Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width...
Transcript of Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width...
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Lepton Jets Korea Itay Yavin
Lepton JetsItay Yavin
Princeton/NYU University
M. Baumgart, C. Cheung, J. T. Ruderman, L. T. Wang and I. Y. 0901.0283 [hep-ph]C. Cheung, J. T. Ruderman, L. T. Wang and I. Y. 0902.3246[hep-ph]
C. Cheung, J. T. Ruderman, L. T. Wang and I. Y. tomorrow and tomorrow and tomorrow, creeps in this petty pace…
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Lepton Jets Korea Itay Yavin
Contents• Motivation
o New observations may be interpreted as an extended dark sector. o A light (~ GeV) sector weakly coupled to the SM.
• Production of Dark Stateso Different operators that couple the SM to the DS.o Survey of channels at high energy colliders.
• Lepton Jetso What are lepton jets - qualitative definition and examples.o Searching for lepton jets - quantitative definition . . .
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Lepton Jets Korea Itay Yavin
Part I
A Light Dark Sector
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Lepton Jets Korea Itay Yavin
Dark Matter
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
Bullet Cluster
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
Bullet ClusterWMAP
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
Bullet ClusterWMAP Direct Detection
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
Bullet ClusterWMAP Direct Detection
Indirect Detection
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Lepton Jets Korea Itay Yavin
Dark Matter
Rotation curves
Lensing Effect
Bullet ClusterWMAP Direct Detection
Indirect Detection
Direct Production
???
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Lepton Jets Korea Itay Yavin
Indirect Detection
annihilationkpc
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Lepton Jets Korea Itay Yavin
PAMELAIn Oct. 2008, the Payload for Anti-Matter Exploration and Light-nuclei Astrophysics reported a sharp raise in the positron content of cosmic rays from 10-50 GeV.
1) No anti-protons excess observed!!!
2) Very sharp rise.
3) Demands a large ann. Cross-section
Similar results have been seen by ATIC and FERMI, extending to higher energies.
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Matter InteractionsArkani-Hamed, Finkbeiner, Slatyer, and Weiner (0810.0713) suggested a heavy relic (~ TeV) which couples to a new abelian gauge-group,
SM DS
http://pdg.lbl.gov
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Lepton Jets Korea Itay Yavin
Dark Spectrum
TeV
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Lepton Jets Korea Itay Yavin
Dark Spectrum
GeV
TeV
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Lepton Jets Korea Itay Yavin
Dark Spectrum
~ MeV
GeV
TeV
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Lepton Jets Korea Itay Yavin
Dark Spectrum
~ GeV
~ MeV
GeV
TeV
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Lepton Jets Korea Itay Yavin
Dark Spectrum
~ GeV
~ MeV
GeV
TeV
Can produce at colliders!!!
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Lepton Jets Korea Itay Yavin
Hidden ValleysStrassler and Zurek’s proposal of hidden valleys share some of the phenomenology and Lepton Jet searches can in principle be sensitive to these type of models as well,
* Taken from Strassler’s talk.
Light states
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Lepton Jets Korea Itay Yavin
Coupling to the Standard Model
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Lepton Jets Korea Itay Yavin
Coupling to the Standard ModelIn general the dark gauge-boson can mix with both the photon and the Z0,
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Lepton Jets Korea Itay Yavin
Coupling to the Standard ModelIn general the dark gauge-boson can mix with both the photon and the Z0,
If supersymmetry is only softly broken in the dark sector, then there is also an important mixing of the electroweak gauginos with the dark gaugino:
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Lepton Jets Korea Itay Yavin
Coupling to the Standard ModelIn general the dark gauge-boson can mix with both the photon and the Z0,
If supersymmetry is only softly broken in the dark sector, then there is also an important mixing of the electroweak gauginos with the dark gaugino:
All in all we have the following couplings (after diagonalization and etc.), which act as a portal to the dark sector
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Lepton Jets Korea Itay Yavin
Limits on Kinetic MixingThe kinetic mixing with the photon is bounded by low energy experiments, in particular the muonic g-2 ratio (Pospelov 0811:1030):
Notice that this measurement does not bound
* Taken from Pospelov 0811:1030
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Lepton Jets Korea Itay Yavin
Part II
Production and Evolution of Dark States
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction:
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction: Prompt Dark Photon
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction: Prompt Dark Photon Rare Z0 decays
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction: Prompt Dark Photon Gaugino Pair ProdRare Z0 decays
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction: Prompt Dark Photon Gaugino Pair ProdRare Z0 decays
Evolution: Dark Radiation
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Lepton Jets Korea Itay Yavin
Origin of a SpeciesProduction: Prompt Dark Photon Gaugino Pair ProdRare Z0 decays
Evolution: Dark Radiation Dark Cascades and Lepton Jets
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
The dark higgs is unstable, but it’s decay width depends on its mass relative to the dark photon!
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
The dark higgs is unstable, but it’s decay width depends on its mass relative to the dark photon!
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
The dark higgs is unstable, but it’s decay width depends on its mass relative to the dark photon!
Prompt decay(Many leptons)
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
The dark higgs is unstable, but it’s decay width depends on its mass relative to the dark photon!
Prompt decay(Many leptons)
Intermmediate life-time
(displaced vertex)
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Lepton Jets Korea Itay Yavin
Dark Higgs SectorSomething has to spontaneously break the dark gauge-symmetry and I will assume it is some fundamental scalar that gets a vacuum expectation value.
The dark higgs is unstable, but it’s decay width depends on its mass relative to the dark photon!
Prompt decay(Many leptons)
Intermmediate life-time
(displaced vertex)
Very long lived (missing E)
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Lepton Jets Korea Itay Yavin
Dark RadiationSince the dark state are extremely boosted, they will radiate dark gauge-bosons,
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Lepton Jets Korea Itay Yavin
Dark RadiationSince the dark state are extremely boosted, they will radiate dark gauge-bosons,
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Lepton Jets Korea Itay Yavin
Cascades in the DarkAfter showering finishes, the dark higgses will cascade down to the standard model. If we consider a simple model with 2 dark higgses, then there are several possibilities:
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Lepton Jets Korea Itay Yavin
Cascades in the DarkAfter showering finishes, the dark higgses will cascade down to the standard model. If we consider a simple model with 2 dark higgses, then there are several possibilities:
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Lepton Jets Korea Itay Yavin
Cascades in the DarkAfter showering finishes, the dark higgses will cascade down to the standard model. If we consider a simple model with 2 dark higgses, then there are several possibilities:
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Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
![Page 51: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/51.jpg)
Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
Lepton-pair
Too much background!!!
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Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
![Page 53: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/53.jpg)
Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
![Page 54: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/54.jpg)
Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
Lepton Jets - A collimated collection of energetic leptons with a small opening angle.
![Page 55: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/55.jpg)
Lepton Jets Korea Itay Yavin
Prompt (Dark) Photon ProductionThe coupling to the electromagnetic current allows for the production of the dark photon in a similar manner to a prompt photon:
Lepton-Jet recoiling against a QCD jet:
Lepton Jets - A collimated collection of energetic leptons with a small opening angle.
![Page 56: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/56.jpg)
Lepton Jets Korea Itay Yavin
Cross-Sections at the LHC
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Lepton Jets Korea Itay Yavin
Cross-Sections at the LHC
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Lepton Jets Korea Itay Yavin
Standard Model BackgroundThe SM can give 2 muon pairs recoiling against a jet and that is an irreducible background. Simulation with Madgraph suggest that this is not going to be a serious obstacle:
… and many more . . .This can be reduced to < 1 fb by requiring:
ΔR < 0.1pT > 3 GeV
For all 4 muons.
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Lepton Jets Korea Itay Yavin
Rare Z DecayThe neutral vector-boson couples directly to the dark current. Therefore, the dark higgses and can be directly produced:
![Page 60: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/60.jpg)
Lepton Jets Korea Itay Yavin
Rare Z DecayThe neutral vector-boson couples directly to the dark current. Therefore, the dark higgses and can be directly produced:
![Page 61: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/61.jpg)
Lepton Jets Korea Itay Yavin
Rare Z DecayThe neutral vector-boson couples directly to the dark current. Therefore, the dark higgses and can be directly produced:
Lepton Jets - A collimated collection of energetic leptons with a small opening angle.
![Page 62: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/62.jpg)
Lepton Jets Korea Itay Yavin
Rare Z0 Decay
At LEP :
At Tevatron and LHC :
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Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
![Page 64: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/64.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
![Page 65: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/65.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
![Page 66: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/66.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
![Page 67: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/67.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
Dark Radiation.
![Page 68: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/68.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
Soft Lepton Jet.
Dark Radiation.
![Page 69: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/69.jpg)
Lepton Jets Korea Itay Yavin
Neutralino DecayThe bottom of the SUSY cascade is no longer stable. It will decay into the dark dark sector.
Soft Lepton Jet.
Dark Radiation.
![Page 70: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/70.jpg)
Lepton Jets Korea Itay Yavin
LHC/Tevatron Reach
* This is for a squark mass of 750 GeV.
These are large cross-sections. Some of the parameter space can already be excluded by Tevatron searches.
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Lepton Jets Korea Itay Yavin
Part III
Lepton Jets
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Lepton Jets Korea Itay Yavin
Lepton JetsLepton Jets -
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Lepton Jets Korea Itay Yavin
Lepton JetsLepton Jets -
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Lepton Jets Korea Itay Yavin
Lepton JetsLepton Jets -
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Lepton Jets Korea Itay Yavin
Lepton JetsLepton Jets -
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Lepton Jets Korea Itay Yavin
Full Evolution
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Lepton Jets Korea Itay Yavin
Lego PlotsFor a 500 GeV LSP pair production, the event looks like:
![Page 78: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/78.jpg)
Lepton Jets Korea Itay Yavin
Experimental DiscoveryWhen looking for lepton-jets, it is important to attempt inclusive searches:
1) Isolation cuts around the hard lepton(s) should exclude hadronic activity, but if possible allow for other leptonic activity (a lepton bunch may contain more than 2).
2) Looking for a very particular final state is probably too exclusive and usually involve too much theory-bias. . .
3) By defining “Lepton-Jet” objects (as inclusive as possible), searches can be designed to look for events containing “Lepton-Jet”s in the final state (and possibly additional stuff).
4) While a resonance structure is probably present, since we don’t know the mass, it may not very useful to implement mass-window cuts and etc.
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Lepton Jets Korea Itay Yavin
Sources of Lepton Jets
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Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
![Page 81: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/81.jpg)
Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
![Page 82: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/82.jpg)
Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
![Page 83: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/83.jpg)
Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
3) Dark radiation
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Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
3) Dark radiation
There are different ways of producing dark states:
![Page 85: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/85.jpg)
Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
3) Dark radiation
There are different ways of producing dark states:
1) Prompt dark photon
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Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
3) Dark radiation
There are different ways of producing dark states:
1) Prompt dark photon
2) Rare Z decays
![Page 87: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/87.jpg)
Lepton Jets Korea Itay Yavin
Sources of Lepton JetsThere are different possibilities for obtaining lepton-jets:
1) A non-abelian structure in the dark sector
2) Dark higgs(es) decay
3) Dark radiation
There are different ways of producing dark states:
1) Prompt dark photon
2) Rare Z decays
3) Susy cascades
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Lepton Jets Korea Itay Yavin
Future Directions• Searches at LEP and Tevatron.
• Searches at BaBar/Belle (see Essig, Schuster, and Toro ) .
• Tune and modify triggers (see Demirkoz and Moore).
• Lepton-Jet observables?
• Other scenarios with similar signatures? (see Strassler and Zurek).
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Lepton Jets Korea Itay Yavin
Motivation 2Aside from the recent astrophysical observations, there can be another motivation for looking for such objects.
![Page 90: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/90.jpg)
Lepton Jets Korea Itay Yavin
Motivation 2Aside from the recent astrophysical observations, there can be another motivation for looking for such objects.
keV
MeV
GeV
TeV
![Page 91: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/91.jpg)
Lepton Jets Korea Itay Yavin
Motivation 2Aside from the recent astrophysical observations, there can be another motivation for looking for such objects.
keV
MeV
GeV
TeV
Luminosity
![Page 92: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/92.jpg)
Lepton Jets Korea Itay Yavin
Motivation 2Aside from the recent astrophysical observations, there can be another motivation for looking for such objects.
keV
MeV
GeV
TeV
Luminosity
![Page 93: Lepton Jets - KIASworkshop.kias.re.kr/hepph09dm/talk/[8-27] Yavin.pdf · but it’s decay width depends on its mass relative to the dark photon! Lepton Jets Korea Itay Yavin Dark](https://reader033.fdocuments.us/reader033/viewer/2022041510/5e2798b44efd176098265dea/html5/thumbnails/93.jpg)
Lepton Jets Korea Itay Yavin
Motivation 2Aside from the recent astrophysical observations, there can be another motivation for looking for such objects.
keV
MeV
GeV
TeV
Luminosity
LuminosityFrontier
Weakly coupled physics be there
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Detector Performance
Bilge Demirkoz and Roger Moore investigated ATLAS performance using the prompt dark photon production as a benchmark.
Bilge Demirkoz also implemented new triggers to help improve the efficiency associated with such events.
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Lepton Jet Efficiency
300
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Lepton Jets Korea Itay Yavin
Resolution of PAMELASo dark matter annihilates to dark photons first. The dark photons then decay into leptons.
1) Protons are kinematically disallowed.
2) The leptons are direct products of the annihilations.
3) Sommerfeld enhancement of the cross-section due to light particle exchange.