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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 a number of exxperiments in physics and astrophysics, including the... Read More »

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Since I have started to write on this site, 13 months ago, I have realized that few of the contributors here discuss their private life and thoughts. But I was used to do it in my old site and so I still do it, because I conceive a blog as an online diary, and there are things I wish to write here just for the record, as a private memo, or to let you know what is in my mind, in case you wondered. Recently some anonymous troll complained in the comments thread that what I had written was irrelevant and self-contemplating -and I agreed, but asked him (her?) to please walk away rather than bothering me with similar lamentations.
I read with pleasure today a proceedings writeup of the Moriond 2010 talk given by S. Andringa on behalf of the Pierre Auger Observatory. It is too bad that I did not visit La Thuile this year: the venue of the Moriond conferences is always a very pleasant place to spend a week, with talks scheduled in the morning and evening which leave the central hours of the day free for skiing. My last trip there was in 2005: I need to make the case for another visit next year!
"Leptons interact only with photons, and with the intermediate bosons that presumably mediate weak interactions. What could be more natural than to unite these spin-one bosons into a multiplet of gauge fields ? Standing in the way of this synthesis are the obvious differences in the masses of the photon and the intermediate (boson), and in their couplings. We might hope to understand these differences by imagining that the symmetries relating the weak and electromagnetic interactions are exact symmetries of the Lagrangian but are broken by the vacuum".

Steven Weinberg
Finally, the Bose-Einstein Correlations article by CMS to which I have personally contributed during the last few months is now an arxiv entry, and has been sent to Physical Review Letters. This is a success for the CMS collaboration, since we are the first to measure this effect in the new LHC proton-proton collisions, at 0.9 and 2.36 TeV of center-of-mass energy.
If you follow the blogosphere as a source of information on cutting-edge high-energy-physics results, you certainly by now know that the DZERO collaboration has produced a new exciting result. They find a 3.2 standard deviation effect in a study of charge asymmetry of muon pairs, which can be due to a unexpected, large source of CP violation -one which constitutes a very good shot at explaining the origin of the matter-antimatter asymmetry of the Universe!
While around the world particle physicists are working frantically to produce important new results to be shown at ICHEP 2010 -the International Conference on High-Energy Physics, which is held every two years and is arguably the single most important meeting for this branch of science-, new discoveries get claimed in an asynchronous way. And some of them in a very asynchronous way, I should say, since they are based on 40-years-old data.