Scalar dark matterin heavy quark sector
Peiwen Wu (‫ ޓ‬ङ෈)
Korea Institute for Advanced Study (KIAS)
Collaboration withPyungwon Ko (KIAS), Seungwon Baek (KIAS & Korea U.)
1606.00072 [JHEP10(2016)117]
1709.00697 [JCAP07(2018)008]“Beyond the BSM”
(The 4th Kavli IPMU-Durham IPPP-KEK-KIAS workshop)
Gumma, Japan, Oct 3rd, 20181

Outline• DM hints and detections• Vector-like portal for DM-SM interaction• SM sector: !" , $" , %" as our choice• Phenomenology• Summary2DM hints and detections

https://en.wikipedia.org3

(DM)-(SM)-(Med.) Interaction

1501.02202, Kilic, Klimek, Yu.
Signatures of Top Flavored Dark Matter• Simplified model• Renormalizable• Gauge invariant

1511.04452, Giacchino et al,
Signatures from scalar dark matterwith a vector-like quark mediator
1308.0612, Bai, Berger.
Fermion portal dark matter

1606.00072, Baek, Ko, PW
Top-philic Scalar Dark Matter with a
Vector-like Fermionic Top Partner

1404.1918, Gomez et al,
Dark Matter on Top

1402.7358, Chang et al,
Leptophilic effective WIMPs
1411.1407, Kile, Kobach, Soni,Lepton-Flavored Dark Matter

1612.01643, Abe et al,
Dark matter physics, flavor physics
and LHC constraints in the darkmatter model with a bottom
4partnerOur focus: Heavy quarks

1606.00072, Baek, Ko, PW
Top-philic Scalar Dark Matter with a
Vector-like Fermionic Top Partner
1501.02202, Kilic, Klimek, Yu.
Signatures of Top Flavored Dark Matter
1404.1918, Gomez et al,
Dark Matter on Top

1st gen. is strongly constrained

1511.04452, Giacchino et al,
Signatures from scalar dark matterwith a vector-like quark mediator
1308.0612, Bai, Berger.
Fermion portal dark matter

1402.7358, Chang et al,
Leptophilic effective WIMPs
1411.1407, Kile, Kobach, Soni,
Lepton-Flavored Dark Matter

1612.01643, Abe et al,
Dark matter physics, flavor physics
and LHC constraints in the darkmatter model with a bottom
5partnerModel set-up• DM: real scalar !
• Vector-like (VL) fermion ", #$ > #&{9: , 9- , 9; }• (", )* ) same quantum number• no chiral anomaly• ,- parity: !, " are odd• no mixing !, . , (", )* )(∗)• /0 " → !)*= 100%

• free from LHC limits on VL (7, /)We consider 9- , 9; ≫ 9: , Heavy quark-philic

6Model set-up• DM: real scalar !
• Vector-like (VL) fermion ", #$ > #&Buchkremera et al, 13’
Model Independent Framework
for Searches of Top Partners{9: , 9- , 9; }• (", )* ) same quantum number• no chiral anomaly• ,- parity: !, " are odd• no mixing !, . , (", )* )(∗)• /0 " → !)*= 100%

• free from LHC limits on VL (7, /)We consider 9- , 9; ≫ 9: , Heavy quark-philic

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DM Annihilations: Thermal Relic, Indirect Detection
see Y-F Zhou’s talkfor charged CRFermi Dwarf
1503.02641

Giacchino et al, 15’

Nojiri et al, 93’; Hisano et al, 10’; Colucci et al, 18’

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Top FCNC, exp. limit < 10$(&~()

courtesy to Taejeong Kim
9Collider signals (ATLAS 36 !"#$ @ 13 TeV)
• %% → ''( → )) + +/- + +/-,
i.e.
./0122 + ++,̅ 55, +51808.07488, Chakraborty et al,• ~ SUSY squark searches (3rd , 1st & 2nd gen.)
Flavour-violating decays of mixed
top-charm squarks at the LHC

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DM-nucleon scattering• Corrections to H.P. from VL portal• heavy particles {!, #, ℎ} are integrated out at %&• Down to ~ 1 GeV, RGE & {c,b} thrsh. effects included

11Interplay: VLP & H.P.

+ inverse loop rotations

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Interplay: VLP & H.P.
1709.00697
Baek, Ko, PW

Ω,- ℎ# (VLP + HP)
678 ℎ# (VLP)

XENON1T limits on !",#,$!$ (H.P. = 0)10
1.00.11606.00072
Baek, Ko, PW!$ = 0.5, !# = 0!# RGE-OffRGE-On!"!$ (H.P.= % )"()&'Below line : allowed
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Combined results (color regions: excluded)!" = 0.5'( = ). */ + 66(23-4)+
̅̅++ 23-4)/ + --(1ℓIDDD
jets+MET
1lep+jets+MET
Xenon-1T
Dwarf
Thermal relic14

!" = 0.5'( = ). *m801 ~
2

m801 ~
201 ~500 GeV

01 ~500 GeV

D?@ABCB+66+,
jets+MET
1lep+jets+MET
Xenon-1T
Dwarf
Thermal relic+-, +/10;<10;=>15

!" = 0.5'( = ). *m801 ~2m801 ~201 ~500 GeV

01 ~500 GeV

D?@ABCB+66+,jets+MET
1lep+jets+MET
Xenon-1T
Dwarf
Thermal relic+-, +/10;<10;=>16

!" = 0.5'( = ). *12 ~1412 ~14Generally, thermal 12 < 14in tension with XENON-1T+00+,jets+MET
1lep+jets+MET
Xenon-1T
Dwarf
Thermal relic+-, +/

10678

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Summary• We studied a real scalar DM !, coup. to {"# , %# } via a vector-like fermion &.
• charm sector dominates in direct detection*+• for '( < , ,-, = 1 (3) excludes '3 < 400 (1000) GeV• for -,,6~8 1 , thermal '( < '9 in tension with XENON-1T• loop correction to H.P. :(; from VL portal• -6 can adjust H.P. strength• top FCNC Brs ~ 10<= , below current limits ~10<(>~?)• future top measurements are valuable18

Thank you for your attention

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Back up20

Other scenarios!" ≫ !$, !&: light quark-philic
Giacchino et al, 1511.04452!& ≫ !", !$: top-philic
Colucci et al, 1804.05068

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