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seen Oct 6 at 12:28

Learning from scratch


Oct
24
accepted Relation between unitarity and conservation of probability
Oct
18
revised Relation between unitarity and conservation of probability
added 291 characters in body
Oct
18
asked Relation between unitarity and conservation of probability
Oct
13
awarded  Nice Question
Oct
10
accepted How are the HEP experiments' invariant mass plots generated?
Sep
2
accepted Different values of same physical quantity in time domain and space domain OR Physical explanation of Cauchy Schwarz result
Aug
22
answered Lev Landau's “Theoretical Minimum”
Aug
22
comment Different values of same physical quantity in time domain and space domain OR Physical explanation of Cauchy Schwarz result
@David they are averaged over the same two events (classically), and represent the same physical quantity. Why are the values different, and in general, why is it an ineuqlaity?
Aug
22
revised Different values of same physical quantity in time domain and space domain OR Physical explanation of Cauchy Schwarz result
added 172 characters in body; edited title
Aug
22
accepted Help understanding this forced undamped oscillator
Aug
22
asked Different values of same physical quantity in time domain and space domain OR Physical explanation of Cauchy Schwarz result
Aug
22
answered Misused physics analogies
Aug
20
asked Help understanding this forced undamped oscillator
Aug
18
comment Embrace Physics
I upvoted because I would have liked to listen to such a talk when I was an undergrad.
Aug
12
accepted Fitting to a high density scatter plot
Aug
12
comment How are the HEP experiments' invariant mass plots generated?
this is what I suspected, and tried to do my own PID. But I got stuck.
Aug
11
comment Fitting to a high density scatter plot
Another reason the form of the plot looks different from the released ones is that in ALICE Pb-Pb collisions, the multiplicity of pions is so much higher, that it populates the scatter plot obscuring the curves of the electron and the muon.
Aug
11
comment Fitting to a high density scatter plot
@dmckee I have replaced it by a plot of the actual data, so no MC. I used the version of Bethe Bloch provided for the AOD macros. I also used the default TH1::Fit
Aug
11
revised Fitting to a high density scatter plot
added 91 characters in body
Aug
11
comment Fitting to a high density scatter plot
@david and dmckee I had posted a plot from pp collision (which was the same, except much lower multiplicity). I have explained the removal in an email to team+physics email.. Basically, the behaviour at low momentum is the same except that the multiplicity is much much higher. I could not find free-to-distribute plots for heavy ion collisions, maybe some from STAR experiments exist, if anyone knows of any, I can post them as a comparision.