Production of {ital J}/{ital {psi}} Mesons from {ital {chi}}{sub {ital c}} Meson Decays in p{bar p} Collisions at {radical}({ital s})=1.8 TeV
Journal Article
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· Physical Review Letters
OSTI ID:628677
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- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna (Italy)
- Brandeis University, Waltham, Massachusetts 02264 (United States)
- University of California at Los Angeles, Los Angeles, California 90024 (United States)
- University of Chicago, Chicago, Illinois 60638 (United States)
- Duke University, Durham, North Carolina 28708 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- University of Florida, Gainesville, Florida 33611 (United States)
- Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati (Italy)
- University of Geneva, CH-1211 Geneva 4 (Switzerland)
We have measured the fraction of J/{psi} mesons originating from {chi}{sub c} meson decays in p{bar p} collisions at {radical}(s)=1.8 TeV . The fraction, for P{sup J/{psi}}{sub T}{gt}4.0 GeV /c and {vert_bar}{eta}{sup J/{psi}}{vert_bar}{lt}0.6 , not including contributions from b flavored hadrons, is 29.7{percent}{plus_minus}1.7{percent}(stat){plus_minus} 5.7{percent}(syst) . We have determined the cross sections for J/{psi} mesons originating from {chi}{sub c} decays and for directly produced J/{psi} mesons. We have found that direct J/{psi} production is in excess of the prediction of the color singlet model by the same factor found for direct {psi}(2S) production. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 628677
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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