Contribution of the direct decay phi -> pi(+) pi(-) gamma to the process e(+)e(-) pi(+) pi(-) gamma at DA Phi NE

Authors
Melnikov, K Nguyen, F Valeriani, B Venanzoni, G
Citation
K. Melnikov et al., Contribution of the direct decay phi -> pi(+) pi(-) gamma to the process e(+)e(-) pi(+) pi(-) gamma at DA Phi NE, PHYS LETT B, 477(1-3), 2000, pp. 114-124
Citations number
11
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
477
Issue
1-3
Year of publication
2000
Pages
114 - 124
Database
ISI
SICI code
0370-2693(20000323)477:1-3<114:COTDDP>2.0.ZU;2-2
Abstract
The potential of DA Phi NE to explore direct radiative decay Phi --> pi(+)p i(-)gamma is studied in detail. Predictions of different theoretical models for this decay are compared. We find that it should be possible to discrim inate between these models at DA Phi NE in one year, even assuming a relati vely low luminosity L=10(31)cm(-2)s(-1). The influence of the decay phi --> pi(+)pi(-)gamma on the measurement of total cross section sigma(e(+)e(-) - -> hydrons) by tagging a photon in the reaction e(+)e(-) --> pi(+)pi(-)gamm a is also discussed. (C) 2000 Published by Elsevier Science B.V. All rights reserved.