Radiative decays of the psi (3684) into high-mass states

Journal Article · Sat Apr 01 00:00:00 EST 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.17.1731· OSTI ID:6929041

Tanenbaum, W; Alam, M S; Boyarski, A M; Breidenbach, M; Feldman, G J; Hanson, G; Jaros, J A; Larsen, R R; Lueke, D; Lueth, V; Lynch, H L; Paterson, J M; Perl, M L; Peruzzi, I; Piccolo, M; Pun, T P; Rapidis, P; Richter, B; Schindler, R H; Schwitters, R F ; Siegrist, J; Vannucci, F; Trilling, G H; Whitaker, J S; Abrams, G S; Chinowksy, W; DeVoe, R G; Friedberg, C E; Goldhaber, G; Johnson, A D; Kadyk, J A; Madaras, R J; Nguyen, H K; Pierre, F M; Sadoulet, B; Wiss, J E

Results of studies of radiative decays of the psi (3684) using the SLAC-LBL magnetic detector at the electron storage ring SPEAR are presented. There are three high-mass states produced in psi (3684) radiative decays, with masses of 3414 +- 3, 3503 +- 4, and 3551 +- 4 MeV where the errors given do not include an overall mass-scale uncertainty of +- 4 MeV. There is some evidence for a fourth such state at either 3455 or 3340 MeV. The branching ratio for psi (3684) radiative decay into the state at 3414 MeV is found to be (7.5 +- 2.6%). The decay modes of these states into hadrons and into ..gamma..psi (3095) are studied, yielding information about the branching ratios, spins, and parities of the states. The results are interpreted in the charmonium picture of the high-mass states.

• Research Organization: Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305
• OSTI ID: 6929041
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 17:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BOSONS
BRANCHING RATIO
CHARMONIUM
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HADRONS
MEASURING INSTRUMENTS
MESON RESONANCES
MESONS
PARITY
PARTICLE PROPERTIES
PROPORTIONAL COUNTERS
PSI RESONANCES
PSI-3695 RESONANCES
RADIATION DETECTORS
RESONANCE PARTICLES
SPIN
VECTOR MESONS