BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Vladimir Rosenhaus (IAS) DTSTART:20201111T000000Z DTEND:20201111T010000Z DTSTAMP:20260423T024027Z UID:ttbar2020/9 DESCRIPTION:Title: Integrability and renormalization under T \\\\bar T\nby Vladimir Ro senhaus (IAS) as part of TTbar Deformation and Integrability\n\n\nAbstract \nSmirnov and Zamolodchikov recently introduced a new class of two-dimensi onal quantum field theories\, defined through a differential change of any existing theory by the determinant of the energy-momentum tensor. From th is TT¯ flow equation one can find a simple expression for both the energy spectrum and the S-matrix of the TT¯ deformed theories. Our goal is to f ind the renormalized Lagrangian of the TT¯ deformed theories. In the cont ext of the TT¯ deformation of an integrable theory\, the deformed theory is also integrable and\, correspondingly\, the S-matrix factorizes into tw o-to-two S-matrices. One may thus hope to be able to extract the renormali zed Lagrangian from the S-matrix. We do this explicitly for the TT¯ defor mation of a free massive scalar\, to second order in the deformation param eter. Once one has the renormalized Lagrangian one can\, in principle\, co mpute all other observables\, such as correlation functions. We briefly di scuss this\, as well as the relation between the renormalized Lagrangian\, the TT¯ flow equation\, and the S-matrix.\n LOCATION:https://researchseminars.org/talk/ttbar2020/9/ END:VEVENT END:VCALENDAR