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More On The Alleged WW Excess From The LHC

This is just a short update on the saga of the anomalous excess of W-boson-pair production that...

A Useful Approximation For The Tail Of A Gaussian

This is just a short post to report about a useful paper I found by preparing for a talk I will...

True And False Discoveries: How To Tell Them Apart

Many new particles and other new physics signals claimed in the last twenty years were later proven...

The SUSY-Inspiring LHC WW Excess May Be Due To Theoretical Errors

A timely article discussing the hot topic of the production rate of pairs of vector bosons in proton...

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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 »

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"In the case where the dark matter particle is light (less than 1 GeV) and the interactions is either contact or mediated by light (but not massless) particles, there is parameter phase space that cannot be probed by current underground detectors even with substantially lowered energy thresholds. This region of the parameter space can be probed by shallow site detectors with low energy thresholds. However, since in this case dark matter particles will be very effectively stopped if coming upwards (i.e. below the detector), we argue that a search for a daily modulated dark matter signal is probably the best strategy for probing this part of the parameter space."
This must be the boosted b-jets season... Just a few days ago I discussed here the nice new observation of boosted Z->bb decays pulled off by the ATLAS collaboration using 8-TeV proton-proton collisions recorded in 2012. And today I am pleased to see in the Arxiv a new study by D. Ferreira de Lima, A. Papaefstathiou, and M. Spannowsky on the possibility to measure the pair production of Higgs bosons in their decay to two pairs of b-quark jets.
I was delighted today, as I checked the page of public ATLAS results, to find a very beautiful new result. The signal ATLAS found and just published on the arxiv is not one anybody could doubt to be there: no surprise whatsoever. And yet, it is a difficult one to extract, and one on which I myself have spent several years of my research work on the CDF experiment.
The 35th international chess tournament in Mogliano Veneto this year did not feature strong grandmasters or international masters, but a pack of 24 local players of average strength around 2150. Still, it was a very hard-fought competition, with almost no game ending as a draw before all winning attempts had been tried.

I scored a rather disappointing 2 points out of 5, losing two games -one of them undeservedly, for a performance rating is 2030, a bit less than what I believe is my current playing strength. Below I report my only win, against Enrico Danieli, an elo 2070 player.

Danieli-Dorigo, Mogliano 2014
1.d4 d5 2.Nc3 Bf5 3.e4?!
A meteor caught on film during its non-luminous free fall at terminal velocity ? Or an elaborate hoax ? Or something else ? I must admit that when I saw the video posted in the internet a few weeks ago I was intrigued, and operated a willful suppression of disbelief. The footage showed a free-falling black stone that really looked like a meteoroid, passing by the owner of the camera hanging on a parachute, on the skies of Norway. I wanted to believe!


Above: sum of frames from the video shot by the parachuters
Long-time readers of this blog (are there any left ?) know me well since I often used to  write posts about personal matters here and in my previous sites. However, I am aware that readers come and go, and I also realize that lately I have not disclosed much of my personal life here; things like where I work, what's my family like, what I do in my pastime, what are my dreams and my projects for the future. So it is a good idea to write some personal details here.