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location London, United Kingdom
age 30
visits member for 3 years, 9 months
seen Sep 4 at 18:03

Phd student


Jul
20
comment Decay of massless particles
@Bebop: Good point, not sure why I only considered decay to massive particles. I'll edit the answer accordingly.
Jul
20
comment Decay of massless particles
I agree that the word "radioactive" is superfluous in the question's title. For clarity I think a better title would be 'Can massless particles decay?' but of course the choice is yours.
Jul
20
revised Decay of massless particles
Expanded for clarity
Jul
20
answered Decay of massless particles
Jul
19
comment How to determine the mass of a quark?
I hereby promise to upvote a comprehensive, "enormously long answer" alluded to in @Genneth's comment. ;-)
Jul
18
comment How to determine the mass of a quark?
+1 for the links to the pdg.
Jul
18
comment what is the difference between a blackhole and a point particle
Possibly related: physics.stackexchange.com/questions/9529/…
Jul
18
comment Are there books on Regularization and Renormalization in QFT at an Introductory level?
There was a recent blog post about these issues that you might find useful, it's here: motls.blogspot.com/2011/07/…
Jul
17
comment How to determine the mass of a quark?
@David: I think a good answer to the question would cover both of our interpretations. I would attempt to do so but I am sure that, before long, someone else will answer it more clearly than I could.
Jul
17
comment How to determine the mass of a quark?
Given that this sounds like a "how do we measure.." question, I would suggest the 'experimental physics' tag. ;-)
Jul
17
comment Poincare group vs Galilean group
Could you perhaps exchange the equation numbers to the equations themselves please?
Jul
16
comment The Ozma Problem
I tend to just look at the back of my hands with my fingers and thumbs straightened, the left hand makes a nice 'L' shape. Not sure this is going to work for those aliens though ;-)
Jul
16
comment Is there any way to increase a rubber-bands lifetime?
OK, can I have some "prizes" please?! I think you meant 'prices' @Georg, +1 for a good answer all the same ;-)
Jul
16
comment Commutation of operators in quantum theory
'Notation' tag might be apt here
Jul
15
comment what is an inverse femto barn?
It's a shame we don't have an awards system such that I could nominate this answer. (+1 needless to say.)
Jul
15
comment real world applications of Mathematics which use functions with singularities, not just as a matter of mathematical taste but for conceptual reasons
I agree with @Zev C: this should be a community wiki.
Jul
13
awarded  Civic Duty
Jul
12
comment How to predict how much data to collect
I was just getting my head around the details of what you wrote and I have a quick couple of questions, I hope you don't mind. 1/ In the order-of-magnitude estimate are you saying one can take $N_{\rm events}^{-1/2}=f$ and solve for $N_{\rm events}$? I can replicate your "decades" prediction in this way but - where you said "your measurement of a modulation will have an error of order $N_{\rm events}^{-1/2}$" shouldn't it have had a positive power? 2/ What was the motivation for you choice of $\hat B$? I'm afraid I just can't work out where this bit comes from..
Jul
12
accepted How to predict how much data to collect
Jul
12
comment How to predict how much data to collect
thank you so much for taking the time to answer, this is exactly what I was after, with more detail than I had expected. Thanks again.