Dark Forces

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Presentation at Dark Forces 2009 Workshop held at SLAC in September 2009.

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  • 1. Non-Abelian Dark ForcesSMDMJay WackerSLACDark Forces WorkshopSept. 25, 2009

2. Plan of TalkNon-Abelian Dark Sectors & DAMA Producing Dark SectorGeneric Signatures 3. Non-Abelian Dark SectorsSM DM1 Ldark = Tr G + q iD q + mq 2 q 2 Confines or is Broken at low energies 2dark exp b0 darkLarge range of possibilities 4. Non-Abelian Dark SectorsSM DM1 Ldark = Tr G + q iD q + mq 2 q 2 Confines or is Broken at low energies 2dark exp b0 darkLarge range of possibilitiesSU (Nc ) gauge groupLight flavorsHeavy flavors 5. 11 Years of Oscillation A distinctive recoil spectrum 6. Inelastic Dark Matter Tucker-SmithWeiner (2001)Dark matter has 2 nearly Scattering off the SM isdegenerate states1 22 Nm O(100 keV) 2 11 N3 Consequences: Scatters off of heavier nuclei (CDMS ineffective)Large recoil energy(Xe10Zep3 didnt look)Large modulation fraction (Smaller absolute signal) 7. Inelastic Dark MatterA new number to explain: mm 10 6 Sign of dark sector dynamics First of many splittings New interactions to discover Changes what questions are interesting 8. Composite Dark Matter A new SU(Nc) gauge sector Confines at Dark mH qLmLdark A pair of quarks: qH mHdark dark mL 9. Composite Dark Matter A new SU(Nc) gauge sector Confines at Dark mH qLmLdark A pair of quarks: qH mHdark dark mL A cosmological asymmetry (nH nH ) = (nL nL ) = 0 At TDark DM is in qH qL bound statesDark Mesons 10. Degeneracy of the Ground StateHeavy quark spin preserved in electric interactionsDark Chromomagnetic interaction breaks spin symmetry qH qL dmB d H mH Spin 0Spin 1 Dark Pion Dark Rho d d md md 2 DarkmH Doesnt require adding new symmetry and breaking it Accidental global symmetry from Lorentz Invariance 11. Coupling to the SM Kinetically Mix U (1)Y with U (1)dark Lmix = Fdark FY U(1)Y U(1)dark SMDM At low energy Lint =Adark jEM Higgs U(1)dark near EW scaleLHiggs = |D d | V (d ) 2 2 2 md Ad 12. Inelastic Dark Matter Combining all null experiments with DAMA140 120md 70 GeV m 95 keV m keV1008060 Dark Matter Mass GeV100 200300 400 500 600 darkm md80 MeVBeneath Hadronic threshold 13. Plan of TalkNon-Abelian Dark SectorsDAMA Producing Dark SectorGeneric Signatures 14. Collider Signatures ++Light mesonsD DDsD 23-4/5-))' 0/-(*5506)'!-7')!#$%'()*# +*,'#-.qD +!#*/01)0*/ sD e + #*89+5:-;+'#0(5- e''/)qD mA D D + D D Lepton Jets =**)'!-;#*!8()-#'(*05-*-;+*)*/ D + + D 15. New Tools New Strong Signal Simulation(J. Wacker w/ S. Schumann, P. Richardson, F. Krauss)Dark Showering SherpaHerwig Hadron Spectrum DarkSpecGen Dark HadronizationSherpaHerwig Cascading to SMDarkSpecGen 16. Boosted Physics When high pT particlescascade to SM final states producing collimated final statesLepton JetsA Challenging Environment Reconstruction is difficultIsolation cuts out signal Cascades produce heterogeneous final states 17. 1 Light Flavor SpectrumNo light pions - Only eta primeNo hadronic decays~1 dozen quasi stable particles 2dark2++1+2 2 + 1+0 0+1 dark0++ 0+J ++J + J +J Only weak decays: quasi-stable particles 18. 1 Light Flavor SpectrumNo light pions - Only eta primeNo hadronic decays~1 dozen quasi stable particles 2dark2++1+2 2 + 1+0 0+1 dark0++ 0+J ++J + J +J Only weak decays: quasi-stable particles !#$%''+$,#'%-+.)( D#()*#! D$/0$,$1'-AA 19. 1 Light Flavor SpectrumNo light pions - Only eta primeNo hadronic decays~1 dozen quasi stable particles 2dark2++1+2 2 + 1+0 0+1 dark0++ 0+J ++J + J +J Only weak decays: quasi-stable particles !#$%''+$,#'%-+.)( D#()*#! D$/0$,$1'-AA 20. 1 Light Flavor SpectrumNo light pions - Only eta primeNo hadronic decays~1 dozen quasi stable particles 2dark2++1+2 2 + 1+0 0+1 dark0++ 0+J ++J + J +J Only weak decays: quasi-stable particles !#$%''+$,#'%-+.)( D#()*#! D$/0$,$1'-AA Some short-livedSome long lived Lots of visible particles 21. Multiple Light Flavor Spectrum Light pionsm = mq darkI=0I=1 dark J ++ J + J + J J ++ J +J + J 22. Multiple Light Flavor Spectrum Light pionsm = mq darkI=0 I=1 darkDecays to Dark PionsJ ++ J + J + J J ++J + J + J 23. Multiple Light Flavor SpectrumLight pions m = mq darkI=0 I=1 darkDecays to Dark PionsJ ++ J + J + J J ++J + J + J qq qq q q q q .. . 24. Multiple Light Flavor SpectrumLight pions m = mq darkI=0I=1 darkDecays to Dark PionsJ ++ J + J + J J ++ J +J + J qq qqfew q q q q Unstable O(NF ) visible.. . Stable O(NF ) 2 particles 25. No light flavors Quirks (Luty et al 2008) Spectra similar to 1 light flavor (Lattice calculations available) We dont know how to hadronize(how to cut color lines) More theory work necessary 26. Plan of TalkNon-Abelian Dark SectorsDAMA Producing Dark SectorGeneric Signatures 27. Two-Lepton Lepton Jets 2 oppositely signed leptons in a small cone+ + RSignal0.1HadronAd 0.1RIso0.4 Hadron + e+ e 28. Four-Lepton Lepton Jet Multistep cascadeDecay Topology Relevant Parameters pT 1 m1 m2 22c1 c2 1 Displaced VerticesRSignal0.1c1 0.1RIso0.4 c2 29. Outlook Non-Abelian Dark Sectors dynamics can explain anomaliesNew collider signatures predictedHow to match signals on to theories? Advances in theory are needed Hadronization Hadronic spectrumShowering Lots of work in progress...