Radiative decay of J /. psi. into. eta. (1430) and nearby states

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.10· OSTI ID:6707887

Augustin, J; Cosme, G; Couchot, F; Fulda, F; Grosdidier, G; Jean-Marie, B; Lepeltier, V; Mane, F; Szklarz, G ^[1]; Jousset, J; Ajaltouni, Z; Falvard, A; Michel, B; Montret, J C ^[2]; Baldini, R; Calcaterra, A ^[3]; Bisello, D; Busetto, G; Castro, A; Pescara, L ; Sartori, P; Stanco, L ^[4]

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1. Laboratoire de l'Accelerateur Lineaire, Universite de Paris-Sud, F-91405 Orsay (France)
2. Laboratoire de Physique Corpusculaire, Universite de Clermont II, Boite Postale 45, F-63170 Aubiere (France)
3. Laboratori Nazionali di Frascati dell'Istituto Nazionale de Fisica Nucleare, Cassella Postale 13, I-00044 Frascati (Italy)
4. Dipartimento di Fisica dell'Universita di Padova, e Istituto Nazionale de Fisica Nucleare, Sezione di Padova, I-35131 Padua (Italy)

Radiative decays of {ital J}/{psi} into {ital K}{sup +}{ital K}{sup {minus}}{pi}{sup 0}, {ital K}{sub {ital S}}{sup 0}{ital K}{sup {plus minus}}{pi}{sup {minus plus}}, {eta}{pi}{sup +}{pi}{sup {minus}}, and {rho}{gamma} have been studied in the {eta}(1430) mass range from the 8.6{times}10{sup 6}{ital J}/{psi}'s produced in the DM2 experiment at the Orsay {ital e}{sup +}{ital e}{sup {minus}} storage ring (DCI). The {eta}(1430) is observed in both {ital K}{sub {ital S}}{sup 0}{ital K}{sup {plus minus}}{pi}{sup {minus plus}} and {ital K}{sup +}{ital K}{sup {minus}}{pi}{sup 0} channels. A three-body decay-angular analysis of the whole signal supports a {ital J}{sup {ital P}}=0{sup {minus}} assignment. A substantial {ital KK}{sup *}(892) dynamics is present whereas the significance of the {ital a}{sub 0}(980){pi} contribution cannot be evaluated. The {eta}(1430) is not observed in the {eta}{pi}{pi} channel which shows a peak in the {ital f}{sub 1}(1285)/{eta}(1275) mass range and a new state at 1398 MeV/{ital c}{sup 2}, {congruent}50 MeV/{ital c}{sup 2} wide. An {ital a}{sub 0}(980){pi} intermediate-state contribution is present at least in the latter state. Finally, the low-statistics {rho}{gamma} final state gives no evidence of {eta}(1430) production.

• OSTI ID: 6707887
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
AXIAL VECTOR MESONS
BOSONS
CHARMONIUM
DCI ORSAY STORAGE RING
ELEMENTARY PARTICLES
ETA-1275 MESONS
ETA-1440 MESONS
F1-1285 MESONS
HADRONS
J PSI-3097 MESONS
K -892 MESONS
KAONS
KAONS MINUS
KAONS NEUTRAL
KAONS NEUTRAL SHORT-LIVED
KAONS PLUS
MASSLESS PARTICLES
MESONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTONS
PIONS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS
QUARKONIUM
RADIATIVE DECAY
SPIN
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
TIME-OF-FLIGHT METHOD
VECTOR MESONS