depending on xp). We determine the product, fK, of the fraction by which the ℘omeron's momentum sum rule is violated and the normalization constant of the ℘omeron-Flux-Factor of the proton. For a pure gluonic- or a pure qq̄-℘omeron, respectively: fK = (0.30 ± 0.05 ± 0.09) and (0.56 ± 0.09 ± 0.17) GeV-2.
AB - The UA8 experiment previously reported the observation of jets in diffractive events containing leading protons ("hard diffraction"), which was interpreted as evidence for the partonic structure of an exchanged Reggeon, believed to be the ℘omeron. In the present Letter, we report the final UA8 hard-diffractive (jet) cross section results and their interpretation. After corrections, the fraction of single diffractive events with mass from 118 to 189 GeV that have two scattered partons, each with EjetT > 8 GeV, is in the range 0.002 to 0.003 (depending on xp). We determine the product, fK, of the fraction by which the ℘omeron's momentum sum rule is violated and the normalization constant of the ℘omeron-Flux-Factor of the proton. For a pure gluonic- or a pure qq̄-℘omeron, respectively: fK = (0.30 ± 0.05 ± 0.09) and (0.56 ± 0.09 ± 0.17) GeV-2.
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U2 - 10.1016/S0370-2693(97)01563-3
DO - 10.1016/S0370-2693(97)01563-3
M3 - Article
AN - SCOPUS:0347662449
SN - 0370-2693
VL - 421
SP - 395
EP - 404
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-4
ER -