Study of the decay $\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}$ and its intermediate states

Lees, J.P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, David Nathan; Kerth, L.T.; Kolomensky, Yu. G.

doi:10.1103/PhysRevD.87.092004

Study of the decay $\bar{B}^{0}\rightarrow\Lambda_{c}^{+}\bar{p}\pi^{+}\pi^{-}$ and its intermediate states

BaBar

Collaboration

Feb, 2013

17 pages

Published in:

Phys.Rev.D 87 (2013) 9, 092004

Published: May 10, 2013

e-Print:

1302.0191 [hep-ex]

DOI:

10.1103/PhysRevD.87.092004

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\overline{\mathit \Lambda}}_{{{c}}}^{-}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}

Report number:

BABAR-PUB-12-028,
SLAC-PUB-15363

Experiments:

SLAC-PEP2-BABAR

View in:

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Abstract: (APS)

We study the decay B¯0→Λc+p¯π+π-, reconstructing the Λc+ baryon in the pK-π+ mode, using a data sample of 467×106 BB¯ pairs collected with the BABAR detector at the PEP-II storage rings at SLAC. We measure branching fractions for decays with intermediate Σc baryons to be B[B¯0→Σc(2455)++p¯π-]=(21.3±1.0±1.0±5.5)×10-5, B[B¯0→Σc(2520)++p¯π-]=(11.5±1.0±0.5±3.0)×10-5, B[B¯0→Σc(2455)0p¯π+]=(9.1±0.7±0.4±2.4)×10-5, and B[B¯0→Σc(2520)0p¯π+]=(2.2±0.7±0.1±0.6)×10-5, where the uncertainties are statistical, systematic, and due to the uncertainty on the Λc+→pK-π+ branching fraction, respectively. For decays without Σc(2455) or Σc(2520) resonances, we measure B[B¯0→Λc+p¯π+π-]non-Σc=(79±4±4±20)×10-5. The total branching fraction is determined to be B[B¯0→Λc+p¯π+π-]total=(123±5±7±32)×10-5. We examine multibody mass combinations in the resonant three-particle Σcp¯π final states and in the four-particle Λc+p¯π+π- final state, and observe different characteristics for the p¯π combination in neutral versus doubly charged Σc decays.

Note:

20 pages, 30 figures

14.20.Lq
13.60.Rj
13.25.Hw
anti-B0: hadronic decay
Lambda/c+: production
anti-B0: branching ratio: measured
BaBar
Sigma/c(2455): intermediate state
Sigma/c(2520): intermediate state
charmed baryon: charge

References(20)

Figures(31)

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