Probing Majorana phases and the neutrino mass spectrum in the Higgs triplet model at the CERN LHC

2007/12/31 by A. G. Akeroyd, Mayumi Aoki, Hiroaki Sugiyama · 2 citations
Physics and Astronomy · #Branching fraction #Dark Matter and Cosmic Phenomena #Higgs boson #Large Hadron Collider #MAJORANA #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #hep-ph

paper · pdf · doi:10.1103/physrevd.77.075010

published as Phys.Rev.D77:075010,2008 · 1+19 pages, 22 figures, typos corrected, references added, version to appear in Phys. Rev. D

arxiv created 2008/03/25 · openalex publication_date 2008/04/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Doubly charged Higgs bosons (H^\ifmmode±\else\textpm\fi\ifmmode±\else\textpm\fi) are a distinctive signature of the Higgs triplet model of neutrino mass generation. If H^\ifmmode±\else\textpm\fi\ifmmode±\else\textpm\fi is relatively light (m_H^\ifmmode±\else\textpm\fi\ifmmode±\else\textpm\fi<400 GeV), it will be produced copiously at the LHC, which could enable precise measurements of the branching ratios of the decay channels H^\ifmmode±\else\textpm\fi\ifmmode±\else\textpm\fi\ensuremath→l_i^\ifmmode±\else\textpm\fil_j^\ifmmode±\else\textpm\fi. Such branching ratios are determined solely by the neutrino mass matrix which allows the model to be tested at the LHC. We quantify the dependence of the leptonic branching ratios on the absolute neutrino mass and Majorana phases, and present the permitted values for the channels e^\ifmmode±\else\textpm\fie^\ifmmode±\else\textpm\fi, e^\ifmmode±\else\textpm\fi\ensuremathμ^\ifmmode±\else\textpm\fi, and \ensuremathμ^\ifmmode±\else\textpm\fi\ensuremathμ^\ifmmode±\else\textpm\fi. It is shown that precise measurements of these three branching ratios are sufficient to extract information on the neutrino mass spectrum and probe the presence of CP violation from Majorana phases.

Citations

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Cited by

• Inverse neutrinoless double beta decay revisited: Neutrinos, Higgs triplets, and a muon collider
• Relating neutrino masses to dilepton modes of doubly charged scalars