New CP-Odd Higgs Boson Results By ATLAS

The paper to read today is one from the ATLAS collaboration at the CERN Large Hadron Collider ...

The Quote Of The Week: Resolving The Mass Hierarchy With A Little Help From A Supernova

"1. Interaction with matter changes the neutrino mixing and effective mass splitting in a way that...

Neutrinos From An Atomic Bomb

Less than three weeks separate us from the XVI Neutrino Telescopes, a very interesting conference...

Future Physicists In Belluno

On Friday I traveled to Belluno, a town just south of the north-eastern Italian alps, to give a...

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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 »

Travel Blog

Travel Blog

Dec 11 2014 | 0 comment(s)

While I do intend to update this blog today or tomorrow with a report on a nice new measurement, my blogging activities have generally slowed down a bit this week, as I am traveling. On Monday I flew from Venice to Paris and then to Miami (in a brand new A380 - that was the first time for me on that giant plane). On the next day I flew to Cancun, and then headed to Playa del Carmen where I am currently staying. 
Great - after posting a blog on alpha_strong and the new CMS measurement of its value yesterday, today I am leaving for the US. My internet connection is going to be shaky during my trip, and right now I am living on the free airport wifi in Paris, waiting to board on my flight. But fortunately, I don't need to worry about answering the comments I receive to that post  - in fact the two main commenters, Vladimir and John, are answering each other well enough that I do not need to intervene...
One of the funniest misnomers in particle physics is the naming of coupling strength parameters of the fundamental interactions as "constants".

We speak of a fine structure constant (alpha) to address one of the most important parameters of electromagnetism; and we call "strong coupling constant" the coupling strength parameter alpha_s of QCD. But these are not constants at all! In fact, they are parameters that show a quite distinct dependence on the energy of subatomic processes.
Diet Is Over

Diet Is Over

Dec 04 2014 | 13 comment(s)

Four months ago I started a diet, as my weight had gone above my comfort zone (77kg, when my optimal weight is of about 70kg). I basically implemented a regime (which has worked in the past) of about 1300 calories a day, cutting mostly on extras (desserts, snacks, alcohol) and bread, and just eating a bit less of everything.
I remember a funny shirt I once saw at a physics conference - it gave 10 tips on what to do when "everything else fails". Here is the list:
10. Subtract Infinity
9. Add heavy fermions
8. Set all fermion masses to zero
7. Invent another symmetry
6. Throw it on the lattice
5. Blame it on the Planck scale
4. Recall the success of the SM
3. Invoke the Anthropic Principle
2. Wave hands a lot, speak with a strong accent
1. Manipulate the data
Yesterday I worked from scratch at a problem which certainly others have already solved in the past. I have mixed feelings with such situations: on one side I hate to reinvent the wheel, especially if there is an easy way to access a good solution; on the other I love to invent new ones...

Anyway this time I have decided I will ask you for some help, as collectively we may have a better idea of the optimal solution to the specific problem I am trying to address. But before I explain the problem, let me give you some background on the general context.

Searches for new physics at the LHC