162 citations · 1.4k across the 30 of their papers we have counts for
30 papers
Asymptotic Weyl Double Copy
Hadi Godazgar, Mahdi Godazgar, Ricardo Monteiro +2
A characteristic value formulation of the Weyl double copy leads to an asymptotic formulation. We find that the Weyl double copy holds asymptotically in cases where the full soluti…
The Weyl Double Copy for Gravitational Waves
Hadi Godazgar, Mahdi Godazgar, Ricardo Monteiro +2
We establish the status of the Weyl double copy relation for radiative solutions of the vacuum Einstein equations. We show that all type N vacuum solutions, which describe the radi…
ANEC in theory
Teresa Bautista, Lorenzo Casarin, Hadi Godazgar
Motivated by the goal of applying the average null energy condition (ANEC) to renormalisation group flows, we calculate in theory the expectation value of the ANEC operator…
Hamiltonian derivation of dual gravitational charges
Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perry
We provide a Hamiltonian derivation of recently discovered dual BMS charges. In order to do so, we work in the first order formalism and add to the usual Palatini action, the Holst…
Asymptotic gravitational charges
Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perry
We present a method for finding, in principle, all asymptotic gravitational charges. The basic idea is that one must consider all possible contributions to the action that do not a…
Taub-NUT from the Dirac monopole
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
Writing the metric of an asymptotically flat spacetime in Bondi coordinates provides an elegant way of formulating the Einstein equation as a characteristic value problem. In this…
Lorentzian CFT 3-point functions in momentum space
Teresa Bautista, Hadi Godazgar
In a conformal field theory, two and three-point functions of scalar operators and conserved currents are completely determined, up to constants, by conformal invariance. The expre…
Dual gravitational charges and soft theorems
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
We consider the consequences of the dual gravitational charges for the phase space of radiating modes, and find that they imply a new soft NUT theorem. In particular, we argue that…
New dual gravitational charges
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
We show that there are a further infinite number of, previously unknown, supertranslation charges. These can be viewed as duals of the known BMS charges corresponding to supertrans…
Tower of subleading dual BMS charges
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
We supplement the recently found dual gravitational charges with dual charges for the whole BMS symmetry algebra. Furthermore, we extend the dual charges away from null infinity, d…
Conformal Anomaly for Non-Conformal Scalar Fields
Lorenzo Casarin, Hadi Godazgar, Hermann Nicolai
We give a general definition of the conformal anomaly for theories that are not classically Weyl invariant and show that this definition yields a quantity that is both finite and l…
Subleading BMS charges and fake news near null infinity
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
In this paper we establish a relation between the non-linearly conserved Newman-Penrose charges and certain subleading terms in a large- expansion of the BMS charges in an asymp…
A rederivation of the conformal anomaly for spin-1/2
Hadi Godazgar, Hermann Nicolai
We rederive the conformal anomaly for spin-1/2 fermions by a genuine Feynman graph calculation, which has not been available so far. Although our calculation merely confirms a resu…
Aretakis Charges and Asymptotic Null Infinity
Hadi Godazgar, Mahdi Godazgar, C. N. Pope
We construct a relation between the Aretakis charge of any extreme black hole and the Newman-Penrose charge. This is achieved by constructing a conformal correspondence between ext…
Conformal anomalies and the Einstein Field Equations
Hadi Godazgar, Krzysztof A. Meissner, Hermann Nicolai
We compute corrections to the Einstein field equations which are induced by the anomalous effective actions associated to the type A conformal anomaly, both for the (non-local) Rie…
The Embedding of Gauged STU Supergravity in Eleven Dimensions
Arash Azizi, Hadi Godazgar, Mahdi Godazgar +1
The consistency of the embedding of four-dimensional SO(8) gauged N=8 supergravity into eleven-dimensional supergravity, where the internal directions are compactified on a seven-s…
Hawking radiation and secularly growing loop corrections
Emil T. Akhmedov, Hadi Godazgar, Fedor K. Popov
We study the expectation value of the energy momentum tensor during thin shell collapse for a massive, real, scalar field theory. At tree-level, we find thermal, Hawking-type, beha…
Consistent 4-form fluxes for maximal supergravity
Hadi Godazgar, Mahdi Godazgar, Olaf Krueger +1
We derive new ansaetze for the 4-form field strength of D=11 supergravity corresponding to uplifts of four-dimensional maximal gauged supergravity. In particular, the ansaetze dire…
An SO(3)SO(3) invariant solution of supergravity
Hadi Godazgar, Mahdi Godazgar, Olaf Krueger +2
We construct a new SO(3)SO(3) invariant non-supersymmetric solution of the bosonic field equations of supergravity from the corresponding stationary point of maximal…
Supersymmetric E Exceptional Field Theory
Hadi Godazgar, Mahdi Godazgar, Olaf Hohm +2
We give the supersymmetric extension of exceptional field theory for E, which is based on a -dimensional generalized spacetime subject to a covariant constraint. T…
Einstein-Cartan Calculus for Exceptional Geometry
Hadi Godazgar, Mahdi Godazgar, Hermann Nicolai
In this paper we establish and clarify the link between the recently found E7 generalised geometric structures, which are based on the SU(8) invariant reformulation of D=11 supergr…
The embedding tensor of Scherk-Schwarz flux compactifications from eleven dimensions
Hadi Godazgar, Mahdi Godazgar, Hermann Nicolai
We study the Scherk-Schwarz reduction of D=11 supergravity with background fluxes in the context of a recently developed framework pertaining to D=11 supergravity. We derive the em…
Non-linear Kaluza-Klein theory for dual fields
Hadi Godazgar, Mahdi Godazgar, Hermann Nicolai
We present non-linear uplift ansaetze for all the bosonic degrees of freedom and dual fields in the 7-sphere reduction of D=11 supergravity to maximal SO(8) gauged supergravity and…
Generalised geometry from the ground up
Hadi Godazgar, Mahdi Godazgar, Hermann Nicolai
Extending previous work on generalised geometry, we explicitly construct an E7-valued vielbein in eleven dimensions that encompasses the scalar bosonic degrees of freedom of D=11 s…