Dark Vector-Gauge-Boson An SU(3)C×SU(2)L×U(1)Y ×SU(2)N Model

Daniel Wegman. PASI 2012, Buenos Aires, Argentina

We propose Dark Matter as a vector Boson instead of the usual assumtion

of fermion or scalar.

arXiv:1107.2093 with Subhaditya Bhattacharya, J. Lorenzo Diaz-Cruz, Ernest Ma

PRD: Accepted Friday Feb 17, 2012

Dark vector in other models

1)In a theory of universal compact extra dimensions, the first Kaluza-Klein excitation of the standard-model U(1) gauge boson B. http://arxiv.org/pdf/hep--ph/0206071.pdf

2)The T−odd counterpart of B in little Higgs models is another candidate. http://arxiv.org/pdf/hep-ph/0411264.pdf 3)Non-Abelian vector bosons from a hidden sector may also be considered. http://arxiv.org/pdf/0907.1007.pdf

Dark vector in other models

1)In a theory of universal compact extra dimensions, the first Kaluza-Klein excitation of the standard-model U(1) gauge boson B. http://arxiv.org/pdf/hep--ph/0206071.pdf

2)The T−odd counterpart of B in little Higgs models is another candidate. http://arxiv.org/pdf/hep-ph/0411264.pdf 3)Non-Abelian vector bosons from a hidden sector may also be considered. http://arxiv.org/pdf/0907.1007.pdf

Our model involves less “exotic” physics.

[SU(3)]3 SU(3)xSU(2)xSU(2)xU(1)

[SU(3)]3 SU(3)xSU(2)xSU(2)xU(1)

[SU(3)]3 SU(3)xSU(2)xSU(2)xU(1)

Some remarks

● An extra global U(1) symmetry S is imposed, so that (−1)L , where L = S + T

3N is conserved.

● R parity given by R ≡ (−1)3B+L+2j,, will be used, even if this is not a SUSY model.

● SU(2)N vector gauge bosons are neutral and

can be DM.

Relic abundance

Relic abundance

WMAP

Direct Detection

Where,

Direct Detection

Where,

CDMS

Allowed masses

mh > mX2 > mE,N > mX1

1)h → X1 d

2)h → X2 d

i)E+ → X

1 l +

ii)E- → X

1 l -

iii)N → X

1 ν

iv)N → X

1 ν

a)X2 → E+ l -

b)X2 → E- l +

c)X2 → N ν

d)X2 → N ν

mh > mX2 > mE,N > mX1

1)h → X1 d

2)h → X2 d

i)E+ → X

1 l +

ii)E- → X

1 l -

iii)N → X

1 ν

iv)N → X

1 ν

a)X2 → E+ l -

b)X2 → E- l +

c)X2 → N ν

d)X2 → N ν

Cascades: pp→ hX

1 → d X

1X

1

pp→ hX1 → d X

1X

2→ d X

1 E+ l -→ d X

1 X

1 l + l -

pp→ hh → dd X1X

1

pp→ hh → dd X1X

2→ dd X

1E+l - → dd X

1X

1l + l -

LHC example signatures

pp → hX1

pp → h h

Conclusion and further research

● We identified a vector boson as a dark-matter candidate. Using constrains for relic abundance the SU(2)

N breaking

scale was found to be about 1 TeV.

Conclusion and further research

● We identified a vector boson as a dark-matter candidate. Using constrains for relic abundance the SU(2)

N breaking

scale was found to be about 1 TeV.

● For a scenario of the model at LHC with Ecm

= 14 TeV and 10 fb−1 , 16 events are found for dimuon + jet + missing energy (against negligible background).

Conclusion and further research

● We identified a vector boson as a dark-matter candidate. Using constrains for relic abundance the SU(2)

N breaking

scale was found to be about 1 TeV.

● For a scenario of the model at LHC with Ecm

= 14 TeV and 10 fb−1 , 16 events are found for dimuon + jet + missing energy (against negligible background).

● Vector boson induced neutrino mass with only one loop. http://arxiv.org/pdf/1202.3098v1.pdf