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Physics_maths
  • Member for 10 years, 7 months
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81 votes
6 answers
7k views

What was the major discovery on gravitational waves made March 17th, 2014, in the BICEP2 experiment?

35 votes
2 answers
5k views

What does it mean that there is no mathematical proof for confinement?

20 votes
3 answers
2k views

Do accelerated charges radiate or not? [duplicate]

16 votes
4 answers
4k views

Is forward scattering = no scattering?

14 votes
1 answer
1k views

Mathematical motivation of OPE?

11 votes
2 answers
989 views

The integral is zero! $\int \frac{\mathrm{d}^d k}{(2\pi)^d} = 0$

10 votes
2 answers
4k views

How to find a particular representation for the gamma matrices?

9 votes
2 answers
4k views

Why does a Lorentz scalar field transform as $U^{-1}(\Lambda)\phi(x)U(\Lambda) = \phi(\Lambda^{-1}x)$?

9 votes
2 answers
1k views

Are there any exact solutions in the Standard Model of particle physics?

9 votes
3 answers
940 views

Are there any serious alternatives to QCD nowadays?

9 votes
3 answers
3k views

Multivariable Dirac Delta and Faddeev-Popov Determinant

9 votes
1 answer
2k views

QED Vertex Factor/Rule

8 votes
1 answer
446 views

Charge of the muon

8 votes
1 answer
620 views

How do you build a Lagrangian in particle/nuclear physics? (A specific example)

7 votes
1 answer
289 views

Are composite bosons always bosonic (e.g. the pion-cloud surrounding the nuclei)?

7 votes
4 answers
3k views

How do you find a particular representation for Grassmann numbers?

7 votes
3 answers
1k views

Time-ordered operator in Srednicki

7 votes
2 answers
1k views

Feynman propagator with general $\xi$ parameter

7 votes
1 answer
3k views

Switching from sum to integral

6 votes
1 answer
397 views

Why is the effective action $\Gamma[\phi_c] \propto -(VT)$ (spacetime volume)?

6 votes
1 answer
1k views

What is Photoproduction

6 votes
2 answers
3k views

Derive Schwinger-Dyson equations in Srednicki

6 votes
1 answer
476 views

Does $\langle\Omega|\mathrm{e}^{\mathrm{i}Px}=\langle\Omega|\mathrm{e}^{\mathrm{i}0x}$? $(\langle\Omega| =$ ground state of the interacting theory)

6 votes
3 answers
423 views

Are there any Meson colliders?

5 votes
1 answer
5k views

Neutrinos arrived before the photons (supernova)

5 votes
2 answers
890 views

What is the motivation behind $\tau=\mu \frac{\mathrm{d}u}{\mathrm{d}y}$ for Newtonian fluid?

5 votes
2 answers
4k views

Spacelike and timelike photons

5 votes
3 answers
245 views

Faster than light galaxies/clusters?

5 votes
2 answers
307 views

Why is $U(\Lambda)^{-1} = U(\Lambda^{-1})$ for a unitary representation?

5 votes
2 answers
287 views

What does library number 539 mean in physics books? [closed]