Archive for the 'Physics Today' Category

∅νββ decay: seen or not seen?

Thursday, December 6th, 2007

There are mainly two ways to take into account non-zero neutrino masses…

Let’s modify the fields of the Standard Model (SM) by adding the right-handed neutrino. The main consequence is that in the SM lagrangian a mixing term for neutrino flavour pops up, parametrized by a matrix called the Pontecorvo-Maki-Nakagawa-Sakata matrix.
Let’s remove the renormalizability requirement […]

The Same Old Song for the Same Old Fart

Saturday, January 13th, 2007

Happy birthday to meee,
happy birthday to meeee,
happy birthday dear Pietrooo,
happy birthday to meeeeeee!
I gave myself as a present another 30/30 in an exam… So good!

Quote of Today and a thanksgiving

Monday, January 8th, 2007

You should emulate your heros, but don’t carry it too far, especially if they are dead
And thanks to the 1402 unique visitors of this week…

Vacuum

Sunday, November 12th, 2006

Higgs… Noether… Symmetries… SU(3)… Flavour… Color… Crap… Neutrinos… Neutralinos… Standard Model And Beyond…
Why Pisa and Roma universities have a quality of teaching surely NOT better than Padova University, but have plenty of money to send their undergraduates some months in America during the thesis?
Why Pisa and Roma universities consider the Summer Student as an exam […]

Night…

Friday, October 6th, 2006

Oh well… I should give to Tommaso my report on the summer activity tomorrow (actually, in a few hours). But I want to obtain some better results, ’cause I don’t like to leave a work half-finished. So I am still working… Ok it is 4.30 in the morning… Oh well… I seriously doubt I will […]

Summer Student 17 / Now sleep comes

Friday, September 15th, 2006

66 hours, 39 minutes total.
3 hours of which were dedicated to sleep.
About the 4.5%…
But I found and fixed the source of overcorrections in the neural networks I am working on…
More on the topic this weekend, if we do not go to Niagara Falls.
Now I will sleep…

Summer Student 10 / Sex and the City

Tuesday, August 29th, 2006

*** Break *** segmentation violation
Generating stack trace…

Summer Student 8 / RF cavities at FNAL

Friday, August 25th, 2006

A RF cavity is a particular cavity in which a variable electromagnetic field accelerates the particles that enter in it. The smartness is that a RF cavity is in fact made up from a certain number of cavities, in series one after the other: you know that an electric field accelerate a particle only if […]

Interactions 2 / Kinematics: Lorentz still rules

Thursday, June 29th, 2006

Well, here we are…
If we take into account two reference frames in motion one in respect to the other (but with no acceleration), we can take as a good equation the Lorentz Equations.
These equations basically (with no mathematical strictness… It is nearly midnight…) say that the coordinate quadri-vector (the vector that identifies a point in […]

Interactions 1 / Kinematics: relativistic energies

Saturday, June 24th, 2006

I promised to speak about this topic in this post, so here I inaugurate the Physics Today section…
I will perhaps elaborate more precisely on relativistic kinematics in a future page of the website: today we will review some useful concepts for particle physics.
Many of you have surely heard about the famous E = mc2 formula, […]