Upper limit for J/psi &rarrgamma(invisible)
by Hu, Daowen, Ph.D., RENSSELAER POLYTECHNIC INSTITUTE, 2009, 152 pages; 3385647

Abstract:

The CLEO-c ψ(2S) data were used to study the branching fraction for J/ψ radiative decay to weakly interacting neutral final state particles. The measured 90% confidence level upper limit for invisible decay is 3.65×10-6. This result provides a strong constraint for dark-matter models that require light neutralinos to annihilate through a light boson. Data were acquired with the CLEO-c detector at the CESR e+e - symmetric collider.

 
AdviserGary S. Adams
SchoolRENSSELAER POLYTECHNIC INSTITUTE
SourceDAI/B 70-12, p. , Jan 2010
Source TypeDissertation
SubjectsParticle physics
Publication Number3385647
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