STUDY OF ELECTRON-POSITRON ANNIHILATION INTO PI+PI- ON P0 RESONANCE

被引：129

作者：

AUGUSTIN, JE

BIZOT, JC

BUON, J

HAISSINSKI, J

LALANNE, D

MARIN, P

NGOC, HN

PEREZ, J

RUMPF, F

SILVA, E

TAVERNIER, S

机构：

[1] Ecole Normale Supérieure, Laboratoire de l'Accélérateur Linéaire, Orsay

来源：

PHYSICS LETTERS B | 1969年 / B 28卷 / 07期

关键词：

D O I：

10.1016/0370-2693(69)90529-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The electromagnetic form factor of the pion has been determined in the ρ{variant}o resonance region by measuring the absolute cross section of the reaction e+e-→π+π- with the Orsay storage ring. More than 800 pion pairs have been detected. The excitation curve has been fitted with a Breit-Wigner formula which leads to the following values: σpeak = (1.69 ± 0.21) 10-30 cm2; mρ{variant}= (770 ± 4) MeV; Γρ{variant} = (111 ± 6) MeV. The partial width of the ρ{variant}o going into e+e- thus obtained is: Γρ{variant}→e+e-=(7.36±0.7) keV. © 1969.

引用

页码：508 / +

页数：1

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