We report the first measurement of absolute hadronic branching fractions of Λþc baryon at the Λþc Λ ̄ −c production threshold, in the 30 years since the Λþc discovery. In total, 12 Cabibbo-favored Λþc hadronic decay modes are analyzed with a double-tag technique, based on a sample of 567 pb−1 of eþe− collisions pffiffi at s 1⁄4 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 Λþc decay modes, the branching fraction for Λþc → pK−πþ is determined to be ð5.84 ` 0.27 ` 0.23Þ%, 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

AMOROSO, Antonio;BIANCHI, Fabrizio;DESTEFANIS, Marco Giovanni Maria;DE MORI, FRANCESCA;FAVA, Luciano;GRECO, Michela;HU, Jifeng;MAGGIORA, MARCO;MARCELLO, Simonetta;SOSIO, Stefano;SPATARO, STEFANO GIOVANNI;ZOTTI, LAURA;
2016-01-01

Abstract

We report the first measurement of absolute hadronic branching fractions of Λþc baryon at the Λþc Λ ̄ −c production threshold, in the 30 years since the Λþc discovery. In total, 12 Cabibbo-favored Λþc hadronic decay modes are analyzed with a double-tag technique, based on a sample of 567 pb−1 of eþe− collisions pffiffi at s 1⁄4 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 Λþc decay modes, the branching fraction for Λþc → pK−πþ is determined to be ð5.84 ` 0.27 ` 0.23Þ%, 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.
2016
116
5
052001-1
052001-7
http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.116.052001/apsxml
https://arxiv.org/abs/1511.08380
Physics and Astronomy (all)
Ablikim, M.; Achasov, M.N.; Ai, X.C.; Albayrak, O.; Albrecht, M.; Ambrose, D.J.; Amoroso, A.; An, F.F.; An, Q.; Bai, J.Z.; Baldini Ferroli, R.; Ban, Y...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1634519
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