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

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

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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’

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

Small option seems charming

Light new particles (ex. )

production at LHC

Sizable new coupling constants (ex. )

sizable LFV

We want to suppress

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 -

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

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 :

1-loop generation of parameter by utilizing DM candidate

-odd particles

(Dark mattercandidates)

contribute to the loop

Moyashimon

“A. oryzae diagram”

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:

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

Constraint on Inert Doublet Scalar DM

E. Lundstrom et al., PRD79, 035013 (2009)

: The most interesting decay

because of

Good for BG reduction by imposing

Negligible

No

No

(See also, S. Kanemura and K. Yagyu, PRD85, 115009 )

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