Hep

An interesting topic to be discussed in the next weeks is how supersymmetry could solve the gauge hierarchy problem. Roughly speaking the idea is that due to the additional symmetry, quadratic divergences should cancel between the bosons and fermions.

An interesting approach to this is presented in Polonsky's Book: Supersymmetry: Structure and Phenomena. (A preprint version can still be found on arXiv.) In the chapter 3, the author follows a bottom-up approach: he is constructing a theory in which all the quadratic divergences are set to cancel. He then shows how this can be related to SUSY.

On Monday, 19th of November, I will present "Astrophysical Bounds on the Photon Charge and Magnetic Moment" by B. Altschul (University of South Carolina, Columbia) : http://arxiv.org/abs/0711.2038.
Jan

TeV gravity in four dimensions? arXiv:0711.2306">http://arxiv.org/abs/0711.2306">arXiv:0711.2306, by Calmet & Hsu. Leonardo & Alessandre


For coming literature reviews, please modify this one ("Administration -> Manage existing articles").

MVH

23/Oct: Is there a new physics between electroweak and Planck scales? (Jan)
30/Oct: Is there a new physics between electroweak and Planck scales? [continued] (Jan)
06/Nov: Brans-Dicke gravitation (Daniel)
13/Nov: Brans-Dicke gravitation [continued] (Daniel) & Gauge Hierarchy Problem (Claude)
20/Nov: Hierarchy Problem using Dimensional Regularization (Alessandro)
27/Nov: Barbieri "Ten Lectures on EW Interactions" [Sections 1-4] (Claude & Marc)
04/Dec: Barbieri "Ten Lectures on EW Interactions" [Sections TBA]

Here some suggestions by Alexey, Claudio, Riccardo, ... :
New articles are added on top of this list ("Administration -> Manage existing articles").

December :
A) arXiv:0708.1281
or a new paper on the same topic :
arXiv:0712.1230
Anomaly mediated neutrino-photon interactions

November :

A)arXiv:0711.2274
de Sitter Relativity: a New Road to Quantum Gravity

A)arXiv:0711.1967
Radiation Driven Inflation

A)arXiv:0704.1845
The Lee-Wick Standard Model

A)arXiv:0705.1749
Warped Leptogenesis with Dirac Neutrino Masses

A)arXiv:0705.2029
Ultrahigh-energy neutrino flux as a probe of large extra-
dimensions

A)arXiv:0705.2047
Non-Metric Gravity II: Spherically Symmetric Solution, Missing
Mass and Redshifts of Quasars

A)arXiv:0705.2643
Symmetries,Singularities and the De-Emergence of Space

A)arXiv:0709.3189
The necessity of dark matter in MOND within galactic scales

The seminar announcements can be found on this webpage.

Please feel free to suggest any interesting papers for litterature review :)

E-mail : tmhep@groupes.epfl.ch

* Accelerator Theory (presented by experimentalist from 6th floor)
* Coleman-Weinberg paper
* Strong CP problem
* Renormalization group: Standard vs. Wilsonian approach
* How is SUSY supposed to solve the Hierarchy Problem?
* finish discussing gauge hierarchy problem within dimensional regularisation
* . . .

Daniel is going to present Brans-Dicke theory of gravitation.

We will mainly discuss the first paper.

But, I also recommend the second one, quite interesting.

cya

• C Brans - H Dicke - Mach's Principle and a Relativistic Theory of Gravitation.pdf
• Carl H Brans - The roots of scalar-tensor theoryan approximate history.pdf

So this morning we had the first real meeting. In my opinion it was interesting, and I really think it is a good point if Oleg or any other senior physicist could come.

Now we have to decide what to do the coming weeks ; it would be good if we knew more in advance what will come (I apologize for this time). I also think this blog is a good place to write down what happens.

Next week we will for sure finish the discussion about Misha's paper, meaning in particular the introduction of his model.
Other topics which will be covered :
- Coleman & Weinberg
- "Affleck-Dine gravity" ; proposed by Daniel

For me it would be interesting to look also in more details at other scenarios for BSM ; in particular those which are not studied by any group here at EPFL. I think at :
- GUT : look at one example just to get a more precise idea
- Technicolor
- Little Higgs

I think I have written enough for my first post ; please react and propose other topics.

MVH

Jan