Title

Determination of the quadratic slope parameter in eta -> 3 pi(0) decay

Publication Date

2001

Comments

The published version is located at http://prl.aps.org/abstract/PRL/v87/i19/e192001

Abstract

We have determined the quadratic slope parameter α for η→3π0 to be α = -0.031(4) from a 99% pure sample of 106η→3π0 decays produced in the reaction π-p→nη close to the η threshold using the Crystal Ball detector at the AGS. The result is four times more precise than the present world data and disagrees with current chiral perturbation theory calculations by about four standard deviations.

Pages

-

Volume

87

Issue

19

Journal Title

PHYSICAL REVIEW LETTERS