Observation of the decay rho. --> pi. /sup +/. pi. /sup -/. gamma

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6592675

Vasserman, I B; Golubev, V B; Dolinskii, S I; Druzhinin, V P; Dubrovin, M S; Ivanov, P M; Ivanchenko, V N; Pakhtusova, E V; Peryshkin, A N; Serednyakov, S I; others, and

The Neutral Detector at the electron-positron collidor VEPP-2M has been used to observe the rare decay rho..--> pi../sup +/..pi../sup -/..gamma.. with a relative probability BR(rho..--> pi../sup +/..pi../sup -/..gamma..) = (1.11 + 0.14).10/sup -2/ for photon energy >50 MeV. The decay probability and the shape of the photon energy spectrum agree with the bremsstrahlung mechanism of decay. A limit is established on the probability of structure radiation: BR(rho..--> pi../sup +/..pi../sup -/..gamma..)/sub s/<5x10/sup -3/ at the 90% confidence level.

• Research Organization: Institute of Nuclear Physics, Siberian Division, USSR Academy of Sciences
• OSTI ID: 6592675
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 47:6; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Electromagnetic Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BREMSSTRAHLUNG
DATA
ELECTROMAGNETIC RADIATION
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
GAMMA RADIATION
GAMMA SPECTRA
HADRONS
INFORMATION
INTERACTIONS
IONIZING RADIATIONS
LEPTON-LEPTON INTERACTIONS
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PIONS
PIONS MINUS
PIONS PLUS
PROBABILITY
PSEUDOSCALAR MESONS
RADIATIONS
RADIATIVE DECAY
RHO-770 MESONS
SPECTRA
VECTOR MESONS