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Observation of a new charged charmoniumlike state in B -> J/psi K pi
decays
release_debtuogganfwvdbzavt4hucwlm
by
Belle Collaboration: K. Chilikin,
R. Mizuk,
I. Adachi,
H. Aihara,
S.
Al Said,
K. Arinstein,
D. M. Asner,
V. Aulchenko,
T. Aushev,
R. Ayad,
T.
Aziz,
A. M. Bakich
(+144 others)
Released
as a article
.
2014
Abstract
We present the results of an amplitude analysis of anti-B0 -> J/psi K- pi+
decays. A new charged charmoniumlike state Zc(4200)+ decaying to J/psi pi+ is
observed with a significance of 6.2 sigma. The mass and width of the Zc(4200)+
are 4196 +31-29 +17-13 MeV/c^2 and 370 +70-70 +70-132 MeV, respectively; the
preferred assignment of the quantum numbers is J^P = 1^+. In addition, we find
evidence for Zc(4430)+ -> J/psi pi+. The analysis is based on a 711 fb^-1 data
sample collected by the Belle detector at the asymmetric-energy e+ e- collider
KEKB.
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1408.6457v3
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