Peak shifts due to B{sup (*)}-B{sup (*)} rescattering in {upsilon}(5S) dipion transitions

Journal Article · Fri Aug 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.034022· OSTI ID:21250626

Ce, Meng ^[1]; Kuangta, Chao ^[1]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

We study the energy distributions of dipion transitions {upsilon}(5S) to {upsilon}(1S,2S,3S){pi}{sup +}{pi}{sup -} in the final-state rescattering model. Since the {upsilon}(5S) is well above the open bottom thresholds, the dipion transitions are expected to mainly proceed through the real processes {upsilon}(5S){yields}B{sup (*)}B{sup (*)} and B{sup (*)}B{sup (*)}{yields}{upsilon}(1S,2S,3S){pi}{sup +}{pi}{sup -}. We find that the energy distributions of {upsilon}(1S,2S,3S){pi}{sup +}{pi}{sup -} markedly differ from that of {upsilon}(5S){yields}B{sup (*)}B{sup (*)}. In particular, the resonance peak will be pushed up by about 7-20 MeV for these dipion transitions relative to the main hadronic decay modes. These predictions can be used to test the final-state rescattering mechanism in hadronic transitions for heavy quarkonia above the open flavor thresholds.

• OSTI ID: 21250626
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
ENERGY SPECTRA
FLAVOR MODEL
FORECASTING
HADRONIC PARTICLE DECAY
MEV RANGE 10-100
PEAKS
PIONS MINUS
PIONS PLUS
QUARKONIUM
RESCATTERING
RESONANCE