Signature of the triangle singularity in the reaction [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]][pi][sup 0]
- Laboratory of Theoretical Physics, Institute for Mathematics, 630090, Novosibirsk 90, Russian Federation ( )
The singularity caused by the decay kinematics in the vertices of the triangle diagram is shown to imply the distortion of the patterns of [rho][omega] interference in the [pi][sup +][pi][sup [minus]] mass spectrum of the reaction [ital e][sup +][ital e][sup [minus]][r arrow][rho][pi]+[omega][pi][r arrow][pi][sup +][pi][sup [minus]][pi][sup 0] at energies in the range 0.95 GeV[le] [radical][ital s] [le]1.4 GeV. In the total cross section the singularity manifests itself as a measurable decrease of the cross section magnitude at energies in between [omega] and [ital cphi] peaks. The studies of the effect at [ital e][sup +][ital e][sup [minus]] colliders with a luminosity of [ital L]=10[sup 31] cm[sup [minus]2]s[sup [minus]1] or higher could be of great interest as a tool for testing the self-consistency of calculations going beyond the tree approximation and as a possibility to obtain additional information on the mechanisms of the OZI rule and [ital G] parity breakings.
- OSTI ID:
- 7239048
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Vol. 49:11; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON-POSITRON INTERACTIONS
SINGULARITY
G PARITY
LUMINOSITY
MASS SPECTRA
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
TOTAL CROSS SECTIONS
BOSONS
CROSS SECTIONS
ELEMENTARY PARTICLES
HADRONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESONS
OPTICAL PROPERTIES
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PIONS
PSEUDOSCALAR MESONS
SPECTRA
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