User Piotr - Physics Stack Exchange

Piotr

Member for 7 years, 1 month
Last seen more than 6 years ago

14 Questions

Score Activity Newest Views

6 votes

2 answers

2k views

'Meson-nucleon' scattering in Scalar Yukawa Theory

asked Mar 23, 2017 at 19:39

5 votes

1 answer

668 views

Differential operators inside commutators

asked Mar 28, 2017 at 20:25

4 votes

1 answer

360 views

Mass-luminosity relation for a fully convective star

asked Apr 24, 2017 at 14:14

4 votes

1 answer

1k views

One loop diagram in $\phi^4$ theory

asked May 12, 2017 at 9:14

4 votes

1 answer

530 views

Origin of the canonical equal time commutation relations

asked May 26, 2017 at 18:36

3 votes

2 answers

6k views

Definition of conjugate momentum in QFT

asked May 28, 2017 at 13:35

3 votes

1 answer

561 views

Mode expansion of the field operator in non-relativistic QFT

asked Jun 3, 2017 at 16:36

3 votes

2 answers

3k views

Why is $\gamma^5$ used to define the projection operator?

asked Jun 3, 2017 at 22:44

3 votes

0 answers

654 views

Plane wave solutions to massless Dirac equation

asked Apr 19, 2017 at 20:48

2 votes

1 answer

1k views

Combinatoric factor in $\phi^4$-theory scattering

asked Apr 20, 2017 at 21:53

2 votes

1 answer

5k views

Focal length of a pair of lenses

asked Jun 11, 2017 at 14:32

1 vote

0 answers

67 views

EM Lagrangian in terms of gauge fields [duplicate]

asked Mar 14, 2017 at 23:44

1 vote

0 answers

318 views

Lorentz invariance of the axial current

asked May 25, 2017 at 14:41

0 votes

1 answer

498 views

Invariance of the scattering amplitude under photon polarization shift

asked May 25, 2017 at 17:09