An appetizer: Rare B Decay Asymmetries
    By Tommaso Dorigo | January 12th 2010 03:37 PM | 1 comment | Print | E-mail | Track Comments
    About Tommaso

    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...

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    As if taken by a spell, my joking claim to be on strike in the last post grew to become one of the longest streaks of absence from blogging of the last few months, for a series of irrelevant reasons tightly packed together.

    In the meantime I have tried to put together an article on a recent very interesting measurement performed by the CDF collaboration: a study of very rare decays of B mesons, which can now not only determine the rate of said decays, but also have a taste at subtle kinematical effects in the distribution of the final states. The distributions are a new key to discriminate the existence of new physics in these rare processes.

    Unfortunately, the piece is not ready yet, but I had decided I would post something today nonetheless, so I will give here an anticipation of tomorrow's post: the graph describing one of the main results of the CDF analysis. It is shown below.

    In the graph you see... Well, what you see will only be clear to you tomorrow - or, if you are a physicist, you might enjoy getting the details yourself in the public web page of the CDF analysis!


    I see a solid red line which fits within the uncertainty for all but two data points.  I see a dashed blue line which falls within the uncertainty for the same number of points.  However the solid blue line is closer to the margin of error in the points which it missed.   
    On the website you link to the dashed line is refered to at one point as signal and the red line as background (noise?).  hmm.  Can I get a clue on what C7 is?
    Science advances as much by mistakes as by plans.