BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Severin Barmeier (University of Freiburg\, Germany) DTSTART:20210422T110000Z DTEND:20210422T120000Z DTSTAMP:20260423T005750Z UID:LAGOON/38 DESCRIPTION:Title: Scattering amplitudes from derived categories and cluster categories\n by Severin Barmeier (University of Freiburg\, Germany) as part of Longitud inal Algebra and Geometry Open ONline Seminar (LAGOON)\n\n\nAbstract\nScat tering amplitudes are physical observables which play a central role in in terpreting scattering experiments at particle colliders. In recent years a new perspective on scattering amplitudes has revealed a fascinating link to various mathematical structures\, such as positive Grassmannians and cl uster algebras. In this talk I will explain this connection from the point of view of derived and cluster categories of type A quivers\, from which the formulae for scattering amplitudes can be obtained from projectives of hearts of intermediate t-structures. This talk is based on arXiv:2101.028 84 joint with Koushik Ray.\n LOCATION:https://researchseminars.org/talk/LAGOON/38/ END:VEVENT END:VCALENDAR