[Theory-seminars] Theory Seminar Monday (remote) - André Baião Raposo

[Zheng-Yang Li]

Dear all,

On Monday, February 19th, 2024 at 1pm EST, we will have a virtual seminar given by André Baião Raposo of University of Edinburgh on the Zoom for Government link:

https://jlab-org.zoomgov.com/j/1619897042?pwd=NzdxWmZCSy9uMTQ1dnBjVVpDaUFiQT09

Please see below for the title and abstract.


Theory Seminar: February 19th, 1pm EST (virtual)


Speaker: André Baião Raposo (University of Edinburgh)


Title: Two Troubled Hadrons in a Box: solving left-hand cut issues in the Lüscher scattering formalism


Abstract: The Lüscher formalism is a widely used method in the study of scattering processes through lattice QCD. It allows one to relate finite-volume spectrum information obtained in lattice calculations to scattering amplitudes. Recent lattice results for systems where a lighter particle can couple to heavier scattering particles (e.g. nucleon-nucleon or DD* scattering) have highlighted the limitations of the standard formalism below the two-particle threshold. Due to the presence of left-hand cuts in the angular-momentum-projected scattering amplitudes, the method leads to inconsistencies if applied far enough below threshold that one hits these cuts. In this talk, I describe an extension of the existing formalism that circumvents this issue for the nearest left-hand cut and present the full workflow to hence obtain the scattering amplitude.


See you on Monday.


Best regards,

Caroline, Joe, and Zheng-Yang

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