Cross section measurements of hard diffraction at the Spp̄S-collider

A. Brandt; S. Erhan; A. Kuzucu; M. Medinnis; N. Ozdes; P. E. Schlein; M. T. Zeyrek; J. G. Zweizig; J. B. Cheze; J. Zsembery

doi:10.1016/S0370-2693(97)01563-3

Cross section measurements of hard diffraction at the Spp̄S-collider

A. Brandt^*, S. Erhan, A. Kuzucu, M. Medinnis, N. Ozdes, P. E. Schlein, M. T. Zeyrek, J. G. Zweizig, J. B. Cheze, J. Zsembery

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 E^jet_T > 8 GeV, is in the range 0.002 to 0.003 (depending on x_p). 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.

Original language	English
Pages (from-to)	395-404
Number of pages	10
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	421
Issue number	1-4
DOIs	https://doi.org/10.1016/S0370-2693(97)01563-3
Publication status	Published - Mar 5 1998
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(97)01563-3

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title = "Cross section measurements of hard diffraction at the Sp{\=p}S-collider",

abstract = "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 q{\=q}-℘omeron, respectively: fK = (0.30 ± 0.05 ± 0.09) and (0.56 ± 0.09 ± 0.17) GeV-2.",

author = "A. Brandt and S. Erhan and A. Kuzucu and M. Medinnis and N. Ozdes and Schlein, {P. E.} and Zeyrek, {M. T.} and Zweizig, {J. G.} and Cheze, {J. B.} and J. Zsembery",

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doi = "10.1016/S0370-2693(97)01563-3",

language = "English",

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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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Cross section measurements of hard diffraction at the Spp̄S-collider

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