Radiative Decays and the Nature of Heavy Quarkonia

Journal Article · Fri Mar 24 00:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.96.1· OSTI ID:20778826

Garcia i Tormo, Xavier; Soto, Joan ^[1]

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1. Departament d'Estructura i Constituents de la Materia, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Catalonia (Spain)

We argue that the photon spectra in radiative decays of various heavy quarkonium states provide important information on their nature. If two of these states are in the strong coupling regime, we are able to produce a parameter-free model-independent formula, which holds at next-to-leading order and includes both direct and fragmentation contributions. When the formula is checked against recent CLEO data it favors {upsilon}(2S) and {upsilon}(3S) in the strong coupling regime and disfavors {upsilon}(1S) in it.

• OSTI ID: 20778826
• Journal Information: Physical Review Letters, Vol. 96, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.96.111801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CESR STORAGE RING
FRAGMENTATION
MESONS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PHOTONS
QUANTUM CHROMODYNAMICS
QUARKONIUM
RADIATIVE DECAY
RESONANCE PARTICLES
STRONG-COUPLING MODEL