[f(k)] Fw: Tomorrow (!): Gabor David: Is yesterday's calibration today's discovery? In the physics colloquium

[Antero Voutilainen]

Hello all!

Notice that physics colloquium is tomorrow thursday at 10 am.

Sincerely,

Antero Voutilianen
Chairman
F(k)

------ Forwarded Message --------
From: Tero Tapio Heikkilä <tero.t.heikkila at jyu.fi>
Date: 24.5.2023 9.00.34
Subject: Tomorrow (!): Gabor David: Is yesterday's calibration today's discovery? In the physics colloquium
To: jyflstaff at korppi.jyu.fi, Antero Voutilainen <puheenjohtaja at jyfk.fi>

Welcome to the University of Jyväskylä physics colloquium.

On Thursday (note the time!) 25th May at 10 am in FYS1 and Zoom [https://jyufi.zoom.us/j/66703175507] (passcode 890524):
Gabor David, Stony Brook
Is Yesterday's calibration today's discovery?

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).
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.
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.  If so, what are the consequences?
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?
Welcome!
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.

Do you wish to suggest further topics for the colloquium? You can do so at Café JYFL [https://jyu.sharepoint.com/:w:/r/sites/CafJYFLDepartmentofPhysics/Jaetut%20asiakirjat/General/Physics%20colloquium%20ideas.docx?d=w888a107ea28543c7a9bc331f12a99995&amp;csf=1&amp;web=1&amp;e=r5iubT].
There are still some open slots (and budget) for the spring and a lot more for the fall, so suggestions are welcome.
We will have one more colloquium before the summer:

2.6. Mikko Möttönen (Aalto): TBA

Tero & Iain

-- Tero Heikkilä Professor, Department of Physics University of Jyväskylä

-- 
Avast-virustorjuntaohjelmisto on tarkastanut tämän sähköpostin virusten varalta.
www.avast.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.jyu.fi/pipermail/fyysikkokerho/attachments/20230524/35361a2b/attachment.html>