Highest Energy Collisions ? Not In My Book

Yesterday I posed a question - Are the first collisions recorded by the LHC running at 13 TeV the...

Bang !! 13 TeV - The Highest Energy Ever Achieved By Mankind ?!

The LHC has finally started to produce 13-TeV proton-proton collisions! The picture below shows...

EU Grants Submitted And Won: Some Statistics

The European Union has released some data on the latest call for applications for ITN grants. These...

The Challenges Of Scientific Publishing: A Conference By Elsevier

I spent the last weekend in Berlin, attending a conference for editors organized by Elsevier. And...

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Tommaso DorigoRSS Feed of this column.

I am an experimental particle physicist working with the CMS experiment at CERN. In my spare time I play chess, abuse the piano, and aim my dobson telescope at faint galaxies.... Read More »

ATLAS sent today to the Cornell arxiv and to the journal JHEP their latest measurement of the top-antitop production asymmetry, and having five free minutes this afternoon I gave a look at the paper, as the measurement is of some interest. The analysis is done generally quite well, but I found out there is one things I do not particularly like in it... It does not affect the result in this case, but the used procedure is error-prone. 

But let's go in order. First I owe you a quick-and-dirty explanation of what is the top asymmetry and why you might care about it.


Jan 30 2015 | 6 comment(s)

This blog - which, in different sites, has been online since 2005, hence for over 10 years now - enjoys a core of faithful readers, who over the years have learnt more detail on my personal life than they probably thought they'd need. But it also occasionally attracts larger crowds of web navigants with an interest in particle physics. They have all rights to not know who I am and whether I am a 20yo geek or a retired professor, male or female, etcetera. 
The publishing giant Elsevier is about to launch a new journal, Reviews in Physics. This will be a fully open-access, peer-reviewed journal which aims at providing short reviews (15 pages maximum) on physics topics at the forefront of research. The web page of the journal is here, and a screenshot is shown below.

The CMS collaboration has released yesterday results of a search for Majorana neutrinos in dimuon data collected by the CMS detector in 8 TeV proton-proton collisions delivered by the LHC in 2012. If you are short of time and just need an executive summary, here it is: no such thing is seen, unfortunately, and limits are set on the production rate of heavy neutrinos N as a function of their mass. If you have five spare minutes, however, you might be interested in some more detail of the search and its results.
A periodic backup of my mobile phone yesterday - mainly pictures and videos - was the occasion to give a look back at things I did and places I visited in 2014, for business and leisure. I thought it would be fun to share some of those pictures with you, with sparse comments. I know, Facebook does this for you automatically, but what does Facebook know of what is meaningful and what isn't ? So here we go.
The first pic was taken at Beaubourg, in Paris - it is a sculpture I absolutely love: "The king plays with the queen" by Max Ernst.

Still in Paris (for a vacation at the beginning of January), the grandiose interior of the Opera de Paris...
This morning I woke up at 6AM, had a shower and breakfast, dressed up, and rushed out in the cold of the fading night to catch a train to Mestre, where my car was parked. From there I drove due north for two hours, to a place in the mountains called Pieve di Cadore. A comfortable ride in normal weather, but this morning the weather was horrible, with an insisting water bombing from above which slowly turned to heavy sleet as I gained altitude. The drive was very unnerving as my car is old and not well equipped for these winter conditions - hydroplaning was frequent. But I made it.