The decays [eta][r arrow][pi][mu][ital e]
Journal Article
·
· Physical Review, D (Particles Fields); (United States)
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
We analyze the available information on the interactions that can contribute to the decays [eta][r arrow][pi][sup 0][mu][sup [plus minus]][ital e][sup [minus plus]], and discuss the implications for the [eta][r arrow][pi][sup 0][mu][sup [plus minus]][ital e][sup [minus plus]] branching ratios. For all cases the experimental results on [mu][sup [minus]][r arrow][ital e][sup [minus]] conversion in nuclei set stringent limits on the strength of the interactions. For the case of a scalar interaction, which in renormalizable gauge theories is the only possible source of [eta][r arrow][pi][sup 0][mu][sup [plus minus]][ital e][sup [minus plus]] at the tree level, we find [ital B]([eta][r arrow][pi][sup 0][mu][sup [plus minus]][ital e][sup [minus plus]])[approx lt]4[times]10[sup [minus]18]. For interactions involving second-class currents the branching ratio is not likely to be larger than [similar to]10[sup [minus]15], which is still considerably below the level that could be explored at present.
- OSTI ID:
- 6718060
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:1; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
DECAY
ELECTRONS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
HADRONS
LEPTONS
MATTER
MESONS
MUONS
MUONS MINUS
MUONS PLUS
PARTICLE DECAY
PIONS
PIONS NEUTRAL
POSITRONS
PSEUDOSCALAR MESONS
SEMILEPTONIC DECAY
WEAK PARTICLE DECAY
Conservation Laws
Currents & Their Properties-- (1992-)
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
BRANCHING RATIO
DECAY
ELECTRONS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
HADRONS
LEPTONS
MATTER
MESONS
MUONS
MUONS MINUS
MUONS PLUS
PARTICLE DECAY
PIONS
PIONS NEUTRAL
POSITRONS
PSEUDOSCALAR MESONS
SEMILEPTONIC DECAY
WEAK PARTICLE DECAY