2010/04/30 by Ahmed Rashed, Murugeswaran Duraisamy, Alakabha Datta
Physics and Astronomy · #Artificial intelligence #Atomic and Subatomic Physics Research #Computer science #Dark Matter and Cosmic Phenomena #Physics #Quantum optics and atomic interactions #Support vector machine #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.82.054031
published as Phys.Rev.D82:054031,2010 · 14 pages, 6 figures. Version accepted for publication in PRD
arxiv created 2010/08/27 · openalex publication_date 2010/09/27 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper, we explore the decay \ensuremathηb\ensuremath→\ensuremathτ+\ensuremathτ^\ensuremath- as a probe for a light pseudoscalar or a light axial vector state. We estimate the standard model branching ratio for this decay to be \ensuremath∼4\ifmmode×\else\texttimes\fi10^\ensuremath-9. We show that considerably larger branching ratios, up to the present experimental limit of \ensuremath∼8%, are possible in models with a light pseudoscalar or a light axial vector state. As we do not include possible mixing effects between the light pseudoscalar and the \ensuremathηb, our results should be reliable when the pseudoscalar mass is away from the \ensuremathηb mass.