I recently came across this article, published in the respectable European Physical Journal A. (Apparently, there isn't any corresponding arXiv article for this, so I'm sorry if everyone isn't able to access the article.)
Here's the possibility that the author has suggested:
While looking for the putative Higgs boson of the Standard Model of particle physics, recently, the CMS and the ATLAS experiments at CERN have found strong signals of a new particle at about 125 GeV. …
Here we show that what they may have found at 125 GeV is the long sought for and missing ingredient of the strong interaction: the sigma-meson of the Chiral Sigma Model, within the framework of the Skyrme model with a topological interpretation of the baryons. Just like a massless gauge boson is a requirement, and hence a prediction of the local gauge theories, in the the same manner, a very heavy scalar meson is a requirement and hence a prediction of the Skyrme model of the hadrons. The 125 GeV particle discovered by the CMS and the ATLAS groups may be an experimental confirmation of this unique prediction of the topological Skyrme model. However the bottom line is that even if the experimentalists finally confirm that this 125 GeV entity is the expected Higgs boson, then there still remains to discover another heavier scalar particle as the sigma-meson of the chiral sigma model/Skyrme model, which remains its unique prediction, as shown in this paper.
I appreciate that the physics community in general must be very confident that they have identified Higgs correctly (they wouldn't have awarded a Nobel prize if there was any doubt remaining).
The point is, while hoaxes keep sprouting up all the time, this is a well-sourced and peer-reviewed article. Does this possibility appear irrational for any definite reason? Especially since this $\sigma$ meson is still elusive?
Edit : Found another. This one is in Phys. Rev. D and incidentally carries the same name as my question title ! Here are the links – PRD Link, arxiv link
Best Answer
Outdated by now, but...
The most fool-proof way to confirm if the particle you found in an accelerator is what you think, is to check its decays to other particles. The production of particles from the 125GeV thing falls more and more closely to the Higgs expectations; existing deviations are generally ascribed to experimental difficulties in identifying some of the product particles.
(For the current status of the situation you can see the experimental summary of the electroweak session at the Moriond conference. [large file])