STUDY OF THE REACTION E+E- -]PPBAR IN THE TOTAL ENERGY-RANGE 1925-2180 MEV

被引：103

作者：

DELCOURT, B

DERADO, I

BERTRAND, JL

BISELLO, D

BIZOT, JC

BUON, J

CORDIER, A

ESCHSTRUTH, P

FAYARD, L

JEANJEAN, J

JEANJEAN, M

MANE, F

PARVAN, JC

RIBES, M

RUMPF, F

机构：

[1] Laboratoire de l'Accélérateur Linéaire

来源：

PHYSICS LETTERS B | 1979年 / 86卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(79)90864-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The e+e- → pp cross section has been measured between 1925 and 2180 MeV. About 50 pp events were detected. The total cross section decreases from 1.31 ± 0.4 nb near 1937 MeV to 0.55 ± 0.2 nb near 2135 MeV. The proton form factors |GE|2 and |GM|2, assumed identical, decrease from 0.15 ± 0.05 to 0.043 ± 0.015. They are an order of magnitude higher than predicted by the well-known dipole fit. The energy range has been scanned in steps of about 2 MeV. No significant structure was found in this pp sample. © 1979.

引用

页码：395 / 398

页数：4