Observation of a new charged charmoniumlike state in $\bar{B}^0 → J/ψK^-π^+$ decays

Chilikin, K.; Mizuk, R.; Adachi, I.; Aihara, H.; Said, S.Al; Arinstein, K.; Asner, D.M.; Aulchenko, V.; Aushev, T.; Ayad, R.

doi:10.1103/PhysRevD.90.112009

Observation of a new charged charmoniumlike state in $\bar{B}^0 → J/ψK^-π^+$ decays

Belle

Collaboration

Aug 27, 2014

14 pages

Published in:

Phys.Rev.D 90 (2014) 11, 112009

Published: Dec 16, 2014

e-Print:

1408.6457 [hep-ex]

DOI:

10.1103/PhysRevD.90.112009

PDG:

{{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(4430)}^{+}}

\rightarrow

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

Report number:

BELLE-PREPRINT-2014-12,
KEK-PREPRINT-2014-19

Experiments:

KEK-BF-BELLE

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Abstract: (APS)

We present the results of an amplitude analysis of B¯0→J/ψK-π+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to J/ψπ+ is observed with a significance of 6.2σ. The mass and width of the Zc(4200)+ are 4196-29-13+31+17 MeV/c2 and 370-70-132+70+70 MeV, respectively; the preferred assignment of the quantum numbers is JP=1+. In addition, we find evidence for Zc(4430)+→J/ψπ+. The analysis is based on a 711 fb−1 data sample collected by the Belle detector at the asymmetric-energy e+e- collider KEKB.

Note:

14 pages, 13 figures

14.40.Rt
13.25.-k
14.40.Nd
mass spectrum: (J/psi(3100) pi+)
decay: amplitude analysis
electron positron: annihilation
quantum number
BELLE
KEK-B
charmonium: hadron spectroscopy

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Observation of a new charged charmoniumlike state in Bˉ0→J/ψK−π+\bar{B}^0 → J/ψK^-π^+Bˉ0→J/ψK−π+ decays

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Observation of a new charged charmoniumlike state in $\bar{B}^0 → J/ψK^-π^+$ decays