Results 1 to 10 of about 1,831,541 (219)
Spinning S-matrix bootstrap in 4d
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
doaj +1 more source
The soft S $$ \mathcal{S} $$ -matrix in gravity
Journal of High Energy Physics, 2020 The gravitational S $$ \mathcal{S} $$ -matrix defined with an infrared (IR) cutoff factorizes into hard and soft factors. The soft factor is universal and contains all the IR and collinear divergences.
E. Himwich +4 more
doaj +1 more source
Contour integrals and the modular S $$ \mathcal{S} $$ -matrix
Journal of High Energy Physics, 2020 We investigate a conjecture to describe the characters of large families of RCFT’s in terms of contour integrals of Feigin-Fuchs type. We provide a simple algorithm to determine the modular S $$ \mathcal{S} $$ -matrix for arbitrary numbers of characters ...
Sunil Mukhi, Rahul Poddar, Palash Singh
doaj +1 more source
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
doaj +1 more source
Bridging positivity and S-matrix bootstrap bounds
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
doaj +1 more source
Nanoscale precipitations in deformed dilute alloying Mg-Zn-Gd alloy
Materials & Design, 2020 Nanoscale precipitations in deformed dilute alloying Mg-Zn-RE alloys usually play critical positive roles in mechanical properties, while characterizing them still poses a significant challenge due to their small size and low volume fraction.
Hongwei Miao +6 more
doaj +1 more source
S matrix for a three-parameter integrable deformation of AdS 3 × S 3 strings
Journal of High Energy Physics, 2020 We consider the three-parameter integrable deformation of the AdS 3 × S 3 superstring background constructed in arXiv:1811.00453. Working on the string worldsheet in uniform lightcone gauge, we find the tree-level bosonic S matrix of the model and study ...
Marco Bocconcello +3 more
doaj +1 more source
Selection rules for the S-Matrix bootstrap
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
doaj +1 more source
S-matrix bootstrap for resonances
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
doaj +1 more source
Celestial insights into the S-matrix bootstrap
Journal of High Energy Physics, 2022 We consider 2-2 scattering in four spacetime dimensions in Celestial variables. Using the crossing symmetric dispersion relation (CSDR), we recast the Celestial amplitudes in terms of crossing symmetric partial waves.
Sudip Ghosh +2 more
doaj +1 more source