Results 1 to 10 of about 25,087,611 (147)
Bridging positivity and S-matrix bootstrap bounds [PDF]
Journal of High Energy Physics, 2023 The main objective of this work is to isolate Effective Field Theory scattering amplitudes in the space of non-perturbative two-to-two amplitudes, using the S-matrix Bootstrap.
Joan Elias Miró +2 more
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Spinning S-matrix bootstrap in 4d [PDF]
Journal of High Energy Physics, 2022 We review unitarity and crossing constraints on scattering amplitudes for particles with spin in four dimensional quantum field theories. As an application we study two to two scattering of neutral spin 1/2 fermions in detail.
Aditya Hebbar +2 more
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Selection rules for the S-Matrix bootstrap [PDF]
SciPost Physics, 2021 We examine the space of allowed S-matrices on the Adler zeros' plane using the recently resurrected (numerical) S-matrix bootstrap program for pion scattering.
Anjishnu Bose, Aninda Sinha, Shaswat S Tiwari
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The O(N) S-matrix monolith [PDF]
Journal of High Energy Physics, 2020 We consider the scattering matrices of massive quantum field theories with no bound states and a global O(N) symmetry in two spacetime dimensions. In particular we explore the space of two-to-two S-matrices of particles of mass m transforming in the ...
Lucía Córdova +3 more
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Crossing Symmetric Spinning S-matrix Bootstrap: EFT bounds [PDF]
SciPost Physics, 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 ...
Subham Dutta Chowdhury, Kausik Ghosh, Parthiv Haldar, Prashanth Raman, Aninda Sinha
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EFT anomalous dimensions from the S-matrix [PDF]
Journal of High Energy Physics, 2020 We use the on-shell S-matrix and form factors to compute anomalous dimensions of higher dimension operators in the Standard Model Effective Field Theory. We find that in many instances, these computations are made simple by using the on-shell method.
Joan Elias Miró +2 more
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An analytical toolkit for the S-matrix bootstrap [PDF]
Journal of High Energy Physics, 2021 We revisit analytical methods for constraining the nonperturbative S-matrix of unitary, relativistic, gapped theories in d ≥ 3 spacetime dimensions. We assume extended analyticity of the two-to-two scattering amplitude and use it together with elastic ...
Miguel Correia +2 more
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Shockwave S-matrix from Schwarzian quantum mechanics [PDF]
Journal of High Energy Physics, 2018 Schwarzian quantum mechanics describes the collective IR mode of the SYK model and captures key features of 2D black hole dynamics. Exact results for its correlation functions were obtained in [1]. We compare these results with bulk gravity expectations.
Ho Tat Lam +3 more
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S-matrix bootstrap for resonances [PDF]
Journal of High Energy Physics, 2018 We study the 2 → 2 S-matrix element of a generic, gapped and Lorentz invariant QFT in d = 1 + 1 space time dimensions. We derive an analytical bound on the coupling of the asymptotic states to unstable particles (a.k.a.
N. Doroud, J. Elias Miró
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The S-matrix bootstrap IV: multiple amplitudes [PDF]
Journal of High Energy Physics, 2019 We explore the space of consistent three-particle couplings in ℤ2-symmetric two-dimensional QFTs using two first-principles approaches. Our first approach relies solely on unitarity, analyticity and crossing symmetry of the two-to-two scattering ...
Alexandre Homrich +4 more
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