80 citations · 207 across the 14 of their papers we have counts for
16 papers
Doubly-scaled planar SYM & Carroll Holography
Arjun Bagchi, Prateksh Dhivakar, Alok Laddha +1
In their seminal paper, Okuda and Penedones (OP) put forward an intriguing proposal towards holography in asymptotically flat spacetimes (AFS). They showed that the flat space limi…
All invariant gluon OPEs on the celestial sphere
Shamik Banerjee, Raju Mandal, Sagnik Misra +2
algebra is an infinite dimensional Lie algebra which is known to be the symmetry algebra of some gauge theories. It is a "coloured version" of the . In this paper…
Celestial OPE in Self Dual Gravity
Shamik Banerjee, Harshal Kulkarni, Partha Paul
In this paper we compute the celestial operator product expansion between two outgoing positive helicity gravitons in the self dual gravity. It has been shown that the self dual gr…
Asymmetric long-lived dark matter and leptogenesis from type-III seesaw framework
Satyabrata Mahapatra, Partha Kumar Paul, Narendra Sahu +1
We propose a simple model in the type-III seesaw framework to explain the neutrino mass, asymmetric dark matter (ADM), and baryon asymmetry of the Universe. We extend the standard…
An infinite family of invariant theories on the celestial sphere
Shamik Banerjee, Harshal Kulkarni, Partha Paul
In this note we determine the graviton-graviton OPE and the null states in any symmetric theory on the celestial sphere. Our analysis shows that there exists a discr…
MHV Gluon Scattering in the Massive Scalar Background and Celestial OPE
Shamik Banerjee, Raju Mandal, Akavoor Manu +1
In this paper we study the OPE between two positive helicity outgoing gluons in the celestial CFT for the Yang-Mills theory chirally coupled to a massive scalar background. This th…
Connecting dark matter, baryogenesis and neutrinoless double beta decay in a based 2HDM
Lavina Sarma, Partha Kumar Paul, Mrinal Kumar Das
In this paper, we discuss the impact of neutrino phenomenology and related cosmology on an symmetric 2HDM along with an addition of a new particle, i.e. a g…
symmetry of gravity
Nishant Gupta, Partha Paul, Nemani V. Suryanarayana
We propose novel asymptotically locally flat boundary conditions for Einstein Gravity without cosmological constant in four dimensions that are consistent with the variational prin…
(Chiral) Virasoro invariance of the tree-level MHV graviton scattering amplitudes
Shamik Banerjee, Sudip Ghosh, Partha Paul
In this paper we continue our study of the tree level MHV graviton scattering amplitudes from the point of view of celestial holography. In arXiv:2008.04330 we showed that the cele…
Cosmological singularities, entanglement and quantum extremal surfaces
A. Manu, K. Narayan, Partha Paul
We study aspects of entanglement and extremal surfaces in various families of spacetimes exhibiting cosmological, Big-Crunch, singularities, in particular isotropic Kasner. T…
MHV Graviton Scattering Amplitudes and Current Algebra on the Celestial Sphere
Shamik Banerjee, Sudip Ghosh, Partha Paul
The Cachazo-Strominger subleading soft graviton theorem for a positive helicity soft graviton is equivalent to the Ward identities for currents. This n…
Cosmological singularities and 2-dimensional dilaton gravity
Ritabrata Bhattacharya, K. Narayan, Partha Paul
We study Big-Bang or -Crunch cosmological singularities in 2-dimensional dilaton-gravity-scalar theories, in general obtained by dimensional reduction of higher dimensional theorie…
Conformal properties of soft-operators - 1 : Use of null-states
Shamik Banerjee, Pranjal Pandey, Partha Paul
Soft-operators, loosely speaking, are operators which create or annihilate zero energy massless particles on the celestial sphere in Minkowski space. The Lorentz group acts on the…
On Late Time Tails in an Extreme Reissner-Nordström Black Hole: Frequency Domain Analysis
Srijit Bhattacharjee, Bidisha Chakrabarty, David D. K. Chow +2
In this brief note, we revisit the study of the leading order late time decay tails of massless scalar perturbations outside an extreme Reissner-Nordström black hole. Previous auth…
Linearized Einstein's Equation around pure BTZ from Entanglement Thermodynamics
Partha Paul, Pratik Roy
It is known that the linearized Einstein's equation around the pure can be obtained from the constraint , known as the first law of entanglement, on…
Black Hole Singularity, Generalized (Holographic) -Theorem and Entanglement Negativity
Shamik Banerjee, Partha Paul
In this paper we revisit the question that in what sense empty black brane geometry can be thought of as RG-flow. We do this by first constructing a holographic -funct…