Bounds on photon scattering

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. We use full non-linear unitarity to construct various...

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Veröffentlicht in:	arXiv.org 2022-11
Hauptverfasser:	Häring, Kelian, Hebbar, Aditya, Karateev, Denis, Meineri, Marco, Penedones, João
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplitudes Particle spin Photon scatter Photons Physics - High Energy Physics - Phenomenology Physics - High Energy Physics - Theory
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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. We use full non-linear unitarity to construct various novel numerical bounds on these observables. For completeness, we also rederive some bounds using positivity only. We discover and explain why some of these Wilson coefficients cannot be bounded.
ISSN:	2331-8422
DOI:	10.48550/arxiv.2211.05795