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BEGIN:VEVENT
SUMMARY:Scattering Amplitudes from Intersection Theory
DTSTART;VALUE=DATE-TIME:20190425T120000Z
DTEND;VALUE=DATE-TIME:20190425T140000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-812354@indico.cern.ch
DESCRIPTION:Speakers: Sebastian Mizera (Perimeter Institute for Theoretica
l Physics)\nIt has been long known that intersection theory on the moduli
space of punctured Riemann surfaces encodes observables in two-dimensional
quantum gravity. It is natural to ask whether interacting theories could
also admit a similar description. In the genus-zero case we put forward a
twisted version of intersection theory on the moduli space and propose tha
t it computes tree-level scattering amplitudes in a range of quantum field
theories in general space-time dimension. After outlining their universal
properties and relations to the low-energy limit of string theory amplitu
des\, we present recursion relations for intersection numbers on the natur
al fibration of moduli spaces.\nhttps://indico.cern.ch/event/812354/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/812354/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A 10D view of KKLT
DTSTART;VALUE=DATE-TIME:20190430T120000Z
DTEND;VALUE=DATE-TIME:20190430T133000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-792836@indico.cern.ch
DESCRIPTION:Speakers: Fridrik Freyr Gautason (KU Leuven)\nI will discuss d
e Sitter constructions in string theory with emphasis on the KKLT backgrou
nd. I will emphasise the role played by scale separated AdS vacua as an in
termediate step in building such a dS vacuum. Finally I will review the la
test developments in obtaining KKLT purely from a 10D point of view.\nhttp
s://indico.cern.ch/event/792836/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/792836/
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BEGIN:VEVENT
SUMMARY:Adventures in Perturbation Theory
DTSTART;VALUE=DATE-TIME:20190507T120000Z
DTEND;VALUE=DATE-TIME:20190507T140000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-793066@indico.cern.ch
DESCRIPTION:Speakers: Jacob Bourjaily (Niels Bohr Institute)\nThere have b
een incredible advances in our ability to represent perturbative scatterin
g amplitudes in terms of gauge-invariant\, physical information. An import
ant insight leading to this progress has been the realization that the sti
ll-difficult problem of loop integration can and should be separated
from the (now understood to be) much simpler problem of constructing loop
integrands. I review and update the powerful unitarity-based methods to
construct integrands constructively\, and argue that these new representa
tions should make loop integration easier. \n\nIn the second part of t
he talk\, I discuss evidence testing this conviction. In particular\, I wi
ll show that many loop integrals turn out to be much easier than many ha
d feared\; but that these easy (polylogarithmic) integrals\, unfortunately
\, represent a set of measure zero. I will conclude with a survey of recen
t results addressing the question of what kinds of functions are needed t
o represent general amplitudes perturbative quantum field theory? \nhttps
://indico.cern.ch/event/793066/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/793066/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exact results in N=1 theories of class Sk
DTSTART;VALUE=DATE-TIME:20190521T120000Z
DTEND;VALUE=DATE-TIME:20190521T140000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-793593@indico.cern.ch
DESCRIPTION:Speakers: Elli Pomoni\nWe will begin by introducing this class
of N=1 SCFTs\, which is obtained from Gaiotto’s class S of N=2 SCFTs v
ia orbifolding. We can study the Coulomb branch of these theories by cons
tructing and analyzing their spectral curves. Employing our experience wi
th the AGT correspondence we will search for a 2D/4D relation for the N=1
SCFTs in class Sk. From the curves we can identify the 2D CFT symmetry
algebra and its representations\, namely the conformal blocks of the Viras
oro/W-algebra\, that underlie the 2D theory and reproduce the spectral cu
rves of the N = 1 SCFTs. These conformal blocks give a prediction for the
instanton partition functions of the 4D N = 1 SCFTs of class Sk. Finally
\, we will present a completely independent\, elliptic genus calculation\
, counting open string states on Dp/D(p-4) brane systems in type IIB stri
ng theory\, which exactly reproduces our previous result for the instanto
n partition functions.\nhttps://indico.cern.ch/event/793593/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/793593/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Black holes in N=4 Super-Yang-Mills
DTSTART;VALUE=DATE-TIME:20190528T120000Z
DTEND;VALUE=DATE-TIME:20190528T140000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-794037@indico.cern.ch
DESCRIPTION:Speakers: Francesco Benini (SISSA\, Trieste)\n\nAdS/CFT provi
des a consistent non-perturbative definition of quantum\ngravity in asympt
otically AdS space. Black holes should correspond to\nensembles of states
in the boundary field theory. By analyzing the\nsuperconformal index of 4d
N=4 SU(N) Super-Yang-Mills\, with the help\nof a new Bethe Ansatz type fo
rmula\, we are able to exactly reproduce\nthe Bekenstein-Hawking entropy o
f BPS black holes in AdS5 x S5. The\nlarge N limit exhibits many competing
contributions and Stokes\nphenomena\, hinting at new physics.\nhttps://in
dico.cern.ch/event/794037/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/794037/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Talk by Diptarka Das
DTSTART;VALUE=DATE-TIME:20190702T120000Z
DTEND;VALUE=DATE-TIME:20190702T140000Z
DTSTAMP;VALUE=DATE-TIME:20190521T211600Z
UID:indico-event-811716@indico.cern.ch
DESCRIPTION:Speakers: Diptarka Das (Indian Inst. Tech.\, Kanpur)\nhttps://
indico.cern.ch/event/811716/
LOCATION:4-3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/811716/
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