Search for the decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><msup><mi>K</mi><mrow><mo>*</mo><mn>0</mn></mrow></msup><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>-</mo></msup></math> at the Belle experiment - INSPIRE

DataBETA

Search for the decay $B^{0} \to K^{* 0} τ^{+} τ^{-}$ at the Belle experiment

Belle

Collaboration

•

T.V. Dong
(
- Fudan U.
)

Oct 7, 2021

9 pages

Published in:

Phys.Rev.D 108 (2023) 1, L011102

Published: Jul 1, 2023

e-Print:

2110.03871 [hep-ex]

DOI:

10.1103/PhysRevD.108.L011102 (publication)

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit K}^{*}{(892)}^{0}}{{\mathit \tau}^{+}}{{\mathit \tau}^{-}}

Report number:

Belle Preprint 2021-21,
KEK Preprint 2021-25

Experiments:

KEK-BF-BELLE

View in:

reference search34 citations

Citations per year

Abstract: (APS)

This paper presents a search for the rare flavor-changing neutral current process

B^{0} \to K^{* 0} τ^{+} τ^{-}

using data taken with the Belle detector at the KEKB asymmetric energy

e^{+} e^{-}

collider. The analysis is based on the entire

ϒ (4 S)

resonance data sample of

711 {fb}^{- 1}

, corresponding to

772 \times 10^{6} B \bar{B}

pairs. In our search we fully reconstruct the companion

B

meson produced in the process

e^{+} e^{-} \to ϒ (4 S) \to B \bar{B}

from its hadronic decay modes, and look for the decay

B^{0} \to K^{* 0} τ^{+} τ^{-}

in the rest of the event. No evidence for a signal is found. We report an upper limit on the branching fraction

B (B^{0} \to K^{* 0} τ^{+} τ^{-}) < 3.1 \times 10^{- 3}

at 90% confidence level. This is the first direct limit on

B (B^{0} \to K^{* 0} τ^{+} τ^{-})

.

Note:

8 pages, 3 figures, accepted by PRD as a Letter

electron positron: annihilation
electron positron: colliding beams
Upsilon(10570): electroproduction
B: pair production
B0: semileptonic decay
B0: rare decay
K*(892)0
tau: pair production
energy: asymmetry
neutral current: flavor changing

References(43)

Figures(3)

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