Supersymmetry Definition and 132 Threads

In 5 years or so, if LHC fails to find any superpartners, are ALL supersymmetric theories dead? Skippy

Hello all Since there seems that quite many here have followed Professor Srednickis QFT book, I want to ask a couple of question I have from his chapter on Supersymmetry. i) on page 617 he defines the kinetic term of the Chiral Superfields as: L_{\text{kin}} = \Phi^{\dagger} \exp(-2gV)...

I know that mirror symmetry resulting in mirror matter and supersymmetry resulting in SUSY partners are two completely distinct fields, and that the original bosonic string theory needs SUSY to get fermions. If mirror matter does exist in the universe, what would this mean in terms of SUSY...

Cargese lectures on string theory with eight supercharges Monica Guica, Andrew Strominger http://arxiv.org/abs/0704.3295 The authors state "Ultimately the most interesting and most physically relevant case is no supersymmetry at all. But at the moment analytic control in this case is quite...

In super yang mills theories in 4,6,10 dimensions, the supersymmetry transformation is often written as (ignoring color indices): \delta A_\mu = i \bar \alpha \gamma_\mu \lambda - i \bar \lambda \gamma_\mu \alpha \delta \lambda = c F^{\mu \nu} [ \gamma_\mu, \gamma_\nu] \alpha where c is...

Could someone help explain how these are related? I kind of understand the Higgs particle/field. It is believed to be the reason why fundamental particles (fermions and bosons) have mass. So, then I read that one of the problems with the Higgs field is that if it is true things should be...

What are some falsifiable predicted consequences of SuperSymmetry? Clearly, if super particles are found, people can rejoice in this new fundamental knowledge of nature. But if it turns out to be a incorrect alley that some theorists journeyed down, do we at least have a way to prove this to...

I was reading a little bit about N = 4 SUSY, and I couldn't help but think that it's like the Pati Salam GUT. To get an N = 4 SUSY theory you can take SO(1,9) and compactify it to four dimensions. In doing so, you get Spin(1,3)XSU(4), where SU(4) is the R symmetry of the theory and Spin(1,3)...

Hello: I`ve heard that supersymmetry predicts new fundamental particles that may explain dark matter, and that dark matter and dark energy is 95 percent of the total mass of the universe... What are these fundamental particles predicted by supersymmetry?, and how...

I am reading Michael Hines new book, Supersymmetry and String Theory. He keeps referring to "tree-level". What is this?

http://www-thphys.physics.ox.ac.uk/users/IanAitchison/susy.pdf http://www.cpt.dur.ac.uk/~georg/ss/ss.htm

Ok, I'm trying to teach myself about supersymmetry, using Weinberg III. My learning style is I don't really read things I just kind of infer what the author means. So I need clarification on a lot. Lets start with the basics, from a mathematical point of view. Where I'm at is at Haag...

Greetings, I calculated a basic O'Raifeartaigh model, using the following potential f = \lambda Y_1 (X^2 - M^2) + \mu Y_2 X , where Y_1, Y_2 and X are chiral superfields. Assuming that the vacuum expectation value of y_1 is zero (where y_1 is the scalar component of Y_1), I get a fermionic...

Greetings everyone, I have to give a lecture about supersymmetry, so I started reading Weinbergs quantum theory of fields vol 3, which is quite of a task. Sometimes I've trouble with some of his conclusions, and I hope you could help me there. I really do not understand how he got to the...

One of the things that LHC will experimentally search for are supersymmetric partners of the Standard-Model particles. Maybe it will found them, maybe it will not. But what if it will? The existence of supersymmetry does not imply the existence of superstrings. However, string theory is...

Hi I have a question concerning the anticommuting variable theta of the superspace manifold: For a proof of some renormalisation theorems I have seen the author make use of the transformation properties of theta under the internal U_R(1) symmetry i.e. he said theta -> exp(-i alpha)*theta ,under...

I recently studied supersymmetry breaking and read there that for Supersymmetry breaking we have the energy of the vacuum state >0. However what I do not really see is why such a vacuum would not break Poincare invariance as well as the energy is part of the momentum 4-vector and so transforms...

Not sure if this is something you'd put in the homework help area or not, but I've started learning supersymmetry and seem to have hit a bump within the first few pages. \delta_{\lambda}\varphi = \frac{1}{2}\lambda^{\mu\nu}M_{\mu\nu}.\varphi for some field \varphi, which is one of S, P or...

I was wondering, OK it is a gedakenexperiment because it is beyond observation, but... how is space-time supersymmetry (no worldsheet susy) supossed to appear from the point of view of states of the fundamental string? Do we observe entities with spin 0 and spin 1/2 having the same mass? And...

Hi, I am interested in teaching myself supersymmetry and supergravity. I have a decent qft background. I know of several good online notes,, but what I really need is a source of good problems. Anybody know where I can find such a source? Does the Wess and Bagger book have good problems...

These are questions for anyone who understands the modern theory of supersymmetry. I have recently read some articles on supersymmetry and its capacity to unify the forces of nature, along with providing a better explanation on the arisal of the higgs mechanism. Q1: Fermions and bosons are...

It's been bugging my for ages, but I cannot see to show the following supersymmetry algebra : \delta_{\epsilon} X^{\mu} = \bar{\epsilon}\bar{\psi} \delta_{\epsilon} \psi^{\mu} = \rho .\partial X^{\mu}\epsilon Using these show that [\delta_{\epsilon_{1}},\delta_{\epsilon_{2}}]X^{\mu} =...

I was wondering, OK it is a gedakenexperiment because it is beyond observation, but... how is space-time supersymmetry (no worldsheet susy) supossed to appear from the point of view of states of the fundamental string? Do we observe entities with spin 0 and spin 1/2 having the same mass? And...

I have Brian Greene's "The Elegant Universe", and am thinking about getting Lisa Randall's "Warped Passages" Yet I'd appreciate any suggestions on books that contain a much larger number of illustrations and graphic analogies. Scientific American often has good articles on M-theory, branes...

Hi, I'm trying to do problem 3.5 of Peskin & Schroeder and I don't know where to start. First of all, I need to get the hermitian conjugate of the following expression \delta \chi = \epsilon F + \sigma^\mu \partial_\mu \phi \sigma^2 \epsilon^\ast where \epsilon is a 2...

Hello, My first post in the forums so please excuse me if there is already a post on this (I couldn't find one). I am not very technical in physics so can you please use simple language :shy: . I am not entirely sure on the concept of supersymmetry, I know stuff like partner of an...

OK, this is so unlike me to advertize a theory activity on Supersymmetry, etc. But as a community service, I thought I should point out to those who are interested, that the Argonne Theory Institute will be starting it's Theory Institute 2005 workshop titled "Supersymmetry, Extra Dimensions, and...

Aaron Bergman has just called attention on science.strings to the new paper hep-th/0503249 which discusses the new idea of "split supersymetry". From the abstract: I don't know if this messes up current plans at Fermilab and CERN for hunting the Higgs. but it does look like it could give...

In a nutshell, could someone refresh my memory on supersymmetry and superparticles. I have trouble understanding these subjects of string theory. Let's say we have a fermonic string of spin -1\2. What is it's superparticle's spin? Is it bosonic? Thanks to all

My name is Unmesh Kamle. I have just passed high school and began reading about Potential wells and about electrons trapped inside them (from Resnick Halliday Krane). I m also reading about Supersymmetry. I m new member on this discussion forum. Could somebody reply to this message so that I can...

I'm sorry marcus, but as you probably know by now, familiarity with the main ideas of string theory and supersymmetry is pretty much mandatory for all students planning to go into theoretical physics, so courses in strings and supersymmetry continue to be a standard part of college syllubi (in...

i am writting a thesis in supersymmetry if someone help me please