Yuri,
thanks for the reference to the recent paper at arXiv 1207.6015 by Moffatt that proposes to identify the 125 GeV LHC observation as a quark-based meson pseudoscalar.
Moffat also has an even more recent version 5 of arXiv 1204.4702 in which he says
"... We conjecture that a 125 GeV resonance ... composed of a quark-antiquark state may have been observed at the LHC ...".
I had earlier made a similar proposal in papers such as viXra 1203.0027
but Moffatt seems to have been unaware of my efforts because he makes no reference to my work.
However,
in light of the 2012 LHC data released around July 2012,
I think that the 125 GeV observation is most likely the Higgs and not such a pseudoscalar meson.
Prior to that, based on LHC data through 2011, there were two digamma bumps:
around 125 GeV (a cross section somewhat higher than Higgs expectation)
and
around 137 GeV (a cross section somwhat lower than Higgs expectation).
My earlier proposal was that
a Higgs was around 137 GeV
and
a pseudoscalar meson was around 125 GeV.
When the 2012 LHC observations were announced in July 2012
the new data showed in both CMS and ATLAS that the 137 digamma bump had gone away (probably a statistical fluctuation) so that
only the 125 GeV digamma bump remained.
My view now is that the Standard Model shows that a Higgs necessarily exists,
while it is not necessary that such a pseudoscalar meson exits,
so
since the LHC sees only one digamma bump (the one around 25 GeV)
it is almost certainly the Higgs and not a pseudoscalar meson.
Of course, if the 137 GeV digamma bump should reappear in the LHC observations for the second half of 2012, then my pseudoscalar meson (and Moffat's) might again become a possibility
but
I do not expect that to happen.
Tony
