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Title: Tetraquark Interpretation of the BELLE Data on the Anomalous {Upsilon}(1S){pi}{sup +{pi}-} and {Upsilon}(2S){pi}{sup +{pi}-} Production near the {Upsilon}(5S) Resonance

Abstract

We analyze the Belle data [K. F. Chen et al. (Belle Collaboration), Phys. Rev. Lett. 100, 112001 (2008); I. Adachi et al. (Belle Collaboration), arXiv:0808.2445] on the processes e{sup +}e{sup -{yields}{Upsilon}}(1S){pi}{sup +{pi}-},{Upsilon}(2S){pi}{sup +{pi}-} near the peak of the {Upsilon}(5S) resonance, which are found to be anomalously large in rates compared to similar dipion transitions between the lower {Upsilon} resonances. Assuming these final states arise from the production and decays of the J{sup PC}=1{sup --} state Y{sub b}(10 890), which we interpret as a bound (diquark-antidiquark) tetraquark state [bq][bq], a dynamical model for the decays Y{sub b{yields}{Upsilon}}(1S){pi}{sup +{pi}-},{Upsilon}(2S){pi}{sup +{pi}-} is presented. Depending on the phase space, these decays receive significant contributions from the scalar 0{sup ++} states, f{sub 0}(600) and f{sub 0}(980), and from the 2{sup ++} qq-meson f{sub 2}(1270). Our model provides excellent fits for the decay distributions, supporting Y{sub b} as a tetraquark state.

Authors:
; ;  [1];  [2]
  1. Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg (Germany)
  2. (Pakistan)
Publication Date:
OSTI Identifier:
21410640
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.104.162001; (c) 2010 The American Physical Society; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DECAY; DISTRIBUTION; ELECTRON-POSITRON INTERACTIONS; F0-980 MESONS; F2-1270 MESONS; PARTICLE PRODUCTION; PEAKS; PHASE SPACE; PIONS MINUS; PIONS PLUS; QUARKS; RESONANCE PARTICLES; BOSONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATHEMATICAL SPACE; MESONS; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; SCALAR MESONS; SPACE; TENSOR MESONS

Citation Formats

Ali, Ahmed, Hambrock, Christian, Aslam, M. Jamil, and Physics Department, Quaid-i-Azam, University, Islamabad. Tetraquark Interpretation of the BELLE Data on the Anomalous {Upsilon}(1S){pi}{sup +{pi}-} and {Upsilon}(2S){pi}{sup +{pi}-} Production near the {Upsilon}(5S) Resonance. United States: N. p., 2010. Web. doi:10.1103/PHYSREVLETT.104.162001.
Ali, Ahmed, Hambrock, Christian, Aslam, M. Jamil, & Physics Department, Quaid-i-Azam, University, Islamabad. Tetraquark Interpretation of the BELLE Data on the Anomalous {Upsilon}(1S){pi}{sup +{pi}-} and {Upsilon}(2S){pi}{sup +{pi}-} Production near the {Upsilon}(5S) Resonance. United States. doi:10.1103/PHYSREVLETT.104.162001.
Ali, Ahmed, Hambrock, Christian, Aslam, M. Jamil, and Physics Department, Quaid-i-Azam, University, Islamabad. Fri . "Tetraquark Interpretation of the BELLE Data on the Anomalous {Upsilon}(1S){pi}{sup +{pi}-} and {Upsilon}(2S){pi}{sup +{pi}-} Production near the {Upsilon}(5S) Resonance". United States. doi:10.1103/PHYSREVLETT.104.162001.
@article{osti_21410640,
title = {Tetraquark Interpretation of the BELLE Data on the Anomalous {Upsilon}(1S){pi}{sup +{pi}-} and {Upsilon}(2S){pi}{sup +{pi}-} Production near the {Upsilon}(5S) Resonance},
author = {Ali, Ahmed and Hambrock, Christian and Aslam, M. Jamil and Physics Department, Quaid-i-Azam, University, Islamabad},
abstractNote = {We analyze the Belle data [K. F. Chen et al. (Belle Collaboration), Phys. Rev. Lett. 100, 112001 (2008); I. Adachi et al. (Belle Collaboration), arXiv:0808.2445] on the processes e{sup +}e{sup -{yields}{Upsilon}}(1S){pi}{sup +{pi}-},{Upsilon}(2S){pi}{sup +{pi}-} near the peak of the {Upsilon}(5S) resonance, which are found to be anomalously large in rates compared to similar dipion transitions between the lower {Upsilon} resonances. Assuming these final states arise from the production and decays of the J{sup PC}=1{sup --} state Y{sub b}(10 890), which we interpret as a bound (diquark-antidiquark) tetraquark state [bq][bq], a dynamical model for the decays Y{sub b{yields}{Upsilon}}(1S){pi}{sup +{pi}-},{Upsilon}(2S){pi}{sup +{pi}-} is presented. Depending on the phase space, these decays receive significant contributions from the scalar 0{sup ++} states, f{sub 0}(600) and f{sub 0}(980), and from the 2{sup ++} qq-meson f{sub 2}(1270). Our model provides excellent fits for the decay distributions, supporting Y{sub b} as a tetraquark state.},
doi = {10.1103/PHYSREVLETT.104.162001},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 16,
volume = 104,
place = {United States},
year = {2010},
month = {4}
}