Study of Dalitz-Plot Distributions of the Decays $η \to π^{+} π^{-} π^{0}$ and $η \to π^{+} π^{-} γ$

Publisher Website

1 May 1973

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 7 (9) , 2565-2568
https://doi.org/10.1103/physrevd.7.2565

Abstract

Based on 80 884 events, we obtained the matrix element squared for the decay

η \to π^{+} π^{-} π^{0} : {| M (x, y) |}^{2} = 1 - (1.08 \pm 0.014) y + (0.03 \pm 0.03) y^{2} + (0.05 \pm 0.03) x^{2}

where

x

and

y

are the usual Dalitz-plot coordinates. The

γ

-ray energy spectrum was measured for 18 150

η \to π^{+} π^{-} γ

events.

ρ

dominance of the

π^{+} π^{-}

final state is strongly favored over a simple gauge-invariant matrix element.

Keywords

This publication has 12 references indexed in Scilit:

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