Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

The Lüscher scattering formalism on the t-channel cut

Aug 8, 2022, 5:30 PM
CP1-HSZ/0.010 (CP1-HSZ) - HS2 (CP1-HSZ)

CP1-HSZ/0.010 (CP1-HSZ) - HS2


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Oral Presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions


Mr Andre Baiao Raposo (University of Edinburgh)


The Lüscher scattering formalism, the standard approach for relating the discrete finite-volume energy spectrum to two-to-two scattering amplitudes, fails when analytically continued so far below the infinite-volume two-particle threshold that one encounters the t-channel cut. This is relevant, especially in baryon-baryon scattering applications, as finite-volume energies can be observed in this below-threshold regime, and it is not clear how to make use of them. In this talk we present a generalisation of the scattering formalism that resolves this issue, allowing one to also constrain scattering amplitudes on the t-channel cut.

Primary authors

Mr Andre Baiao Raposo (University of Edinburgh) Max Hansen (University of Edinburgh)

Presentation materials