Axion

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Axions as Pseudo Nambu-Goldstone Bosons Georg Raffelt, Max-Planck-Institut für Physik, München, Germany PONT d‘Avignon, 21-25 April 2008, Avignon, France • The realization of the Peccei-Quinn mechanism involves a new chiral U(1) symmetry, spontaneously broken at a scale f a • Axions are the corresponding Nambu-Goldstone mode E ≈ f a V(a) • U PQ (1) spontaneously broken • Higgs field settles in “Mexican hat” a E ≈ Λ QCD ≪ f a V(a) • U PQ (1) explicitly broken by instanton effects • Mexican hat tilts • Axions acquire a mass _ Θ=0 a
Series of Papers on Axion Cosmology in PLB 120 (1983) Georg Raffelt, Max-Planck-Institut für Physik, München, Germany PONT d‘Avignon, 21-25 April 2008, Avignon, France Page 127
Page 1 and 2: Georg G. Raffelt, Max-Planck Planck
Page 3 and 4: Georg Raffelt, Max-Planck-Institut
Page 5 and 6: Peccei-Quinn Mechanism Proposed in
Page 17: Supernova 1987A Energy-Loss Argumen
Page 21 and 22: Series of Papers on Axion Cosmology
Page 23 and 24: Production of Cold Axion Population
Page 27 and 28: Axion Hot Dark Matter from Thermali
Page 29 and 30: Axion Hot Dark Matter Limits from P
Page 31 and 32: Experimental Tests of the Invisible
Page 43 and 44: Results and Plans of Tokyo Axion He
Page 45 and 46: LHC Magnet Mounted as a Telescope t
Page 53 and 54: Dimming of Supernovae without Cosmi
Page 59: Technological Applications of PVLAS

Axion

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