111 citations · 231 across the 17 of their papers we have counts for
17 papers
A field-inspired derivation of open string amplitudes
Humberto Gomez, Renann Lipinski Jusinskas, Sitender Pratap Kashyap
We propose a new method for computing -point tree-level open string amplitudes, inspired by the field-theoretical perturbiner framework and bypassing world-sheet moduli integrat…
Two point amplitude for closed superstrings
Sitender Pratap Kashyap
We present a prescription for computing the tree-level two-point amplitude of closed strings in the pure spinor superstring formalism, thereby completing the analysis of such super…
Tension between string amplitude prescriptions with presumed spacetime supersymmetry
Thales Azevedo, Alessandro Georgoudis, Renann Lipinski Jusinskas +1
We analyze an alternative prescription for computing tree level scattering amplitudes in the pure spinor superstring. Proposed by Berkovits, and inspired by an earlier work by Lee…
Massless representation of massive superfields and tree amplitudes with the pure spinor formalism
Sitender Pratap Kashyap, Carlos R. Mafra, Mritunjay Verma +1
We construct the unintegrated vertex operator at the first mass level of the open superstring from the OPE of massless vertices. Using BRST cohomology manipulations, the tree ampli…
de Sitter Teukolsky waves
Harsh, Sk Jahanur Hoque, Sitender Pratap Kashyap +1
We present de Sitter Teukolsky waves -- linearised quadrupolar gravitational waves in the transverse-traceless gauge in de Sitter spacetime. In the cosmological constant going…
A relation between massive and massless string tree amplitudes
Sitender Pratap Kashyap, Carlos R. Mafra, Mritunjay Verma +1
We uncover a relation between the scattering amplitudes of massive strings and the expansion of the massless string amplitude at tree level. More precisely, the n-point tree a…
Theory dependence of black hole interior reconstruction and the extended strong subadditivity
Sitender Pratap Kashyap, Roji Pius, Manish Ramchander
An AdS eternal black hole in equilibrium with a finite temperature bath presents a Hawking-like information paradox due to a continuous exchange of radiation with the bath. The non…
One Loop Mass Renormalization of Massive States Using Pure Spinor Formalism
Sitender Pratap Kashyap, Mritunjay Verma
As a check of the first massive integrated vertex operator in the pure spinor formalism constructed in arXiv:1802.04486, we compute the one loop 2-point function of the stable non-…
The Mostly BRST Exact Operator in Superstrings
Sitender Pratap Kashyap
A careful gauge fixing of the conformal killing group (CKG) on genus zero surfaces in bosonic string theory gives non-vanishing two point amplitudes that match the corresponding fi…
Two-Point Superstring Tree Amplitudes Using the Pure Spinor Formalism
Sitender Pratap Kashyap
We provide a prescription for computing two-point tree amplitudes in the pure spinor formalism that are finite and agree with the corresponding expression in the field theories. In…
Amplitudes Involving Massive States Using Pure Spinor Formalism
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Mritunjay Verma
Same amplitudes evaluated independently using RNS and pure spinor formalism are expected to agree. While for massless states, this fact has been firmly established, for massive sta…
Integrated Massive Vertex Operator in Pure Spinor Formalism
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Mritunjay Verma
We construct the integrated vertex operator for the first massive states of open superstrings with in the pure spinor formalism of the superstring theory. This vert…
Testing Subleading Multiple Soft Graviton Theorem for CHY Prescription
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Biswajit Sahoo +2
In arXiv:1707.06803 we derived the subleading multiple soft graviton theorem in a generic quantum theory of gravity for arbitrary number of soft external gravitons and arbitrary nu…
Subleading Soft Theorem for Multiple Soft Gravitons
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Biswajit Sahoo +2
We derive the subleading soft graviton theorem in a generic quantum theory of gravity for arbitrary number of soft external gravitons and arbitrary number of finite energy external…
Theta Expansion of First Massive Vertex Operator in Pure Spinor
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Mritunjay Verma
We provide the covariant superspace equations that are sufficient to determine the complete expansion of the vertex operator of the open string massive states with $(mass)^2=1/…
Closed Superstring Field Theory and its Applications
Corinne de Lacroix, Harold Erbin, Sitender Pratap Kashyap +2
We review recent developments in the construction of heterotic and type II string field theories and their various applications. These include systematic procedures for determining…
Surviving in a Metastable de Sitter Space-Time
Sitender Pratap Kashyap, Swapnamay Mondal, Ashoke Sen +1
In a metastable de Sitter space any object has a finite life expectancy beyond which it undergoes vacuum decay. However, by spreading into different parts of the universe which wil…