Last week-end Padova researchers tested the first calorimeter and tracker prototypes of the iMPACT...


It is nice when somebody publishes an article and acknowledges your contribution, even when the...

Revenge Of The Slimeballs: When US Labs Competed For Leadership In HEP

The clip below, together with the following few which will be published every few days in the coming...

Muon G-2: The Anomaly That Could Change Physics, And A New Exciting Theoretical Development

Do you remember the infamous "g-2" measurement ? The anomalous magnetic moment of the muon has...

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Tommaso DorigoRSS Feed of this column.

Tommaso Dorigo is an experimental particle physicist, who works for the INFN at the University of Padova, and collaborates with the CMS experiment at the CERN LHC. He coordinates the European network... Read More »

"I envy University Professors. They are paid to question people who know nothing but try very hard to say something, while I have to question people who know everything but do their utmost to say nothing at all."
Piercamillo Davigo, Italian Judge investigating corrupt politicians
I am quite happy today to announce here that there is a new blog to visit, and to bookmark!, for those among you who are interested to know what does a PhD in physics do after he or she graduates. In particular, as is explained in the subtitle, the question that the blog addresses are:

What are the sectors of employment for a physics graduate? How do you get a job in keeping with your studies/interests?
I feel quite grateful to the DZERO collaboration for publishing today in the Cornell arxiv the preprint of their search for neutral MSSM Higgs bosons in the tau-pair decay mode. Not more than 12 hours ago in fact I had been looking for a suitable figure which could summarize the status of searches for those particles, to help a student who is about to graduate; but had not found anything satisfactory.
How could I miss it - and you did too. A very comprehensive article on standardization as a way to reduce environmental pollution has appeared here, and has almost gone unnoticed. I think it is worth reading, if only to acknowledge the existence of this issue and the need for all of us to pay attention to it.

Here is an excerpt of Enrico's conclusions from the study:
A paper describing the first evidence of top pair production in association with a energetic photon has just appeared on the Cornell Arxiv. This search has been performed by the CDF collaboration in a sample of 6 inverse femtobarns of proton-antiproton collisions.

There is nothing strange or particular about the fact that any hard production process at a hadron collider can produce, in addition with a massive state such as a top pair, additional energetic photons. That is because any charged particle involved in the process will have a small but finite chance of radiating electromagnetic energy, with a strength governed by our good-old fine-structure constant.
The ATLAS Collaboration, one of the two high-energy physics experiments at the CERN Large Hadron Collider, has just produced updated results of their ongoing search for new heavy particles decaying into lepton pairs. They are now using up to 236 inverse picobarns of 7 TeV collisions, which is seven times more data than previous searches based on 2010 datasets. A seven-fold increase in data size grants a significant increase in sensitivity, so it is worth taking a look at what they see.