We report the first measurement of absolute hadronic branching fractions of Λc+ baryon at the Λc+Λ¯c- production threshold, in the 30 years since the Λc+ discovery. In total, 12 Cabibbo-favored Λc+ hadronic decay modes are analyzed with a double-tag technique, based on a sample of 567 pb-1 of e+e- collisions at s=4.599 GeV recorded with the BESIII detector. A global least-squares fitter is utilized to improve the measured precision. Among the measurements for twelve Λc+ decay modes, the branching fraction for Λc+→pK-π+ is determined to be (5.84±0.27±0.23)%, where the first uncertainty is statistical and the second is systematic. In addition, the measurements of the branching fractions of the other 11 Cabibbo-favored hadronic decay modes are significantly improved.
Measurements of Absolute Hadronic Branching Fractions of the Λc+ Baryon
FARINELLI, Riccardo;GARZIA, Isabella;SAVRIE', Mauro;
2016
Abstract
We report the first measurement of absolute hadronic branching fractions of Λc+ baryon at the Λc+Λ¯c- production threshold, in the 30 years since the Λc+ discovery. In total, 12 Cabibbo-favored Λc+ hadronic decay modes are analyzed with a double-tag technique, based on a sample of 567 pb-1 of e+e- collisions at s=4.599 GeV recorded with the BESIII detector. A global least-squares fitter is utilized to improve the measured precision. Among the measurements for twelve Λc+ decay modes, the branching fraction for Λc+→pK-π+ is determined to be (5.84±0.27±0.23)%, where the first uncertainty is statistical and the second is systematic. In addition, the measurements of the branching fractions of the other 11 Cabibbo-favored hadronic decay modes are significantly improved.File | Dimensione | Formato | |
---|---|---|---|
PhysRevLett.116.052001.pdf
solo gestori archivio
Descrizione: versione editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
272.5 kB
Formato
Adobe PDF
|
272.5 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
PhysRevLett.116.052001-accepted.pdf
accesso aperto
Descrizione: post print
Tipologia:
Post-print
Licenza:
PUBBLICO - Pubblico con Copyright
Dimensione
291.21 kB
Formato
Adobe PDF
|
291.21 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.