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Baryogenesis during reheating in natural inflation and comments on spontaneous baryogenesis

- A. Dolgov, K. Freese, R. Rangarajan, M. Srednicki
- Physics
- 18 October 1996

We calculate the baryon asymmetry created by the decay of a pseudo Nambu-Goldstone boson whose interactions violate baryon number conservation. Our results are in disagreement with previous results… Expand

Cosmological constraints on the scale of supersymmetry breaking

- R. Rangarajan
- Physics
- 19 July 1994

Abstract We consider the cosmological and astrophysical constraints on the decay of massive E 8 × E 8 ′ superstring axions associated with the hidden sector. We find that decay lifetimes greater than… Expand

New supersymmetric contributions to t-->cV

- J. Lopez, D. Nanopoulos, R. Rangarajan
- Physics
- 16 February 1997

We calculate the electroweak-like one-loop supersymmetric contributions to the rare and flavor-violating decay of the top quark into a charm quark and a gauge boson: $t->c V$, with $V=\gamma,Z,g$. We… Expand

Effective chemical potential in spontaneous baryogenesis

- A. Dasgupta, R. K. Jain, R. Rangarajan
- Physics
- 12 August 2018

Models of spontaneous baryogenesis have an interaction term $\partial_\mu\theta j^\mu_B$ in the Lagrangian, where $j^\mu_B$ is the baryonic current and $\theta$ can be a pseudo-Nambu-Goldstone boson.… Expand

The Angular dependence of the three point correlation function of the cosmic microwave background radiation as predicted by inflationary cosmologies

- T. Falk, R. Rangarajan, M. Srednicki
- Physics
- 4 August 1992

Inflationary models predict a definite, model-independent, angular dependence for the three-point correlation function of ΔT/T at large angles (≥1°) which we calculate. The overall amplitude is model… Expand

Power spectrum generated during inflation

- M. Bastero-Gil, A. Berera, N. Mahajan, R. Rangarajan
- Physics
- 13 February 2013

Recently there have been differing viewpoints on how to evaluate the curvature power spectrum generated during inflation. Since the primordial curvature power spectrum is the seed for structure… Expand

Perturbative reheating and gravitino production in inflationary models

- R. Rangarajan, N. Sahu
- Physics
- 12 November 2008

The low reheat temperature at the end of inflation from the gravitino bound constrains the creation of heavy Majorana neutrinos associated with models of leptogenesis. However, a detailed view of the… Expand

GRAVITINO PRODUCTION IN AN INFLATIONARY UNIVERSE AND IMPLICATIONS FOR LEPTOGENESIS

- R. Rangarajan, N. Sahu
- Physics
- 21 June 2006

Models of leptogenesis are constrained by the low reheat temperature at the end of reheating associated with the gravitino bound. However, a detailed view of reheating, in which the maximum… Expand

Falsifying leptogenesis for a TeV scale W R at the LHC

- Mansi Dhuria, C. Hati, R. Rangarajan, U. Sarkar
- Physics
- 24 March 2015

We point out that the discovery of a right-handed charged gauge boson $W_R^\pm$ with mass of around a few TeV, for example through a signal of two leptons and two jets that has been reported by CMS… Expand

Electroweak baryogenesis in a cold universe

- R. Rangarajan, S. Sengupta, +4 authors India.
- Physics
- 25 November 1999

Abstract We discuss the possibility of generating the baryon asymmetry of the Universe when the temperature of the Universe is much below the electroweak scale. As discussed by Nagatani recently the… Expand

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