User Hunter

38 votes

2 answers

5k views

Large and small gauge transformations?

research-level gauge-theory

asked Jul 31, 2013 at 12:44

24 votes

2 answers

5k views

In what sense is the renormalization group equation a group?

asked Mar 6, 2014 at 19:08

21 votes

4 answers

4k views

$\mathrm{SU(3)}$ decomposition of $\mathbf{3} \otimes \mathbf{\bar{3}} = \mathbf{8} \oplus \mathbf{1}$?

mathematical-physics group-theory group-representations lie-algebra representation-theory

asked Dec 6, 2013 at 1:41

17 votes

1 answer

4k views

Green's function in path integral approach (QFT)

quantum-field-theory scattering path-integral s-matrix-theory greens-functions

asked Feb 9, 2014 at 0:58

14 votes

1 answer

2k views

Are "confinement" and "asymptotic freedom" two sides of the same coin?

quantum-field-theory renormalization quantum-chromodynamics yang-mills confinement

asked Mar 7, 2014 at 18:35

12 votes

0 answers

1k views

How do we know for sure a theory is non-renormalizable?

quantum-field-theory renormalization

asked Feb 24, 2014 at 8:56

12 votes

2 answers

1k views

Could spontaneous symmetry breaking happen again in our universe?

particle-physics cosmology phase-transition symmetry-breaking

asked Aug 15, 2013 at 2:47

11 votes

2 answers

5k views

Lorentz transformation of the Spinor Field

quantum-field-theory special-relativity dirac-equation spinors

asked Oct 29, 2013 at 17:24

8 votes

3 answers

2k views

Hodge star operator on curvature?

differential-geometry tensor-calculus gauge-theory curvature yang-mills

asked Jul 26, 2013 at 15:28

8 votes

1 answer

2k views

Unitary Lorentz transformation on quantized Dirac spinor

quantum-field-theory special-relativity dirac-equation spinors poincare-symmetry

asked Nov 23, 2013 at 0:57

8 votes

2 answers

2k views

QFT Dyson series: why are we solving the Schrodinger equation?

quantum-field-theory schroedinger-equation terminology time-evolution

asked Dec 10, 2013 at 16:03

7 votes

1 answer

1k views

Question about the Noether charge algebra

quantum-field-theory group-theory noethers-theorem lie-algebra classical-field-theory

asked Mar 20, 2014 at 14:05

7 votes

2 answers

613 views

What is the exact relation between $\mathrm{SU(3)}$ flavour symmetry and the Gell-Mann–Nishijima relation

standard-model conservation-laws group-representations lie-algebra isospin-symmetry

asked Mar 16, 2014 at 12:44

6 votes

0 answers

553 views

How does the renormalization scale $\mu$ cancel in all finite observables?

quantum-field-theory renormalization regularization dimensional-regularization

asked Mar 1, 2014 at 15:55

6 votes

2 answers

1k views

How many physical degrees of freedom does the $\mathrm{SU(N)}$ Yang-Mills theory have?

gauge-theory yang-mills degrees-of-freedom

asked Mar 11, 2014 at 3:59

6 votes

1 answer

304 views

Background Gauge Condition In Moduli Space

research-level gauge-theory magnetic-monopoles moduli

asked Jun 23, 2013 at 9:05

6 votes

1 answer

490 views

Proof that we can always find a gauge transformation such that $A_0=0$?

research-level gauge-theory field-theory yang-mills gauge

asked Jul 19, 2013 at 18:24

5 votes

1 answer

510 views

Question about the Killing form in Georgi

group-theory group-representations lie-algebra representation-theory

asked Oct 23, 2013 at 0:21

5 votes

1 answer

329 views

How do we measure the physical field of a particle?

quantum-field-theory renormalization

asked Feb 25, 2014 at 14:28

5 votes

2 answers

297 views

Evaluate $1$-loop contribution to the $4$-point Green's function

quantum-field-theory mathematical-physics renormalization integration

asked Feb 12, 2014 at 12:08

5 votes

1 answer

722 views

Help in deriving the Adler-Bell-Jackiw anomaly

quantum-field-theory quantum-anomalies

asked Mar 21, 2014 at 23:49

5 votes

3 answers

272 views

Is there a table that sums up the parameters, the assumptions/symmetries, and the predictions of the standard model?

particle-physics resource-recommendations standard-model

asked May 21, 2014 at 16:57

5 votes

0 answers

216 views

Is there an algorithm to diagonalize a matrix using gauge transformations

mathematical-physics gauge-theory integrable-systems

asked May 19, 2016 at 17:09

4 votes

1 answer

945 views

Question on derivation of Ward identity

quantum-field-theory gauge-theory group-theory lie-algebra ward-identity

asked Mar 19, 2014 at 1:04

4 votes

2 answers

630 views

Why do we require manifolds to be a topological space?

mathematical-physics differential-geometry topology

asked Mar 30, 2014 at 23:51

3 votes

2 answers

959 views

Why do we require the generators of $\mathrm{SU(N)}$ gauge theories to be $N \times N$ matrices?

gauge-theory group-theory group-representations lie-algebra yang-mills

asked Mar 9, 2014 at 2:29

3 votes

3 answers

508 views

Naive question about the S-matrix

quantum-field-theory scattering hilbert-space s-matrix-theory

asked Jan 18, 2014 at 18:41

3 votes

0 answers

122 views

Why is general relativity considered to be a gauge theory? [duplicate]

general-relativity gauge-theory

asked Feb 5, 2014 at 15:02

3 votes

1 answer

430 views

Question about Weinberg's derivation of a one-particle states under the Poincare group

quantum-field-theory special-relativity quantum-interpretations poincare-symmetry

asked Nov 21, 2013 at 17:09

3 votes

1 answer

1k views

Trying to rhyme Peskin and Schroeder with Weinberg

quantum-field-theory special-relativity poincare-symmetry

asked Nov 22, 2013 at 18:25

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31 Questions

Large and small gauge transformations?

In what sense is the renormalization group equation a group?

$\mathrm{SU(3)}$ decomposition of $\mathbf{3} \otimes \mathbf{\bar{3}} = \mathbf{8} \oplus \mathbf{1}$?

Green's function in path integral approach (QFT)

Are "confinement" and "asymptotic freedom" two sides of the same coin?

How do we know for sure a theory is non-renormalizable?

Could spontaneous symmetry breaking happen again in our universe?

Lorentz transformation of the Spinor Field

Hodge star operator on curvature?

Unitary Lorentz transformation on quantized Dirac spinor

QFT Dyson series: why are we solving the Schrodinger equation?

Question about the Noether charge algebra

What is the exact relation between $\mathrm{SU(3)}$ flavour symmetry and the Gell-Mann–Nishijima relation

How does the renormalization scale $\mu$ cancel in all finite observables?

How many physical degrees of freedom does the $\mathrm{SU(N)}$ Yang-Mills theory have?

Background Gauge Condition In Moduli Space

Proof that we can always find a gauge transformation such that $A_0=0$?

Question about the Killing form in Georgi

How do we measure the physical field of a particle?

Evaluate $1$-loop contribution to the $4$-point Green's function

Help in deriving the Adler-Bell-Jackiw anomaly

Is there a table that sums up the parameters, the assumptions/symmetries, and the predictions of the standard model?

Is there an algorithm to diagonalize a matrix using gauge transformations

Question on derivation of Ward identity

Why do we require manifolds to be a topological space?

Why do we require the generators of $\mathrm{SU(N)}$ gauge theories to be $N \times N$ matrices?

Naive question about the S-matrix

Why is general relativity considered to be a gauge theory? [duplicate]

Question about Weinberg's derivation of a one-particle states under the Poincare group

Trying to rhyme Peskin and Schroeder with Weinberg