1 / 36

GAUGE MODEL OF UNPARTICLES Discovering the Unexpected

GAUGE MODEL OF UNPARTICLES Discovering the Unexpected. Gennady A. Kozlov Bogolyubov Laboratory of Theoretical Physics JINR, Dubna. Mediators, M. SM, m. CFT, m=0. The very high energy theory contains the fields of the SM and Banks-Zaks fields of a theory with a nontrivial IR fixed point.

evonne
Download Presentation

GAUGE MODEL OF UNPARTICLES Discovering the Unexpected

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. GAUGE MODEL OF UNPARTICLESDiscovering the Unexpected Gennady A. Kozlov Bogolyubov Laboratory of Theoretical Physics JINR, Dubna

  2. GA Kozlov

  3. GA Kozlov

  4. GA Kozlov

  5. Mediators, M SM, m CFT, m=0 GA Kozlov

  6. GA Kozlov

  7. The very high energy theory contains the fields of the SM and Banks-Zaks fields of a theory with a nontrivial IR fixed point. GA Kozlov

  8. CONFORMAL INVARIANCE At the quantum level, dimensionless couplings depend on scale: renormalization group evolution QEDQCD are not conformal theories g g Q Q GA Kozlov

  9. g Q GA Kozlov

  10. GA Kozlov

  11. CONFORMAL Symmetry Breaking & High energy scale g Q LU M • Unparticle physics is only possible in the conformal window • Width of this window depends on 3 characteristic scales: -Hidden sector couples at M • Conformal - EWSB CSB at GA Kozlov

  12. UNPARTICLE PHASE SPACE • The density of unparticle final states is the spectral density • Scale invariance  • This is similar to the phase space for n massless particles: • “Unparticle” with dU = 1 is a massless particle. “Unparticles” with some other dimension dU look like a non-integral number dU of massless particles Georgi (2007) GA Kozlov

  13. GA Kozlov

  14. TOP-quark DECAY Georgi (2007) • For dU 1, recover 2-body decay kinematics, monoenergetic u- jet. • For dU > 1, however, get continuum of energies; unparticle does not have a definite mass Consider t  u U decay through GA Kozlov

  15. TOP-quark DECAY Georgi (2007) • For dU 1, recover 2-body decay kinematics, monoenergetic u- jet. • For 2>dU > 1, however, get continuum of energies; unparticle does not have a definite mass Consider t  u U decay through GA Kozlov

  16. 3 POINT COUPLINGS • E.g., LHC: gg  O  O O  gggg • Rate controlled by value of the (strong) coupling, constrained only by experiment • Many possibilities: ggZZ, ggee, ggmm, … Photon pT 3-point coupling is determined, up to a constant, by conformal invariance: GA Kozlov

  17. GA Kozlov

  18. UNPARTICLE INTERACTIONS • Interactions depend on the dimension of the unparticle operator and whether it is scalar, vector, tensor, … • Super-renormalizable couplings: Most important (model will follow) GA Kozlov

  19. GA Kozlov

  20. GA Kozlov

  21. GA Kozlov

  22. GA Kozlov

  23. GA Kozlov

  24. GA Kozlov

  25. GA Kozlov

  26. GA Kozlov

  27. GA Kozlov

  28. GA Kozlov

  29. GA Kozlov

  30. GA Kozlov

  31. GA Kozlov

  32. GA Kozlov

  33. GA Kozlov

  34. GA Kozlov

  35. GA Kozlov

  36. SUMMARY. For experimentalists Unparticles:conformal energy window implies high energy colliders are the most useful machines Real unparticle production  missing energy As for of the SM particles is concerned, - staff production looks the same as production of massless particles Multi-unparticle production  spectacular signals Virtual unparticle production  rare processes Unparticles:Quite distinguishable from other HE physics through own specific kinematic properties GA Kozlov

More Related