Measurement of the Branching Fraction $\mathcal B(\Lambda_c^+ \to p K^- \pi^+)$

Zupanc, A.; Bartel, C.; Gabyshev, N.; Adachi, I.; Aihara, H.; Asner, D.M.; Aulchenko, V.; Aushev, T.; Bakich, A.M.; Bala, A.

doi:10.1103/PhysRevLett.113.042002

Measurement of the Branching Fraction $\mathcal B(\Lambda_c^+ \to p K^- \pi^+)$

Belle

Collaboration

Dec 30, 2013

7 pages

Published in:

Phys.Rev.Lett. 113 (2014) 4, 042002

Published: Jul 25, 2014

e-Print:

1312.7826 [hep-ex]

DOI:

10.1103/PhysRevLett.113.042002

PDG:

{{\mathit \Lambda}_{{{c}}}^{+}}

\rightarrow

{{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}

Report number:

BELLE-PREPRINT-2013-30,
KEK-PREPRINT-2013-58

Experiments:

KEK-BF-BELLE

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Abstract: (APS)

We present the first model-independent measurement of the absolute branching fraction of the Λc+→pK-π+ decay using a data sample of 978 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The number of Λc+ baryons is determined by reconstructing the recoiling D(*)-p¯π+ system in events of the type e+e-→D(*)-p¯π+Λc+. The branching fraction is measured to be B(Λc+→pK-π+)=(6.84±0.24−0.27+0.21)%, where the first and second uncertainties are statistical and systematic, respectively.

14.20.Lq
13.30.Eg
13.66.Bc
BELLE
KEK-B
electron positron: annihilation
Lambda/c+: hadronic decay
Lambda/c+: branching ratio: measured
mass: recoil
mass spectrum: missing-mass

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