Skip navigation

Main Menu

Global Menu

Activities

Search

Seminars

Seminars

seminar view

Seminar View

Seminar
FIELD Phys:Particle Physics
DATE December 07 (Fri), 2018
TIME 13:00-14:00
PLACE 1424
SPEAKER Arnab Dasgupta
HOST Chun, Eung Jin
INSTITUTE Seoul Tech
TITLE Effective chemical potential in spontaneous baryogenesis
ABSTRACT

Models of spontaneous baryogenesis have an interaction term ∂μθjμB in the Lagrangian, where jμB is the baryonic current and θ can be a pseudo-Nambu-Goldstone boson. Since the time component of this term, θ˙j0B, equals θ˙nB for a spatially homogeneous current, it is usually argued that this term implies a splitting in the energy of baryons and antibaryons thereby providing an effective chemical potential for baryon number. In thermal equilibrium, one {then obtains} nB∼θ˙T2. We, however, argue that a term of this form in the Lagrangian does not contribute to the single particle energies of baryons and antibaryons. We show this for both fermionic and scalar baryons. But, similar to some recent work, we find that despite the above result the baryon number density obtained from a Boltzmann equation analysis can be proportional to θ˙T2. Our arguments are very different from that in the standard literature on spontaneous baryogenesis.

FILE  
  • list

Seminar List

 

Subject

keyword

date

~