Preparing a talk August 6, 2006
Posted by dorigo in news, personal, physics, science, travel.2 comments
I am due to present the latest results on Standard Model physics (electroweak, heavy flavor production, Higgs searches and the like) at the QCHS06 conference that will be held in the Azores islands on the first week of September.
So I thought that today would be a good day to start collecting the material - “blessed” (i.e. approved) results from CDF and D0 on the physics topics I will discuss in my talk.
As I started to browse through the public pages of the experiments, to look for interesting stuff to show, I was strangely taken by some sort of nausea. I did not quite understand why for a second, but then, stepping back, I understood what is the problem.
Tens, hundreds of distributions. Momenta, angular distributions. Masses. And none of them speaks against the Standard Model. None of them has anything to say that can draw some hope that the Standard Model is not the end of it all.
At the end of Run I, we had so many interesting things to look forward to examine in more detail. We had the e-e-gamma-gamma-Missing Et event, which cried for an explanation but had none in the SM (it turns out one electron is marginally identified as such, but still the event is quite strange - but one event is nothing much!). We had “superjets”. We had other discrepancies. There were too many high-Pt leptons in the dilepton top events, the top quark mass came out higher as you added jets. The W mass with electrons was not coming out right if you set the electron energy scale with the E/p method (something was never really understood). We seemed to have too many W-gamma events.
Not that any single one of the above “warning signs” was really exciting. But there was a good mix of them.
Now, with 10 times more statistics, we can’t even show a 2-sigma discrepancy here and there. Have we become better at analyzing the data, or better at hushing up any discrepancy ? Or is it just that the SM is too good and it cannot be broken ?
I feel a bit depressed. What should I report about in my talk, to physicists who are not too familiar with the latest developments in HEP (mostly a conference for theorists and QGP physicists) ? I could do it in a line: the SM is alive and well. Read about it in the original papers, or in some good review article. Thank you.
Darn. I will have to console myself with exploring the islands.