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SUMMARY:Chiral anomaly and its implications on primordial magnetic fields 
 and baryogenesis - Kohei Kamada -- IBS\, Daejeon
DTSTART:20181002T150000Z
DTEND:20181002T160000Z
UID:TALK111643@talks.cam.ac.uk
CONTACT:Francesco Coradeschi
DESCRIPTION:Recent observations of TeV blazars by Fermi identified deficit
 s of secondary GeV cascade photons. These observations can be explained by
  intergalactic magnetic fields\, which may have a primordial origin. If th
 e magnetic fields are helical and generated in the early Universe such as 
 before the electroweak symmetry breaking\, nontrivial interaction between 
 (hyper)magnetic fields and other particles can cause some interesting and 
 non negligible phenomena in the early Universe.\nIn this talk\, I will sho
 w that the baryon asymmetry can be generated by the chiral anomaly\, and d
 epending on the detail of electroweak cross over\, baryon asymmetry is not
  completely washed out by the electroweak sphalerons. Thus\, this mechanis
 m can be responsible for the present baryon asymmetry of the Universe. If 
 this mechanism is responsible for the present Universe\, the BSM physics i
 s needed for the generation \nof (hyper)magnetic fields but not for the ba
 ryogenesis. I will also discuss possible mechanism to generate such helica
 l hypermagnetic fields suitable for the baryogenesis scenario.
LOCATION:MR19 (Potter Room\, Pavilion B)\, CMS
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