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
Outline Introduction Extensions of the standard model Additional gauge sectors Ultrahigh-energy cosmic rays Projectiles Hadrons Neutrinos Bound states Conclusion
Extensions of the SM
Extensions of the SM Nature of the Higgs?
Guidance Elementary particles Weak gauge boson masses Superconductivity Meissner-Ochsenfeld effect London penetration depth http://www.magnet.fsu.edu/education/tutorials/magnetacademy/ superconductivity101/images/superconductivity-meissner.jpg
Guidance Elementary particles Weak gauge boson masses Higgs mechanism Standard model Superconductivity Meissner-Ochsenfeld effect London penetration depth Ginzburg-Landau model
Guidance Elementary particles Superconductivity Meissner-Ochsenfeld effect Weak gauge boson masses London penetration depth? Higgs mechanism Ginzburg-Landau model Standard model http://upload.wikimedia.org/wikipedia/commons/7/7b/mexican_hat_potential_polar.svg
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
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
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
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
Technicolor G = SU(2) L U(1) Y SU(3) QCD G TC in hep-ph/0608079 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
DEWSB Technicolour Extended technicolour Topcolour Composite Higgs Little Higgs
Ultrahigh-energy cosmic rays
Air showers
ev 2 ) sr -1 s -1-2 J /(m 3 ( E 10 log LHC Spectrum (all particles) 25 18 18.5 19 19.5 20 20. 24.5 24 23.5 23 E 3 J Auger (ICRC 2011) (E! 1.102 ) Telescope Array (E! 0.906 ) ankle AGASA (E! 0.652 ) origin? Yakutsk (E! 0.561 ) HiRes I (E! 0.911 ) HiRes II (E! 0.903 ) GZK cutoff? 18 18.5 19 19.5 20 20. log (E/eV) 10 composition? adapted from slides by Yoshiki Tsunesada for the Spectrum Working Group at the UHECR 2012 http://indico.cern.ch/getfile.py/access?contribid=6&sessionid=2&resid=0&materialid=slides&confid=152124
QCD prototype & benchmark D.D.Dietrich, arxiv:1206.2400 [hep-ph] hadron cosmic-ray projectile valence quarks air target
QCD prototype & benchmark D.D.Dietrich, arxiv:1206.2400 [hep-ph] cosmic-ray projectile gluon air shower air target
QCD prototype & benchmark D.D.Dietrich, arxiv:1206.2400 [hep-ph] cosmic-ray projectile BFKL air target
HERA saturation momentum https://www.desy.de/h1zeus/combined_results/proton_structure/combined_plots_comp/fig1a.pdf
Techni- D.D.Dietrich, arxiv:1206.2400 [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)
more QCD background D.D.Dietrich, arxiv:1206.2400 [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)
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
heavy lepton Heavy cosmic-ray lepton D.D.Dietrich, arxiv:1206.2400 [hep-ph] projectile extended technigluon ETC BFKL (e.g. ν) air target DGLAP
Heavy D.D.Dietrich, arxiv:1206.2400 [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)
new cosmic-ray bound projectile D.D.Dietrich, arxiv:1206.2400 [hep-ph] air target BFKL DGLAP σ TCx tot σ QCD tot state Λ TC Λ QCD O(10 +2 )
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:?
cosmic-ray projectile DGLAP ETC Outlook: SM projectile on air target BFKL TC bound state larger com energy
Thank you very much for your attention!