BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ines Aniceto (Southampton U) DTSTART:20200521T130000Z DTEND:20200521T150000Z DTSTAMP:20260423T035824Z UID:LIJC/3 DESCRIPTION:Title: Int egrable Field Theories with an Interacting Massless Sector\nby Ines An iceto (Southampton U) as part of London Integrability Journal Club\n\n\nAb stract\nIntegrability techniques have played a major role in the study the AdS/CFT correspondence\, providing an accurate description of different s tring theoretic observables beyond the weak or strong coupling perturbati on theory. However\, the case of string on certain $AdS_3$ backgrounds pro vided new challenges in the form of massless excitations. Difficulties in incorporating these into the integrable description have led to disagreeme nts concerning the energy of massive physical states. \nIn general integra ble theories\, massless and massive sectors can generally be treated separ ately. We know this cannot be the case in $AdS_3$\, but a full TBA descrip tion of the interaction between the sectors is yet to be found. Surprising ly\, such a description can found in a family of integrable field theories — homogeneous sine-Gordon models. Here\, one can take a double scaling limit of the adjustable parameters and zoom into a regime described by a TBA where the massless sector does not decouple and contributes to the ene rgy of massive particles at the same order as for which the Bethe ansatz w ould suffice in a massive theory.\n\nannouncements also on https://integra bility-london.weebly.com/\n LOCATION:https://researchseminars.org/talk/LIJC/3/ END:VEVENT END:VCALENDAR