Enhanced Bd0 → µ+µ- Decay: What if?
Department of Physics, National Taiwan University, Taipei, Taiwan 10617
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If the very rare Bd0 → µ+µ- decay is enhanced to (3–4)×10−10 level or higher, it can be discovered with existing 2011-2012 LHC data. It might then cast some doubt on the Higgs boson nature of the 126 GeV boson, since the likely explanation would be due to the fourth generation t' quark. There is a mild motivation from the known tension in sin 2β/ϕ1. If discovery is made before the 13 TeV run, then the b → d quadrangle (modulo mt' would suddenly fall into our lap. Continued pursuit in future runs can probe below 3×10−10.
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