Problems with hadronic. eta. sub c decays and the perturbative QCD scheme for exclusive reactions

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.3218· OSTI ID:5988665

Anselmino, M ^[1]; Caruso, F ^[2]; Murgia, F ^[3]

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1. Dipartimento di Scienze Fisiche, Universita di Cagliari, Cagliari (Italy) Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Via A. Negri 18, I-09127 Cagliari (Italy)
2. Centro Brasileiro de Pesquisas Fisicas, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Rua Dr. Xavier Sigaud 150, 22290, Rio de Janeiro (Brazil)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Via A. Negri 18, I-09127 Cagliari (Italy)

We consider some observed decays of the {eta}{sub {ital c}} which should be forbidden in the perturbative QCD description of exclusive reactions: {eta}{sub {ital c}}{r arrow}{rho}{rho},{ital K}{sup *}{ital {bar K}*},{phi}{phi}. It is shown explicitly that quark mass corrections do not help and still give a zero result. Also the experimental value for the decay rate {Gamma}({eta}{sub {ital c}}{r arrow}{ital p{bar p}}) is argued to be anomalously large. Implications for the perturbative QCD scheme are discussed, and some other possible explanations of the data are suggested.

• OSTI ID: 5988665
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BOSONS
BOUND STATE
CHARMONIUM
COLOR MODEL
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
ETA C-2980 MESONS
EXCLUSIVE INTERACTIONS
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FUNCTIONS
HADRONIC PARTICLE DECAY
HADRONS
INTERACTIONS
KAONS
MASS
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PERTURBATION THEORY
PHI-1020 MESONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
QUARKS
RHO-770 MESONS
SPIN
STRANGE MESONS
STRANGE PARTICLES
STRANGEONIUM
VECTOR MESONS
WAVE FUNCTIONS