Search for the Photoexcitation of Exotic Mesons in the pi(+)pi(+)pi(-) System
Name
Nozar-2009-Search for the Photo.pdf
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318.81 KB
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Checksum (MD5)
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Author(s)
Skabelin, Alexander V.
Alternative Title
Search for the Photoexcitation of Exotic Mesons in the π+π+π- System
Date Issued
March 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Nozar, M. et al. “Search for the Photoexcitation of Exotic Mesons in the Π+π+π- System.” Physical Review Letters 102.10 (2009) : 102002 © 2009 The American Physical Society.
Version
Final published version
Abstract
A search for exotic mesons in the pi+pi+pi- system photoproduced by the charge exchange reaction γp→pi+pi+pi-(n) was carried out by the CLAS Collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A partial wave analysis was performed on a sample of 83 000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic JPC=1-+ resonant state in the 1 to 2 GeV mass range. Our partial wave analysis shows production of the a2(1320) and the pi2(1670) mesons, but no evidence for the a1(1260), nor the π1(1600) exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic π1(1600) cross section, less than 2% of the a2(1320) production.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.102.102002
