Confirmation of the $X(1835)$ and observation of the resonances $X(2120)$ and $X(2370)$ in $J/\psi\to \gamma \pi^+\pi^-\eta^\prime$ - INSPIRE

DataBETA

Confirmation of the $X(1835)$ and observation of the resonances $X(2120)$ and $X(2370)$ in $J/\psi\to \gamma \pi^+\pi^-\eta^\prime$

BESIII

Collaboration

Dec, 2010

6 pages

Published in:

Phys.Rev.Lett. 106 (2011) 072002

e-Print:

1012.3510 [hep-ex]

DOI:

10.1103/PhysRevLett.106.072002

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

{{\mathit \gamma}}{{\mathit X}{(1835)}}

\rightarrow

{{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}

Experiments:

View in:

reference search207 citations

Citations per year

Abstract: (arXiv)

With a sample of (225.2\pm2.8)*10^{6} J/psi events registered in the BESIII detector, J/psi->gamma pi^+ pi^- eta' is studied using two eta' decay modes: eta'->pi^+ pi^- eta and eta' -> gamma rho^0. The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20\sigma. In addition, in the pi^+pi^-eta' invariant mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2\sigma and 6.4\sigma, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.

13.75.Cs
12.39.Mk
12.40.Yx
13.20.Gd
Xi(2370)
Xi(2120)
Xi(1835)
eta(958): decay modes
BES
photon: angular distribution

References(21)

Figures(0)

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