Experimental evidence for a light and broad scalar resonance in D+ -> pi(-)pi(+)pi(+) decay

Citation
Em. Aitala et al., Experimental evidence for a light and broad scalar resonance in D+ -> pi(-)pi(+)pi(+) decay, PHYS REV L, 86(5), 2001, pp. 770-774
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
5
Year of publication
2001
Pages
770 - 774
Database
ISI
SICI code
0031-9007(20010129)86:5<770:EEFALA>2.0.ZU;2-W
Abstract
From a sample of 1172 +/- 61 D+ --> pi (-) pi (+) pi (+) decays, we find Ga mma (D+ --> pi (-) pi (+) pi (+))/Gamma (D+ --> K- pi (+) pi (+)) = 0.0311 +/- 0.0018(-0.0026)(+0.0016). Using a coherent amplitude analysis to fit th e Dalitz plot of these decays, we find strong evidence that a scalar resona nce of mass 478(-23)(+24) +/- 17 MeV/c(2) and width 324(-40)(+42) +/- LI me V/c(2) accounts for approximately half or all decays.