mercoledì 4 luglio 2012

Dicono al CERN


Post molto sperimentale: tento di riportare i tweets che giungono dal CERN, in particolare conto su Marco Delmastro che si sta già attivando.

Marco Delmastro:
Good morning world. It's 5:30 and I'm heading to #CERN. Given what I ready about #occupyCERN and the people queuing, I doubt I'll get in :-(

ATLAS Experiment:
Peter Jenni during press briefing in Melbourne showing Peter #Higgs in #ATLAS #ICHEP2012 http://pic.twitter.com/4Deziog7

Marco Delmastro:
It's 7:38, and I'm inside Auditorium. That was thought (but I'm italian :-) )

Marco Delmastro:
Your neighbor physicist is ready to tweet #Higgs #CERN #ICHEP2012 http://pic.twitter.com/7Npdd3jc

Marco Delmastro:
Inside #Cern Auditorium waiting for the #Higgs seminar to start @ Cern Main Auditorium http://instagr.am/p/Mpc07KMOiK/

Marco Delmastro:
Half of the #CERN Auditorium is reserved for VIP physicists. Knowing who remained outside, I'm wondering how these place were assigned! #WTF

Marco Delmastro:
I see Summer Students in #CERN Auditorium, and I know people working on #ATLAS and #Higgs since 20 years outside. This ain't right.

Marco Delmastro:
Un nuovo post: La giornata sarà lunga http://www.borborigmi.org/2012/07/04/la-giornata-sara-lunga/

Gianluigi Filippelli:
Are we close to discovering the Higgs Boson?
http://docmadhattan.fieldofscience.com/2012/07/are-we-close-to-discovering-higgs-boson.html

Marco Delmastro:
It's 16:39 in Melbourne, and people are gathering in the #ICHEP2012 conf room to follow the #CERN #Higgs seminar. We see you form here!

Comincio a chiedermi se non vi convenga andare su Twitter; e non ho una risposta ;-)

Marco Delmastro:
Francois Englert and six ex-CERN DGs are in the Auditorium. Waiting for Peter Higgs to show up!

Posso migliorare una cosa: lasciare attivi gli #hashtag, se ci riesco.

Marco Delmastro:
Just drinking coffee for the time being. I wonder when we could drink some kind of alcohol (it will soon be 5PM in Melbourne no?)

Peppe Liberti:
live blog sull'higgs

Marco Delmastro:
minutes to go, and I see a fair concentration of ties (rather unusual for physicists) in the front rows.

Marco Delmastro:
Well, I am myself wearing a shirt today. And no sandals :-)

Marco Delmastro:
Peter Higgs enter the room!

Gianluigi Filippelli:
DocMadhattan: Are we close to discovering the Higgs Boson?

Marco Delmastro:
Peter and Francois get the first ovation. Kind of sad Robert cannot be here today at

Marco Delmastro:
Silence before the storm

ATLAS Experiment:
2 minute warning for Update Seminar. Everyone at and in Melbourne are waiting in anticipation.

Marco Delmastro:
DG Rolf Heuer opens the dances. There will be questions after the first talk, only after both & has presented  the results

Marco Delmastro:
is starting woth Joe Incandela

Gianluigi Filippelli:
Joe Incandela, spokesperson, presents an update on the search via

Marco Delmastro: 
Several results will be showed today, but more details will be given at . ttH channel is a good example of those...

Marco Delmastro:
Given the sensitivity for the different decay channels, with the data we have we are able to exclude a SM . Today.

Gianluigi Filippelli:
People to follow: (italian)

Marco Delmastro: 
CMs can use slighly more than 5/fb for analyses, and even more (about 6/fb) for muon-only channels.

Marco Delmastro: 
ECAL has ~1 GeV resolution after corrections for crystal response variation. On paper they could better, but it's certainly enough 

Marco Delmastro: 
has a veeery fast MonteCarlo! Hat tip to them for that, MC is definitively slower... 

Marco Delmastro:  
Multi Variate lepton selection can given 30% improvement wrt to cut-based selection!

Stefano Bagnasco:
La finale di coppa 
La fisica mondiale oggi si ferma per guardare la finale di Coppa del Mondo di Bosone di Higgs, in diretta dal CERN qui. Il prof. S.C. con il suo consueto tempismo è in treno e la rete del Frecciarossa è quella che è, ma per esempio c'è Marco che si è alzato presto e twitta in diretta. 

Marco Delmastro:
"Pileup" is the superposuition of several proton-proton collisions at the same time. The physicists nightmare, but tamed in 2012  

Marco Delmastro: 
SM redicocered by CMS to high precision. The road to is paved!

Marco Delmastro:
diphoton analysis uses MVA categories to improve by 15% sensitivity wrt to cut-based analysis. As in 2011, has VBF 2-jets 
category

ATLAS Experiment:
Full house in Melbourne as participants watch the search results presented at via webcast.

Marco Delmastro:
Joe flashed the inclusive diphton spectrum. While not used for final results, one could spot a peak…

Gianluigi Filippelli:
Screenshots from CMS talk: Standard Model

Marco Delmastro:
Here it comes the diphoton vertexing (where they are weaker than ). Despite pileup, they still do well...

CMS Experiment CERN:
seminar : Joe explains one tough cookie in the search with photons: find out where they were produced.

ATLAS Experiment:
physicists, among others, want to know if sees what they see!

Gianluigi Filippelli:
Screenshot from CMS talk: gamma-gamma channel overview

Marco Delmastro:
Uh, the category diphoton spectra! One can see several peaks… Let's see where this leads...

Marco Delmastro:
That excess is definitively significant!

Beatrice Mautino:
Ci siamo!

Marco Delmastro:
The p-value is the probability of the background to mimic a signal. The smaller is is, the more the signal is believable

Marco Delmastro:
had 4-sigma signal in diphoton channel

Gianluigi Filippelli:
Screenshot from CMS talk: the exclusion for SM Higgs (look it!)

ATLAS Experiment:
presents a combined two-photon mass plot indicating a 4.1 sigma significance around 125 GeV

Marco Delmastro:
And now the H->ZZ->4l channel…

Marco Delmastro:
That's definitively a peak

CMS Experiment CERN:
Animated event display! " collision event at CMS showing two photons - 8 TeV (CMS search)"

Marco Delmastro:
4 leptons channel has 3.3 sigma singificance at ~125 GeV (slightly lowet then expected)

Gianluigi Filippelli:
Screenshot from CMS talk: fitted signal

ATLAS Experiment:
can also decay to 2 Z bosons, each decaying to 2 muons or 2 electrons. display 4-lepton mass spectrum with 3.2 sigma excess.

Marco Delmastro:
5 f**cking sigmas! Combining 2011 and 2012 diphoton and 4-leptons channels

Gianluigi Filippelli:
Incredible... 5.0 sigma for ZZ+gg...

A iè? ;-)

Marco Delmastro:
presents the WW channel. Defintively more complicated

ATLAS Experiment:
Combination of 2-photon and 4-lepton channels comes to 5 sigma. Applause from physicists at and . 

Marco Delmastro:
Wait! Maybe does not see anything, and the 5-sigmas are an experimental problem :-)

Marco Delmastro:
Adding that WW channels brings 5 sigmas to 5.1 (5.2 expected). There's no room for doubt…

ATLAS Experiment:
All eyes now turn to spokesperson Fabiola Gianotti, as she presents results. Are they the same? Info to be posted at atlas.ch

Marco Delmastro:
H->tautau channel has a small *deficit* around where you would expect an exces. Ok, it's not that sensible, but stil…

Marco Delmastro:
Is what see the SM boson? Looks rather compatible given the signal strengths. More data will tell better…

Marco Delmastro:
The diphoton channel has an excess larger by a factor 2 wrt what the SM predicts. Let's what sees…

Mark Tibbetts:
"We have observed a new boson with a mass of 125.3+/-0.6GeV at 4.9sigma significance"

Marco Delmastro:
Forza Fabiola!

Scientificast.it:
Conclusione dell'intervento di Incandela, portavoce di : "Abbiamo osservato un nuovo bosone con una massa di...

Gianluigi Filippelli:
The conclusion of CMS talk: nearest to the discovery!!!

Marco Delmastro: 
will only show updated 2012 results for H->gammagamma and H->ZZ->4l. Would they be enough?

Marco Delmastro:
One has to be stronger to be more cautious!

Gavin McCance:
Fabiola uses again. Outstanding!

Marco Delmastro:
That's my baby! The ECAL! Look how well it behaves! My child! :-)

Marco Delmastro:
I like that Fabiola spends time to review experimental issue like trigger. Results and discovery don't pop-up out of the blue!

ATLAS Experiment:
Physicists at watch spokesperson Fabiola Gianotti present results. Do they line up with ?

Marco Delmastro:
Lost network in Auditorium!!! ?

ATLAS Experiment:
thanks the efforts of the world-wide for making it possible to process a quadrillion events during the past two years.

Marco Delmastro:
Fabiola has a word for all teams in . That's a spokesperson! No results will be possibile w/o all groups!

Marco Delmastro:
Uff, network is back in time for the meat of the results!

Marco Delmastro:
Now the 2012 H->gammagamma results!

Phil Plait:
Y'all can make fun of Comic Sans all you want when *you* discover a fundamental new particle that's a key to modern physics.

ATLAS Experiment:
Plots and Event Displays now available at

Marco Delmastro: 
To see in diphoton channel you need good energy resolution, and excelllent photon identification.

Marco Delmastro: 
The problem is that the majority of photons in pp collisions don't came from decay!  

Marco Delmastro: 
does not depend on tracking to know where the photons come from. The ECAL is longitudinally segmented, can see the direction!

Gianluigi Filippelli: 
ATLAS screenshot: mass resolution

Marco Delmastro:
I think I'm going to cry. Seriously. Most of us have been working all their professional lifes for this

ATLAS Experiment: 
uses excellent mass resolution to find narrow two-photon signal in search.

Marco Delmastro:
Look how flat that right plot on slide 22 is! Look at it!

Marco Delmastro:
Do you see the bump? Do you see it? (I;m getting emotional, I know)

ATLAS Experiment:
Beautiful four-electron event display from searches with

Marco Delmastro:
We have 4.5 f*king sigmas in the# Higgs->gamma gamma channel only! Four Point Five!

Marco Delmastro: 
->GammaGamma results is twice as strong as expected form Standard Model. What are we seeing?

ATLAS Experiment: 
Animation of real candidate event in the detector  

Marco Delmastro: 
Is is already 5PM somewhere in the world?  

Marco Delmastro: 
Now the H->ZZ->4l in Higgs  

Marco Delmastro: 
As for photons, it takes a lot of work to select electron and muons with large efficiency.  

ATLAS Experiment: 
' Fabiola Gianotti emphasizes improvements to analyses allowing efficient reconstruction of 4-lepton channels.

Marco Delmastro: 
The long awaited mass plot in 4 leptons. See any bump? :-)  

ATLAS Experiment: 
2012 Event Displays and Plots supporting searches available at  

Marco Delmastro: 
I'm on the top left, blue short! RT : auditorium, live on repubblica.it, cc

Marco Delmastro: 
Ehi! sees the Z peak. Anything else? :-)  

Marco Delmastro: 
Fabiola is extremely good at teasing!  

ATLAS Experiment: 
reveals significant excess of events in 4-lepton search. Same location as 2011 excess and as !

Marco Delmastro: 
has 3.4 sigmas in 4 leptons channel 2011+2012! Again slighlty higher than in SM

Kathryn Jepsen: 
Fabiola Gianotti is a boss. "Only 7 minutes [left in the talk]? ...I'm sure you will not stop me before the final slide."  

Marco Delmastro: 
"Total blackout everywhere". Fabiola rules!  

codicecultura: 
Higgs, c'è! Ci uniamo agli applausi della sala. Grandi! 

ATLAS Experiment: 
results indicate significant excess in both 2-photon and 4-lepton channels. Statement can be found at

Marco Delmastro:
also has 5 f*cking sigmas!!! With 2 new channels only!

Marco Delmastro: 
We find it. WE FIND IT. Now I can cry  

Seth Zenz: 
Hearty applause for in ATLAS as well. We've discovered something, no question at all!  

ATLAS Experiment: 
Spontaneous applause in Europe and Australia as physicists celebrate 5-sigma signals in and in searches  

Marco Delmastro: 
This has been along story… This discovery come from very far!  

Marco Delmastro: 
This is just the beginning  

Gianluigi Filippelli: 
I think that... ATLAS is better!  

ATLAS Experiment: 
What is next for and ? "We need more data" says Fabiola Gianotti to measure what we have found.  

Alain: 
"We are entering the era of Higgs measurements"  

Gianluigi Filippelli:
And ATLAS results confirm CMS results (I repeat: their presentation and results seem better)

Marco Delmastro:
Thanks Nature!

Marco Delmastro: 
DG: "I think we have it. Do you agree?" Applause follows…

peppe liberti: 
vedere le lacrime di Higgs, accidenti

ATLAS Experiment: 
Director General Rolf-Dieter Heuer gets and audiences to agree that "we have something"!

Gianluigi Filippelli:
Emotion!!!


ATLAS Experiment: 
Loud applause from "Down Under" as Q&A begins following a historical video-link seminar

ATLAS Experiment: 
CERN's Director Rolf Heuer: "This historic milestone is only the beginning, it has global implications for the future". Standing ovation!

ATLAS Experiment:
Android App LHSee already updated with real decay candidates

Gianluigi Filippelli: 
The ATLAS excess

Marco Delmastro:
Peter and Fracois will say something now...

Marco Delmastro:
Congratulasions from Peter ! He's happy this happened in his lifetime!!!

Gianluigi Filippelli: 
Francois "Extraordinary presentations!"

ATLAS Experiment: 
and in auditorium. Englert notes that they only "started it". Impressed with job of in completing it.

Marco Delmastro: 
Wasn't it worth to wait until today?

ATLAS Experiment: 
expressed gratitude that this event happened during his lifetime.

Qualche tweet l'ho trovato grazie a Giuliana Galati

Ennio:
In realtà il Bosone di Higgs è Voltorb.

Alberto.Microsatira 
Cern esulta, scoperto il bosone di . Prossime sfide: trovare il neurone di Gasparri, la sinistra in Italia e il punto G della Fornero.

ATLAS Experiment: 
celebrates its highly successful search. But could it be that they found it before? ?

Pare sia finita la sessione. Se del caso ci faccio un altro post, due al prezzo di uno. Non vi dico però che faticaccia!
E poi Jakob Nielsen, massimo esperto in usabilità, dice che i link devono essere 7 +/- 2. Qui sono decisamente fuori.

Naturalmente bravo CERN, bravi cerniotti! 

Pubblicato da Juhan alle 06:36
Etichette: , ,

1 commento:

  1. Marco Bruno4 luglio 2012 alle ore 16:31

    Insomma, alla fine è la conclusione è che per contenere tutta la massa che il bosone di H. conferisce a quelli del CERN è necessario un auditorium moooolto più grande.

    Eppoi... cerniotti? No, CERNIE tout court.

    RispondiElimina

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