1 / 18

Dark Matter

Dark Matter. Expect Unexpected outside LHC. Jingsheng Li. Introduction. SM is confirmed precisely? NO! Dark Matter is OUT THERE!! SC=SM+more ∟ (New Phy=ptc+int) +unexpected ∟ astrophy effect? ∟ modify gravity?. Outline. Standard Cosmology Evidence for Dark Matter

kailey
Download Presentation

Dark Matter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dark Matter Expect Unexpected outside LHC Jingsheng Li

  2. Introduction • SM is confirmed precisely? • NO! • Dark Matter is OUT THERE!! • SC=SM+more • ∟(New Phy=ptc+int) +unexpected • ∟astrophy effect? • ∟ modify gravity?

  3. Outline • Standard Cosmology • Evidence for Dark Matter • Relic Density • Candidates • Dark Matter Detection

  4. Standard Cosmology • Smooth Universe • Friedman Eqn • Content ( w=/P, ) • baryon w=0 radiation w=1/3 c.d.m. w=0 c.c. w=-1

  5. A Brief History of Universe

  6. Properties of DM • Dark (rotation curve, gra. lensing) • Cold (Structure formation) • Weakly Interacting(rotation curve, Bullet Cluster) • b/m=1/6 (BBN, CMB, Bullet Cluster 1E0657-558)

  7. Evolution of CDM • Boltzmann Eqn (1+23+4) • Note: • Eq (T>m), freeze out (T<m)

  8. Relic Density

  9. Lee-Weinberg Bound • Anti-baryon • 45GeVL • Scalar DM Higgs exchange, even weaker, expect for Boehm, Fayet (N=2) Lee-Weinberg is good for >GeV range

  10. Candidate VS Test UED w/ KK-parity, LH w/ T-parity, Techni Baryon, monopole, R….

  11. SUSY WIMP • SUSY w/ R-parity provides LSP • Spctrum depends on Mediation Scheme • Hidden Sector • GMSB: gravitino as LSP, cosmo constraint: • NLSP decay, BBN and CMB constraints • Gravity Mediated , decay, BBN constraint • Neutralino as LSP: In Lee-Weinberg bound

  12. Neutralino • Decay channels • univ~10Gyr, set upper bound for Mh2<0.3,lower bound for , upper bound for mint. • Cosmology set upper bound on superpartner, good for LHC?

  13. Axion (non-thermal CDM) • PQ SSBAxion • PQ EB  • Coupling to Nucleon • Red Giant emission bound • SN1987A bound • Oscillation energy • Critical density bound • Search:

  14. Detection • MET • Direct Detection • Indirect Detection

  15. Direct Detection

  16. Indirect Detection

  17. Result from indirect detection • e+ excess beyond prediction10 GeV ~ 100GeV (PAMELA), e+e- excess upto TeV (ATIC) • ATIC: sharp falling @ 600GeVno astrophy explaination • SUSY needs 10TeV for PAMELA • No p- excess • Usual Neutralino can’t explain • Very large <v>, conflicts with required relic density.

  18. Solution? • New interaction to annihilate  • Sommerfeld enhancement (Arkani-Hamed)Breit-Wigner enhancement (Murayama)Nonthermal production (Kumar) • DM decay

More Related