BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Luca Visinelli (GRAPPA\, University of Amsterdam\, Netherlands)
DTSTART:20200429T150000Z
DTEND:20200429T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/1
DESCRIPTION:Title: Astrophysics with axion miniclusters and axion stars\nby Luc
a Visinelli (GRAPPA\, University of Amsterdam\, Netherlands) as part of La
tin American Webinars on Physics (LAWPhysics)\n\n\nAbstract\nAxions and ax
ion-like particles are excellent dark matter candidates\, spanning a vast
range of mass scales from the milli- and micro-eV for the QCD axion\, to 1
0^-22eV for ultralight axions\, to even lighter candidates that make up th
e “axiverse”. In some scenarios\, inhomogeneities in the axion density
lead to the formation of compact structures known as axion “minicluster
s” and axion stars. Topological defects in the early universe might also
contribute the energy density of axions and generate primordial gravitati
onal waves that can possibly be detected in future experiments. I will fir
st discuss astrophysical and cosmological constraints on axions at either
end of this spectrum\, using data from the cosmic microwave background ani
sotropies and the effects of miniclusters on the gravitational microlensin
g and on direct detection. I will then assess the evolution of the hypothe
tical “axion stars”.\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Luca Visinelli (GRAPPA\, University of Amsterdam\, Netherlands)
DTSTART:20200429T150000Z
DTEND:20200429T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/2
DESCRIPTION:Title: Astrophysics with axion miniclusters and axion stars\nby Luc
a Visinelli (GRAPPA\, University of Amsterdam\, Netherlands) as part of La
tin American Webinars on Physics (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Macarena Lagos (University of Chicago)
DTSTART:20200506T150000Z
DTEND:20200506T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/3
DESCRIPTION:Title: Cosmology in the multi-messenger era\nby Macarena Lagos (Uni
versity of Chicago) as part of Latin American Webinars on Physics (LAWPhys
ics)\n\n\nAbstract\nWe have great certainty on how gravity works around ou
r solar system\, but on large scales we still have a considerable lack of
understanding about the constituents of our universe. Furthermore\, observ
ational tensions are starting to arise as we enter the era of precision co
smology.\nIn this talk\, I will mention how we can learn more about cosmol
ogy with future gravitational wave data. In particular\, I will focus on t
he use of standard sirens for testing cosmology beyond the concordance ΛC
DM model. I will show how new physics can change the way gravitational wav
es propagate and discuss forecasts for binary neutron star mergers with Ad
vanced LIGO. I will show that new physics can bias constraints on the curr
ent Hubble rate H0 from standard sirens\, and thus it is crucial that we s
earch for these new effects to make robust predictions on cosmological par
ameters. Finally\, I will discuss the role that lunar laser ranging and bi
nary pulsar data play on the outlook of standard sirens.\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ezequiel Álvarez (International Center for Advanced Science)
DTSTART:20200513T150000Z
DTEND:20200513T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/4
DESCRIPTION:Title: Intelligent Arxiv: Sort daily papers by learning users topics pr
eference\nby Ezequiel Álvarez (International Center for Advanced Scie
nce) as part of Latin American Webinars on Physics (LAWPhysics)\n\n\nAbstr
act\nCurrent daily paper releases are becoming increasingly large and area
s of research are growing in diversity. This makes it harder for scientist
s to keep up to date with current state of the art and identify relevant w
ork within their lines of interest. The goal of this article is to address
this problem using Machine Learning techniques. We model a scientific pap
er to be built as a combination of different scientific knowledge from div
erse topics into a new problem. In light of this\, we implement the unsupe
rvised Machine Learning technique of Latent Dirichlet Allocation (LDA) on
the corpus of papers in a given field to: i) define and extract underlying
topics in the corpus\; ii) get the topics weight vector for each paper in
the corpus\; and iii) get the topics weight vector for new papers. By reg
istering papers preferred by a user\, we build a user vector of weights us
ing the information of the vectors of the selected papers. Hence\, by perf
orming an inner product between the user vector and each paper in the dail
y Arxiv release\, we can sort the papers according to the user preference
on the underlying topics.\nWe have created the website IArxiv.org where us
ers can read sorted daily Arxiv releases (and more) while the algorithm le
arns each user's preference\, yielding a more accurate sorting every day.
Current IArxiv.org version runs on Arxiv categories astro-ph\, gr-qc\, hep
-ph and hep-th and we plan to extend to others. We propose several new use
ful and relevant implementations to be additionally developed as well as n
ew Machine Learning techniques beyond LDA to further improve the accuracy
of this new tool.\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lucía Duarte (Universidad de la República)
DTSTART:20200520T150000Z
DTEND:20200520T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/5
DESCRIPTION:Title: Majorana neutrinos with effective interactions in B decays\n
by Lucía Duarte (Universidad de la República) as part of Latin American
Webinars on Physics (LAWPhysics)\n\n\nAbstract\nWe investigate the possibl
e contribution of intermediate Majorana neutrinos to B meson decays in an
interaction formalism with dim 6 effective operators. We exploit the exist
ing bounds on the lepton number violating B^- -> mu^-mu^- pi^+ and in th
e radiative B^- -> mu^- nu gamma decays to constrain the new physics co
ntributions\, characterized by their Dirac-Lorentz structure. We propose s
tudying tau lepton polarization and lepton-photon angular asymmetries in t
auonic and radiative B decays at B factories as a means to evaluate and d
isentangle the trails of the distinct effective operators\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sean Hartnoll (Stanford)
DTSTART:20200603T160000Z
DTEND:20200603T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/7
DESCRIPTION:Title: Quantum gravity and matrix quantum mechanics.\nby Sean Hartn
oll (Stanford) as part of Latin American Webinars on Physics (LAWPhysics)\
n\n\nAbstract\nSpace is widely believed to be emergent. That is\, the fund
amental degrees of freedom in quantum gravity are not geometrical. Due to
holographic duality\, we know that large N matrix quantum mechanics are mi
croscopic models that can lead to an emergent space. However\, in general
these models are difficult to solve and for this reason we don’t really
understand how this emergence works. I will describe two recent approaches
to solving large N matrix quantum mechanics\, one uses neural networks\,
while the other uses a “bootstrap” approach.\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jose Tomas Galvez Ghersi (University of Mississippi)
DTSTART:20200617T150000Z
DTEND:20200617T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/8
DESCRIPTION:Title: Numerical renormalization group-based approach to secular pertur
bation theory\nby Jose Tomas Galvez Ghersi (University of Mississippi)
as part of Latin American Webinars on Physics (LAWPhysics)\n\n\nAbstract\
nThe standard methods of perturbative analysis are crucial to revealing ma
ny features of a physical system when it is not viable to obtain exact sol
utions. Nevertheless\, the use of a truncated expansion might generate div
erging solutions in systems that are known to be bound. Following the pers
pective of secular perturbation theory\, we propose the numerical implemen
tation of a renormalization group-based approach to promote the background
parameters into time-dependent quantities. These new quantities are not r
estricted only to avoid secular growth\, but can also improve the accuracy
of the solution. As a concrete example\, we use this method to calculate
the soliton-like solutions of the Korteweg-de Vries equation deformed by a
dding a small damping term. This example shares several features with the
evaluation of gravitational waveforms modified by perturbative corrections
of general relativity.\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Carlos Alvarado
DTSTART:20200708T100000Z
DTEND:20200708T120000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/9
DESCRIPTION:by Carlos Alvarado as part of Latin American Webinars on Physi
cs (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paola Ferrario
DTSTART:20200715T100000Z
DTEND:20200715T120000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/10
DESCRIPTION:by Paola Ferrario as part of Latin American Webinars on Physic
s (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rai Weiss (MIT)
DTSTART:20200930T150000Z
DTEND:20200930T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/11
DESCRIPTION:by Rai Weiss (MIT) as part of Latin American Webinars on Physi
cs (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kip Thorne (Caltech)
DTSTART:20201111T150000Z
DTEND:20201111T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/12
DESCRIPTION:by Kip Thorne (Caltech) as part of Latin American Webinars on
Physics (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hardi Veermäe (NICPB\, Tallinn)
DTSTART:20201028T150000Z
DTEND:20201028T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/13
DESCRIPTION:by Hardi Veermäe (NICPB\, Tallinn) as part of Latin American
Webinars on Physics (LAWPhysics)\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:James Stone (IAS)
DTSTART:20220119T150000Z
DTEND:20220119T160000Z
DTSTAMP:20260404T111005Z
UID:lawphysics/14
DESCRIPTION:Title: Numerical Models of Black Hole Accretion Flows\nby James St
one (IAS) as part of Latin American Webinars on Physics (LAWPhysics)\n\nAb
stract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/lawphysics/14/
END:VEVENT
END:VCALENDAR