Geneva Physics Program Hard Muons
Hi Edgar,
I was working on trying to figure out which muons are the hardest muons. Are the hardest muons the ones with the most energy? I scanned “mu_e”, but I can’t tell which muons have the highest energy because it seems scattered throughout the events.. I’m not sure if what I said makes sense.. I also thought that if I drew “mu_e” it would help me figure out which muons had the highest energy, but it plots the number of muons that had a particular energy, not which muon had what energy..right?
I’m aware that there is a GetMaximum function in TTree, but it won’t tell us which event produced the maximum energy..so will that help us?
Thank you,
Ashley
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
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?
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
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