Further search for a neutral boson with a mass around 9 MeV/c2

被引：21

作者：

de Boer, FWN ^{[1
]}

Bethge, K

Bokemeyer, H

van Dantzig, R

van Klinken, J

Mironov, V

Müller, KA

Stiebing, KE

机构：

[1] Natl Inst Kernfys, NL-1098 SJ Amsterdam, Netherlands

[2] Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[3] Gesellsch Schwerionenfors, D-64291 Darmstadt, Germany

[4] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands

[5] Lab Part Phys, Dubna Joint Nucl Res Inst, Moscow 14198, Russia

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2001年 / 27卷 / 04期

关键词：

D O I：

10.1088/0954-3899/27/4/102

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Two dedicated experiments on internal pair conversion (LPC) of isoscalar M1 transitions were carried out in order to test a 9 MeV/c(2) X-boson scenario. In the Li-7(p, e(+)e(-))Be-8 reaction at 1.1 MeV proton energy to the predominantly T = 0 level at 18.15 MeV, a significant deviation from IPC was observed at large pair correlation angles. In the B-11(d, ne(+)e(-))C-12 reaction at 1.6 MeV, leading to the 12.71 MeV 1(+) level with pure T = 0 character, an anomaly was observed at similar to9 MeV/c(2). The compatibility of the results with the scenario is discussed.

引用

页码：L29 / L40

页数：12

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