Observation of the baryonic $B$ decay $\bar{B}^0\to \Lambda_c^+ \bar{\Lambda} K^-$ - INSPIRE

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Observation of the baryonic $B$ decay $\bar{B}^0\to \Lambda_c^+ \bar{\Lambda} K^-$

BaBar

Collaboration

Aug, 2011

7 pages

Published in:

Phys.Rev.D 84 (2011) 071102

e-Print:

1108.3211 [hep-ex]

DOI:

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\overline{\mathit \Lambda}}_{{{c}}}^{-}}{{\mathit \Lambda}}{{\mathit K}^{+}}

Report number:

SLAC-PUB-14465,
BABAR-PUB-11-012

Experiments:

SLAC-PEP2-BABAR

View in:

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Abstract: (arXiv)

We report the observation of the baryonic B decay B0bar --> Lambda_c^+ anti-Lambda K- with a significance larger than 7 standard deviations based on 471x10^6$ BBbar pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B0bar --> Lambda_c^+ anti-Lambda K- to be (3.8 \pm 0.8_{stat} \pm 0.2_{sys} \pm 1.0_{Lambda_c^+})x10^{-5}. The uncertainties are statistical, systematic, and due to the uncertainty in the Lambda_c^+ branching fraction. We find that the Lambda_c^+ K^- invariant mass distribution shows an enhancement above 3.5 GeV/c^2.

Note:

7 pages, 7 figures, submitted to Phys. Rev. D (Rapid Communications)

14.20.Lq
13.60.Rj
13.25.Hw
anti-B0: hadronic decay
anti-B0: branching ratio
mass spectrum: (Lambda/c+ K-)
BaBar
electron positron: annihilation
B: pair production
experimental results

References(6)

Figures(8)

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

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•
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The EvtGen particle decay simulation package

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(
- LLNL, Livermore
)

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•
DOI:
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GEANT4 - A Simulation Toolkit

GEANT4

Collaboration

•

S. Agostinelli
(
- Genoa U.
)

et al.

- Nucl.Instrum.Meth.A 506 (2003) 250-303
•
DOI:
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The BaBar detector

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Nucl.Instrum.Meth.A 479 (2002) 1-116
•
e-Print:
- hep-ex/0105044
•
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Observation of CP violation in $B^0 \to K^{+} \pi^{-}$ and $B^0 \to \pi^{+} \pi^{-}$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

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•
e-Print:
- hep-ex/0703016
•
DOI:
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Observation of the baryonic B-decay anti-B0 ---> Lambda(c)+ anti-p K- pi+

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

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•
e-Print:
- 0907.4566
•
DOI:
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