Comments on: Hard Muons http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/ Just another Boston University Physics weblog Mon, 19 Apr 2010 07:15:50 +0000 hourly 1 http://wordpress.org/?v=3.5 By: ashley http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/comment-page-1/#comment-80 ashley Sun, 28 Feb 2010 19:15:46 +0000 http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/#comment-80 Hi Edgar,

I think I’m making progress on this. It’s just taking me a long time and I had to put it off to study for our physics classes, but I’ve started working on it again. I’ll let you know if I have problems.

Thank you,
Ashley

]]> By: edgar http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/comment-page-1/#comment-78 edgar Fri, 26 Feb 2010 17:00:53 +0000 http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/#comment-78 Hi Ashley,
It looks like I missed your latest comment. Sorry. Did you make any progress on this? Did you take a look at:
http://physics.bu.edu/sites/geneva-program/2010/02/21/about-the-variables-in-muons-root/comment-page-1/#comment-65

]]> By: ashley http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/comment-page-1/#comment-63 ashley Sat, 20 Feb 2010 21:58:04 +0000 http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/#comment-63 when i scan mu_pt, I see that the first two in the array do not have the highest pt.. am i reading it wrong?

]]> By: edgar http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/comment-page-1/#comment-62 edgar Sat, 20 Feb 2010 21:45:22 +0000 http://physics.bu.edu/sites/geneva-program/2010/02/20/hard-muons/#comment-62 Hi,
People talk about the hardest muons (or particles in general) when they have high transverse momentum (pt). If you scan mu_pt, for example, you will see that the “hardest” muon, i.e. the one with the highest pt is first in the list (array).
Now, when you plot just “mu_e” it should plot the energy of every muon in each event not just the ones that have certain energy, unless you impose a contraint as we saw during the exercise.
As far as the GetMaximum fucntion, it seems that it gets you the maximum value stored in a leaf, i.e, for “mu_e” you will get the energy of the most energetic muon. But you don’t need to do this, as I just said, the leafs are ordered in pt, so the hardest muons come on top.
Hope it helps.
-e

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