Re: How real are the "Virtual" partticles?

Eugene Stefanovich wrote:

Arnold Neumaier wrote: 

When the S-matrix is calculated,
we use the Hamiltonian expressed in terms of bare particles
and we take the initial and final states formed as a^*b^*...|0>
where a^*, b^*, etc are the same operators of bare particles, and
|0> is bare vacuum.


No. This is only the unrenormalized, meaningless version.
The renormalized, physical version is about the behavior of
physical, dressed states.

Why you call this version meaningless? 

unrenormailzed = meaningless,
renormalized = physical.


Arnold Neumaier

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