If only I was 1/2 as smart as he is.....
Actually, I'd settle being twice his age

I looked at the Wikipedia page and then called my son to ask him about it. He said his paper actually starts with that and goes into more depth and detail.BlaineG wrote:I tried Googling that, and didn't understand the explanation![]()
Simple, but rather than re-write what's been written:COSteve wrote:Minimal Supergravity Mediated Supersymmetry??
Oh, now that you said it THAT way.......Chas. wrote:Simple, but rather than re-write what's been written:COSteve wrote:Minimal Supergravity Mediated Supersymmetry??
"We analyze simple models of gauge mediated supersymmetry breaking in the context of supergravity. We distinguish two cases. One is when the messenger of the supersymmetry breaking is a non Abelian gauge force and the other is when the messenger is a pseudoanomalous U(1). We assume that these models originate from string theory and we impose the constraint of the vanishing of the cosmological constant requiring also the stabilization of the dilaton. In the first case, we do not find vacua that are consistent with the constraints of gauge mediation and have a zero tree level cosmological constant. In the second case, no such conflict arises. In addition, by looking at the one loop cosmological constant, we show that the dilaton F-term can not be neglected in either case. For the gauge mediated case our considerations suggest that the dilaton must be frozen out of the low energy field theory by non-perturbative string dynamics." - S. P. de Alwis and Nikolaos Irges of the U. of Colorado, Butler
I hope this will aid in understanding.
That sums it up nicely. Can we quotient you on that?damienph wrote:Apparently, besides limited math skills, I can't spell either.
3 Times! That, in itself, is an accomplishment.COSteve wrote:... after reading it 3 times I'm still not sure what I read!
Nope, you missed one... It's called "complication"."There are only four operations in mathematics: addition, subtraction, multiplication, and division."
My son knows Professor de Alwis as he is doing his grad work at University of Colorado, Boulder (not Butler) and has read the paper in which that quote is from. Only trouble is that the quote above is referring to Gauge Mediated Supersymmetry Breaking (GMSB), not Minimal Supergravity Mediated Supersymmetry. Well, that's what my son said anyway. I don't know enough about either one to be sure I'm even spelling them correctly!Chas. wrote:Simple, but rather than re-write what's been written:COSteve wrote:Minimal Supergravity Mediated Supersymmetry??
"We analyze simple models of gauge mediated supersymmetry breaking in the context of supergravity. We distinguish two cases. One is when the messenger of the supersymmetry breaking is a non Abelian gauge force and the other is when the messenger is a pseudoanomalous U(1). We assume that these models originate from string theory and we impose the constraint of the vanishing of the cosmological constant requiring also the stabilization of the dilaton. In the first case, we do not find vacua that are consistent with the constraints of gauge mediation and have a zero tree level cosmological constant. In the second case, no such conflict arises. In addition, by looking at the one loop cosmological constant, we show that the dilaton F-term can not be neglected in either case. For the gauge mediated case our considerations suggest that the dilaton must be frozen out of the low energy field theory by non-perturbative string dynamics." - S. P. de Alwis and Nikolaos Irges of the U. of Colorado, Butler
I hope this will aid in understanding.
Chas. wrote:Simple, but rather than re-write what's been written:COSteve wrote:Minimal Supergravity Mediated Supersymmetry??
"We analyze simple models of gauge mediated supersymmetry breaking in the context of supergravity. We distinguish two cases. One is when the messenger of the supersymmetry breaking is a non Abelian gauge force and the other is when the messenger is a pseudoanomalous U(1). We assume that these models originate from string theory and we impose the constraint of the vanishing of the cosmological constant requiring also the stabilization of the dilaton. In the first case, we do not find vacua that are consistent with the constraints of gauge mediation and have a zero tree level cosmological constant. In the second case, no such conflict arises. In addition, by looking at the one loop cosmological constant, we show that the dilaton F-term can not be neglected in either case. For the gauge mediated case our considerations suggest that the dilaton must be frozen out of the low energy field theory by non-perturbative string dynamics." - S. P. de Alwis and Nikolaos Irges of the U. of Colorado, Butler
I hope this will aid in understanding.