<div id="__MailbirdStyleContent" style="font-size: 10pt;font-family: Arial;color: #000000;text-align: left" dir="ltr">
Hello all!<div><br></div><div>Notice that physics colloquium is <b>tomorrow</b> thursday at 10 am.</div><div><br></div><div>Sincerely,</div><div><br></div><div>Antero Voutilianen</div><div>Chairman</div><div>F(k)<br><div class="mb_sig"></div><div class="history_container"><p style="color: margin-top: 10px;">------ Forwarded Message --------<br>From: Tero Tapio Heikkilä <tero.t.heikkila@jyu.fi><br>Date: 24.5.2023 9.00.34 <br>Subject: Tomorrow (!): Gabor David: Is yesterday's calibration today's discovery? In the physics colloquium <br>To: jyflstaff@korppi.jyu.fi, Antero Voutilainen <puheenjohtaja@jyfk.fi><br></p><div style="font-family:Arial,Helvetica,sans-serif">
Welcome to the University of Jyväskylä physics colloquium. <br>
<div class="moz-forward-container">
<p> On <b>Thursday</b> (note the time!) 25th May at 10 am in FYS1
and <a href="https://jyufi.zoom.us/j/66703175507" moz-do-not-send="true">Zoom</a> (passcode 890524):</p>
<p class="MsoNormal"><b>Gabor David</b>, Stony Brook</p>
<p class="MsoNormal"><span style="font-size: 12.0pt" lang="EN-US"><b><i>Is
Yesterday's calibration today's discovery?</i></b><br>
</span></p>
<p class="MsoNormal"><span style="font-size: 10pt"><span style="font-size: 12.0pt" lang="EN-US">Discovery of the Z-boson 40 years ago was a
huge feat, but soon afterwards the Z was already used to
actually calibrate high-energy response of detectors,
prompting the adage that "Yesterday's discovery is today's
calibration" (and tomorrow's background, as some added).</span></span></p>
<span style="font-size: 10pt"> </span>
<p class="MsoNormal"><span style="font-size: 10pt"><span style="font-size: 12.0pt" lang="EN-US">Jet quenching observed at RHIC in Au+Au
collisions was widely accepted as a sign of Quark-Gluon
Plasma (QGP) formation once the 2003 reference measurement
("calibration") with d+Au has shown no such suppression.
This was in line with expectations, since it was firmly
believed back then that in such "small systems" the overlap
volume is not sufficient to allow the formation of a
deconfined partonic phase.</span></span></p>
<span style="font-size: 10pt"> </span>
<p class="MsoNormal"><span style="font-size: 10pt"><span style="font-size: 12.0pt" lang="EN-US">This state of affairs changed radically after
2012, when much larger datasets, including p+Pb at LHC have
shown suppression in central collisions in "small systems",
and later even elliptic flow, another hallmark of the QGP.
However, all this came at the price of a misterious
enhancement in peripheral yields. This prompted the idea
that maybe the way we classify events experimentally - i.e.
map the theoretical impact parameter to experimental
observables – breaks down in case of "small systems"
collisions. </span><span style="font-size: 12.0pt">If so,
what are the consequences?</span></span></p>
<span style="font-size: 10pt"> </span>
<p><span style="font-size: 10pt"><span style="font-size: 12.0pt" lang="EN-US">In
this talk we will walk through the history and present
status of how "small system" collisions evolved from their
original, almost boring "reference" role to one of the
hottest and most debated topic of the day in heavy ion
physics, and report on some recent efforts that might help
answer the question: is there indeed a discovery - or just
another, so far unnoticed experimental bias?</span></span></p>
<p>Welcome!</p>
<p> Coffee will be served in the lobby. Although on-site
attendance is the preferred option, you can also join via Zoom.
Please do not send chat messages in Zoom during the talk, except
if you need to tell about a muted speaker. <br>
</p>
<p>Do you wish to suggest further topics for the colloquium? You
can do so at <a href="https://jyu.sharepoint.com/:w:/r/sites/CafJYFLDepartmentofPhysics/Jaetut%20asiakirjat/General/Physics%20colloquium%20ideas.docx?d=w888a107ea28543c7a9bc331f12a99995&csf=1&web=1&e=r5iubT" moz-do-not-send="true">Café JYFL</a>.</p>
<p>There are still some open slots (and budget) for the spring and
a lot more for the fall, so suggestions are welcome.</p>
<p>We will have one more colloquium before the summer:<br>
</p>
<p> 2.6. Mikko Möttönen (Aalto): TBA <br>
</p>
<p>Tero & Iain<br>
</p>
<p><span style="font-size: 12.0pt" lang="EN-US"></span></p>
<pre class="moz-signature" cols="72">--
Tero Heikkilä
Professor, Department of Physics
University of Jyväskylä</pre>
</div>
</div></div>
</div></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br /><table style="border-top: 1px solid #D3D4DE;"><tr><td style="width: 55px; padding-top: 13px;"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><img src="https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif" alt="" width="46" height="29" style="width: 46px; height: 29px;"/></a></td><td style="width: 470px; padding-top: 12px; color: #41424e; font-size: 13px; font-family: Arial, Helvetica, sans-serif; line-height: 18px;">Ei viruksia.<a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank" style="color: #4453ea;">www.avast.com</a></td></tr></table><a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"> </a></div>