Measurement of the branching fraction of $B^+ \to \tau^+ \nu_\tau$ decays with the semileptonic tagging method - INSPIRE

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Measurement of the branching fraction of $B^+ \to \tau^+ \nu_\tau$ decays with the semileptonic tagging method

Belle

Collaboration

•

B. Kronenbitter
(
- KIT, Karlsruhe, EKP
)

Mar 18, 2015

8 pages

Published in:

Phys.Rev.D 92 (2015) 5, 051102

Published: Sep 17, 2015

e-Print:

1503.05613 [hep-ex]

DOI:

10.1103/PhysRevD.92.051102

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\mathit \tau}^{+}}{{\mathit \nu}_{{{\tau}}}}

Report number:

KEK-PREPRINT-2014-47

Experiments:

KEK-BF-BELLE

View in:

reference search121 citations

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Abstract: (APS)

We report a measurement of the branching fraction of B+→τ+ντ decays using a data sample of 772×106BB¯ pairs, collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We reconstruct the accompanying B meson in a semileptonic decay and detect the recoiling B candidate in the decay channel B+→τ+ντ. We obtain a branching fraction of B(B+→τ+ντ)=[1.25±0.28(stat.)±0.27(syst.)]×10−4. This result is in good agreement with previous measurements and the expectation from the calculation based on the Standard Model.

Note:

accepted by PRD(RC)

13.20.He
14.40.Nd
electron positron: annihilation
electron positron: colliding beams
B: pair production
B+: leptonic decay
B+: branching ratio: measured
Upsilon(10570): electroproduction
B-: semileptonic decay
BELLE

References(23)

Figures(6)

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