User ann marie cœur

13 votes

1 answer

703 views

If the classical Maxwell theory describes E&M fairly, how well-done is the classical Yang-Mills theory for chromodynamics?

asked Sep 29, 2017 at 21:09

7 votes

3 answers

1k views

Quantum Anomalies for Bosons

quantum-field-theory particle-physics symmetry-breaking quantum-anomalies

asked Mar 21, 2014 at 2:22

7 votes

1 answer

267 views

Non-abelian string in QCD?

string-theory gauge-theory field-theory quantum-chromodynamics yang-mills

asked Jun 18, 2017 at 0:57

7 votes

3 answers

435 views

Are neutrons gauge neutral to all gauge forces?

quantum-field-theory particle-physics standard-model gauge-theory neutrons

asked Apr 1, 2020 at 2:31

7 votes

2 answers

2k views

Primordial black hole vs. black hole

general-relativity cosmology gravity black-holes big-bang

asked Feb 11, 2021 at 0:27

6 votes

2 answers

396 views

Complex Lie algebra vs Real Lie algebra in Physics

differential-geometry group-theory lie-algebra complex-numbers

asked Oct 10, 2020 at 22:15

6 votes

0 answers

414 views

Weyl transformation vs diffeomorphism; conformal invariant vs general in/covariant

general-relativity differential-geometry coordinate-systems conformal-field-theory diffeomorphism-invariance

asked Oct 11, 2020 at 18:19

6 votes

1 answer

356 views

Electric dipole moment (EDM) and magnetic dipole moment (MDM): CP violation in neutron

quantum-field-theory particle-physics nuclear-physics beyond-the-standard-model cp-violation

asked Dec 26, 2020 at 23:30

5 votes

3 answers

337 views

WHY BRST formulation works: Conditions imposed on QFT to find (how many) BRST parameters

quantum-field-theory string-theory mathematical-physics quantization brst

asked Oct 6, 2020 at 20:59

5 votes

2 answers

235 views

Paul Dirac on Dimensionless Physical Constants and $\alpha\sim\frac{1}{137}$

electromagnetism experimental-physics quantum-electrodynamics renormalization physical-constants

asked Mar 5, 2021 at 0:37

5 votes

7 answers

1k views

Do the "colors" live in a 3-dimensional vector space? [closed]

electromagnetic-radiation visible-light wavelength vision popular-science

asked Apr 1, 2021 at 22:46

5 votes

1 answer

118 views

Coleman–Mandula theorem and its assumptions on QFT

quantum-field-theory symmetry mathematical-physics conformal-field-theory poincare-symmetry

asked Apr 16, 2021 at 5:29

5 votes

1 answer

448 views

$SU(5)$ representation and higher anti-symmetric traces

quantum-field-theory group-theory yang-mills quantum-anomalies grand-unification

asked Aug 1, 2018 at 22:08

5 votes

1 answer

80 views

Internal flavor symmetry of the $N$ left-handed complex Weyl spinors v.s. $N$ real Majorana spinors: ${\rm U}(N)$ vs. ${\rm O}(2N)$ or ${\rm O}(N)$

quantum-field-theory group-theory fermions spinors majorana-fermions

asked Apr 5, 2020 at 0:32

5 votes

1 answer

311 views

How to classifies the distinct "plasma" phases of matter?

condensed-matter solid-state-physics phase-transition plasma-physics

asked Oct 30, 2016 at 22:56

5 votes

2 answers

794 views

Effects of Topological Terms: Hopf, $\Theta$, Chern-Simons, WZW, Berry phase term

topological-field-theory topological-phase chern-simons-theory berry-pancharatnam-phase non-perturbative

asked Oct 16, 2017 at 2:45

5 votes

2 answers

252 views

Construct an $SO(3)$ rotation inside two $SU(2)$ fundamental rotations

quantum-mechanics group-theory representation-theory lie-algebra linear-algebra

asked Apr 21, 2018 at 23:02

5 votes

0 answers

119 views

Comparison between $U(1)$, $SU(N)$ and $SO(N)$ instantons

mathematical-physics gauge-theory group-theory yang-mills instantons

asked Jun 18, 2018 at 0:41

5 votes

1 answer

230 views

Nonrenormalizable but quantizable theory: gravity?

quantum-field-theory definition renormalization quantum-gravity dimensional-analysis

asked Jun 13, 2021 at 21:02

4 votes

0 answers

69 views

Zee Chapter VII.5: Can the fermion $10$ be the composite of fermion $5^*$?

quantum-field-theory particle-physics representation-theory beyond-the-standard-model grand-unification

asked Jun 20, 2021 at 18:41

4 votes

0 answers

71 views

Figure of $SO(10)$ grand unified theory in $E_6$ from Wikipedia

quantum-field-theory particle-physics representation-theory beyond-the-standard-model grand-unification

asked Jun 6, 2021 at 21:43

4 votes

1 answer

357 views

Real Majorana wavefunction / field: What is the big deal?

quantum-mechanics quantum-field-theory particle-physics second-quantization majorana-fermions

asked Jun 14, 2018 at 21:42

4 votes

1 answer

245 views

2D anomaly-free condition for a gauge theory

quantum-field-theory gauge-theory group-theory representation-theory quantum-anomalies

asked Jul 17, 2018 at 3:36

4 votes

0 answers

91 views

Ghost in quantum many body systems

quantum-field-theory condensed-matter second-quantization ghosts emergent-properties

asked Jul 22, 2018 at 21:46

4 votes

1 answer

181 views

U(1) Dirac string moved to the SU(2) or SO(3) gauge theory

quantum-field-theory mathematical-physics gauge-theory second-quantization beyond-the-standard-model

asked Jul 23, 2018 at 19:43

4 votes

1 answer

278 views

Symmetry breaking of $SO(10)$ or $Spin(10)$

quantum-field-theory group-theory representation-theory symmetry-breaking grand-unification

asked Jul 30, 2018 at 21:06

4 votes

1 answer

86 views

Elegant theoretical way(s) to prove the $U(1)$ electric charge of electron + proton $Q_e+Q_p=0$?

particle-physics charge beyond-the-standard-model

asked Jul 16, 2020 at 20:48

4 votes

0 answers

83 views

$\rm SO(10)$ grand unified model restores the parity symmetry lost in $\rm SU(5)$ model

group-theory representation-theory beyond-the-standard-model parity grand-unification

asked Jul 21, 2020 at 4:23

4 votes

0 answers

169 views

Legal values of quantum field can take? $\mathbb{R}$, $\mathbb{C}$, $\mathbb{H}$, ..?

quantum-field-theory mathematical-physics second-quantization classical-field-theory spin-statistics

asked May 28, 2019 at 0:46

4 votes

1 answer

175 views

Is it accidental or deeply meaningful that the Higgs and the left-handed lepton have the same quantum numbers?

standard-model representation-theory higgs electroweak leptons

asked Mar 20, 2021 at 18:35

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180 Questions

If the classical Maxwell theory describes E&M fairly, how well-done is the classical Yang-Mills theory for chromodynamics?

Quantum Anomalies for Bosons

Non-abelian string in QCD?

Are neutrons gauge neutral to all gauge forces?

Primordial black hole vs. black hole

Complex Lie algebra vs Real Lie algebra in Physics

Weyl transformation vs diffeomorphism; conformal invariant vs general in/covariant

Electric dipole moment (EDM) and magnetic dipole moment (MDM): CP violation in neutron

WHY BRST formulation works: Conditions imposed on QFT to find (how many) BRST parameters

Paul Dirac on Dimensionless Physical Constants and $\alpha\sim\frac{1}{137}$

Do the "colors" live in a 3-dimensional vector space? [closed]

Coleman–Mandula theorem and its assumptions on QFT

$SU(5)$ representation and higher anti-symmetric traces

Internal flavor symmetry of the $N$ left-handed complex Weyl spinors v.s. $N$ real Majorana spinors: ${\rm U}(N)$ vs. ${\rm O}(2N)$ or ${\rm O}(N)$

How to classifies the distinct "plasma" phases of matter?

Effects of Topological Terms: Hopf, $\Theta$, Chern-Simons, WZW, Berry phase term

Construct an $SO(3)$ rotation inside two $SU(2)$ fundamental rotations

Comparison between $U(1)$, $SU(N)$ and $SO(N)$ instantons

Nonrenormalizable but quantizable theory: gravity?

Zee Chapter VII.5: Can the fermion $10$ be the composite of fermion $5^*$?

Figure of $SO(10)$ grand unified theory in $E_6$ from Wikipedia

Real Majorana wavefunction / field: What is the big deal?

2D anomaly-free condition for a gauge theory

Ghost in quantum many body systems

U(1) Dirac string moved to the SU(2) or SO(3) gauge theory

Symmetry breaking of $SO(10)$ or $Spin(10)$

Elegant theoretical way(s) to prove the $U(1)$ electric charge of electron + proton $Q_e+Q_p=0$?

$\rm SO(10)$ grand unified model restores the parity symmetry lost in $\rm SU(5)$ model

Legal values of quantum field can take? $\mathbb{R}$, $\mathbb{C}$, $\mathbb{H}$, ..?

Is it accidental or deeply meaningful that the Higgs and the left-handed lepton have the same quantum numbers?