SEARCH FOR THE TETRANEUTRON BY THE DOUBLE-CHARGE-EXCHANGE OF NEGATIVE PIONS

被引：40
作者：
UNGAR, JE
MCKEOWN, RD
GEESAMAN, DF
HOLT, RJ
SPECHT, JR
STEPHENSON, KE
ZEIDMAN, B
MORRIS, CL
机构：
[1] ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439
[2] UNIV CALIF LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
来源：
PHYSICS LETTERS B | 1984年 / 144卷 / 5-6期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0370-2693(84)91272-3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The momentum spectrum for double-charge-exchange of π- on 4He has been measured at 0° and Tπ = 165 MeV. A 1σ upper limit of 22 nb/sr is set on the cross section for transitions leading to bound tetraneutrons. The cross section in the continuum region is shown to be inconsistent with a four-neutron phase space distribution, while a model including final state interaction effects gives better agreement with experiment. © 1984.
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页码：333 / 336
页数：4
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