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Learning from scratch


Aug
11
revised How are the HEP experiments' invariant mass plots generated?
deleted 73 characters in body
Aug
11
asked How are the HEP experiments' invariant mass plots generated?
Jul
24
comment $N$-body simulation in General Relativity
Have a look at the universe sandbox. Everything is classical gravity though.
Jul
23
accepted What is meant by “combinatorial background” in experimental high energy physics
Jul
21
revised What is meant by “combinatorial background” in experimental high energy physics
added 41 characters in body
Jul
21
asked What is meant by “combinatorial background” in experimental high energy physics
Jul
15
asked A moderate introduction to Hanbury Brown Twiss interferometry in particle physics
Jul
15
comment Why is pseudorapidity defined as $-\log \tan \theta/2$
Thanks a lot, David. This is a great answer. I had been looking for an involved experimental perspective as well and this is better than most stuff I read.
Jul
15
accepted Why is pseudorapidity defined as $-\log \tan \theta/2$
Jul
14
revised Why is pseudorapidity defined as $-\log \tan \theta/2$
added 376 characters in body
Jul
14
asked Why is pseudorapidity defined as $-\log \tan \theta/2$
Jun
30
comment Does a static electric field and the conservation of momentum give rise to a relationship between $E$, $t$, and some path $s$?
It might interest you to look at the following question and the answers provided therein.
Jun
21
accepted Length of a curve in D dimensional euclidean space
Jun
21
comment Length of a curve in D dimensional euclidean space
@Fabian could you post that as an answer?
Jun
20
comment Length of a curve in D dimensional euclidean space
No it is not. A metric is defined for the locally flat space. For a one dimensional smooth curve we get the line element. Assuming a single parameter can define the curve, my question is to get the length from this parametrization. By "show that it works" I meant that you plugged and chugged for a circular segment on $D=2$ and verified it with familiar knowledge that a quadrant is a fourth of the perimeter.
Jun
20
revised Length of a curve in D dimensional euclidean space
edited body
Jun
20
comment Length of a curve in D dimensional euclidean space
@MBN for small typos, etc.. this server allows anyone to edit posts :)
Jun
20
comment Length of a curve in D dimensional euclidean space
That is true, but I have derived one gravely incorrect result in the past treating derivatives as fractions. I will think about this, thanks for answering.
Jun
20
comment Length of a curve in D dimensional euclidean space
@Fabian so is it a general statement that the D coordinates can be paramterized by single valued function $f:\mathbb{R}^D\rightarrow \mathbb{R}$ is this paramterization unique?
Jun
20
comment Length of a curve in D dimensional euclidean space
The 2D parametrization of a circular curve was the first thing I thought too. But this just shows that it works. Not much more