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SUMMARY:Baryogenesis and Dark Matter from B Mesons - Miguel Escudero (King
 's College\, London)
DTSTART:20190509T150000Z
DTEND:20190509T160000Z
UID:TALK122365@talks.cam.ac.uk
CONTACT:Joseph Davighi
DESCRIPTION:In this talk\, based on arXiv:1810.00880\, I will present a ne
 w mechanism of Baryogenesis and dark matter production in which both the d
 ark matter relic abundance and the baryon asymmetry arise from neutral B m
 eson oscillations and subsequent decays.\n\nIn the early Universe\, decays
  of a long lived particle produce B mesons and anti-mesons out of thermal 
 equilibrium. These mesons/anti-mesons then undergo CP violating oscillatio
 ns before quickly decaying into visible and dark sector particles. Dark ma
 tter will be charged under Baryon number so that the visible sector baryon
  asymmetry is produced without violating the total baryon number of the Un
 iverse. The produced baryon asymmetry will be directly related to the lept
 onic charge asymmetry in neutral B decays\; an experimental observable. Da
 rk matter is stabilized by an unbroken discrete symmetry\, and proton deca
 y is simply evaded by kinematics.\n\nIf this mechanism is the responsible 
 one for generating the observed baryon asymmetry and dark matter abundance
  we observe today\, it would lead to distinctive experimental signatures:\
 n\n1) a large branching fraction of B mesons into a baryon and missing ene
 rgy (> 10^-4^)\n\n2) a positive semileptonic asymmetry in neutral B meson 
 decays (> 10^-5^)\n\n3) a large branching fraction of b-flavored Baryons i
 nto mesons and missing energy (> 10^-4^)\n\nThese unique collider signatur
 es are testable at current collider experiments\, like the LHC and Belle-I
 I\, allowing for a distinct probe of this mechanism.
LOCATION:Ryle Seminar Room no. 930\, Rutherford Building\, Cavendish Labor
 atory
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