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ETDEWEB   /       /    Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector

Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector

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Abstract

Inclusive J/{psi} production in photon-photon collisions has been observed by the DELPHI collaboration at LEP II beam energies. A clean signal from the reaction {gamma}{gamma} {yields} J/{psi} + X is seen. Number of observed events, N(J/{psi} {yields} {mu}+{mu}-) = 36 {+-} 7 for the integrated luminosity 617 pb-1, yielding a cross section of {sigma}(J/{psi} {yields} {mu}+{mu}-) = 25.2 {+-} 10.2 pb. Based on a study of the event shapes of different types of {gamma}{gamma} processes in the PYTHIA program, we conclude that (74{+-}22)% of the observed J/{psi} events are due to the 'resolved' photons, the dominant contribution of which is evidently a single color-octet gluon within the photon.
Authors:
Chapkine, Mikhail [1] 
  1. Institute for High Energy Physics, 142280 Protvino (Russian Federation)
Publication Date:
Jun 07, 2002
DOI:
https://doi.org/10.1063/1.1482542
Product Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 619; Journal Issue: 1; Conference: HADRON 2001: 9. international conference on hadron spectroscopy, Protvino (Russian Federation), 25 Aug - 1 Sep 2001; Other Information: DOI: 10.1063/1.1482542; (c) 2002 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); PBD: 7 Jun 2002
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COLOR MODEL; CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; GLUONS; INCLUSIVE INTERACTIONS; J PSI-3097 MESONS; LEP STORAGE RINGS; MULTIPARTICLE SPECTROMETERS; MUONS MINUS; MUONS PLUS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; PHOTON-PHOTON INTERACTIONS; PHOTONS
OSTI ID:
20620924
Country of Origin:
United States
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0094-243X; APCPCS; TRN: US03C4069064574
Submitting Site:
INIS
Size:
page(s) 803-806
Announcement Date:
Aug 28, 2005

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Citation Formats

Chapkine, Mikhail. Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector. United States: N. p., 2002. Web. doi:10.1063/1.1482542.
Chapkine, Mikhail. Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector. United States. https://doi.org/10.1063/1.1482542
Chapkine, Mikhail. 2002. "Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector." United States. https://doi.org/10.1063/1.1482542.
@misc{etde_20620924,
title = {Inclusive J/{psi} production in two-photon collisions at LEP II with the DELPHI detector}
 author = {Chapkine, Mikhail}
 abstractNote = {Inclusive J/{psi} production in photon-photon collisions has been observed by the DELPHI collaboration at LEP II beam energies. A clean signal from the reaction {gamma}{gamma} {yields} J/{psi} + X is seen. Number of observed events, N(J/{psi} {yields} {mu}+{mu}-) = 36 {+-} 7 for the integrated luminosity 617 pb-1, yielding a cross section of {sigma}(J/{psi} {yields} {mu}+{mu}-) = 25.2 {+-} 10.2 pb. Based on a study of the event shapes of different types of {gamma}{gamma} processes in the PYTHIA program, we conclude that (74{+-}22)% of the observed J/{psi} events are due to the 'resolved' photons, the dominant contribution of which is evidently a single color-octet gluon within the photon.}
 doi = {10.1063/1.1482542}
 journal = []
 issue = {1}
 volume = {619}
 journal type = {AC}
 place = {United States}
 year = {2002}
 month = {Jun}
 }