Reputation
1,785
Next privilege 2,000 Rep.
Edit questions and answers
Badges
11 27
Impact
~65k people reached

1d
comment Weak isospin transformation of $\bar\psi \psi \phi$
Thank you for your answer! I do not get the second last sentence of the first paragraph: “But it is not $\mathrm U_Y(1)$ invariant, making the summary charge as minus double charge of $R$.” Could you perhaps reword it a bit?
1d
answered Where does gravitational waves' energy go?
1d
revised Do we know why there is a speed limit in our universe?
Remove italics from body text
1d
suggested approved edit on Do we know why there is a speed limit in our universe?
1d
answered Are ergs commonly used in astrophysics? If so, is there a specific reason for it?
1d
asked Weak isospin transformation of $\bar\psi \psi \phi$
Feb
9
awarded  Notable Question
Feb
4
comment Why is a rainbow curved in shape?
Oh, sorry. I remembered 42 degrees but perhaps that number just seemed legitimate from the Hitchhiker's Guide? The wikipedia article says 42 all over the place and has “The light leaving the rainbow is spread over a wide angle, with a maximum intensity at the angles 40.89–42°” in one image caption. So 42 does not seem too wrong?
Feb
2
comment Angular velocity when a rod inclined to a wall slips and its subsequent motion observed from the axis of rotation
In the center of mass frame you would only see the rotation. This frame is attached to the red dot. You would just see the rod being rotated by $\alpha$. Or are you interested in the exact time evolution of this motion?
Feb
1
answered Angular velocity when a rod inclined to a wall slips and its subsequent motion observed from the axis of rotation
Feb
1
revised Tension in the string
Include image directly
Feb
1
comment Why does this model fall apart when angular velocity is small?
This seems very similar to my older question here: physics.stackexchange.com/questions/17513/…
Feb
1
answered Tension in the string
Feb
1
suggested approved edit on Tension in the string
Jan
28
comment Why do three-scalar correlation functions vanish by parity?
Oh, I had a lot of $\psi$ where I actually meant $\phi$. Now it should be fixed. We were told that it vanishes but we the argument turned out to be not quite sound, so we are looking for another argument.
Jan
28
revised Why do three-scalar correlation functions vanish by parity?
Fix phi and psi
Jan
28
asked Why do three-scalar correlation functions vanish by parity?
Jan
17
revised Linear term in six dimensional $\phi^3$-theory
edited tags
Jan
17
asked Linear term in six dimensional $\phi^3$-theory
Jan
17
revised Effect of linear terms on a QFT
I assume that is was meant as a Klein-Gordon kinetic term instead of this strange interaction. With the edit it maches Peskin & Schröder (1995) Equation (11.5).