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超对称的现状和未来探索

超对称的现状和未来探索. 杨 金 民. 中科院理论物理所. 中国科大. 2014.4.4. Outline. 1 Introduction to SUSY. 2 Status of SUSY in light of LHC data. 3 Further probes of SUSY. at LHC-14/HL-LHC. at Xenon/LUX. at Higgs factory. at 100 TeV pp. 4 Conclusion. 1 Introduction to SUSY.

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超对称的现状和未来探索

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  1. 超对称的现状和未来探索 杨 金 民 中科院理论物理所 中国科大 2014.4.4

  2. Outline 1 Introduction to SUSY 2 Status of SUSY in light of LHC data 3 Further probes of SUSY • at LHC-14/HL-LHC • at Xenon/LUX • at Higgs factory • at 100 TeV pp 4 Conclusion

  3. 1 Introduction to SUSY With the discovery of the Higgs boson, the SM is completed. New physics beyond the SM certainly exists. SM Particles If we have naturalness, new physics should appear around TeV scale.

  4. The SM has the naturalness (or fine-tuning) problem Gerard ’t Hooft, Beijing Feb 25, 2014

  5. Nathan Seiberg IAS Feb 20, 2014

  6. Edward Witten Hunter College Mar 4, 2013

  7. Savas Dimopoulos Beijing Feb 24, 2014

  8. Savas Dimopoulos Beijing Feb 24, 2014

  9. Savas Dimopoulos Beijing Feb 24, 2014

  10. CMSSM mSUGRA GMSB AMSB … … SUSY MSSM NMSSM nMSSM … … Split-SUSY

  11. Now, we have various expt data: • Sparticle search results at LHC • Higgs data at LHC • Dark matter data (Planck, Xenon, LUX) • Low energy collider data (EWPD, flavor, g-2, …) Can SUSY satisfy/explain all current data ? Search for SUSY at LHC-14, Xenon, Higgs factory, SppC

  12. 2 Status of SUSY in light of LHC data BBC News Nov 19, 2012 SUSY may not be dead, but these latest results have certainly put it into hospital

  13. AMSB and GMSB: Baer, Barger, Mustafayev, arXiv:1202.4038 • To give a 125 GeV Higgs, • SUSY particles are above 10 TeV • not accessible at LHC • fine-tuning

  14. CMSSM/mSUGRA MSSM, NMSSM, nMSSM: arXiv: 1207.3698; 1202.5821 Cao, Heng, JMY, Zhu mSUGRA

  15. NMSSM • Solve little hierarchy problem • Dynamical solution to -problem • Theoretically motivated from top-down view E6 models (string-inspired) string scale SO(10)  U(1)  … at low energy: S, Hu,Hd+ heavy particles U(1) global PQ cubic term (NMSSM) to break U(1) PQ tadpole (nMSSM)

  16. Natural SUSY arXiv:1308.5307 Han, Hikasa, Wu, JMY, Zhang

  17. Split-SUSY arXiv:1310.1750 Wang, Wang, JMY

  18. So, the status of SUSY: GMSB/AMSB: can give 125 GeV Higgs with very heavy stop (fine-tuning) CMSSM/mSUGRA: can give 125 GeV Higgs; but cannot explain muon g-2 MSSM: can fit all data well but suffer from little fine-tuning nMSSM: nearly excluded (suppress diphoton rate too much) NMSSM: most favored (can fit all data well without fine-tuning) Split-SUSY: no problem (give up naturalness) No need to give up these fancy models (GMSB，CMSSM，mSUGRA, …)

  19. One way to repair GMSB: Kang, Li, Liu, Tong, JMY, arXiv:1203.2336 can have large At，giving 125 GeV Higgs without very heavy stops accessible at LHC

  20. For CMSSM/mSUGRA, give up muon g-2 work in progress

  21. CMSSM/mSUGRA

  22. 3 Further Probes of SUSY 3.1 Probe SUSY at LHC-14 & HL-LHC • Through looking for sparticles (stop, higgsinos) • Through some rare processes Higgs pair production Higgs decays to Z-photon vs diphoton Higgs decays to dark matter Higgs decays to singlet-like scalar Higgs decays to goldstini Top decay t->ch

  23. Search for stop pair in natural-SUSY arXiv:1206.3865 Cao, Han, Wu, JMY, Zhang

  24. Higgsino pair production in natural-SUSY arXiv:1206.3865 Han, Kobakhidze, Liu, Saavedra, Wu, JMY Important for natural SUSY

  25. Higgsino pair production in multi-sector SUSY breaking arXiv:1403.5731 Hikasa, Liu, JMY, Wang

  26. arXiv:1301.6437 Cao, Heng, Shang, Wan, JMY • Higgs pair productionat LHC-14 arXiv:1307.3790 Han, Ji, Wu, Wu, JMY

  27. Z versus   at LHC-14 arXiv:1301.4641 Cao, Wu, Wu, JMY

  28. Higgs decays to dark matter in NMSSM arXiv:1311.0678 Cao, Han, Wu, JMY NMSSM

  29. Higgs decays to singlet-like scalar in NMSSM arXiv:1309.4939 Cao, Ding,Han, JMY, Zhu

  30. Higgs decays to goldstini in multi-sector SUSY breaking arXiv:1301.5479 Liu, Wang, JMY

  31. SUSY residual effects in top decay Cao, Han, Wu, JMY, Zhang 1403:???? MSSM Squark: 2-5 TeV

  32. 3.2 Probe SUSY via dark matter detection CMSSM/mSUGRA in progress

  33. arXiv: 1207.3698 Cao, Heng, JMY, Zhu MSSM, NMSSM

  34. arXiv:1104.1754 Cao, Hikasa, Wang, JMY NMSSM (light dark matter) arXiv:1311.0678 Cao, Han, Wu, JMY

  35. arXiv:1310.1750 Wang, Wang, JMY Split-SUSY

  36. 3.3 Probe SUSY at Higgs factory Direct production of sparticles: (by T. Li et al) For an e+e- Higgs factory (250 GeV ) : Direct search of SUSY is limited We may look for quantum effects of SUSY

  37. So far, SUSY Higgs couplings can deviate from SM significantly: arXiv:1207.3698 Cao, Heng, JMY, Zhu

  38. Higgs production at e+e- Higgs factory (250 GeV ) can sizably differ from SM: Han, Wu, Wu,JMY, in progress SUSY

  39. arXiv:1402.3050 Hu, Liu, Ren, Wu SUSY

  40. A  Higgs factory (E >125 GeV)

  41. Finally, can a 100 TeV pp collider find SUSY particles ?

  42. 4 Conclusion Confronted with LHC Higgs data: • Some SUSY models are healthy • Some SUSY models need repairing Probe SUSY at LHC: • Looking for sparticles (stop, higgsino) • Higgs pair production • Higgs decays to Z-photon vs diphoton • Higgs decays to dark matter • Higgs decays to goldstini • Top decay t -> ch Probe SUSY at Higgs factory (via Higgs couplings or quantum effects): Probe SUSY at 100 TeV pp collider

  43. Thanks

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