Prospects of Higgs portal DM models at future colliders Jinmian Li Korea Institute for Advanced Study Based on B. Dutta, T. Kamon, P. Ko, JL, arXiv: 1705.02149, 1712.05123 Jul. 6th, 2018 XXXIX International conference on High Energy Physics COEX, Seoul Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 1 / 21
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Korea Institute for Advanced Studypeople.physics.tamu.edu/kamon/research/talk/2018/180704_ICHEP2… · 1 Status of LHC searches for Higgs portal DM models 2 Prospects of searches
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Prospects of Higgs portal DM models at futurecolliders
Jinmian Li
Korea Institute for Advanced Study
Based on B. Dutta, T. Kamon, P. Ko, JL, arXiv: 1705.02149, 1712.05123
Jul. 6th, 2018
XXXIX International conference on High Energy Physics
COEX, Seoul
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 1 / 21
Outline
1 Status of LHC searches for Higgs portal DM models
2 Prospects of searches at future colliders500 GeV ILC100 TeV FCC-pp/SppC
3 Conclusion
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 2 / 21
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 19 / 21
Spin characterization (EmissT and cos(θ``))
Two dimensional binned log-likelihood test: L(data|Hα) =∏i,j
tnijij e−tij
nij !
σsys. = 0.5%
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 20 / 21
Conclusion
The gauge invariant Higgs portal DM models for FDM and VDMrequire at least two mediators, while that of SDM only need one.
At the ILC, mH2 . 300 GeV can be probed at more than 3-σ level.
At the 100 TeV p-p collider, discovery/exclusion can be made withan integrated luminosity less than 1 ab−1 given a 1% systematicuncertainty, while the spin discrimination require integratedluminosity of a few O(10) ab−1 given a 0.5% systematicuncertainty.
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 21 / 21
Backup.
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 21 / 21
Benchmark points
The relevant parameters in FDM for collider search:gχ = 3, sinα = 0.3, mχ = 80 GeV and mH2
where f is the SM fermion, V = Z,W and δV = 1(2) for Z(W±).
Parameters for the vector DM production are chosen accordingly:sinα = 0.3, mV = 80 GeV and gV is chosen such that the total decaywidth of H2 is the same as benchmark points of FDM.
Fix mS = 80 GeV and take appropriate λHS such that the productioncross section of the signal process is the same with that in the FDM.
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 21 / 21
Discovery prospects of the hadronic channel
Kinematic distributions:
(j1) [GeV]T
p0 50 100 150 200 250
Eve
nt F
ract
ion
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
0.05
SM
SDM
VDMs
FDM200
FDM300
FDM400
FDM500
(Z) [GeV]T
p0 50 100 150 200 250
Eve
nt F
ract
ion
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
0.05
SM
SDM
VDMs
FDM200
FDM300
FDM400
FDM500
[GeV]missTE
0 50 100 150 200 250
Eve
nt F
ract
ion
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
0.05SM
SDM
VDMs
FDM200
FDM300
FDM400
FDM500
minφ ∆0 0.5 1 1.5 2 2.5 3
Eve
nt F
ract
ion
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
SM
SDM
VDMs
FDM200
FDM300
FDM400
FDM500
∆φmin
= mini=1,2
∆φ(pmissT , p(ji))
Jinmian Li (KIAS) Higgs portal DMs at colliders ICHEP2018 21 / 21
Spin characterization
The same preselection and BDT cuts as used for FDM the benchmark pointFDM200 (FDM300) are applied to the corresponding benchmark point SDM200(SDM300) and VDM200 (VDM300).