What If Missing Particles and Stuff Cannot Be Found?

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Discussion Overview

The discussion revolves around the implications of missing particles and phenomena in theoretical physics, particularly in relation to dark matter, dark energy, and various theoretical constructs like the axion, graviton, and string theory. Participants explore the validity of theories that depend on these unobserved entities and the potential consequences if they are proven not to exist.

Discussion Character

  • Debate/contested
  • Exploratory
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants argue that many theoretical papers rely on the existence of particles like the axion, graviton, and Higgs boson, suggesting that if these particles are not found, the validity of these papers could be questioned.
  • Others express frustration over the reliance on future experiments to validate theories, suggesting that this reliance may reflect a lack of logical inquiry rather than scientific rigor.
  • A participant mentions that string theory currently lacks verifiability and has not made predictions that can be experimentally tested, indicating its status as still developing.
  • Concerns are raised about dark energy and dark matter being treated as "fudge factors" for unexplained phenomena, with some advocating for a return to fundamental mechanics as a means of understanding the universe.
  • Some participants highlight the ongoing search for WIMP dark matter and the uncertainty surrounding its detection, noting that results are not definitive.
  • There is a suggestion that the development of new mathematical frameworks has opened possibilities, but the inability to find predicted entities raises questions about the correctness of current theories.

Areas of Agreement / Disagreement

Participants express a range of views, with some supporting the need for missing particles in current theories while others challenge this perspective. The discussion remains unresolved, with multiple competing views on the implications of missing entities in theoretical physics.

Contextual Notes

Some participants note that the discussion reflects a broader uncertainty in the field regarding the existence of certain particles and the implications for theoretical frameworks. There is also mention of the potential for future discoveries to change the current understanding.

  • #91
SpaceTiger is entirely correct. He is trying to be nice. I am not. Bad science is bad science and both of you guys should know better.
 
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  • #92
Sorry i have gone out of sync with the thread i lost connection to
PF while modifying post to Billy T.
The joys of the internet, can't live with it can't live without it seems
we all have problems from time to time Billy.
 
  • #93
I guess it about time to let this thread slide into the archives, it has been
a revelation to me, and i thank every one who participated, i feel a little
let down that participation was not more diverse, but can understand the
constraints people work under.
 
  • #94
Two new papers.




http://arxiv.org/PS_cache/hep-ex/pdf/0505/0505027.pdf
Title: Searches for the Higgs boson in Minimal Supersymmetric CP-conserving and CP-violating Standard Model scenarios at LEP
Authors: Pamela Ferrari
Comments: 4 pages, 4 figures

It is important to study extended models containing more than one physical Higgs boson in the spectrum. In particular, Two Higgs Doublet Models (2HDMs) are attractive extensions of the SM, predicting new phenomena with the fewest new parameters. The Higgs sector in the Minimal Supersymmetric extension of the SM (MSSM) is a 2HDM itself. The neutral Higgs searches performed at LEP are showing no evidence of the presence of a signal and have therefore been interpreted in the context of 2HDMs. Depending on the model considered exclusion of large regions of the parameter space can be obtained, but the existence of the lightest Higgs boson with masses lower than 90 GeV is not ruled out in all models by LEP. In the MSSM at least one of the neutral Higgs bosons is predicted to have its mass close to the electroweak energy scale; when radiative corrections are included, this mass should be less than about 140 GeV. This prediction provides a strong motivation for searches at present and future colliders.
 
Last edited by a moderator:
  • #95
http://arxiv.org/abs/astro-ph/0505237
Title: Results of a Search for Cold Flows of Dark Matter Axions
Authors: L. Duffy, P. Sikivie, D.B. Tanner, S. Asztalos, C. Hagmann, D. Kinion, L. J Rosenberg, K. van Bibber, D. Yu, R.F. Bradley
Comments: 5 pages, 3 figures

Theoretical arguments predict that the distribution of cold dark matter in spiral galaxies has peaks in velocity space associated with non-thermalized flows of dark matter particles. We searched for the corresponding peaks in the spectrum of microwave photons from axion to photon conversion in the cavity detector of dark matter axions. We found none and place limits on the density of any local flow of axions as a function of the flow velocity dispersion over the axion mass range 1.98 to 2.17 $\mu$eV.
 
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  • #98
Thanks Turbo.

Cosmic Strings have already been mentioned LMs blog site discusses a
recent sighting
 

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