Related Experiment Video
Updated: Aug 11, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
R parity violation assisted thermal leptogenesis in the seesaw mechanism
1Institute for Studies in Theoretical Physics and Mathematics (IPM), Post Office Box 19395-5531, Tehran, Iran. yasaman@theory.ipm.ac.ir
Abstract:
Successful leptogenesis within the simplest type I supersymmetric seesaw mechanism requires the lightest of the three right-handed neutrino supermultiplets to be heavier than approximately 10(9) GeV. Thermal production of such (s)neutrinos requires very high reheating temperatures which result in an overproduction of gravitinos with catastrophic consequences for the evolution of the Universe. In this Letter, we let R parity be violated through a lambda(i)N(i)H(u)H(d) term in the superpotential, where N(i) are right-handed neutrino supermultiplets. We show that in the presence of this term, the produced lepton-antilepton asymmetry can be enhanced. As a result, even for N1 masses as low as 10(6) GeV or less, we can obtain the observed baryon asymmetry of the Universe without gravitino overproduction.
More Related Videos
Related Concept Videos
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Thomson's e/m Experiment
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
The Pauli Exclusion Principle
Atomic Nuclei: Nuclear Spin State Population Distribution
Second Law of Thermodynamics
Second Law of Thermodynamics

