UHECR and extensions of the Standard Model

Transcription

1 UHECR and extensions of the Standard Model DENNIS D. DIETRICH Goethe-Universität, Frankfurt am Main Higgs Centre for Theoretical Physics University of Edinburgh September 25, 2013

2 Outline Introduction Extensions of the standard model Additional gauge sectors Ultrahigh-energy cosmic rays Projectiles Hadrons Neutrinos Bound states Conclusion

3 Extensions of the SM

4 Extensions of the SM Nature of the Higgs?

5 Guidance Elementary particles Weak gauge boson masses Superconductivity Meissner-Ochsenfeld effect London penetration depth superconductivity101/images/superconductivity-meissner.jpg

6 Guidance Elementary particles Weak gauge boson masses Higgs mechanism Standard model Superconductivity Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model

7 Guidance Elementary particles Superconductivity Meissner-Ochsenfeld effect Weak gauge boson masses London penetration depth? Higgs mechanism Ginzburg-Landau model Standard model

8 Guidance Elementary particles Weak gauge boson masses Higgs mechanism Standard model Superconductivity Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model Bardeen-Cooper-Schrieffer Cooper-pair condensate phonons

9 Guidance Elementary particles Superconductivity Gedanken experiment Weak gauge boson masses Higgs mechanism Standard model Standard model w/o Higgs sector Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model Bardeen-Cooper-Schrieffer Cooper pair condensate phonons

10 Guidance Elementary particles Weak gauge boson masses Higgs mechanism Standard model QCD Superconductivity Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model Bardeen-Cooper-Schrieffer chiral condensate Cooper-pair condensate gluons phonons

11 Dictionary Elementary particles Weak gauge boson masses Higgs mechanism Standard model Technicolor Superconductivity Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model Bardeen-Cooper-Schrieffer techniquark condensate Cooper-pair condensate technigluons phonons

12 Technicolor G = SU(2) L U(1) Y SU(3) QCD G TC in hep-ph/ Witten anomaly? f π }{{} O(10 2 MeV) Λ ew }{{} O(10 2 GeV) π ±, π 0 Π ± W ± L Π 0 Z 0 L

13 DEWSB Technicolour Extended technicolour Topcolour Composite Higgs Little Higgs

14 Ultrahigh-energy cosmic rays

15 Air showers

16 ev 2 ) sr -1 s -1-2 J /(m 3 ( E 10 log LHC Spectrum (all particles) E 3 J Auger (ICRC 2011) (E! ) Telescope Array (E! ) ankle AGASA (E! ) origin? Yakutsk (E! ) HiRes I (E! ) HiRes II (E! ) GZK cutoff? log (E/eV) 10 composition? adapted from slides by Yoshiki Tsunesada for the Spectrum Working Group at the UHECR

17 QCD prototype & benchmark D.D.Dietrich, arxiv: [hep-ph] hadron cosmic-ray projectile valence quarks air target

18 QCD prototype & benchmark D.D.Dietrich, arxiv: [hep-ph] cosmic-ray projectile gluon air shower air target

19 QCD prototype & benchmark D.D.Dietrich, arxiv: [hep-ph] cosmic-ray projectile BFKL air target

20 HERA saturation momentum

21 Techni- D.D.Dietrich, arxiv: [hep-ph] cosmic-ray projectile air target techniquarks technigluons DGLAP BFKL DGLAP σ TC tot σ QCD tot σ TC tot σ QCD tot colour O(10 3 ) Λ TC Λ QCD O(1)

22 more QCD background D.D.Dietrich, arxiv: [hep-ph] cosmic-ray projectile air target top antitop σ TC tot σ QCD+t t tot σ TC tot σ QCD+t t tot Λ TC 2m t O(1) O(1)

23 Fast forward Technicolour (kicks in around ankle) 3 rd generation ETC few TeV Topcolour - if unification w/ SU(3)QCD small coupling Composite Higgs ξ=(v/f) 2 1 TC limit requires UV completion to judge in detail Little Higgs - heavy SU(2) 2TeV SU(2)L - coupling to weak

24 heavy lepton Heavy cosmic-ray lepton D.D.Dietrich, arxiv: [hep-ph] projectile extended technigluon ETC BFKL (e.g. ν) air target DGLAP

25 Heavy D.D.Dietrich, arxiv: [hep-ph] cosmic-ray projectile Higgs top antitop Yukawa BFKL lepton (e.g. ν) σ TCν tot σ QCDν tot O(1) air target DGLAP σ TCν tot σ QCDν tot Λ TC 2m t O(1)

26 new cosmic-ray bound projectile D.D.Dietrich, arxiv: [hep-ph] air target BFKL DGLAP σ TCx tot σ QCD tot state Λ TC Λ QCD O(10 +2 )

27 Conclusion hadron or heavy lepton projectiles: TC & QCD with top similarly hard must look at details of shower (statistics?!) new bound state projectile TC harder than QCD even with top does not see GZK cut off in any case if GZK for hadrons: stability bound for bound state impact on viability as dark matter? if only limit of accelerator:?

28 cosmic-ray projectile DGLAP ETC Outlook: SM projectile on air target BFKL TC bound state larger com energy

29 Thank you very much for your attention!