Zobrazeno 1 - 10
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pro vyhledávání: '"Haldar, Parthiv"'
Autor:
Haldar, Parthiv
S-matrix is one of the fundamental observables of the quantum theory of relativistic particles. There have been attempts to understand the quantum dynamics of relativistic particles abstractly in terms of S-matrix bypassing a Lagrangian formulation o
Externí odkaz:
http://arxiv.org/abs/2211.15594
This paper discusses the locality and analyticity of the crossing symmetric dispersion relation (CSDR). Imposing locality constraints on the CSDR gives rise to a local and fully crossing symmetric expansion of scattering amplitudes, dubbed as Feynman
Externí odkaz:
http://arxiv.org/abs/2205.13762
Publikováno v:
SciPost Phys. 13, 051 (2022)
We develop crossing symmetric dispersion relations for describing 2-2 scattering of identical external particles carrying spin. This enables us to import techniques from Geometric Function Theory and study two sided bounds on low energy Wilson coeffi
Externí odkaz:
http://arxiv.org/abs/2112.11755
Publikováno v:
SciPost Phys. 11, 002 (2021)
An intriguing correspondence between ingredients in geometric function theory related to the famous Bieberbach conjecture (de Branges' theorem) and the non-perturbative crossing symmetric representation of 2-2 scattering amplitudes of identical scala
Externí odkaz:
http://arxiv.org/abs/2103.12108
Publikováno v:
JHEP12(2020)117
We extend the analysis of \cite{Chowdhury:2019hns} to study the Regge trajectories of the Mellin amplitudes of the $0-$ and $1-$ magnon correlators of the generalized Fishnet theory in $d$ dimensions and one type of correlators of chiral fishnet theo
Externí odkaz:
http://arxiv.org/abs/2008.10201
Publikováno v:
SciPost Phys. 9, 081 (2020)
We consider entanglement measures in 2-2 scattering in quantum field theories, focusing on relative entropy which distinguishes two different density matrices. Relative entropy is investigated in several cases which include $\phi^4$ theory, chiral pe
Externí odkaz:
http://arxiv.org/abs/2006.12213
Autor:
Haldar, Parthiv, Sinha, Aninda
Publikováno v:
SciPost Phys. 8, 095 (2020)
We derive bounds analogous to the Froissart bound for the absorptive part of CFT$_d$ Mellin amplitudes. Invoking the AdS/CFT correspondence, these amplitudes correspond to scattering in AdS$_{d+1}$. We can take a flat space limit of the corresponding
Externí odkaz:
http://arxiv.org/abs/1911.05974
We study the Regge trajectories of the Mellin amplitudes of the $0-,1-$ and $2-$ magnon correlators of the Fishnet theory. Since fishnet theory is both integrable and conformal, the correlation functions are known exactly. We find that while for $0$
Externí odkaz:
http://arxiv.org/abs/1908.01123
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