New results from the LHC at Toronto.

It’s less than a month since we saw results from the Large Hadron Collider presented at the ICHEP conference and we marvelled that they were able to show the analysis from 350/nb of luminosity collected just a few days before the conference opened. But ICHEP is not the only conference worth watching and now they have about 2200/nb (2.2/pb) of data with much of it collected in the last week.

At the Hadron Collider Physics Symposium in Toronto this week more new results are being shown. Some of it using over 1/pb of data or about three times what was seen at ICHEP. Sadly there are no videos of the talks but the slides are being put online and I hope that some of the more expert particle physics bloggers will soon be able to tell us some details of what has been presented.

From a talk today by Corrine Mills on W and Z physics at ATLAS we have this nice update to the beautiful plot of muon pairs showing some classic resonances very clearly. This is using 0.9/pb of data. I can’t help thinking they have cut the x-axis off a bit shorter than necessary. What lies just above the 100 GeV energy range shown I wonder?

More plots using over 1/pb appear at the end of the slides. I don’t think there is any new physics here but it’s just nice to know that some results from the first 1/pb have come out so quickly. It is only 16 days since they passed that milestone. ATLAS have really thrown the gauntlet down for CMS who only showed plots using 200/nb in their talk on the same topic.

Tomorrow they will present top physics and Higgs searches with Beyond Standard Model stuff and heavy ion physics the day after. On Friday they conclude by looking to the future, including the possibility of LHC upgrades and the case for keeping the Tevatron running. Startling announcements are not expected but it’s worth watching just in case.


5 Responses to New results from the LHC at Toronto.

  1. Luboš Motl says:

    Are you gonna watch it for us?

    There are small peaks in the muon graph around 103 GeV or so – which I don’t quite think to be real. You see on the y-axis that the number of muon pairs becomes of order one when you go above 100 GeV which means that it would be pretty useless to try to go well above 100 GeV now.

    Best wishes
    Lubos

  2. Philip Gibbs says:

    You are probably right. Tommaso showed a similar plot from CMS using 280/nb at http://www.science20.com/quantum_diaries_survivor/plot_week_lovely_dimuon_mass_spectrum

    There is very little above 100 GeV so there wont be much more yet. Funny that they cut off whatever they did have though.

    I’ll check the talks but I am sure if there is any new physics to see you will get a much better report from Tommaso or Jester.

  3. [...] blogs de física se han hecho eco de estos resultados, que yo sepa, salvo Philip Gibbs, “New results from the LHC at Toronto,” ViXra log, August 24, 2010, que se limitó a presentar algunas figuras seleccionadas de [...]

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