Here is another suspicious thing about muons:
"
Improved Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant
The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, tau_mu = 2.197013(24) us, is in excellent agreement with the previous world average." --
http://arxiv.org/abs/0704.1981
This looks like a perfectly fine result. Clicking on the link "Which authors of this paper are endorsers?" and this comes up:
David W. Hertzog: Is registered as an author of this paper.
Not currently an endorser. (why?)
Brendan Kiburg: Is registered as an author of this paper.
Not currently an endorser. (why?)
Bernhard Lauss: Is registered as an author of this paper.
Can endorse for nucl-ex. (why?)
David Webber: Is registered as an author of this paper.
Not currently an endorser. (why?)
Peter Winter: Is registered as an author of this paper.
Not currently an endorser. (why?)
None of these persons have endorsed the paper?

Maybe it doesn't mean anything special

and only has to do with the arXiv system, but anyway I think it looks a bit suspicious. Could it be gatekeeper scientists that produced the paper with phony/false data made look convincing?