Speaker
Dr
Suratna Das
(INSPIRE Faculty)
Description
Abstract: Recent observational developments in the fields of high energy physics and cosmology have set some new challenges in their respective fields. Observation of 125 GeV mass Higgs boson has raised the concern about the instability of electroweak vacuum around $10^{10}$ GeV whereas observations by BICEP2, if turns out to be correct, would set the inflationary scale surprisingly close to the GUT scale. In this talk we would extend the Standard model by a $U(1)_{B-L}$ symmetry group where the real part of the $U(1)_{B-L}$ scalar would play the role of inflaton. We would show how a radiatively corrected inflaton quartic potential would produce viable observational signatures for cosmology and how the low inflaton mass would yield a threshold correction to SM Higgs quartic coupling which would naturally cure the instability problem of the electroweak vacuum.
Author
Dr
Suratna Das
(INSPIRE Faculty)
Co-authors
Dr
Joydeep Chakrabortty
(INSPIRE Faculty)
Dr
Kaushik Bhattacharya
(Assosiate Professor)
Mr
Tanmoy Mondal
(Ph.D. Scholar)
