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

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

2001-01-26

arxiv.org/abs/hep-ph/0101298v2

J.Phys.G27:L29,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures, 2 tables

Scientific paper

10.1088/0954-3899/27/4/102

Two dedicated experiments on internal pair conversion (IPC) of isoscalar M1 transitions were carried out in order to test a 9 MeV/c2 X-boson scenario. In the 7Li(p,e+e-)8Be 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 11B(d,n e+e-)12C reaction at 1.6 MeV, leading to the 12.71 MeV 1+ level with pure T=0 character, an anomaly was observed at 9 MeV/c2. The compatibility of the results with the scenario is discussed.

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