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Title: pp{yields}pp{eta}{sup '} reaction at high energies

Abstract

We discuss double-diffractive (double-elastic) production of the {eta}{sup '}-meson in the pp{yields}p{eta}{sup '}p reaction within the formalism of unintegrated gluon distribution functions (UGDF). We estimate also the contribution of {gamma}*{gamma}*{yields}{eta}{sup '} fusion. The distributions in the Feynman x{sub F} (or rapidity), transferred four-momenta squared between initial and final protons (t{sub 1},t{sub 2}) and azimuthal angle difference between outgoing protons ({phi}) are calculated. The deviations from the sin{sup 2}({phi}) dependence predicted by one-step vector-vector-pseudoscalar coupling are quantified and discussed. The results are compared with the results of the WA102 collaboration at CERN. Most of the models of UGDF from the literature give a too small cross section as compared to the WA102 data and predict angular distribution in relative azimuthal angle strongly asymmetric with respect to {pi}/2 in disagreement with the WA102 data. This points to a different mechanism at the WA102 energy. Predictions for RHIC, Tevatron and LHC are given. We find that the normalization, t{sub 1,2} dependences as well as deviations from sin{sup 2}({phi}) of double-diffractive double-elastic cross section are extremely sensitive to the choice of UGDF. Possible implications for UGDFs are discussed.

Authors:
; ;  [1];  [2]
  1. Institute of Nuclear Physics PAN, PL-31-342 Cracow, Poland and University of Rzeszow, PL-35-959 Rzeszow (Poland)
  2. (Russian Federation) and Faculty of Physics, Moscow State University, Moscow 119992, (Russian Federation)
Publication Date:
OSTI Identifier:
21020068
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.054021; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR DISTRIBUTION; ASYMMETRY; BROOKHAVEN RHIC; CERN LHC; COMPARATIVE EVALUATIONS; COUPLING; CROSS SECTIONS; DIFFRACTION MODELS; DISTRIBUTION FUNCTIONS; ETA MESONS; ETA PRIME-958 MESONS; FERMILAB TEVATRON; GLUONS; PARTICLE KINEMATICS; PARTICLE RAPIDITY; PROTON-PROTON INTERACTIONS; PROTONS

Citation Formats

Szczurek, A., Pasechnik, R. S., Teryaev, O. V., and Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980. pp{yields}pp{eta}{sup '} reaction at high energies. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.054021.
Szczurek, A., Pasechnik, R. S., Teryaev, O. V., & Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980. pp{yields}pp{eta}{sup '} reaction at high energies. United States. doi:10.1103/PHYSREVD.75.054021.
Szczurek, A., Pasechnik, R. S., Teryaev, O. V., and Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980. Thu . "pp{yields}pp{eta}{sup '} reaction at high energies". United States. doi:10.1103/PHYSREVD.75.054021.
@article{osti_21020068,
title = {pp{yields}pp{eta}{sup '} reaction at high energies},
author = {Szczurek, A. and Pasechnik, R. S. and Teryaev, O. V. and Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980},
abstractNote = {We discuss double-diffractive (double-elastic) production of the {eta}{sup '}-meson in the pp{yields}p{eta}{sup '}p reaction within the formalism of unintegrated gluon distribution functions (UGDF). We estimate also the contribution of {gamma}*{gamma}*{yields}{eta}{sup '} fusion. The distributions in the Feynman x{sub F} (or rapidity), transferred four-momenta squared between initial and final protons (t{sub 1},t{sub 2}) and azimuthal angle difference between outgoing protons ({phi}) are calculated. The deviations from the sin{sup 2}({phi}) dependence predicted by one-step vector-vector-pseudoscalar coupling are quantified and discussed. The results are compared with the results of the WA102 collaboration at CERN. Most of the models of UGDF from the literature give a too small cross section as compared to the WA102 data and predict angular distribution in relative azimuthal angle strongly asymmetric with respect to {pi}/2 in disagreement with the WA102 data. This points to a different mechanism at the WA102 energy. Predictions for RHIC, Tevatron and LHC are given. We find that the normalization, t{sub 1,2} dependences as well as deviations from sin{sup 2}({phi}) of double-diffractive double-elastic cross section are extremely sensitive to the choice of UGDF. Possible implications for UGDFs are discussed.},
doi = {10.1103/PHYSREVD.75.054021},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}