Upsilon. (10580) r arrow J /. psi. + X in a color hybrid model

Journal Article · Wed Apr 01 04:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.2397· OSTI ID:7044154

Carson, L; Coulter, P W; Jones, S T ^[1]

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1. Department of Physics and Astronomy, University of Alabama, Box 870324, Tuscaloosa, Alabama 35487 (United States)

Estimates are presented for the decay width of the inclusive process {Upsilon}{sub 8}{r arrow}{ital J}/{psi}+{ital X}, where {Upsilon}{sub 8} is a color hybrid {ital b{bar b}g} of the {Upsilon}(4{ital S}) in which the {ital b} and {ital {bar b}} quarks occupy a {sup 1}{ital S}{sub 0} color-octet state. Invoking the color evaporation hypothesis, we find that {Gamma}({Upsilon}{sub 8}{r arrow}{ital J}/{psi}+{ital X}){le}{Gamma}({Upsilon}{sub 8}{r arrow}{ital c{bar c}g}){congruent}2.8 keV when the invariant mass of the {ital c{bar c}} pair is constrained to lie below the open charm threshold of 2{ital M}{sub {ital D}}. Suppression factors due to conversion of the {ital c{bar c}} pair into {ital J}/{psi} and to mixing with the color-singlet state are expected to lead to an observed rate for {Upsilon}(10580){r arrow}{ital J}/{psi}+{ital X} that is comparable to {Gamma}({Upsilon}(1{ital S}){r arrow}{ital J}/{psi}+{ital X}){congruent}60 eV, and thus consistent with experimental bounds on the non-{ital B{bar B}} decay modes of the {Upsilon}(10580).

• DOE Contract Number: FG05-84ER40141
• OSTI ID: 7044154
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:7; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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BEAUTY PARTICLES
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CHARMONIUM
COLOR MODEL
COMPOSITE MODELS
D STATES
DECAY
ELEMENTARY PARTICLES
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POSTULATED PARTICLES
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QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
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