<html><head></head><body style="zoom: 0%;"><div class="gmail_quote" ><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>De: <strong class="gmail_sendername" dir="auto">segreteria GGI</strong> <span dir="auto"><<a href="mailto:segreteriaggi@fi.infn.it">segreteriaggi@fi.infn.it</a>></span><br>Date: lun, 15 mar 2021 a las 6:56<br>Subject: GGI Tea Breaks - Adam Riess & Licia Verde - Wed. March 17th - 4:00PM CET (NOTICE OF CHANGE OF TIME)<br>To: <<a href="mailto:ggi.participants@lists.fi.infn.it">ggi.participants@lists.fi.infn.it</a>>, <<a href="mailto:ggi.students@lists.fi.infn.it">ggi.students@lists.fi.infn.it</a>><br></div><br><br>
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<p>Dear all,</p>
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<p>we
are happy to
announce a new
Focus Meeting
on the theory
of fundamental
interactions
within the <b>GGI
Tea Breaks’</b> series. <br>
It will take
place via Zoom
at <a href="https://infn-it.zoom.us/j/86302343715" target="_blank">https://infn-it.zoom.us/j/86302343715</a></p>
<p>on</p>
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<p><b>Wednesday
March 17th </b>at<b> <u>4:00
PM</u> </b>(CET)
<b><u>(NOTICE
OF CHANGE OF
FOCUS MEETING
TIME)</u></b><br>
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<p>
and will be
given by </p>
<p><span style="text-align:center;background-color:rgb(255,255,255)"><b>Adam
Riess </b><span>(Johns
Hopkins Univ.)</span><b> </b><span>&</span><b>
Licia Verde </b>(ICREA) </span></p>
<p>They
will talk
about <font><span style="text-align:center;background-color:rgb(255,255,255)"><span><b> "The
trouble with
H0"</b></span></span></font></p>
<p>Abstract:<font><b> </b></font><font style="font-size:14px"><span style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">The
Hubble
constant H0 is
one of the
most important
parameters in
the
cosmological
model, setting
the size and
age scales of
the Universe.
The distance
ladder relying
on supernovae
yields values
of H0 higher
than those
inferred from
the inverse
distance
ladder, which
is instead
based on
early-time
physics and
relies on
observations
typically
involving the
cosmic
microwave
background, in
combination
with galaxy
surveys. Such
discrepancy
has come to be
known as the
'Hubble
tension'. In
this Focus
Meeting Adam
Riess and
Licia Verde
will
illustrate the
different
methods of
measurement of
H0, and
analyze
possible
resolutions of
the Hubble
tension.</span><br style="box-sizing:inherit;font-style:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">The
Hubble tension
has motivated
the
exploration of
extensions to
the standard
cosmological
model in which
higher values
of H0 can be
obtained from
CMB
measurements
and galaxy
surveys. The
trouble,
however, goes
beyond H0;
such
modifications
affect other
quantities
too, such as
cosmic times
and the matter
density. Any
Hubble trouble
has
implications
well beyond H0
itself. Licia
Verde will
analyze the
tension in
both a
model-dependent
and a
model-independent
way, and will
propose a new
representation
of parameter
constraints
that,
hopefully,
will help us
find a
resolution.</span><br style="box-sizing:inherit;font-style:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="font-style:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">A
streamlined
distance
ladder
constructed
from infrared
observations
of Cepheids
and type Ia
supernovae
with ruthless
attention paid
to systematics
now provides
< 2%
precision and
offer the
means to do
much better.
By steadily
improving the
precision and
accuracy of
the Hubble
constant, we
now see
evidence for
significant
deviations
from the
standard
model,
referred to as
LambdaCDM, and
thus the
exciting
chance, if
true, of
discovering
new
fundamental
physics such
as exotic dark
energy, a new
relativistic
particle, or a
small
curvature to
name a few
possibilities.
Adam Riess
will review
recent and
expected
progress, most
recently based
on
measurements
from Gaia EDR3
released in
December,
2020.</span><span style="text-align:justify"></span><span style="text-align:justify"> </span></font></p>
<p>Ample
space for
questions and
discussion
will be
allocated at
the end of the
Focus Meeting.
We have also
created an
online Q&A
space for each
seminar. You
can submit
your question
by filling
the <a href="https://docs.google.com/forms/d/e/1FAIpQLSfskqHeUko1e_GxLng6fDquV4JANEZQARIa2m9YF_voyxs6JQ/viewform" target="_blank">form</a>.
The answers
will be
published soon
after.</p>
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<div>For
more info see
<a href="https://www.ggi.infn.it/seminars" target="_blank">https://www.ggi.infn.it/seminars</a></div>
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<div>Please
forward this
announcement
to anyone who
might be
interested.</div>
<div>We
wait for your
participation,</div>
<p>
The Organising
Committee of
the GGI Tea
Breaks</p>
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