Dalitz decay. π0 → γe +e − and the π0 electromagnetic transition form factor

We have studied the π 0 Dalitz decay π 0 → γe +e − using the pion beam and a magnetic pair spectrometer at the Saclay Linear Accelerator. A shape analysis of the (e +e −) invariant mass squared x, carried out on 32 000 events, gives a direct measurement of the π 0 electromagnetic transition form fac...

Full description

Saved in:
Bibliographic Details
Published in:Physics letters. B 1989-12, Vol.233 (1), p.65-68
Main Authors: Fonvieille, H., Bensayah, N., Berthot, J., Bertin, P., Bihoreau, B., Crouau, M., Fournier, G., Giffon, M., Miller, J., Nahabetian, R., Saghai, B., Samour, C., Vernin, P.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied the π 0 Dalitz decay π 0 → γe +e − using the pion beam and a magnetic pair spectrometer at the Saclay Linear Accelerator. A shape analysis of the (e +e −) invariant mass squared x, carried out on 32 000 events, gives a direct measurement of the π 0 electromagnetic transition form factor squared | F( x)| 2, and of its slope parameter a in the expression F( x) = 1 + ax. We find a = −0.11±0.03(stat.)±0.08(syst.) m −2 π 0 .
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(89)90616-3