B{sup (*)}B{sup (*)} intermediate states contribution to {Upsilon}(4S,5S){yields}{eta}{sub b}+{gamma} radiative decay

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.054030· OSTI ID:21432982

Ke, Hong-Wei; Li, Xue-Qian; Liu, Xiang ^[1]

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1. School of Science, Tianjin University, Tianjin 300072 (China)

In this work, we investigate the rescattering effects in the radiative decay {Upsilon}(5S){yields}{eta}{sub b}+{gamma}, which were suggested to be crucially important for understanding the anomalous largeness of the branching ratios B({Upsilon}(5S){yields}{Upsilon}(1S)+{pi}{pi}) and B({Upsilon}(5S){yields}{Upsilon}(1S)+{eta}). Our calculations show that the rescattering effects may enhance {Gamma}({Upsilon}(10860){yields}{eta}{sub b}+{gamma}) by four orders, but the tetraquark structure does not. Recently the BABAR and CLEO collaborations have measured the mass of {eta}{sub b} and the branching ratios B({Upsilon}(2S){yields}{eta}{sub b}+{gamma}), B({Upsilon}(3S){yields}{eta}{sub b}+{gamma}). We hope that very soon, {Upsilon}(10860){yields}{eta}{sub b}+{gamma} will be measured and it would be an ideal opportunity for testing whether the rescattering or the tetraquark structure is responsible for the anomaly of B({Upsilon}(5S){yields}{Upsilon}(nS){pi}{sup +}{pi}{sup -}(n=1,2,3)), i.e., the future measurements on the radiative decays of {Upsilon}(5S) might be a touchstone of the two mechanisms.

• OSTI ID: 21432982
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevD.82.054030; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CESR STORAGE RING
GAMMA RADIATION
INTERMEDIATE STATE
MASS
MESON-MESON INTERACTIONS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PIONS MINUS
PIONS PLUS
RADIATIVE DECAY
RESCATTERING
UPSILON-10860 MESONS
BOSONS
BOTTOMONIUM
DECAY
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
IONIZING RADIATIONS
MEASURING INSTRUMENTS
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
QUARKONIUM
RADIATIONS
SCATTERING
SPECTROMETERS
STORAGE RINGS
VECTOR MESONS