Using a sample of 1.06×108 ψ′ decays collected by the BESIII detector, χc0 and χc2 decays into π0π0 and ηη are studied. The branching fraction results are Br(χc0→π0π0)=(3.23±0.03±0.23±0.14)×10-3, Br(χc2→π0π0)=(8.8±0.2±0.6±0.4)×10-4, Br(χc0→ηη)=(3.44±0.10±0.24±0.2)×10-3, and Br(χc2→ηη)=(6.5±0.4±0.5±0.3)×10-4, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of ψ′→γχcJ. The results provide information on the decay mechanism of χc states into pseudoscalars.
Branching fraction measurements of χc0 and χc2 to π0π0 and ηη
DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2010-01-01
Abstract
Using a sample of 1.06×108 ψ′ decays collected by the BESIII detector, χc0 and χc2 decays into π0π0 and ηη are studied. The branching fraction results are Br(χc0→π0π0)=(3.23±0.03±0.23±0.14)×10-3, Br(χc2→π0π0)=(8.8±0.2±0.6±0.4)×10-4, Br(χc0→ηη)=(3.44±0.10±0.24±0.2)×10-3, and Br(χc2→ηη)=(6.5±0.4±0.5±0.3)×10-4, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of ψ′→γχcJ. The results provide information on the decay mechanism of χc states into pseudoscalars.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
PRD81(2010)052005.pdf
Accesso riservato
Tipo di file:
POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione
329.72 kB
Formato
Adobe PDF
|
329.72 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.