MSLED: A Minimal Supersymmetric Large Extra Dimensions Scenario

In summary, the article proposes a low-energy supersymmetric framework for the low-energy realization of supersymmetry which is very predictive, but differs radically in its phenomenological implications from the supersymmetric Standard Model. The proposal consists of a supersymmetric version of the Large-Extra-Dimensions scenario, with the Standard Model living on a 3-brane, coupled to a bulk sector consisting of six-dimensional supergravity. This picture is motivated by a promising recent attempt (hep-th/0304256) to naturally understand the observed dark energy density, and this connection with dark energy prevents making the extra dimensions smaller than of order 5 $\mu$m. The resulting inability to change this size makes the model
  • #1
alexsok
123
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http://arxiv.org/abs/hep-ph/0404135

We propose a framework for the low-energy realization of supersymmetry which is very predictive, but differs radically in its phenomenological implications from the supersymmetric Standard Model (minimal or otherwise). The proposal consists of a supersymmetric version of the Large-Extra-Dimensions scenario, with the Standard Model living on a 3-brane, coupled to a bulk sector consisting of six-dimensional supergravity. This picture is motivated by a promising recent attempt (hep-th/0304256) to naturally understand the observed dark energy density, and this connection with dark energy prevents making the extra dimensions smaller than of order 5 $\mu$m. The resulting inability to change this size makes the model very predictive, and easily falsifiable within the near future. Being supersymmetric, it may plausibly be embedded into a more fundamental theory such as string theory, in which case an additional 4 compact dimensions may also be present having inverse radii at the TeV scale or higher. The model is close to, but consistent with, current experimental constraints. We outline possible phenomenological implications for particle physics (both at accelerators and elsewhere), for precision tests of gravity, for astrophysics and for cosmology.

Cogitations and comments are welcome! :biggrin:
 
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  • #2
alexsok said:
http://arxiv.org/abs/hep-ph/0404135

Cogitations and comments are welcome! :biggrin:

One of the authors, Cliff Burgess, should be known to many by his LivingReviews article

http://arxiv.org/gr-qc/0311082 [Broken]

"Quantum Gravity in Everyday Life: General Relativity as an Effective Field Theory"

56 pages, 2 figures, Invited review to appear in Living Reviews of Relativity
Journal-ref: Living Rev. Relativity 7, (2004), 5; (online article: http://www.livingreviews.org/lrr-2004-5)

Abstract: "This article is meant as a summary and introduction to the ideas of effective field theory as applied to gravitational systems.
Contents:
1. Introduction
2. Effective Field Theories
3. Low-Energy Quantum Gravity
4. Explicit Quantum Calculations
5. Conclusions "
 
Last edited by a moderator:
  • #3
if a perceived single dimension can have "hidden" dimensions, can
these hidden dimensions also harbor hidden dimensions ad infinitum?
 

1. What is the MSLED scenario?

The MSLED scenario is a theoretical model in particle physics that proposes the existence of large extra dimensions in addition to the three spatial dimensions we experience in our everyday life. It is based on the concept of supersymmetry, which suggests that every known particle has a corresponding partner particle with opposite spin.

2. How does the MSLED scenario differ from other supersymmetric models?

The MSLED scenario differs from other supersymmetric models in that it incorporates the existence of large extra dimensions, which could explain the weakness of gravity compared to other fundamental forces. This is known as the hierarchy problem. In other supersymmetric models, this problem is addressed through other mechanisms.

3. What implications does the MSLED scenario have for experimental physics?

The MSLED scenario predicts the existence of new particles, such as Kaluza-Klein gravitons, which could be detected through experiments at high-energy particle accelerators like the Large Hadron Collider (LHC). It also suggests modifications to the Standard Model of particle physics, which can be tested through precision measurements of known particles.

4. What evidence supports the MSLED scenario?

Currently, there is no direct evidence for the MSLED scenario. However, it provides a possible solution to the hierarchy problem and is consistent with some experimental observations, such as the existence of dark matter. Further evidence may be obtained through experiments at the LHC or other future particle accelerators.

5. What are the potential implications of the MSLED scenario for cosmology?

The MSLED scenario could have significant implications for cosmology, as it suggests that our universe may be part of a larger multidimensional space. It could also provide explanations for the observed accelerating expansion of the universe and the presence of dark matter. However, more research and observations are needed to fully understand the cosmological implications of the MSLED scenario.

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