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.
I'm reading a book on AdS/CFT by Ammon and Erdmenger and chapter 3 covers supersymmetry. This isn't my first look at SUSY but it's my first in depth look to really try to understand it, and when they talk about constructing a Lagrangian for ##\mathcal{N}=1## chiral superfields they write the...
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.
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...
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...
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...
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...
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...
When I was studying complex manifolds in a Freedman's SUGRA book, I ran across this.
In a complex manifold, the metric is
$$ds^2=g_{ab}dz^adz^b\hspace{3cm}(1)$$...
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?
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...
In this http://www.ulb.ac.be/sciences/ptm/pmif/Rencontres/specgeom.pdf, for example on p.7 and in many other references, people usually say:
we will concentrate on the bosonic part of the Lagrangian in N=1 (sometimes N=2) supergravity.
In other incidents, people say, that they are going to...
I will start with a summary of my confusion: I came across seemingly contradictory transformation rules for left and right chiral spinor in 2 books, and am unable to understand what part is Physics and what part is convention. Or is it that one of the two books incorrectly writes the...
In one book of Susskind I found the following claim and I wanted to ask for its basis.
Susskind says that each kind of boson gives positive contribution to the cosmological constant (the lighter, the better). Each kind of fermion gives negative contribution to the cosmological constant. Thus...
http://news.discovery.com/space/lhc-keeps-bruising-difficult-to-kill-supersymmetry-150727.htm
LHC Keeps Bruising 'Difficult to Kill' Supersymmetry
Previous attempts at measuring the beauty quark's rare transformation into a so-called "up quark" had yielded conflicting results. That prompted...
Hello, I have one conceptual question. I have been working on Supersymmetry.
Now, I understand that twice of supersymmetric transformation is equivalent to translation mathematically(naively).
However, I don't quite understand why this should be the case conceptually. Supersymmetric...
Hi everyone,
As of late I've been really wanting to push on with my interest in particle Physics by tackling the rather daunting theoretical model that we call supersymmetry. However, to put it simply, I'm not entirely sure where to start! There's so many different textbooks on the subject out...
In the massless case of N=1 simple supersimetry, the states are labeled by the helicity λ and the four-momentum.
In this case we have two states in the supermultiplet plus CPT conjugates: |pμ, ± λ> and |pμ, ± (λ-½)>
Then there is a λ= {0, ½} supermultiplet (where for example a quark with λ=½...