Dark Matter @ Colliders David-fest 2011 Roni Harnik, Fermilab Bai, - - PowerPoint PPT Presentation

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Dark Matter @ Colliders David-fest 2011 Roni Harnik, Fermilab Bai, - - PowerPoint PPT Presentation

Dec 29, 2023 258 likes •1.1k views

Dark Matter @ Colliders David-fest 2011 Roni Harnik, Fermilab Bai, Fox, RH - 1005.3797 Fox, RH, Kopp, Tsai -1103.0240 Fox, RH, Kopp, Tsai - 1109.4389 Very related work by the Irvine Clan: Goodman, Ibe, Rajaraman, Shepherd, Tait and

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SLIDE 1

Roni Harnik, Fermilab

Bai, Fox, RH - 1005.3797 Fox, RH, Kopp, Tsai -1103.0240 Fox, RH, Kopp, Tsai - 1109.4389

Very related work by the “Irvine Clan”:

Goodman, Ibe, Rajaraman, Shepherd, Tait and Haibo Yu -1005.1286 Goodman, Ibe, Rajaraman, Shepherd, Tait and Haibo Yu - 1008.1783 Fortin and Tait - 1103.3289 Rajaraman, Shepherd,Tait and Wijangco - 1108.1196 Shepherd and Goodman - 1111.2359

Dark Matter @ Colliders

David-fest 2011

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SLIDE 2

Dark Matter needs no introduction.

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SLIDE 3

Does it fit into a larger framework? What is the particle mediating this interaction?

But it has a lot to answer for:

What sets its abundance? Does it interact with matter apart from gravity? How strong/weak are these interactions?

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SLIDE 4

Does it fit into a larger framework? What is the particle mediating this interaction?

But it has a lot to answer for:

What sets its abundance? Does it interact with matter apart from gravity? How strong/weak are these interactions? Answers (and limits) come from direct & indirect searches.

Directly complemented by past and present colliders.

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SLIDE 5

Does it fit into a larger framework? What is the particle mediating this interaction?

But it has a lot to answer for:

What sets its abundance? Does it interact with matter apart from gravity? How strong/weak are these interactions?

LHC (e.g. Higgs mediated interactions)

Answers (and limits) come from direct & indirect searches.

Directly complemented by past and present colliders.

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SLIDE 6

Outline

Motivation: Colliders as direct detection experiments. Tevatron & LHC mono-jets:

Rough estimates. Operators Results

LEP mono-photons. Scattering via the Higgs & LHC Higgs searches. Coffee.

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SLIDE 7

The WIMP Hint

Does DM have interactions with matter? If we throw a weakly interacting particle with weak scale mass into the primordial hot soup, , the DM abundance comes out roughly right. DM DM SM SM Hint: There is an interaction. Leads to pb-ish cross sections

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SLIDE 8

We hope to probe dark matter in several ways:

Probes of DM Interactions

q DM DM q

direct

DM-nucleus scattering q ¯ q DM DM

indirect

DM annihilation

Focus on direct detection in this talk.

(a similar game can be played for indirect)

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SLIDE 9

Direct detection

Direct detection places limits on . Heroic effort with remarkable results. DD has some weaknesses.

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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q DM DM q

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SLIDE 10

Direct detection

Direct detection places limits on . Heroic effort with remarkable results. DD has some weaknesses.

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q DM DM q

low mass

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SLIDE 11

Direct detection

Direct detection places limits on . Heroic effort with remarkable results. DD has some weaknesses.

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

q DM DM q

low mass spin dependent

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SLIDE 12

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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SLIDE 13

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.
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SLIDE 14

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

XENON100

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SLIDE 15

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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tri-leptons+ jets + MET

XENON100

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SLIDE 16

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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jets + MET tri-leptons+ jets + MET

XENON100

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SLIDE 17

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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jets + MET

{

same-sign di-leptons +MET tri-leptons+ jets + MET

XENON100

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SLIDE 18

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
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jets + MET

{

same-sign di-leptons +MET tri-leptons+ jets + MET

“XENON100 is starting to probe the MSSM’s pseudopod, LHC killed the Membrane, but the ectoplasm is still safe.” [submitted to nature]

XENON100

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SLIDE 19

In order to get a particular DM-nucleon cross section, , we assume the existence of a DM-hadron interaction, .

A Simple Point

q DM DM q

q ¯ q DM DM

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The same interaction can lead to DM production at a hadron machine.

p¯ p → nothing

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SLIDE 20

In order to get a particular DM-nucleon cross section, , we assume the existence of a DM-hadron interaction, .

A Simple Point

q DM DM q

q ¯ q DM DM

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The same interaction can lead to DM production at a hadron machine.

p¯ p → nothing

j + ET

/

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SLIDE 21

A Simple Point

Mono-jet searches can place limits on the direct detection plane.

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These are conservative limits. In a specific model there may be other ways to produce DM, e.g. through cascades from heavy colored states.

But mono-jet are certainly good to set bounds.

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SLIDE 22

A Simple Point

Mono-jet searches can place limits on the plane.

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The collider does not have a low energy threshold

The collider does not pay a price for spin dependence

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SLIDE 23

Cross Sections

The direct detection cross section ( ): Mono-jet + ( ):

χ q χ q

σDD ∼ g2

χ g2 q

µ2 M4 ,

µ = mχmN mN + mχ

q χ ¯ q χ

σ1j ∼      αs g2

χ g2 q 1 p2

T

M 100 GeV αs g2

χ g2 q p2

T

M4

M 100 GeV

ET

/

q ∼ 100 MeV

q ∼ 10 − 100 GeV

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SLIDE 24

Back of an Envelope:

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SLIDE 25

Back of an Envelope:

Consider a heavy mediator:

assume (just a contact operator)

pT < M

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SLIDE 26

Back of an Envelope:

σ1j ∼ αsg2

χg2 q

p2

T

M 4

(pT ∼ 100 GeV)

Consider a heavy mediator:

assume (just a contact operator)

pT < M

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SLIDE 27

Back of an Envelope:

σDD ∼ g2

χ g2 q

µ2 M4 ,

(µ ∼ 1 GeV)

σ1j ∼ αsg2

χg2 q

p2

T

M 4

(pT ∼ 100 GeV)

Consider a heavy mediator:

assume (just a contact operator)

pT < M

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SLIDE 28

Back of an Envelope:

σDD ∼ g2

χ g2 q

µ2 M4 ,

(µ ∼ 1 GeV)

σ1j ∼ αsg2

χg2 q

p2

T

M 4

(pT ∼ 100 GeV)

σ1j σDD ∼ O(1000)

Consider a heavy mediator:

assume (just a contact operator)

pT < M

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SLIDE 29

Front of an Envelope:

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SLIDE 30

In 1 fb-1 CDF saw 8449 mono-jet events, expected 8663 332

± ⇒ σ1j < ∼ 500 fb σDD < ∼ 0.5 fb = 5 × 10−40cm2

Front of an Envelope:

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SLIDE 31

The Limit

Estimated limits from a back of the envelope recasting an old CDF study: Sets best limit below ~5GeV.

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Best limit dependent DM detector.

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SLIDE 32

CDF Limits:

CDF did a dedicated shape analysis of monojet spectra.

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SLIDE 33

A Search For Dark Matter in the Monojet + Missing Transverse Energy Signature in 6.7 fb−1

S.Z. Shalhout1, T. Schwarz2, R. Erbacher1, J. Conway1, P. Fox2, R. Harnik2, Y. Bai2 UC Davis1 Fermilab2

A neural net with our name on it ?! :-0

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SLIDE 34

How is the translation from Colliders done? What can LHC say? What did LEP say? What assumptions are made?

In the rest of the talk:

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SLIDE 35

Operators

Describe DM interactions as higher DM operators (possibly mediated by light mediators)

SI, vector exchange SD, axial-vector exchange SI (or SD), t-channel

OV = (¯ χγµχ)(¯ qγµq) Λ2 , OA = (¯ χγµγ5χ)(¯ qγµγ5q) Λ2 , Ot = (¯ χPRq)(¯ qPLχ) Λ2 + (L ↔ R) , Og = αs (¯ χχ) (Ga

µνGaµν)

Λ3 .

SI gluon operator

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SLIDE 36

Which Cuts?

ATLAS’s 1fb analysis employs 3 sets of cuts

LowPT Selection requires / ET > 120 GeV, one jet with pT (j1) > 120 GeV, |η(j1)| < 2, and events are vetoed if they contain a second jet with pT (j2) > 30 GeV and |η(j2)| < 4.5. HighPT Selection requires / ET > 220 GeV, one jet with pT (j1) > 250 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV or ∆φ(j2, / ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV. veryHighPT Selection requires / ET > 300 GeV, one jet with pT (j1) > 350 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV

  • r ∆φ(j2, /

ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV.

Which has most sensitivity?

ATLAS LowPT ATLAS HighPT ATLAS veryHighPT 1.0 fb−1 1.0 fb−1 1.0 fb−1 Expected 15100 ± 700 1010 ± 75 193 ± 25 Observed 15740 965 167

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SLIDE 37

Which Cuts?

ATLAS’s 1fb analysis employs 3 sets of cuts

LowPT Selection requires / ET > 120 GeV, one jet with pT (j1) > 120 GeV, |η(j1)| < 2, and events are vetoed if they contain a second jet with pT (j2) > 30 GeV and |η(j2)| < 4.5. HighPT Selection requires / ET > 220 GeV, one jet with pT (j1) > 250 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV or ∆φ(j2, / ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV. veryHighPT Selection requires / ET > 300 GeV, one jet with pT (j1) > 350 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV

  • r ∆φ(j2, /

ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV.

Which has most sensitivity?

ATLAS LowPT ATLAS HighPT ATLAS veryHighPT 1.0 fb−1 1.0 fb−1 1.0 fb−1 Expected 15100 ± 700 1010 ± 75 193 ± 25 Observed 15740 965 167

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SLIDE 38

Which Cuts?

ATLAS’s 1fb analysis employs 3 sets of cuts

LowPT Selection requires / ET > 120 GeV, one jet with pT (j1) > 120 GeV, |η(j1)| < 2, and events are vetoed if they contain a second jet with pT (j2) > 30 GeV and |η(j2)| < 4.5. HighPT Selection requires / ET > 220 GeV, one jet with pT (j1) > 250 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV or ∆φ(j2, / ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV. veryHighPT Selection requires / ET > 300 GeV, one jet with pT (j1) > 350 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV

  • r ∆φ(j2, /

ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV.

Which has most sensitivity?

ATLAS LowPT ATLAS HighPT ATLAS veryHighPT 1.0 fb−1 1.0 fb−1 1.0 fb−1 Expected 15100 ± 700 1010 ± 75 193 ± 25 Observed 15740 965 167

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SLIDE 39

Which Cuts?

ATLAS’s 1fb analysis employs 3 sets of cuts

LowPT Selection requires / ET > 120 GeV, one jet with pT (j1) > 120 GeV, |η(j1)| < 2, and events are vetoed if they contain a second jet with pT (j2) > 30 GeV and |η(j2)| < 4.5. HighPT Selection requires / ET > 220 GeV, one jet with pT (j1) > 250 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV or ∆φ(j2, / ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV. veryHighPT Selection requires / ET > 300 GeV, one jet with pT (j1) > 350 GeV, |η(j1)| < 2, and events are vetoed if there is a second jet with |η(j2)| < 4.5 and with either pT (j2) > 60 GeV

  • r ∆φ(j2, /

ET ) < 0.5. Any further jets with |η(j2)| < 4.5 must have pT (j3) < 30 GeV.

Which has most sensitivity?

ATLAS LowPT ATLAS HighPT ATLAS veryHighPT 1.0 fb−1 1.0 fb−1 1.0 fb−1 Expected 15100 ± 700 1010 ± 75 193 ± 25 Observed 15740 965 167

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SLIDE 40

Spectrum

consider a vector operator with only u-quarks:

  • 300

400 500 600 700 0.01 0.1 1 10 100 1000 E

  • T GeV

Events GeV ATLAS 7 TeV , 1 fb1, veryHighPt

  • ATLAS data

ATLAS BG

  • ur MC

DM signal

  • 200

300 400 500 600 0.1 10 1000 E

  • T GeV

Events GeV ATLAS 7 TeV , 1 fb1, LowPt

  • ATLAS data

ATLAS BG

  • ur MC

DM signal

Hard cuts are better.

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SLIDE 41

Limits on :

Set 90% CL limits:

Λ ≡ M √gχg1

χ2 ≡ [∆N − NDM(mχ, Λ)]2 NDM(mχ, Λ) + NSM + σ2

SM

= 2.71 .

∆N =

  • expected bound

Nobs − NSM

  • bserved bound ,

ΧΓΜΧuΓΜu Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV veryHighPt CMS LowPt HighPt

36pb-1

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SLIDE 42

Limits on :

Set 90% CL limits:

Λ ≡ M √gχg1

χ2 ≡ [∆N − NDM(mχ, Λ)]2 NDM(mχ, Λ) + NSM + σ2

SM

= 2.71 .

∆N =

  • expected bound

Nobs − NSM

  • bserved bound ,

ΧΓΜΧuΓΜu Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV veryHighPt CMS LowPt HighPt

Harder is better. in the future: populate the tail and keep cutting harder

36pb-1

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SLIDE 43

Other Operators:

veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΧuΓΜu ΧΓΜΧdΓΜd veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΓ5ΧuΓΜΓ5u ΧΓΜΓ5ΧdΓΜΓ5d

slide-44
SLIDE 44

Other Operators:

veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΧuΓΜu ΧΓΜΧdΓΜd veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΓ5ΧuΓΜΓ5u ΧΓΜΓ5ΧdΓΜΓ5d

same limit for SI and SD

slide-45
SLIDE 45

Other Operators:

veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΧuΓΜu ΧΓΜΧdΓΜd veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 800 900 WIMP mass mΧ GeV Cutoff scale GeV ΧΓΜΓ5ΧuΓΜΓ5u ΧΓΜΓ5ΧdΓΜΓ5d

same limit for SI and SD The limit is flat up to ~200 GeV. Goes all the way to zero.

slide-46
SLIDE 46

Other Operators:

The limit is flat up to ~200 GeV. Goes all the way to zero.

veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 100 200 300 400 500 600 WIMP mass mΧ GeV Cutoff scale GeV

ATLAS 7 TeV , 1 fb1

ΧR uL uL ΧR L R ΧR uL uL ΧR L R veryHighPt Solid : Observed Dashed : Expected 90 C.L. 0.1 1 10 100 1000 200 300 400 500 600 700 WIMP mass mΧ GeV Cutoff scale GeV

ATLAS 7 TeV , 1 fb1

Αs ΧΧ GΜΝGΜΝ

slide-47
SLIDE 47

⇒

σNq

1

= µ2 πΛ4 B2

Nq ,

σNq

2

= µ2 πΛ4 f 2

Nq ,

O1 = i gχ gq q2 − M2 (¯ qq) (¯ χχ) , O2 = i gχ gq q2 − M2 (¯ qγµq) (¯ χγµχ) i g g

Limits on :

The limits are fairly flat in mass (upto ~200 GeV). The limits are fairly independent of the operator

  • structure. Strong SD constraints.

These limits apply to iDM - Tevatron doesn’t care about 100 keV splittings.

Λ ≡ M √gχg1

For DD limits:

f p

u = f n d = 2

f p

d = f n u = 1

Same can be done for all operators.

with .

slide-48
SLIDE 48

SI Limit

Best limit at low mass

σNq

1

= µ2 πΛ4 B2

Nq ,

σNq

2

= µ2 πΛ4 f 2

Nq ,

90 C.L. 101 100 101 102 103 1046 1045 1044 1043 1042 1041 1040 1039 1038 1037 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

ATLAS 7TeV, 1fb1 VeryHighPt

Spinindependent Solid : Observed Dashed : Expected ΧΓΜΧqΓΜq Αs ΧΧ GΜΝGΜΝ C D M S XENON10 XENON100 DAMA q 33 CoGeNT CRESST

slide-49
SLIDE 49

SI Limit

Best limit at low mass

( r e d u c e d m a s s )

σNq

1

= µ2 πΛ4 B2

Nq ,

σNq

2

= µ2 πΛ4 f 2

Nq ,

90 C.L. 101 100 101 102 103 1046 1045 1044 1043 1042 1041 1040 1039 1038 1037 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

ATLAS 7TeV, 1fb1 VeryHighPt

Spinindependent Solid : Observed Dashed : Expected ΧΓΜΧqΓΜq Αs ΧΧ GΜΝGΜΝ C D M S XENON10 XENON100 DAMA q 33 CoGeNT CRESST

slide-50
SLIDE 50

SD Limit

Best spin dependent limit.

90 C.L. 101 100 101 102 103 1041 1040 1039 1038 1037 1036 1035 1034 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

ATLAS 7TeV, 1fb1 VeryHighPt

Spindependent Solid : Observed Dashed : Expected Χ Γ

Μ

Γ

5

Χ q Γ

Μ

Γ

5

q XENON10 P I C A S S O COUPP SIMPLE DAMA q 33

slide-51
SLIDE 51

Annihilation

A minimal light thermal relic is ruled out:

100 101 102 103 10 31 10 30 10 29 10 28 10 27 10 26 10 25 10 24 10 23 10 22 10 21 10 20 WIMP mass m Χ GeV Cross section Σ vrel for Χ Χ q q cm 3s

Annihilation into q q

Thermal relic vrel

2 0.24 freezeout

Χ Γ

Μ

Χ q Γ

Μ

q Χ Γ

Μ

Γ

5

Χ q Γ

Μ

Γ

5

q 90 C.L. Solid : Observed Dashed : Expected

slide-52
SLIDE 52

CDF Analysis

slide-53
SLIDE 53

Light Mediators

Lets fix and lower . Then drops as . For intermediate masses the limits is enhanced b/c of on-shell production, (depends on the width).

σDD ∼ g2

χ g2 q

µ2 M4 ,

σ1j ∼ αsg2

χg2 q

1 p2

T

M M 4

Collider losses quickly

10 50 100 5001000 5000 500 1000 1500 2000 Mediator mass M GeV 90 CL limit on cutoff scale lim GeV

Vector coupling m Χ 50 GeV m Χ 500 GeV Shading: M

3 … M 8 Π

g Χ gq contours

0.10.2 0.5 1 2 5 10

slide-54
SLIDE 54

LEP mono-photon

w/ Fox, Kopp and Tsai

arXiv:1103.0240

slide-55
SLIDE 55

LEP

Directly constrain DM coupling to electrons. But, in many models quark and lepton coupling are related (consider 2 benchmarks). LEP is a clean environment. Ability to measure missing mass. Places non-trivial limits also on indirect searches in lepton channels (e.g. the Hooperon).

slide-56
SLIDE 56

Operators

Same story w/ leptons (assume universality)

OV = (¯ χγµχ)(¯ ℓγµℓ) Λ2 , (vector, s-channel) OS = (¯ χχ)(¯ ℓℓ) Λ2 , (scalar, s-channel) OA = (¯ χγµγ5χ)(¯ ℓγµγ5ℓ) Λ2 , (axial vector, s-channel) Ot = (¯ χℓ)(¯ ℓχ) Λ2 , (scalar, t-channel)

slide-57
SLIDE 57

Mono-photon

Use spectrum shape to reject background peak.

  • 0.2

0.4 0.6 0.8 1.0 50 100 150 200 250 300 350 xΓ EΓEbeam Events 650 pb1 DELPHI 650 pb1 DELPHI MC

  • ur MC

DM signal

  • n-shell Z+photon
slide-58
SLIDE 58

Model Dependence

We limit lepton couplings. But how does DM couple to quarks? Consider 2 extreme cases:

Couplings to quarks are same as leptons. Couplings to quarks are zero.

Any other case can be derived from these two.

slide-59
SLIDE 59

DD Limits

90 C.L. 100 101 102 103 1044 1043 1042 1041 1040 1039 1038 1037 1036 1035 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

Equal couplings to all SM fermions

Spinindependent ΧΓΜΧ f ΓΜ f ΧΧ f f Χf f Χ CDMS XENON100 DAMA q 33 CoGeNT 90 C.L. 100 101 102 103 1041 1040 1039 1038 1037 1036 1035 1034 WIMP mass mΧ GeV WIMPproton cross section Σp cm2

Equal couplings to all SM fermions

Spindependent ΧΓΜΓ5Χ f ΓΜΓ5 f XENON10 PICASSO COUPP SIMPLE DAMA q 33

slide-60
SLIDE 60

DD Limits

90 C.L. 100 101 102 103 1044 1043 1042 1041 1040 1039 1038 1037 1036 1035 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

Equal couplings to all SM fermions

Spinindependent ΧΓΜΧ f ΓΜ f ΧΧ f f Χf f Χ CDMS XENON100 DAMA q 33 CoGeNT 90 C.L. 100 101 102 103 1041 1040 1039 1038 1037 1036 1035 1034 WIMP mass mΧ GeV WIMPproton cross section Σp cm2

Equal couplings to all SM fermions

Spindependent ΧΓΜΓ5Χ f ΓΜΓ5 f XENON10 PICASSO COUPP SIMPLE DAMA q 33

slide-61
SLIDE 61

Leptophilic DM

Consider zero couplings to quarks.

90 C.L. 100 101 102 103 1045 1044 1043 1042 1041 1040 1039 1038 1037 WIMP mass mΧ GeV WIMPproton cross section Σp cm2

Couplings to leptons only

Spinindependent ΧΓ

Μ

ΧΓ

Μ
  • ΧΧ

CDMS XENON100 DAMA q 33 CoGeNT

ℓ− ℓ− γ χ χ p+ p+

Direct detection pays a big price. Collider limits are strong.

slide-62
SLIDE 62

Many more..

Light mediators: Indirect detection:

slide-63
SLIDE 63

Indirect Detection

Tension with the “Hooperon”. Light thermal relic ruled out.

slide-64
SLIDE 64

Mono-something!

For specific models, we can probe the identity of the mediator with other mono-somthings. Mono-top signals can probe DM that is coupling via MFV operators (kamenik and Zupan). In many models DM couples via the Higgs. Mono-Z (and VBF) may be sensitive to this.

χ χ

Z0

Invisible Higgs searches can be interpreted as “direct detection” experiments!

A Characteristic Higgs Channel can confirm Higgs mediation!

slide-65
SLIDE 65

Higgs Mediator

χ χ

Z0

vs.

Direct detection is parametrically smaller!

Fox,RH, Kopp and Tsai

100 101 102 103 1046 1045 1044 1043 1042 1041 1040 1039 1038 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

ATLAS 30 fb1 upper bound projected

Spinindependent VBF mh120 GeV

  • m
h
  • 2

5 G e V

  • V

B F ZHinvmh120 GeV CDMS XENON10 XENON100 DAMA q 33 CoGeNT CRESST

slide-66
SLIDE 66

Games: Higgs searches & DM

Assume a Higgs mass that is already excluded for SM. Assume the reason it was excluded is an invisible branching fraction. This places a lower limit on the invisible BR. Places a lower limit on higgs mediated direct detection. Assume the Higgs hint is real w/ SM production. The fact that is was seen in diphoton with the rate that is has, places limits on competing modes, e.g. Higgs to invisible. Places upper limit on higgs mediated direct detection.

slide-67
SLIDE 67

To Conclude:

Colliders are placing competitive and complementary bounds to direct and to indirect detection: The Tevatron is the world record holder for light dark matter and for spin dependent. Dedicated CDF mono-jet is out. CMS, and ATLAS studies are underway. LEP mono-photons provide strong constraints. There is a nice interplay b/w visible and invisible Higgs searches and DM searches for Higgs-coupled DM. LHc

/

slide-68
SLIDE 68

Happy Birthday Graham!

slide-69
SLIDE 69

Current Higgs limits vs DM

Assume a Higgs mass that was already excluded for SM. Assume the reason it was excluded is an invisible branching fraction. This places a lower limit on the invisible BR. Places a lower limit on higgs mediated direct detection.

slide-70
SLIDE 70

Current Higgs limits vs DM

100 101 102 103 1046 1045 1044 1043 1042 1041 1040 1039 1038 WIMP mass mΧ GeV WIMPnucleon cross section ΣN cm2

CMS Higgs combined lower bound

Spinindependent mh250 GeV mh350 GeV m

h
  • 1

5 G e V CDMS XENON10 XENON100 DAMA q 33 CoGeNT CRESST

Also, if a light SM Higgs is discovered, an upper limit on DD can be extracted.

slide-71
SLIDE 71

CDF: jet + MET (1fb-1)

pT (j1) > 80 GeV / ET > 80 GeV pT (j2) < 30 GeV pT (j3) < 20 GeV

Observed: 8449 events

[http://www-cdf.fnal.gov/physics/exotic/r2a/20070322.monojet/public/ykk.html]

counting experiment:

slide-72
SLIDE 72

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.
slide-73
SLIDE 73

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.
slide-74
SLIDE 74

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

XENON100

slide-75
SLIDE 75

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

tri-leptons+ jets + MET

XENON100

slide-76
SLIDE 76

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

jets + MET tri-leptons+ jets + MET

XENON100

slide-77
SLIDE 77

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

jets + MET

{

same-sign di-leptons +MET tri-leptons+ jets + MET

XENON100

slide-78
SLIDE 78

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

jets + MET

{

same-sign di-leptons +MET tri-leptons+ jets + MET

“XENON100 is starting to probe the MSSM’s pseudopod, LHC killed the Membrane, but the ectoplasm is still safe.” [nature 67, 143 (2011)]

XENON100

slide-79
SLIDE 79

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.
slide-80
SLIDE 80

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.
slide-81
SLIDE 81

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

XENON100

slide-82
SLIDE 82

Collider Connections?

DM experiments and colliders are often said to be related in a specific framework (SUSY).

] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 ] 2 WIMP Mass [GeV/c 6 7 8 910 20 30 40 50 100 200 300 400 1000 ] 2 WIMP-Nucleon Cross Section [cm
  • 45
10
  • 44
10
  • 43
10
  • 42
10
  • 41
10
  • 40
10
  • 39
10 DAMA/I DAMA/Na CoGeNT CDMS EDELWEISS XENON100 (2010) XENON100 (2011) Buchmueller et al.

“XENON100 is starting to probe the MSSM’s pseudopod, LHC killed the Membrane, but the ectoplasm is still safe.” [nature 67, 143 (2011)]

XENON100