Search for the $B \to Y(4260) K, ~Y(4260) \to J/\psi \pi^+\pi^-$ decays - INSPIRE

DataBETA

Search for the $B \to Y(4260) K, ~Y(4260) \to J/\psi \pi^+\pi^-$ decays

Belle

Collaboration

•

R. Garg
(
- Panjab U.
)

Jan 19, 2019

8 pages

Published in:

Phys.Rev.D 99 (2019) 7, 071102

Published: Apr 13, 2019

e-Print:

1901.06470 [hep-ex]

DOI:

10.1103/PhysRevD.99.071102

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\mathit \psi}{(4230)}^{0}}{{\mathit K}^{+}}

{{\mathit \psi}^{0}}

\rightarrow

{{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}

Report number:

Belle Preprint # 2019-01 KEK Preprint #: 2018-85

Experiments:

KEK-BF-BELLE

View in:

reference search7 citations

Citations per year

Abstract: (APS)

We report the results of a search for the B→Y(4260)K, Y(4260)→J/ψπ+π- decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb-1, collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We investigate the J/ψπ+π- invariant mass distribution in the range 4.0 to 4.6 GeV/c2 using both B+→J/ψπ+π-K+ and B0→J/ψπ+π-KS0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B→Y(4260)K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B(B+→Y(4260)K+)×B(Y(4260)→J/ψπ+π-)<1.4×10-5 and B(B0→Y(4260)K0)×B(Y(4260)→J/ψπ+π-)<1.7×10-5 at the 90% confidence level.

Note:

8 pages, 3 figures, 3 tables

electron positron: annihilation
electron positron: colliding beams
B+: hadronic decay
B0: hadronic decay
Y(4260): hadronic decay
J/psi(3100)
pi: pair production
B+: branching ratio
B0: branching ratio
Y(4260): branching ratio

References(43)

Figures(3)

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