Measurement of the Matrix Elements for the Decays $\eta \rightarrow \pi^{+}\pi^{-}\pi^0$ and $\eta/\eta^{\prime}\rightarrow\pi^0\pi^0\pi^0$ - INSPIRE

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Measurement of the Matrix Elements for the Decays $\eta \rightarrow \pi^{+}\pi^{-}\pi^0$ and $\eta/\eta^{\prime}\rightarrow\pi^0\pi^0\pi^0$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

Jun 17, 2015

11 pages

Published in:

Phys.Rev.D 92 (2015) 012014

Published: Jul 31, 2015

e-Print:

1506.05360 [hep-ex]

DOI:

10.1103/PhysRevD.92.012014

PDG:

\beta

decay parameter

Experiments:

BEPC-BES-III

View in:

reference search66 citations

Citations per year

Abstract: (APS)

Based on a sample of 1.31×109 J/ψ events collected with the BESIII detector at the BEPCII collider, Dalitz plot analyses of selected 79,625 η→π+π-π0 events, 33,908 η→π0π0π0 events, and 1,888 η′→π0π0π0 events are performed. The measured matrix elements of η→π+π-π0 are in reasonable agreement with previous measurements. The Dalitz plot slope parameters of η→π0π0π0 and η′→π0π0π0 are determined to be -0.055±0.014±0.004 and -0.640±0.046±0.047, respectively, where the first uncertainties are statistical and the second systematic. Both values are consistent with previous measurements, while the precision of the latter one is improved by a factor of 3. Final state interactions are found to have an important role in those decays.

Note:

12 pages, 7 figures

13.66.Bc
14.40.Be
electron positron: annihilation
J/psi(3100): electroproduction
eta: hadronic decay
eta(958): hadronic decay
Dalitz plot: slope
final-state interaction
Beijing Stor
statistical

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Figures(11)

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