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In the previous posting I demonstrated that the pion of M89 is rather Higgs like as far as the decays to electro-weak boson pairs are considered since the gauge kinetic term of the action is in both cases responsible for these decays. There is however an anomalous production of gamma pairs due to the anomalous decays of the pion to gamma pairs resulting from axial current anomaly. Earlier I ended up with erraneous hypothesis that the anomaly term alone is enough. The reason for the error was rather banal: I confused number and its inverse with each other! In the following I will demonstrate that the argument works also at the quantitative level.
To see that the model indeed survives also quantitative tests one can consider the decay rate of pion like state to gamma pairs using PCAC. Axial current anomaly tells that the divergence ∂μAμ of the axial current equals to fπmπ2π0, where π0 is the neutral pion field. Axial current divergence contains a part proportional to the instanton density for electromagnetic field and this defines the effective action allowing to calculate the production amplitude and rate for gamma pairs.
Γ(π) = α2mπ2/64π2fπ2 .
fπ is expected to be of order mpi. Let us write fπ=Xmπ.
Γ(h)= α2 gW2 2-10π-3 mh3mW-2 .
The prediction is exactly the same in the case of M89 pion. One only replaces scalar with pseudoscalar and Higgs vacuum expectation with that for pseudoscalar and given by PCAC anomaly expressible in terms of instanton density for classical induced em field Fem associated with the space-time sheet assignable to colliding quarks and defining the hadronic space-time sheet for M89 hadron physics (note that this space-time sheet could be also assicated with colliding protons).
π0(vac)=-[1/32π2 mπ2fπ]× I , I=εαβγδFemαβFemγδ= 2E•B .
Here Fem is defined by identifying gauge potential as eAmu, which corresponds to the classical gauge potentials in TGD. It is essential that the induced electric and magnetic fields are non-orthogonal: this is true if CP2 projection of space-time sheet has dimension larger than d=2: this is actually always the case for preferred extremals so that the generation of the analog of Higgs expectation is basic phenomenon in TGD Universe but does not give rise to massivation. Instanton density I appears as a parameter which is in the first approximation constant.
r == Γ(h)/Γ(π) = X2[α× sin2(θW)]-1 .
Some comments about the result are in order.
The relative phase of the amplitudes from anomaly and kinetic term is expected to vary and the first guess is that the interference term gives a vanishing contribution average contribution. Local constructive interference in phase space would allow to understand the local values of r above 1.61. The ratio of the observed Higgs to gamma pair signal cross section to the predicted one is certainly consistent with this picture!
One cannot predict absolute production rates without a detailed model for the electric and magnetic fields of colliding quarks or protons predicting the instanton density I. This kind of model has been proposed in kenociteallb/leptc.
For a TGD based discussion of the general theoretical background for Higgs and possible TGD inspired interpretation of the new particle as pionlike state of scaled variant of hadron physics see Is it really Higgs?. See also the chapter “ New particle physics predicted by TGD: Part I of “p-Adic Length Scale Hypothesis and Dark Matter Hierarchy”.
2012-08-04 18:45:43
Source: http://matpitka.blogspot.com/2012/08/is-it-indeed-m-89-pion.html