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Search for New Physics beyond the SM

This research focuses on exploring new physics beyond the Standard Model by analyzing data from various experiments in nuclear physics, particle physics, and astrophysics/cosmology. Collaborations with experts in the field have led to significant advancements in the study of dark matter, superWIMPs, and low energy precision SUSY.

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Search for New Physics beyond the SM

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  1. Search for New Physics beyond the SM DOE Review 2006 Shufang Su • U. of Arizona

  2. Data from sky: WMAP, supernovae, sky survey, … Low energy Precision measurement LC Tevatron (now) LHC (2007) LEP - p p p e- e+ p Experiments DOE Review, 2006

  3. Dark Matter Indirect Searches Direct Searches We live in a fascinating time when rich data is / will be available My work focuses on searching for new physics beyond the SM • Involve experiments in • Nuclear physics • Particle physics • Astrophysics/Cosmology DOE Review, 2006

  4. Students and Postdoc - • Postdoc • Hock-Seng Goh (3rd year) • Grad Students • Ethan Dolle (4th year) • Xinyu Miao (3rd year) • Undergrad Students • Jessica Goodman DOE Review, 2006

  5. Dark Matter Studies DOE Review, 2006

  6. Dark Matter - » 0.5% » 0.5% =3% =23% § 4% =73% § 4% • Remarkable agreement • Remarkable precision (~10%) DOE Review, 2006

  7. Research and Collaborations - • superWIMP Dark Matter J. Feng (UC Irvine), F. Takayama (Cornell) • SuperWIMP Cosmology and Collider Physics Jonathan L. Feng, Arvind Rajaraman, Bryan T. Smith, Shufang Su, Fumihiro Takayama, hep-ph/0410178. • SuperWIMP Dark Matter in Supergravity with a Gravitino Jonathan L. Feng, Shufang Su, Fumihiro Takayama, hep-ph/0410119. • Supergravity with a Gravitino LSP Jonathan L. Feng, Shufang Su, Fumihiro Takayama, Phys.Rev. D70 (2004) 075019. • SuperWIMP Gravitino Dark Matter from Slepton and Sneutrino Decays Jonathan L. Feng, Shufang Su, Fumihiro Takayama, Phys.Rev. D70 (2004) 063514. DOE Review, 2006

  8. superWIMP 106 Thermal equilibrium $ ff - WIMP  superWIMP + SM particles FRT hep-ph/0302215, 0306024 Universe cools: n=nEQe-m/T WIMP 104 s  t  108 s Freeze out, n/s » const SWIMP SM superWIMP e.g. Gravitino LSP LKK graviton WIMP • neutral • charged DOE Review, 2006

  9. Research and Collaborations - • Dark Matter Production at Colliders J. Feng (UC Irvine), F. Takayama (Cornell) • Minimum Rates for Dark Matter Production at the Large Hadron Collider and International Linear Collider Jonathan L. Feng, Shufang Su, Fumihiro Takayama, Phys. Rev. Lett. 96, 151802 (2006) DOE Review, 2006

  10. Dark Matter Production at Colliders DM f f DM f DM f DM - Cross symmetry DM annihilation DM production • / 1/hi Not overclose universe  Efficient annihilation then Efficient production at collider Upper bound on  Lower bound on rates DOE Review, 2006

  11. SuperWIMP with charged WIMP at LHC - Signal: two isolated charged tracks, large dE/dx || 2.5,  0.7 DOE Review, 2006

  12. Research and Collaborations - • Dark matter of the left-right twin Higgs model E. Dolle (UA), J. Goodman (U. of Arizona) • Dark Matter of the Left-Right Twin Higgs Model E. Dolle, J. Goodman, S. Su, in preparation. 300 400 500 600 700 DOE Review, 2006

  13. Indirect Searches for New Physics DOE Review, 2006

  14. Research and Collaborations - • Low Energy Precision SUSY A. Kurylov, M. Ramsey-Musolf, Sean Tulin (Caltech) • Charged Current Universality Problem and NuTeV Anomaly: IS SUSY to Blame? Andriy Kurylov, Michael Ramsey-Musolf, Shufang Su, AIP Conf.Proc.698 (2004) 188. • Probing Supersymmetry with Neutral Current Scattering Experiments Andriy Kurylov, Michael Ramsey-Musolf, Shufang Su, AIP Conf.Proc.698 (2004) 168. • Supersymmetric Effects in Parity Violating Deep Inelastic Electron Nucleus Scattering Andriy Kurylov, Michael Ramsey-Musolf, Shufang Su, Phys.Lett.B582:222-228,2004. • Probing Supersymmetry with Parity Violating Electron Scattering Andriy Kurylov, Michael Ramsey-Musolf, Shufang Su, Phys.Rev.D68:035008,2003. DOE Review, 2006

  15. Research and Collaborations - • Low Energy Precision SUSY (cont’) A. Kurylov, M. Ramsey-Musolf, Sean Tulin (Caltech) • Supersymmetric Effects in Deep Inelastic Neutrino Nucleus Scattering Andriy Kurylov, Michael Ramsey-Musolf, Shufang Su, Nucl.Phys.B667:321-348,2003 . • SUSY Effects in Pion Decay Michael Ramsey-Musolf, Shufang Su, Sean Tulin, in preparation. DOE Review, 2006

  16. Q-Weak (JLab) Møller Scattering Atomic Parity Violation e g e e e e e e Z Z g g Cs133 Z g e p e • Coherent quarks in P • Results in ~2009 • 2(2C1u+C1d) Z • Purely leptonic n • Coherent quarks in entire nucleus • Nuclear structure uncertainties • -376 C1u – 422 C1d Neutrino Scattering DIS-Parity • Quark scattering (from nucleus) • Weak charged and neutral current difference n n n m • Isoscaler quark scattering • (2C1u-C1d)+Y(2C2u-C2d) Z W + DOE Review, 2006

  17. QWe Jlab Moller Qweak DIS-parity Standard Model Prediction Erler, Kurylov & Ramsey-Musolf, Phys. Rev. D 72, 073003 (2005) Test of sin2W Running - Weak mixing anglesinW g sinW = g’ cosW = e SLAC E158 NuTeV Cs APV DOE Review, 2006

  18. Kurylov, Ramsey-Musolf, Su (2003) MSSM loop RPV 95% CL No SUSY DM 4% Qweak Future 2.5% Moller Parity-Violating Electron Scattering - DOE Review, 2006

  19. Research and Collaborations - • Physics report review paper: Low Energy Precision Supersymmetry Michael Ramsey-Musolf, Shufang Su, to appear. • Introduction to supersymmetry • Renormalization • Z-pole precision measurements • Neutral current studies • Charge current studies • Flavor physics, CP violation and baryongenesis • Higgs searches DOE Review, 2006

  20. Research and Collaborations - • Precision studies of MSSM M. Ramsey-Musolf, Sean Tulin (Caltech) • MSSM Contribution to Precision Observables Michael Ramsey-Musolf, Shufang Su, Sean Tulin, in preparation. • Precision Study of SUGRA, GMSB and AMSB A. Dedes (Munich), S. Heinemeyer (CERN), G. Weiglein (IPPP, Durham), X. Miao (UA) • The Lightest Higgs Boson of mSUGRA, mGMSB and mAMSB at Present and Future Colliders: Observability and Precision Analyses Dedes, Sven Heinemeyer, X. Miao, Shufang Su, Georg Weiglein,Nucl.Phys.B674:271-305,2003. • Distinguish SUSY Breaking Scenario in Precision Studies Sven Heinemeyer, X. Miao, Shufang Su, Georg Weiglein, in preparation. DOE Review, 2006

  21. Precision Study of SUGRA, GMSB and AMSB - GMSB @ ILC DOE Review, 2006

  22. Direct Searches for New Physics DOE Review, 2006

  23. Research and Collaborations - • Collider Study of the left-right twin Higgs Model H.S. Goh (UA) • Collider Phenomenology of the Left-Right Twin Higgs Model Hock-Seng Goh, Shufang Su, hep-ph/0611015 • Collider Signatures of the Left-Right Twin Higgs Model Hock-Seng Goh, Shufang Su, hep-ph/0608330 DOE Review, 2006

  24. LRTH: Parameters and Spectrum fixed by Higgs VEV - • Model parameters: f1, (f2, y), , M, B,  • Determine particle masses and interactions = 4f1 or 2f1 M=150 GeV B=50 GeV  = f1/2 fixed by top quark mass DOE Review, 2006

  25. Heavy Gauge Bosons - • Drell-Yan process DOE Review, 2006

  26. ZHdecay - • ZH DOE Review, 2006

  27. Research and collaborations 3 b + 1 j + 1 lepton + missing ET j b W b  l t tH b  - • Collider Study of the Left-Right Twin Higgs Model (cont’) • Heavy Top Quark of the Left-Right Twin Higgs Model X. Miao, Shufang Su, in preparation. DOE Review, 2006

  28. Research and collaborations - • Collider Study of left-right twin Higgs Model (cont’) • Identify the Twin Higgs Mechanism at Colliders Shufang Su, in preparation. DOE Review, 2006

  29. Research and collaborations - • Distinguish New Physics at Colliders • Left-Right Twin Higgs Model vs. Little Higgs Models heavy top quark, heavy gauge bosons • Left-Right Twin Higgs Model vs. Two-Higgs Doublet Models extra Higgses DOE Review, 2006

  30. Research and collaborations vs. - • Neutralino LSP vs. Sneutrino LSP C. P. Yuan (Michigan State U.) Same signal, different interpretation Can be studied at LHC by DOE Review, 2006

  31. Research and Collaborations - • Propagation of High Energy Charged Slepton M. H. Reno (U. IOWA), I. Sarcevic (UA) • Propagation of Supersymmetric Charged Sleptons at High Energies Mary H. Reno, Ina. Sarcevic, Shufang Su, Astropart. Phys. 24 (2005) 107. DOE Review, 2006

  32. Msl=250 GeV Mwino=250 GeV  earth  ~ ~    earth Long Lived Stau - Gravitino LSP Stau NLSP Albuquerque, Chacko and Burdman (2003) Larger production rate smaller production rate  = 2.197£ 10-6 sec c=659 meter Larger effective detector volume DOE Review, 2006

  33. Radiative Energy Loss:  - Crucial to determine the energy loss of the high energy stau as it traverse the earth • photonuclear • bremstraahlung • pair production DOE Review, 2006

  34. radiative energy loss and stau range - Stau lifetime m=250 GeV m=150 GeV / 1/m / 1/m2 DOE Review, 2006

  35. Activities - • Invited plenary talk at subZ workshop • Neutral Current Overview “From Zero to Z0”, May, 2004, Fermilab. • Invited plenary talk at Aspen winter conference • Gravitino dark matter “The Highest Energy Physics”, February, 2005, Aspen, CO. • Colloquium at University of Wisconsin, Madison • Dark matter May, 2005, Madison, WI. • Invited lecture at Summer Institute 2005 • Dark Matters: WIMP and beyondAugust, 2005, Fujiyoshida, Japan. • Invited lecture at CCAST workshop • Dark matter and collider physics “LHC and Dark Matter”, Dec, 2005, Beijing, China. • Invited talk at Jefferson Lab Hall C workshop • Theory overview on neutral current measurementsAug, 2006, Jefferson Lab. DOE Review, 2006

  36. Organization of conferences/workshops - • From Zero to Z0, a workshop on precision electroweak physics May, 2004, Fermilab • Flavor physics workshop Summer 2008, Kavli Institute in Beijing DOE Review, 2006

  37. Future Directions - • LHC related physics: understand what data really means • QCD issue • Simulation tools for new physics and SM background • Experimental physics observables/ capabilities … • Detector • Interplay between particle physics and cosmology • Determine dark matter properties at colliders • Direct and indirect dark matter detection DOE Review, 2006

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