BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LAPTh - ECPv6.15.17//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.lapth.cnrs.fr
X-WR-CALDESC:Évènements pour LAPTh
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20200329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20201025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211216T110000
DTEND;TZID=Europe/Paris:20211216T120000
DTSTAMP:20260411T010357
CREATED:20220620T163006Z
LAST-MODIFIED:20220620T163006Z
UID:7841-1639652400-1639656000@www.lapth.cnrs.fr
SUMMARY:Alphabets for Quantum Field Theory
DESCRIPTION:As the LHC accumulates data\, the need grows for more efficient\nmethods to compute scattering amplitudes. One such method manages to\nswap the difficult problem of integrating thousands of Feynman diagrams\nfor a much simpler one: solving a system of linear equations. This can\nbe done when there is a known « alphabet » of appropriate singularities\nfor the amplitudes. I will describe a case where this has been pushed\nquite far: six-particle amplitudes in maximally supersymmetric\nYang-Mills\, where I have computed amplitudes up to seven loops. I will\nthen change gears and discuss a class of functions where the form of\nthis alphabet is not yet known. These functions have surprising links to\nCalabi-Yau manifolds\, and occur in general theories as early as two loops.\n 
URL:https://www.lapth.cnrs.fr/event/alphabets-for-quantum-field-theory/
CATEGORIES:Weekly seminars
END:VEVENT
END:VCALENDAR