Download - Issues in hidden sector dark matter
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Baek, Seungwon
Issues in hidden sector dark matter
Seungwon Baek (KIAS)Summer Institute 2013
Jirisan National Park, Aug. 17-23, 2013
based on JHEP1202; JHEP1211; JHEP1305 in collaboration with Pyungwon Ko, Wan-Il Park, Eibun Senaha
2013-08-18
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Baek, Seungwon
Outline
2013-08-18
Hidden sector dark matter with Higgs portal interaction Relic density and direct detection Higgs phenomenology EW precision test Vacuum stability, perturbativity, unitarity bound LHC searches
Conclusions
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Baek, Seungwon
Dark Matter
2013-08-18
27% of the universe is DM We do not know the na-ture of DM
WIMP allows the parti-cle physics explanation of DM and its creation and detection at LHC
One possible WIMP DM scenario is the frame-work of “Hidden Sec-tor” DM
Dark Matter;
26.8
Ordinary Matter;
4.9
Dark Energy;
68.3
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Baek, Seungwon
Hidden Sector DM and Higgs Portal
2013-08-18
DM is singlet under the SM gauge group hidden
Higgs and a singlet scalar can mediate be-tween the SM and hidden sector through renormalizable interaction
SM HS(DM)
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Baek, Seungwon
Other portals
2013-08-18
-portal Babu, Kolda, March-Russel, hep-ph/9710441
-portal Adam Falkowski , Joshua T. Ruderman , Tomer Volansky, arXiv:1101.4936
fermion-portal Yang Bai, Joshua Berger, arXiv:1308.0612
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Baek, Seungwon
Hidden sector DM models with Higgs por-tal
2013-08-18
Singlet Fermionic DM
Vector DM
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Baek, Seungwon
Direct detection
2013-08-18
XENON100(2012)
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Baek, Seungwon
Direct detection
2013-08-18
GIM-type cancellation occurs in direct detection cross section
0 for degenerate Higgs
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Baek, Seungwon
Direct detection
2013-08-18
Exclusion plot by XENON100
gx: DM- coupling Cancellation mecha-
nism works quite ef -ficiently and larger region is allowed by direct detection ex-periments
SB, P. Ko, W.I. Park(2011)
𝑀 𝑋=70𝐺𝑒𝑉
𝑚2=150𝐺𝑒𝑉
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Baek, Seungwon
Comparison with the EFT approach
2013-08-18
SB, P. Ko, W-I. Park, E. Senaha, JHEP(2013)
𝑟1<0.7
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Baek, Seungwon
Higgs Phenomenology
2013-08-18
Higgs sector is extendedHiggs phenomenol-ogy is different from the SM one
SM HS(DM)
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Baek, Seungwon
Higgs Phenomenology
2013-08-18
Invisible decay of Higgs at tree is allowed
Reduction of Higgs signal strength
Hi
X
X
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Baek, Seungwon
Higgs Phenomenology
2013-08-18
Signal strength
If some , our scenario will be excluded
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Baek, Seungwon
EW precision tests
2013-08-18
New contribution to the EW precision obs. Barger, et.al. 2008
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Baek, Seungwon
EW precision tests
2013-08-18
𝛼=20°
𝛼=45°
𝑚2=25𝐺𝑒𝑉
𝑚2=750𝐺𝑒𝑉 𝑚𝐻=720𝐺𝑒𝑉
SB, P. Ko, W-I. Park, E. Senaha, JHEP(2013)
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Baek, Seungwon
Vacuum stability (EW)
2013-08-18
Requiring the global min. of the Higgs poten-tial is at the EW vacuua constrains the param-eters of the Higgs portal
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Baek, Seungwon 2013-08-18
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Baek, Seungwon
Triviality and vacuum stability bound on mH
2013-08-18
The Higgs potential may become unstable before Mpl.
125GeV
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Baek, Seungwon 2013-08-18
Higgs portal model can provide negative con-tribution to the SM-like Higgs.
Lebedev 2012, Joan Elias-Miro, Jose R. Espinosa, Gian F. Giu-dice, Hyun Min Lee, Alessandro Strumia, 2012
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Baek, Seungwon
Triviality and vacuum stability bound
2013-08-18
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Baek, Seungwon
Unitarity bound
2013-08-18
Sin Kyu Kang, Jubin Park, arXiv:1306.6713
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Baek, Seungwon
LHC tests
2013-08-18
𝑟1<0.7
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Baek, Seungwon
LHC tests
2013-08-18
𝑟1>0.7
It will be difficult to produce the 2nd Higgs at the LHC.
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Baek, Seungwon
Conclusions
2013-08-18
DM with Higgs portal provides cancellation to the direct search bound improves the stability of Higgs potential changes the Higgs search at colliders is constrained by EWPT and the discovery of SM-
Higgs boson It will be difficult to produce the 2nd Higgs.
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Baek, Seungwon
Backups
2013-08-18
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Physics of Higgs Portal DM
2013-08-18Baek, Seungwon
Dark matter relic density, direct & indirect detection scalar: C.P. Burgess, Maxim Pospelov, Tonnis ter Veldhuis, hep-ph/0011335 fermion:Yeong Gyun Kim, Kang Young Lee, Seodong Shin, arXiv:0809.2745 vector: Yasaman Farzan, Amin Rezaei Akbarieh, arXiv:1207.4272 Collider phenomenology SB, P. Ko, W-I. Park, E. Senaha, 1112.1847, 1209.4163, 1212.2131 EW precision tests Vacuum stability Perturbativity Unitarity
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Comparison with the EFT approach
2013-08-18Baek, Seungwon
For heavy EFT is a good approximation.S. Kanemura et.al 2010, A. Djouadi, et.al. 2011, O. Lebedev, H. M. Lee, Y. Mambrini, 2011, L. Lopez-Hororez, Schwetz, Zupan 2012
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Comparison with the EFT approach
2013-08-18Baek, Seungwon
SFDM scenario is ruled out in the EFT
A. Djouadi, et.al. 2011
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Baek, Seungwon
EW precision tests
2013-08-18
The S,T,U parameters give strong constraints on the mixing angle α