58 citations · 223 across the 16 of their papers we have counts for
16 papers
: Simplify Massive Spinor Helicity
Aakash Kumar, Arnab Rudra, Rahul Shaw
We present , a package to do spinor helicity computations in four spacetime dimensions $\href{https://github.com/aakash-kmr/SMaSH}{\text{(git…
Compton amplitude and Contact term(s) in the Spinor Helicity formalism
Aakash Kumar, Arnab Rudra, Rahul Shaw
In gauge theories, contact terms play an important role in ensuring gauge invariance. In the spinor-helicity formalism, the choice of a gauge-fixing condition manifests itself in t…
Compton amplitude for massive bosons of arbitrary spin
Aakash Kumar, Arnab Rudra, Manav Shah +1
In this work, we write down an analytic expression of electromagnetic tree-level Compton amplitude for a completely symmetric traceless (bosonic) higher spin particle in any dimens…
Three point interaction of Dirac fermions with higher spin particles and discrete symmetries
Kushal Chakraborty, Aakash Kumar, Arnab Rudra +1
We constructed all possible kinematically allowed three-point interactions of two massless Dirac spinors with massive higher-spin bosons. In any spacetime, the interactions hav…
On-shell Supersymmetry and higher-spin amplitudes
Mahesh K. N. Balasubramanian, Kushal Chakraborty, Arnab Rudra +1
We use on-shell Supersymmetry to constrain the three-point function of two massless particles and one massive particle in 3+1 dimensions. We use this information to write down the…
Equivalence of JT Gravity and Near-extremal Black Hole Dynamics in Higher Derivative Theory
Nabamita Banerjee, Taniya Mandal, Arnab Rudra +1
Two derivative Jackiw Teitelboim gravity theory captures the near horizon dynamics of higher dimensional near extremal black holes, which is governed by a Schwarzian action at the…
Spinning amplitudes from scalar amplitudes
Mahesh KN Balasubramanian, Raj Patil, Arnab Rudra
We provide a systematic method to compute tree-level scattering amplitudes with spinning external states from amplitudes with scalar external states in arbitrary spacetime dimensio…
Renormalisation in Open Quantum Field theory II: Yukawa theory and PV reduction
Avinash, Chandan Jana, Arnab Rudra
We compute Passarino-Veltman (PV) reduction for tensor loop integrals, that appear in open field theories. We apply these results to open-Yukawa theory and compute the self-energy…
APS -invariant, path integrals, and mock modularity
Atish Dabholkar, Diksha Jain, Arnab Rudra
We show that the Atiyah-Patodi-Singer -invariant can be related to the temperature dependent Witten index of a noncompact theory and give a new proof of the APS theorem using sc…
Leading soft theorem for multiple gravitini
Diksha Jain, Arnab Rudra
We compute leading soft theorem for multiple gravitinos (and graviton) in an arbitrary theory of supergravity with an arbitrary number of finite energy particles with arbitrary mas…
Renormalization in Open Quantum Field theory I: Scalar field theory
Avinash, Chandan Jana, R. Loganayagam +1
While the notion of open quantum systems is itself old, most of the existing studies deal with quantum mechanical systems rather than quantum field theories. After a brief review o…
Exploring Perturbative Conformal Field Theory in Mellin space
Amin A. Nizami, Arnab Rudra, Sourav Sarkar +1
We explore the Mellin representation of correlation functions in conformal field theories in the weak coupling regime. We provide a complete proof for a set of Feynman rules to wri…
Type I/heterotic duality and M-theory amplitudes
Michael B. Green, Arnab Rudra
This paper investigates relationships between low-energy four-particle scattering amplitudes with external gauge particles and gravitons in the E_8 X E_8 and SO(32) heterotic strin…
String Perturbation Theory Around Dynamically Shifted Vacuum
Roji Pius, Arnab Rudra, Ashoke Sen
In some string theories, e.g. SO(32) heterotic string theory on Calabi-Yau manifolds, a massless field with a tree level potential can acquire a tachyonic mass at the one loop leve…
Mass Renormalization in String Theory: General States
Roji Pius, Arnab Rudra, Ashoke Sen
In a previous paper we described a procedure for computing the renormalized masses and S-matrix elements in bosonic string theory for a special class of massive states which do not…
Mass Renormalization in String Theory: Special States
Roji Pius, Arnab Rudra, Ashoke Sen
String theory gives a well defined procedure for computing the S-matrix of BPS or a class of massless states, but similar calculation for general massive states is plagued with dif…