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Bounds on photon scattering / Häring, Kelian (CERN ; Ecole Polytechnique, Lausanne) ; Hebbar, Aditya (Ecole Polytechnique, CPHT ; Ecole Polytechnique, Lausanne) ; Karateev, Denis (U. Geneva (main) ; Ecole Polytechnique, Lausanne) ; Meineri, Marco (U. Geneva (main) ; Ecole Polytechnique, Lausanne) ; Penedones, João (Ecole Polytechnique, Lausanne)
We study 2-to-2 scattering amplitudes of massless spin one particles in $d=4$ space-time dimensions, like real world photons. We define a set of non-perturbative observables (Wilson coefficients) which describe these amplitudes at low energies. [...]
arXiv:2211.05795; CERN-TH-2022-161.- 2024-10-11 - 95 p. - Published in : JHEP 2410 (2024) 103 Fulltext: 2211.05795 - PDF; document - PDF;

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Bootstrapping photon scattering in 3+1d* / Hebbar, Aditya (speaker) (École Polytechnique)
The S-matrix bootstrap is a program where one uses the general principles of analyticity, crossing symmetry and unitarity of scattering amplitudes to study the allowed space of quantum field theories. In this talk I will consider the two photon to two photon scattering amplitude and explain how we can use numerical S-matrix bootstrap methods to derive non-perturbative bounds on Wilson coefficients in the low energy effective field theory expansion of photons..
2022 - 5721. TH institutes; Nonperturbative Methods in Quantum Field Theory External links: Talk details; Event details In : Nonperturbative Methods in Quantum Field Theory

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Flux Tube S-matrix Bootstrap / Elias Miró, Joan (CERN) ; Guerrieri, Andrea L. (ICTP-SAIFR, Sao Paulo) ; Hebbar, Aditya (EPFL, Lausanne, FSL) ; Penedones, João (EPFL, Lausanne, FSL) ; Vieira, Pedro (Perimeter Inst. Theor. Phys. ; ICTP-SAIFR, Sao Paulo)
We bootstrap the S-matrix of massless particles in unitary, relativistic two dimensional quantum field theories. We find that the low energy expansion of such S-matrices is strongly constrained by the existence of a UV completion. [...]
arXiv:1906.08098.- 2019-11-28 - 6 p. - Published in : Phys. Rev. Lett. 123 (2019) 221602 Article from SCOAP3: PDF; Fulltext: PDF;

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