Supersymmetry Definition and 124 Threads

I've managed to account for all the terms except for two, which seem to have a minus sign I cannot get rid of. When expanding the variation, one of them comes from the ##\phi## variation: $$-i \partial^\mu \phi \epsilon^\dagger \sigma^2 \partial_\mu \chi^* =-i \partial^\mu \phi \partial_\mu...

I'm currently trying to learn Clifford algebra or more specifically spinors, in higher dimensions. My goal is to study AdS/CFT, but an essential part of learning it is to understand SUSY which then needs some element of Clifford algebra in higher dimensions. I have consulted, Introduction to...

we can se many particles, also we can detect and produce antimatter however my question is why even at high energies we can not see any supersymmetric partner of a particle ?

Confronted with my inability to grasp Witten's Susy QM examples of supersymmetry breaking, I concluded that the problem was that I was not understanding spontaneous symmetry breaking in simpler contexts. It seems that SSB is not possible in QM because of tunneling between the different states...

Considering the definition of supersymmetry as a set of operators that extend the transformations of Poincare group, I wonder if they are of some value for mathematics, particularly for differential geometry. Most of the formalism I can find relate to "superspace", which does not seem a natural...

Hello, I have been looking at some differential geometry and watching Hirosi's video lecture online: At 1:03:00, I found that they claimed that there is a correspondence between the Hibert space of the symmetric Hamiltonian and the cohomology of the manifold. I am super new to the subject and...

From what I understood Supersymmetry means there are more particles than we currently know about and they are predicted by (some/all, I do not know) versions of String theory. Is it so important to String theory or can it work without SUSY? Thank you!

What is the difference between an anti particle and a super-partner? Would SIMPs fall under the supersymmetry theory, or the anti particle theory, or both?

In supersymmetry, are there corresponding antimatter particles to the Susy sparticles similar to the corresponding standard model antimatter particles, e.g., antiselectron, etc.?

Just very recently I was looking into the subject of supersymmetry. Consider expressions of the form $$ \mathcal{L} = \frac{1}{4\pi} \int_{M^4} d^4x d^2\theta \tau_0(\Lambda_0) \mathrm{Tr} W_\alpha W^\alpha \ + \frac{1}{4\pi} \int_{M^4} d^4x d^2\theta \ \mathrm{Im} \...

In some models of the beginning of the universe, like for example in chaotic inflation, space would stop expanding in some points, creating Hubble volumes that could experience different spontaneous symmetry breaking, which would result in different properties, such as different physical...

According to this this the Darboux transformation preserves the discrete spectrum of the Haniltonian in quantum mechanics. Is there a proof for this? My best guess is that it has to do with the fact that $$Q^{\pm}$$ are ladder operators but I'm not sure.

This is just a quick alert regarding a paper today https://arxiv.org/abs/2005.03048 Exceptional Unification of Families and Forces Alfredo Aranda, Francisco J. de Anda, Stephen F. King [Submitted on 6 May 2020] This work considers the remarkable suggestion that the three families of quarks and...

How was supersymmetry discovered? 13:00 And what were the original motivations for it? Is there some kind of intuitive way to look at and work with the formulas? For instance, in the theory of differential forms, the scalar product of two 1-forms U and V is *(U ∧ *V) = UiVi. It is useful to...

i will enter the Institute Of High Energy Physic in Chinese Academy of Science on September in 2019 to start learning about particle physics. My research direction line in search for the decay of Higgs to Zgamma with CMS

So far no signs of supersymmetry has been found though there are theoretical support for it. Is supersymmetry still possible or has it been proven wrong?

Can someone give me an explanation telling me the actual purpose of supersymmetry and what it’s meant to show or predict or solve?

Super symmetry has lasted a long time and has been searched for with bigger and bigger colliders, And the particles seem to get more and more massive as time goes by, I'm no expert but it seems unlikely That thees super heavy particles exist...

(This is easy for you folks that know SUSY.) I know in SUSY the agent of the EM force is the photino (a spin 1/2 fermion). The EM force that we all learned about in JD Jackson (and the QED version in Sakurai) has the photon (a boson) as the agent of force. Is the SUSY version of E&M, and the QED...

Can someone comment on https://arxiv.org/abs/1703.10188 ? If correct, it seems very important.

52nd Rencontres de Moriond EW 2017 présidé par Lydia Iconomidou-Fayard (LAL), Jean Marie Frere (ULB Brussels) has released results based on 36 fb-1 data @ 13 TEV they compare predictions from SUSY i.e squarks gluinos stops etc, with SM all results consistent with SM 95% No supersymmetry...

there is considerable research interest in supersymmetry, both for string theory and particle physics.What would be the implications to physics if parity symmetry is a fundamental symmetry, and therefore mirror matter and mirror bosons exist? would this imply mirror matter has all same exact...

I had heard of adinkras but didn't realize that they were meant to play this role. Nor did I realize that the representation theory of supersymmetry is mathematically underdeveloped.

14 February 2017: First single experiment observation of the decay Bs0→ μ+μ-. From discovery to precision measurement. [ Branching fraction Bs0→ μ+μ- = (2.8±0.6)x10-9 ; B0→ μ+μ- < 3.4x10-10 ] "“We love this decay because it is one of the most promising places to search for any new effects of...

In supersymmetric extensions of the standard model, the neutralinos and charginos (popular candidates for dark matter) are often included. However, it is known that these fermionic particles are linear combinations of supersymmetric bosinos (such as gauginos and higgsinos). Therefore, it seems...

If we find supersymmetry at the LHC, would this prove asymptotic safety in QG wrong? Here's the article https://arxiv.org/pdf/1508.07411v2.pdf

I was reading some lecture notes on super-symmetry (http://people.sissa.it/~bertmat/lect2.pdf, second page). It is stated that ". In order for all rotation and boost parameters to be real, one must take all the Ji and Ki to be imaginary". I didn't understand the link between the two. What does...

ok guys this should be a quick one... I hope lol In supersymmetry could the other have of the particles be antimatter ?? its looking like the same thing to me... but I could be very wrong. But if I am, why would I be wrong ?? thank you to anyone that takes the time to replay

Is supersymmetry part of string theory or does it have a place in the standard model

haushofer submitted a new PF Insights post General Relativity as a Gauge Theory Continue reading the Original PF Insights Post.

post-LHC run 2, does Supersymmetry worsen hierarchy fine tuning? according to what most theorists argument, the SM has a hierarchy fine tuning in the Higgs sector based on naturalness. The proposed solution to this problem is supersymmetry. post-LHC run 2, no SUSY partners and no hints of SUSY...

in gauge mediated supersymmetry breaking, theories say there is a hidden sector that breaks its own symmetries and then communicates it to a messenger field, which then breaks SUSY. any specific details on the hidden sector and messenger field? i.e what kind of fermions and bosons make up the...

MSSM and nMSSM require 5 higgs like bosons in addition to the 126 GEV the SM predicts. thus far LHC has not found any of them. what masses are predicted for Natural SUSY for these additional higgs and how much of a problem is it that the LHC has not found them? if natural SUSY is correct...

Urs Schreiber submitted a new PF Insights post 11d Gravity From Just the Torsion Constraint Continue reading the Original PF Insights Post.

I was wondering since the Vector supermultiplet in N=2 SUSY can be built from a Chiral and a Vector supermultiplet from N=1, in order to make up the off-shell degrees of freedom, would you include the two auxiliary fields from the N=1 theory (traditionally F from the Chiral and D from the vector...

Urs Schreiber submitted a new PF Insights post Why Supersymmetry? Because of Deligne's theorem. Continue reading the Original PF Insights Post.

The LHC nightmare scenario after 15 years of operation and 3000 fb-1 total integrated luminosity at 14 TEV, it only finds Higgs and nothing else. with LHC not finding any SUSY partners and LUX/Panda not finding any WIMPS, obviously SUSY can be adjusted to accommodate these null results...

Hi guys, I have a very basic question about the WZ model. I want to show that it is invariant under SUSY transformations. The action is \int{d^4 x} \partial^\mu \phi* \partial_\mu \phi +i\psi^† \bar{\sigma}^\mu \partial_\mu \psi The SUSY transformations are \delta\phi = \epsilon \psi ...

What other theories this number make impossible or improbable. When final number was given I hear some older physicist saying for one " 40 years of works gone" second grinding "only 30 for me!" We are ask to follow establish science. Seem to me that lots of theories was built on other's ones and...

Dear All I am studying spontaneous breaking of supersymmetry but i am confused about something. Why should the goldstone be a spin 1/2, why it is not a boson? I have read that this is due to supersymmetry is a fermionic symmetry but i am not convinced with this answer! Thank you

Dear All Can anyone suggest me a book as a basic introduction to supersymmetry In fact i have Wess and West but i need other. Thank you

What does it mean that a Killing vector and a total differential of a certain theory are related to bilinears? In other words, why would bilinears (e.g. of the forms ##<\gamma_0\epsilon, \gamma_5\gamma_{\mu}\epsilon>## and ##<\gamma_0\epsilon, \gamma_{\mu}\epsilon>## tell us anything about...

Spinors in $N=2, D=4$ supergravity can be simplified using gauge transformation and thus canonical spinors can be found. In the case of $N=2, D=4$ supergravity the gauge transformation Spin (3,1) is used. My question is how do we know which transformation can be used in a certain theory in order...

Links for [1] and [2] are below. Please have a look here section 12.6 [1]. It says here that Given the action of a supergravity theory, it is generally useful to search for solutions of the classical equations of motion. It is most useful to obtain solutions that can be interpreted as...

what are ramifications of exclusions on SUSY gluino mass 1.8 TEV to MSSM and other SUSY-SM and higgs hirearchy?

When I was studying complex manifolds in a Freedman's SUGRA book, I ran across this. In a complex manifold, the metric is...

The scalar fields of supersymmetric theories in 4 spacetime dimensions are a set of complex fields (usually denoted by ##z^{\alpha}##). How can this be physically translated? More precisely, we know that in 5D, those scalars are real, so what is that makes them real here but complex there?

Hello everybody, Recently, I read this interview with Edward Witten where he claims that supersymmetry is a falsifiable prediction of string theory. But then again, I remember interviews with proponents of supersymmetry where they were asked whether the inability to find any hints of SUSY in...

I have been trying for a while to read a precise definition of a Vector Multiplet (to whom ##N=2## Supergravity theories couple to in ##4D##) but was not lucky in finding a self-contained one. The best I got was that on https://en.wikipedia.org/wiki/Supermultiplet though it was on...

Crossing over the following paragraph: There are three types of special manifolds which we shall discuss, related to the real scalars of gauge multiplets in D = 5, the complex scalars of D = 4 gauge multiplets and the quaternionic scalars of hypermultiplets. Since there are no scalars in the...