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Dark Matter and a Suppression Mechanism for Neutrino Masses in the Higgs Triplet Model

Dark Matter and a Suppression Mechanism for Neutrino Masses in the Higgs Triplet Model. Hiroaki SUGIYAMA. (Univ. of Toyama, Japan). based on ‘S. Kanemura, HS, arXiv:1202.5231 ’. Higgs Triplet Model. the SM + a complex Higgs triplet of. W. Konetschny and W. Kumer, PLB 70 , 433 (1977).

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Dark Matter and a Suppression Mechanism for Neutrino Masses in the Higgs Triplet Model

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  1. Dark Matter and a Suppression Mechanism for Neutrino Masses in the Higgs Triplet Model Hiroaki SUGIYAMA (Univ. of Toyama, Japan) based on ‘S. Kanemura, HS, arXiv:1202.5231’

  2. Higgs Triplet Model the SM + a complex Higgs triplet of W. Konetschny and W. Kumer, PLB70, 433 (1977) M. Magg and C. Wetterich, PLB94, 61 (1980) T.P. Cheng and L.F. Li, PRD22, 2860 (1980) J. Schechter and J.W.F. Valle, PRD22, 2227 (1980) Neutrino Mass Majorana mass matrix Soft breaking of Yukawa tem

  3. Motivations Small option seems charming Light new particles (ex. ) production at LHC Sizable new coupling constants (ex. ) sizable LFV We want to suppress

  4. We want to supply the dark matter to the HTM

  5. Our model Suppression of parameter Surprising model Resolve these issues at once (some relation between them) Supplying DM candidate “Idea is what resolves multiple issues at once” - Shigeru Miyamoto -

  6. Our Model S. Kanemura, HS, arXiv:1202.5231 HTM Only scalar sector is extended. SM broken by Suppression of parameter : allowed by conservation at the tree level : forbidden : at the loop level

  7. Singlet Majoron Interaction to Matter Y. Chikashige, R.N. Mohapatra, and R.D. Peccei., PLB98, 265 (1981) c.f. Constraint from cooling of white dwarfs :

  8. Our Model HTM Only scalar sector is extended. SM odd particles isDM candidate

  9. 1-loop generation of parameter by utilizing DM candidate -odd particles (Dark mattercandidates) contribute to the loop Moyashimon “A. oryzae diagram”

  10. Estimation of Suppression of Case of (inert doublet DM) DM Example: satisfy LEP-II and WMAP E. Lundstrom et al., PRD79, 035013 (2009) Case of (inert singlet DM) Example:

  11. Summary The Higgs Triplet Model is extended. Dark mattercandidate (composed of and ) one-loop “one-loop” A strong suppression of parameter is possible. For example, suppressed

  12. Backup

  13. Higgs Triplet Model Yukawa interaction with a complex Higgs triplet Higgs potential

  14. Scalar Potential in Our Model

  15. Masses of -Odd Scalars

  16. Masses of -Even Scalars

  17. Vacuum Expectation Values

  18. Constraint on Inert Doublet Scalar DM E. Lundstrom et al., PRD79, 035013 (2009)

  19. Hopeful Probe of at the LHC : : The most interesting decay because of Good for BG reduction by imposing Negligible No No (See also, S. Kanemura and K. Yagyu, PRD85, 115009 )

  20. Hopeful Probe of at the LHC : with Negligible contribution from Negligible For example,

  21. Hopeful Probe of at the LHC : c.f. usual HTM for the case of Additional leptons likely to exist.

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