All Questions
Tagged with symmetry-breaking supersymmetry
42
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How does spontaneous supersymmetry breaking lead to different masses between superpartners?
For the past few days I've been studying supersymmetric quantum mechanics. My main sources that I use are David Tong's lecture notes on supersymmetric quantum mechanics, as well as Edward Witten's ...
- 29
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The difference between High energy SUSY and low energy SUSY
In the literature and comments, I have met two pieces of jargon:
Low energy SUSY,
High energy SUSY
I'm confused about the technical and well-defined conceptual differences between the two type of ...
- 1,212
1
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199
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Momentum maps and supersymmetry
While reading a paper by Gaiotto et al., I stumbled upon the concept of momentum maps where they are used in section 2.1 to characterise the vaccum structure of some theory.
I tried reading the ...
- 4,088
3
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Relation between RG flow and space of vacua
When studying supersymmetric QFT's, it is very common to compute the moduli space of the theory by solving all F-term equation (derivatives of the superpotential). More precisely, one should also ...
- 1,044
2
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Gauge-mediated SUSY breaking mechanism explained in simple terms
How can the basics of gauge-mediated SUSY breaking mechanism be explained in simple terms?
(sample explanation of EW SSB, for reference: “electroweak symmetry is broken due to a non-vanishing value of ...
- 127
2
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109
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On Goldstone fermions / goldstino: SUSY breaking
There are statements about Goldstone fermions, or goldstino, seem confusing to me.
(1) Goldstone boson requires a continuous symmetry spontaneously broken. Does Goldstone fermion imply continuous SUSY ...
- 4,336
1
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101
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Supersymmetry non-breaking $\iff$ no "Goldstone fermion"?
In Supersymmetry and Morse Theory (1982) by E Witten,
Concern whether the supersymmetry is broken by checking whether
$$
Q | 0 \rangle=0
$$
exists or not --- Witten said:
SUSY breaking: A solution ...
- 4,336
2
votes
1
answer
61
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Non-extended and extended SUSY
What are the distinctions between Non-extended SUSY and Extended SUSY?
(Is that just a non-extended SUSY has $\mathcal{N}=1$ while the extended SUSY has $\mathcal{N}>1$ ? Then there is no ...
- 4,336
1
vote
1
answer
79
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Witten index of a gas
I was reading a paper that studies a gas of fermions and bosons.
It states that "due to physical background", the Witten index $\Delta=Tr[(-1)^{F}e^{-\beta H}]$ equals 1. I have read that in ...
- 145
6
votes
1
answer
265
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No equal boson/fermion masses when supersymmetry is broken?
I am currently studying the paper by Witten on supersymmetry and Morse theory. In the introduction it is stated that when supersymmetry is not broken, i.e. $Q|0\rangle=0$, the Hilbert space contains ...
2
votes
1
answer
166
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Layman's questions about Supersymmetry
Please help me with two very silly questions.
Assuming supersymmetry is correct, why don't we observe the superpartners of the Standard Model particles at ordinary energies? Why do we have to search ...
- 11.8k
5
votes
2
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502
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Spontaneous breaking of supersymmetry
I am a beginner in SUSY Quantum mechanics. I had read that the symmetry is spontaneously broken if $A \left|\psi \right>_n^{(1)}\neq 0 $ and symmetric if $A \left|\psi \right>_n^{(1)}= 0. $ But ...
- 1,348
2
votes
1
answer
146
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SUSY Breaking in the Vacuum
Under what conditions is supersymmetry preserved in the vacuum state? In particular, suppose I have some super potential $W(x)$ which does not permit normalizable ground-state wave functions (such as $...
- 429
1
vote
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81
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Super GoldStone model and SuperHiggs theorem
I am currently studying SuperSymmetry and I have reached a problem which I have not found an answer to.
I clearly understand how the Goldstone theorem works for the boson case (without any susy) ...
- 111
6
votes
1
answer
218
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Is Lorentz symmetry broken if SUSY is broken?
I have seemingly convinced myself that the entire Poincare group is spontaneously broken if one of the supersymmetric charges is spontaneously broken.
We know that if one of the supersymmetric ...
- 3,514