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X-WR-CALNAME:IAS Physics-external
BEGIN:VEVENT
UID:f1a9ab3c-693b-450c-9989-764ed16e537c
DTSTAMP:20200602T185815Z
CREATED:20200221T143223Z
DESCRIPTION:Topic: The 2 to 3 Frontier in NNLO LHC Calculations\n\nSpeaker:
Alexander Mitov\, Cavendish Lab\, Cambridge\n\nFor the last 5 years or so
\, there has been a major effort towards the calculation of two-loop 5-poi
nt QCD amplitudes and their corresponding LHC cross-sections at NNLO. Very
recently\, the first such calculation - 3-photon production - was complet
ed [arXiv:1911.00479]. I will explain the novel features\, and lessons lea
rned\, in regard to 5-point two-loop QCD amplitudes. I will also present a
detailed comparison of the new NNLO predictions for 3-photon production w
ith existing LHC measurements. Such a comparison is of particular interest
given the discrepancy between NLO predictions and data. This calculation
represents a stepping stone for tackling another LHC milestone: 3-jet prod
uction in NNLO QCD. An update on the ongoing 3-jet calculation will be giv
en. The seminar should be of interest to both theorists and LHC experiment
alists.
DTSTART:20200303T210000Z
DTEND:20200303T210000Z
LAST-MODIFIED:20200227T140250Z
LOCATION:Jadwin Hall Room 303
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109516
END:VEVENT
BEGIN:VEVENT
UID:74f059aa-2ca7-4dce-8a67-cfce952dd85c
DTSTAMP:20200602T185815Z
CREATED:20200116T145102Z
DESCRIPTION:Topic: Modular Invariance in Superstring Theory from N=4 Super-
Yang-Mills\n\nSpeaker: Silviu Pufu\, Princeton University\n\nIn this talk\
, I will first review some of the recent progress on computing holographic
correlators using analytic bootstrap techniques combined with supersymmet
ric localization\, focusing on the case of the N = 4 super-Yang-Mills theo
ry. From taking a certain flat space limit of the holographic correlators\
, one can obtain scattering amplitudes of gravitons in string theory\, and
one can then reproduce some of the known results for these scattering amp
litudes. In particular\, from instanton effects in the N=4 SYM theory\, I
will explain how to reproduce the non-holomorphic Eisenstein series known
to appear in type IIB string theory scattering amplitudes.
DTSTART:20200306T184500Z
DTEND:20200306T184500Z
LAST-MODIFIED:20200227T192330Z
LOCATION:Princeton University\, 407 Jadwin Hall\, PCTS Seminar Room
SUMMARY:High Energy Theory Seminar
URL:https://www.ias.edu/node/107911
END:VEVENT
BEGIN:VEVENT
UID:3de78a0d-9392-4303-8490-ca946348994b
DTSTAMP:20200602T185815Z
CREATED:20200221T143436Z
DESCRIPTION:Topic: The Quasi-Local Penrose Inequality and the Hoop Conjectu
re\n\nSpeaker: Martin Lesourd\, Harvard BHI\n\nThe Spacetime Inequality of
Penrose 1972 says that any slice in any black hole spacetime\, the ADM ma
ss of the slice is bounded below by the area of cuts with the event horizo
n. (Its quasi-local version is a refinement involving quasi-local notions
of mass and energy). The Hoop Conjecture proposed by Thorne 1972 says that
black holes form when the quasi-local mass M associated with some region
of some characteristic length C satisfies ''M > const. C''. These conjectu
res are open in full generality and I will present some recent progress wh
ich proves them in a certain setting. This is joint with S.T. Yau and A. A
laee.
DTSTART:20200309T163000Z
DTEND:20200309T163000Z
LAST-MODIFIED:20200303T141902Z
LOCATION:Princeton University\, Jadwin Hall\, Princeton Gravity Initiative\
, 4th Floor
SUMMARY:Gravity Initiative Lunch
URL:https://www.ias.edu/node/109521
END:VEVENT
BEGIN:VEVENT
UID:074b4a4f-677f-4bbe-8cc7-00bc1268e009
DTSTAMP:20200602T185815Z
CREATED:20200210T193052Z
DESCRIPTION:Topic: Quantum Computing and Machine Learning in High Energy Da
ta Analysis\n\nSpeaker: Prasnth Shyamsundar\, University of Florida\n\nRec
ently there has been a growing interest in the application of quantum comp
uting and machine learning in many scientific disciplines\, including high
energy physics. In the first half of this talk\, we will look at a novel
quantum computing based technique to search for unmodeled deviations from
a simulated expectation in high-dimensional collider data. In the second h
alf\, we will look at some ways in which the goals of machine learning\, a
s it is used currently in analyses\, are not perfectly aligned with the ph
ysics goals of the analyses. We will also look at ways of rectifying the d
emonstrated misalignments.
DTSTART:20200310T200000Z
DTEND:20200310T200000Z
LAST-MODIFIED:20200212T205826Z
LOCATION:Jadwin Hall Room 303
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109141
END:VEVENT
BEGIN:VEVENT
UID:438eaadc-b3ab-46a7-9762-619cb489e293
DTSTAMP:20200602T185815Z
CREATED:20200210T193156Z
DESCRIPTION:Topic: Direct Detection Experiments in the Gaia Era\n\nSpeaker:
JiJi Fan\, Brown University\n\nPlease use this link to sign into the remo
te talk via ZOOM: http://bit.ly/phenoandvino\n\nThe advent of the Gaia era
has led to potentially revolutionary understanding of dark matter dynamic
s in our galaxy\, which has important consequences for direct detection ex
periments. In this talk\, I will discuss the effects of various dark matte
r substructures inferred from the Gaia data on possible direct detection s
ignals at next-generation experiments. In particular\, I will focus on the
implications of the so-called Gaia sausage for the dark matter-nuclear in
teractions\, as well as the unique modulation signatures of several possib
le streams associated with dark matter-electron interactions.
DTSTART:20200324T200000Z
DTEND:20200324T200000Z
LAST-MODIFIED:20200323T133944Z
LOCATION:via ZOOM
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109146
END:VEVENT
BEGIN:VEVENT
UID:062ad877-29cc-4047-afc3-4368e585a76b
DTSTAMP:20200602T185815Z
CREATED:20200221T144027Z
DESCRIPTION:Topic: TBA\n\nSpeaker: Matthew Heydeman\, Princeton University
\n\n
DTSTART:20200330T163000Z
DTEND:20200330T163000Z
LAST-MODIFIED:20200319T135425Z
LOCATION:Jadwin Hall\, Princeton Gravity Initiative\, 4th Floor
SUMMARY:Gravity Initiative Lunch - CANCELED
URL:https://www.ias.edu/node/109536
END:VEVENT
BEGIN:VEVENT
UID:ad34f0d3-ab93-42ca-915b-cab77173fdf5
DTSTAMP:20200602T185815Z
CREATED:20200227T140731Z
DESCRIPTION:Topic: The Supersymmetric Cardy Formula from Effective Actions
\n\nSpeaker: Martin Fluder\, Princeton University\n\nTo connect to the HET
Seminar via Zoom\, please do the following:\n\n1 - If you have Zoom insta
lled on your device\, enter the following meeting ID: 623157143\, click Jo
in Meeting.\n\n2 - If you do not have Zoom installed\, click the following
link to download and install: https://princeton.zoom.us/j/623157143\n\n3
- Once installed\, click the very same link to connect to the meeting.\n\n
Abstract: In this talk I will discuss supersymmetric Cardy formulae in d=4
and d=6. These formulae govern the universal behavior in the high-tempera
ture regime of supersymmetric partition functions — or\, in the case of th
e superconformal index\, they govern the high-energy asymptotics of SUSY o
perators at large energy. I will outline the proof of the Cardy formulae f
or theories with moduli spaces of vacua\, which relies on an effective sup
ersymmetric Chern-Simons action in d-1 dimensions. I will argue that this
effective action is universal and intimately related to perturbative as we
ll as global gravitational anomalies. Finally\, I will discuss some immedi
ate consequences of our results and briefly compare and distinguish our re
sults to other proposed Cardy formulas.
DTSTART:20200403T174500Z
DTEND:20200403T174500Z
LAST-MODIFIED:20200331T190336Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/node/109756
END:VEVENT
BEGIN:VEVENT
UID:aa20855b-a397-41ad-9382-a3b4c37f73e9
DTSTAMP:20200602T185815Z
CREATED:20200227T140927Z
DESCRIPTION:Topic: Fine Probes of Quantum Chaos\n\nSpeaker: Mark Mezei\, St
ony Brook University\n\nTo connect to the HET Seminar via Zoom\, please do
the following:\n\n1 - If you have Zoom installed on your device\, enter t
he following meeting ID: 507 717 817\, click Join Meeting.\n2 - If you do
not have Zoom installed\, click the following link to download and install
: https://princeton.zoom.us/j/507717817\n3 - Once installed\, click the ve
ry same link to connect to the meeting.\n\nAbstract: Quantum chaotic dynam
ics is associated to diverse physical phenomena and signatures. In this ta
lk\, we describe progress in building effective theories for three of thes
e: the butterfly effect\, the pole skipping phenomenon\, and thermalizatio
n through the lens of entanglement entropy. We uncover their interplay by
showing that the butterfly velocity plays an important role in all three m
anifestations of chaos. The discussion is informed by results from AdS/CFT
and from models of SYK type.
DTSTART:20200406T183000Z
DTEND:20200406T183000Z
LAST-MODIFIED:20200403T230014Z
LOCATION:Remote via Zoom
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/node/109761
END:VEVENT
BEGIN:VEVENT
UID:041786c1-d0b3-4cc5-b460-5f184f7c069d
DTSTAMP:20200602T185815Z
CREATED:20200402T183522Z
DESCRIPTION:Topic: Resurgence\, WKB and Strings\n\nSpeaker: Marcos Marino\,
University of Geneva\n\nHere are the below details to join\nVia Web Brows
er / Zoom App: https://unige.zoom.us/j/747717345\nMeeting ID: 747 717 345
\n\nAbstract: The WKB method has played a fundamental role in the developm
ent of quantum mechanics. In the 1980s and 1990s\, and largely under the i
nfluence of Ecalle’s theory of resurgence\, it was upgraded to the exact (
or complex) WKB method. More recently\, developments in supersymmetric gau
ge theory and string theory have provided a new perspective on this venera
ble subject. In this talk I will review the basic ingredients of the exact
WKB method and present new results inspired by gauge theory/string theory
. I will show in particular that the work of Gaiotto-Moore-Neitzke on BPS
states provides an elegant solution of the exact WKB method as applied to
arbitrary polynomial potentials. I will also discuss some open problems in
the subject.
DTSTART:20200407T190000Z
DTEND:20200407T190000Z
LAST-MODIFIED:20200403T231843Z
LOCATION:via web conference
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110346
END:VEVENT
BEGIN:VEVENT
UID:14076d53-5ea6-4254-be0e-5be0695afbee
DTSTAMP:20200602T185815Z
CREATED:20200210T193304Z
DESCRIPTION:Topic: Gravitational Waves: A New Window onto the Early Univers
e\n\nSpeaker: Djuna Croon\, TRIUMF\n\nZoom link - bit.ly/phenoandvino\n\nA
bstract: In anticipation of the next generation of gravitational wave expe
riments\, I will discuss the opportunities for phenomenological studies of
particle physics in the Early Universe. The focus of the talk will be on
first order phase transitions and how they can help us address open proble
ms such as the generation of the matter/anti-matter asymmetry\, the strong
CP-problem\, and the nature of the dark sector. I will discuss several su
ch examples and their merit\, and comment on complementarity with other ex
periments.
DTSTART:20200407T200000Z
DTEND:20200407T200000Z
LAST-MODIFIED:20200406T125537Z
LOCATION:via ZOOM
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109151
END:VEVENT
BEGIN:VEVENT
UID:8104c4d6-534a-4fa3-900d-f03b9eb1bc4d
DTSTAMP:20200602T185815Z
CREATED:20200323T152932Z
DESCRIPTION:Topic: Efficient Rules for All Conformal Blocks: A Dream Come T
rue\n\nSpeaker: Valentina Prilepina\, Laval University\n\nTo connect to th
e HET Seminar via Zoom\, please do the following:\n\n1 - If you have Zoom
installed on your device\, enter the following meeting ID: 846 573 709\, c
lick Join Meeting.\n\n2 - If you do not have Zoom installed\, click the fo
llowing link to download and install: https://princeton.zoom.us/j/84657370
9\n\n3 - Once installed\, click the very same link to connect to the meeti
ng.\n\nAbstract: In this talk\, I will lay out a set of efficient rules fo
r computing d-dimensional global conformal blocks in arbitrary Lorentz rep
resentations in the context of the embedding space operator product expans
ion (OPE) formalism. With these rules in place\, the general procedure for
determining all possible conformal blocks is reduced to (1) identifying t
he relevant group theoretic quantities and (2) applying the conformal rule
s to obtain the blocks. The rules represent a systematic prescription for
computing the blocks in a convenient mixed OPE-three-point- function basis
as well as a set of rotation matrices\, which are necessary to translate
these blocks to the pure three-point function basis relevant for the confo
rmal bootstrap. I will start by tracing their origin by describing some of
the essential ingredients present in the formalism that naturally give ri
se to these rules. I will then map out the derivation of the rules\, first
outlining the general algorithm for the rotation matrices and then procee
ding to the conformal blocks. Along the way\, l will introduce a convenien
t diagrammatic notation (somewhat reminiscent of Feynman diagrams)\, which
serves to encode parts of the computation in a compact form. Finally\, I
will treat several interesting examples to demonstrate the application of
these rules in practice.
DTSTART:20200410T174500Z
DTEND:20200410T174500Z
LAST-MODIFIED:20200323T152932Z
LOCATION:via ZOOM
SUMMARY:Princeton University High Energy Theory Seminar
URL:https://www.ias.edu/node/110201
END:VEVENT
BEGIN:VEVENT
UID:622db476-abc9-4e54-bd47-6d365d7ba7b3
DTSTAMP:20200602T185815Z
CREATED:20200402T183822Z
DESCRIPTION:Topic: Symmetry Enforced Gaplessness in Quantum Field Theory \n
\nSpeaker: Clay Cordova\, University of Chicago\n\nAbstract: Anomalies are
powerful constraints on the behavior of quantum field theories. In partic
ular\, certain anomalies imply that a QFT is either gapless or spontaneous
ly breaks its global symmetry. We review these ideas and apply them to lea
rn about chiral symmetry breaking in gauge theories.
DTSTART:20200414T190000Z
DTEND:20200414T190000Z
LAST-MODIFIED:20200413T170128Z
LOCATION:via ZOOM
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110351
END:VEVENT
BEGIN:VEVENT
UID:e1d0bf02-2661-4183-808b-bf2b71b49738
DTSTAMP:20200602T185815Z
CREATED:20200409T134412Z
DESCRIPTION:Topic: Crunching Away the Cosmological Constant Problem\n\nSpea
ker: Michael Geller\, Tel Aviv University\n\nZoom link - bit.ly/phenoandvi
no\n\nAbstract: We propose a novel explanation for the smallness of the ob
served cosmological constant (CC). Regions of space with a large CC are sh
ort lived and are dynamically driven to crunch soon after the end of infla
tion. Conversely\, regions with a small CC are metastable and long lived a
nd are the only ones to survive until late times. While the mechanism assu
mes many domains with different CC values\, it does not result in eternal
inflation nor does it require a long period of inflation to populate them.
We present a concrete dynamical model\, based on a super-cooled first ord
er phase transition in a hidden conformal sector\, that may successfully i
mplement such a crunching mechanism. We find that the mechanism can only s
olve the CC problem up to the weak scale\, above which new physics\, such
as supersymmetry\, is needed to solve the CC problem all the way to the UV
cutoff scale. The absence of experimental evidence for such new physics a
lready implies a mild little hierarchy problem for the CC. Curiously\, in
this approach the weak scale arises as the geometric mean of the temperatu
re in our universe today and the Planck scale\, hinting on a new 'CC mirac
le'\, motivating new physics at the weak scale independent of electroweak
physics. We further predict the presence of new relativistic degrees of fr
eedom in the CFT that should be visible in the next round of CMB experimen
ts. Our mechanism is therefore experimentally falsifiable and predictive.
DTSTART:20200414T200000Z
DTEND:20200414T200000Z
LAST-MODIFIED:20200409T134412Z
LOCATION:via ZOOM
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/110431
END:VEVENT
BEGIN:VEVENT
UID:0a122452-a59d-4504-a535-5f80d7656262
DTSTAMP:20200602T185815Z
CREATED:20200221T144412Z
DESCRIPTION:Topic: TBA\n\nSpeaker: Yakov Shlapentokh-Rothman\, Princeton Un
iversity\n\n
DTSTART:20200420T163000Z
DTEND:20200420T163000Z
LAST-MODIFIED:20200409T143606Z
LOCATION:TBA
SUMMARY:Gravity Initiative Lunch - CANCELED
URL:https://www.ias.edu/node/109546
END:VEVENT
BEGIN:VEVENT
UID:dfc0072e-3119-47c3-b81b-01f886161fea
DTSTAMP:20200602T185815Z
CREATED:20200402T184140Z
DESCRIPTION:Topic: 1+1d Adjoint QCD and Non-Invertible Topological Lines\n
\nSpeaker: Kantaro Ohmori\, Simons Center for Geometry and Physics\n\nAbst
ract: In ‘90s\, it is claimed that the QCD with massless adjoint quark in
1+1-dimensions is confined\, although the fermions cannot screen the Wilso
n line in the fundamental representation. In this talk\, we will see that
the confinement can be explained from the topological line operators live
in the theory. In particular\, non-invertible topological lines\, which do
es not correspond to a symmetry\, play a crucial role. This talk is based
on a ongoing work with Zohar Komargodski\, Sahand Seifnashri\, and Konstan
tinos Roumpedakis.
DTSTART:20200421T190000Z
DTEND:20200421T190000Z
LAST-MODIFIED:20200417T185858Z
LOCATION:Remote web conference
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110356
END:VEVENT
BEGIN:VEVENT
UID:99be59ea-fe6a-4b26-b134-7de83b7d6019
DTSTAMP:20200602T185815Z
CREATED:20200210T193432Z
DESCRIPTION:Topic: New Constraints on Dark Matter from Organic Targets: Wha
t Organic Chemistry Can do for Direct Detection\n\nSpeaker: Carlos Blanco\
, University of Chicago\n\nZoom link: bit.ly/phenoandvino\nAs the age of W
IMP-scale dark matter (DM) draws to a close thanks to the ever-increasing
sensitivity of direct detection experiments\, the majority of sub-GeV DM p
arameter space remains to be explored. Sub-GeV DM can excite electronic tr
ansitions in a variety of molecular and nano-scale systems which have sub-
eV scale thresholds. In particular\, organic molecules\, nanoparticles\, a
nd solvated electrons can be used to detect the low momentum recoils of da
rk matter with electrons and nuclei. Aromatic molecules such as benzene or
xylene have an electronic excitation energy of a few eV\, making them sen
sitive to DM as light as a few MeV. These compounds are often used as solv
ents in organic scintillators\, where the de-excitation process leads to a
photon which propagates until it is absorbed and re-emitted by a dilute f
luor whose emission is not absorbed by the bulk and thus reaches a photomu
ltiplier tube (PMT)\, Here\,we develop the formalism for DM-electron scatt
ering in aromatic organic molecules\, calculate the expected sensitivity t
o DM-electron scattering in benzene and p-xylene\, and apply this calculat
ion to EJ-301.
DTSTART:20200421T200000Z
DTEND:20200421T200000Z
LAST-MODIFIED:20200415T133749Z
LOCATION:Remote via Zoom
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109161
END:VEVENT
BEGIN:VEVENT
UID:79b35c48-5e09-47c9-81f2-e1ee47ecd35b
DTSTAMP:20200602T185815Z
CREATED:20200221T144510Z
DESCRIPTION:Topic: TBA\n\nSpeaker: Fani Dosopoulou\, Princeton University\n
\n
DTSTART:20200427T163000Z
DTEND:20200427T163000Z
LAST-MODIFIED:20200409T143647Z
LOCATION:Jadwin Hall\, Princeton Gravity Initiative\, 4th Floor
SUMMARY:Gravity Initiative Lunch - CANCELED
URL:https://www.ias.edu/node/109551
END:VEVENT
BEGIN:VEVENT
UID:01d2357d-73c2-4640-8f96-93cb0cc28307
DTSTAMP:20200602T185815Z
CREATED:20200402T184327Z
DESCRIPTION:Topic: Non-Perturbative Approaches to the Quantum Seiberg-Witte
n Curves\n\nSpeaker: Alba Grassi\, Stony Brook University\n\nIn this talk
I will revisit and connect various non-perturbative approaches to the quan
tization of the Seiberg-Witten curves. I will focus on the explicit exampl
e of N = 2\, SU(2) super Yang–Mills theory\, which is closely related to t
he modified Mathieu operator. I will then show how we can obtain a closed
formula for the Fredholm determinant and the spectral traces of this opera
tor.
DTSTART:20200428T190000Z
DTEND:20200428T190000Z
LAST-MODIFIED:20200402T184327Z
LOCATION:via web conference - TBA
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110361
END:VEVENT
BEGIN:VEVENT
UID:cc58d509-b5fc-4b8a-9e59-5ac684e7cd11
DTSTAMP:20200602T185815Z
CREATED:20200221T144624Z
DESCRIPTION:Topic: Statistical Inference of Dark Matter Substructure with W
eak and Strong Gravitational Lensing\n\nSpeaker: Siddharth Mishra-Sharma\,
New York University\n\nZoom link: bit.ly/phenoandvino\nAbstract: I will
describe two separate methods to statistically infer the properties of dar
k matter substructure using\, in turn\, (astrometric) weak and strong lens
ing observations. In the first part of the talk\, I will describe how the
motion of dark matter subhalos in the Milky Way induces a correlated patte
rn of motions in background celestial objects---known as astrometric weak
lensing---and how global signatures of these correlations can be measured.
These measurement can be used to statistically infer the underlying natur
e of substructure\, and I will show how this can be practically achieved w
ith future astrometric surveys and/or radio telescopes such as WFIRST and
the SKA. Next\, I will describe a novel method to disentangle the collecti
ve imprint of dark matter substructure on extended arcs in galaxy-galaxy s
trong lensing systems using likelihood-free (or simulation-based) inferenc
e techniques. This method uses neural networks to directly estimate the li
kelihood ratios associated with population-level parameters characterizing
substructure within lensing systems. I will show how this method can prov
ide an efficient and principled way to mine the large sample of strong len
ses that will be imaged by future surveys like LSST and Euclid to look for
signatures of dark matter substructure. I will emphasize how the statisti
cal inference of substructure using these techniques can be used to stress
-test the Cold Dark Matter paradigm and probe alternative scenarios such a
s scalar field dark matter and enhanced primordial fluctuations.
DTSTART:20200428T200000Z
DTEND:20200428T200000Z
LAST-MODIFIED:20200415T134118Z
LOCATION:Remote via Zoom
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/109556
END:VEVENT
BEGIN:VEVENT
UID:43652e7e-84bf-430d-a746-b927edccdd0b
DTSTAMP:20200602T185815Z
CREATED:20200107T151907Z
DESCRIPTION:Topic: Exploring Supermassive Black Holes\n\nUnfortunately\, du
e to the rapidly escalating health concerns relating to the spread of the
coronavirus disease (COVID-19) and in an abundance of caution\, we have de
cided to postpone the workshop until [October 14-16\, 2020](https://gravit
y.princeton.edu/events/princeton-gravity-initiative-pcts-workshop-explorin
g-supermassive-black-holes)
DTSTART:20200504T120000Z
DTEND:20200506T210000Z
LAST-MODIFIED:20200415T134550Z
LOCATION:
SUMMARY:Joint Princeton Gravity Initiative / PCTS Workshop - CANCELED
URL:https://www.ias.edu/node/107521
END:VEVENT
BEGIN:VEVENT
UID:8994e480-911f-4049-8c26-d4a3533d56a7
DTSTAMP:20200602T185815Z
CREATED:20190905T160001Z
DESCRIPTION:Topic: Exploring Supermassive Black Holes\n\nUnfortunately\, du
e to the rapidly escalating health concerns relating to the spread of the
coronavirus disease (COVID-19) and in an abundance of caution\, we have de
cided to postpone the workshop until October 14-16\, 2020
DTSTART:20200505T120000Z
DTEND:20200505T130000Z
LAST-MODIFIED:20200415T134727Z
LOCATION:
SUMMARY:Joint Gravity Initiative / PCTS Workshop - CANCELED
URL:https://www.ias.edu/node/104246
END:VEVENT
BEGIN:VEVENT
UID:2024faad-0c02-4da4-ae75-265f924d952e
DTSTAMP:20200602T185815Z
CREATED:20200402T184741Z
DESCRIPTION:Topic: Infrared Finite Cross Sections and S-matrix Elements\n\n
Speaker: Hofie Sigridar Hannesdottir\, Harvard University\n\nQuantum field
theory (QFT) works remarkably well for making theoretical predictions in
collider scattering experiments. One of the fundamental objects in these c
alculations\, the scattering matrix (S-matrix)\, is inspired by a well def
ined operator in non-relativistic quantum mechanics\, but is plagued with
both ultraviolet (UV) and infrared (IR) divergences in QFT. The UV diverge
nces are now understood through the program of renormalization\, but IR di
vergences remain an active area of research. We have explored three approa
ches to ameliorate the problem of IR divergences\, which will all be discu
ssed in this talk: i) The cross section method\, ii) modification of the S
-matrix\, and iii) the coherent state formalism. The minimal set of proces
ses required for a finite cross section as dictated by the KLN theorem wil
l be elaborated on\, along with examining a new approach based on factoriz
ation to define finite S-matrix elements in theories with massless particl
es and its connection to coherent states.
DTSTART:20200505T190000Z
DTEND:20200505T190000Z
LAST-MODIFIED:20200402T184741Z
LOCATION:via web conference - TBA
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110366
END:VEVENT
BEGIN:VEVENT
UID:abc3fb19-3a24-4442-b01b-ec3ae479daa2
DTSTAMP:20200602T185815Z
CREATED:20200304T143851Z
DESCRIPTION:Topic: Exploring Supermassive Black Holes\n\nUnfortunately\, du
e to the rapidly escalating health concerns relating to the spread of the
coronavirus disease (COVID-19) and in an abundance of caution\, we have de
cided to postpone the workshop until [October 14-16\, 2020](https://gravit
y.princeton.edu/events/princeton-gravity-initiative-pcts-workshop-explorin
g-supermassive-black-holes)
DTSTART:20200506T120000Z
DTEND:20200506T120000Z
LAST-MODIFIED:20200415T134811Z
LOCATION:
SUMMARY:Joint Princeton Gravity Initiative / PCTS Workshop - CANCELED
URL:https://www.ias.edu/node/110016
END:VEVENT
BEGIN:VEVENT
UID:2579bb6c-9d0d-4ec0-abe0-a662ff76afa1
DTSTAMP:20200602T185815Z
CREATED:20200402T184912Z
DESCRIPTION:Topic: Families of Hitchin Systems and N=2 Theories\n\nSpeaker:
Aswin Balasubramanian\, Rutgers University\n\nAbstract: Over the last few
years\, the connection between 4d N=2 theories and Hitchin systems has le
d to a robust exchange of ideas between physics and mathematics. In my tal
k\, I will explain how to extend this dictionary to one between 4d N=2 phy
sics and the SL_N Hitchin system on a nodal UV Curve. I will then use this
dictionary to clarify certain questions concerning Coulomb branches of th
e corresponding Class S theories at various boundaries of the space of mar
ginal parameters. In mathematical terms\, I will describe tame SL_N Hitchi
n systems as a flat family of integrable systems over \bar{M}\, the Delign
e-Mumford moduli space of the UV Curve. This is based on upcoming work wit
h J. Distler and R. Donagi.
DTSTART:20200512T190000Z
DTEND:20200512T190000Z
LAST-MODIFIED:20200501T194350Z
LOCATION:via web conference - TBA
SUMMARY:Rutgers NHETC Seminar
URL:https://www.ias.edu/node/110371
END:VEVENT
BEGIN:VEVENT
UID:8f839758-0de8-42c5-84b8-6ab3bdaef094
DTSTAMP:20200602T185815Z
CREATED:20200501T194141Z
DESCRIPTION:Topic: Probing Dark Matter with Cosmic-Ray Antiprotons\n\nSpeak
er: Jan Heisig\, CP3 UC Louvain\n\nZoom link: bit.ly/phenoandvino\nAbstra
ct: Cosmic-ray observations provide a powerful probe of dark-matter annihi
lation in the Galaxy. In this talk I present recent analyses of the AMS-02
antiproton data\, reducing cosmic-ray propagation uncertainties by fittin
g at the same time dark-matter and cosmic-ray propagation parameters. The
resulting bounds are among the strongest for heavy dark matter\, while for
smaller masses\, around or below 100 GeV\, the analysis exhibits a possib
le hint for an annihilation signal. Interestingly\, the signal is compatib
le with a thermal annihilation cross section for frozen-out dark matter as
well as a dark-matter interpretation of the gamma-ray Galactic center exc
ess. We examine the robustness of this hint by studying the effect of the
most important systematic uncertainties: the antiproton production cross s
ections needed to calculate the source spectra of secondary antiprotons an
d the potential correlations in the experimental measurements\, so far not
provided by the AMS-02 Collaboration. While the impact of production cros
s-section uncertainties is mild\, correlation in the AMS-02 data turn out
to be decisive and can largely alter the significance of the finding in bo
th directions. The dominant systematics in the rigidity region of interest
\, around 10-20 GV\, arises from uncertainties in the cross sections for c
osmic-ray absorption in the AMS-02 detector\, the measured flux is correct
ed for. We compute the corresponding correlations by a careful re-evaluati
on of the involved absorption cross sections within the Glauber-Gribov mod
el. These correlations diminish the statistical preference for the additio
nal contribution from dark matter. At the same time they enable to further
exploit the precision of the AMS-02 data in order to constrain cosmic-ray
propagation models.
DTSTART:20200512T200000Z
DTEND:20200512T200000Z
LAST-MODIFIED:20200501T194141Z
LOCATION:Remote via Zoom
SUMMARY:Pheno & Vino Seminar
URL:https://www.ias.edu/node/110821
END:VEVENT
END:VCALENDAR