32 citations · 98 across the 17 of their papers we have counts for
17 papers
Chiral dark matter and radiative neutrino masses from gauged U(1) symmetry
K. S. Babu, Shreyashi Chakdar, Vishnu P. K
We propose a class of dark matter models based on a chiral gauge symmetry acting on a dark sector. The chiral protects the masses of the dark sector fermions, and als…
FIMP Dark Matter from Flavon Portals
K. S. Babu, Shreyashi Chakdar, Nandini Das +2
We investigate the phenomenology of a non-thermal dark matter (DM) candidate in the context of flavor models that explain the hierarchy in the masses and mixings of quarks and lept…
A model of light pseudoscalar dark matter
Shreyashi Chakdar, Dilip Kumar Ghosh, P. Q. Hung +2
The EW- model was constructed in order to provide a seesaw scenario operating at the Electroweak scale GeV, keeping the same SM gauge structure. In this mode…
Prospect of the Electroweak Scale Right-handed neutrino model in the Lifetime Frontier
Shreyashi Chakdar, P. Q Hung
Motivated by the null results of the BSM searches in the post-Higgs era of the LHC, our current approach is to look for new physics shifting from theory driven search strategies to…
A Symmetric Two Higgs Doublet Model
Hannah Bossi, Shreyashi Chakdar
After the discovery of a SM-like scalar state with mass of 125 GeV in 2012, the electroweak sector demands to be studied with all possible theoretical and experimental efforts. In…
The search for electroweak-scale right-handed neutrinos and mirror charged leptons through like-sign dilepton signals
Shreyashi Chakdar, K. Ghosh, V. Hoang +2
The existence of tiny neutrino masses at a scale more than a million times smaller than the lightest charged fermion mass, namely the electron, and their mixings can not be explain…
New Physics at the TeV Scale
Shreyashi Chakdar
The Standard Model of particle physics is assumed to be a low-energy effective theory with new physics theoretically motivated to be around TeV scale. The dissertation presents the…
Superworld without Supersymmetry
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi
It is a possibility that the superworld (supersymmetric partners of our world) does exist without supersymmetry. The two worlds are being distinguished by an unbroken discrete $Z_2…
Warm Dark Matter in Two Higgs Doublet Models
K. S. Babu, Shreyashi Chakdar, Rabindra N. Mohapatra
We show that a neutral scalar field, σ, of two Higgs doublet extensions of the Standard Model incorporating the seesaw mechanism for neutrino masses can be identified as a consiste…
Dark Matter, Parallel Universe and Multiple Higgs Signals at the ILC
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi
The existence of dark matter is now well established by several indirect experiments. Several candidates for dark matter has also been proposed. However, the dark matter can just b…
A model for Dirac neutrino mass matrix with only four parameters
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi
The exchange symmetry between the muon neutrino and the tau neutrino for the neutrino mass matrix has been very useful in understanding the near maximal atmospheric neutrino mixing…
A predictive model of Dirac Neutrinos
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi
Assuming lepton number conservation, hermiticity of the neutrino mass matrix and exchange symmetry, we show that we can determine the neutrino mass matrix completely fr…
Parallel Universe, Dark Matter and Invisible Higgs Decays
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi
The existence of the dark matter with amount about five times the ordinary matter is now well established experimentally. There are now many candidates for this dark matter. Howeve…
Non-universal SUGRA at LHC: Prospects and Discovery Potential
Subhaditya Bhattacharya, Shreyashi Chakdar, Kirtiman Ghosh +1
We explore supersymmetry (SUSY) parameter space with non-universal high scale parameters in gravity mediated SUSY breaking (SUGRA) scenario that accommodates a Higgs mass of (125$\…
Collider signatures of mirror fermions in the framework of Left Right Mirror Model
Shreyashi Chakdar, Kirtiman Ghosh, S. Nandi +1
The idea of left-right symmetry with mirror fermions is very appealing from the symmetry point of view. In this picture, unlike the Standard Model, the symmetry is not only left-ri…
Top SU(5) Models: Baryon and Lepton Number Violating Resonances at the LHC
Shreyashi Chakdar, Tianjun Li, S. Nandi +1
We propose the minimal and renormalizable non-supersymmetric top SU(5) models where the gauge symmetry is broken down to the S…
Unity of elementary particles and forces for the third family
Shreyashi Chakdar, Tianjun Li, S. Nandi +1
We propose a non-supersymmetric SU(5) model in which only the third family of fermions are unified. The model remedies the non-unification of the three Standard Model couplings in…