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- Path: sparky!uunet!spool.mu.edu!agate!dog.ee.lbl.gov!csa2.lbl.gov!sichase
- From: sichase@csa2.lbl.gov (SCOTT I CHASE)
- Newsgroups: sci.physics
- Subject: Re: Truth vs beauty in physical theories
- Date: 25 Jan 1993 12:32 PST
- Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
- Lines: 44
- Distribution: world
- Message-ID: <25JAN199312321884@csa2.lbl.gov>
- References: <1993Jan24.134137.10915@math.ucla.edu> <0FswXB1w165w@1776.COM> <mcirvin.727989335@husc.harvard.edu>
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- In article <mcirvin.727989335@husc.harvard.edu>, mcirvin@husc8.harvard.edu (Matt McIrvin) writes...
- >
- >Compare this with QCD. QCD is simplicity itself by comparison. The
- >gauge group remains unbroken down to low energies and the couplings
- >are all vector couplings. There's no fundamental scalar necessary, or
- >groupings by chirality into gauge singlets and doublets. The downside is
- >that nobody can do really good calculations since the coupling is so strong.
- >
- >Now, I fervently hope that this picture, which seems to be groping
- >toward extreme elegance, turns out to emerge from something simpler and
- >more beautiful. But I worry that the reason the electroweak part
- >of the standard model seems so much more complicated than the QCD part
- >might be that it's better verified! Might QCD turn out to require nasty
- >tweaking once we get better ways to check theory against experiment?
-
- Indeed. QCD is much less well tested than the Electoweak sector of
- the Standard Model. And QCD has defects, such as the Strong CP problem,
- which are not near being resolved anytime soon. I suspect, and this,
- of course, is pure speculation, that the apparent simplicity of QCD
- is the result more of our Strong Ingorance than due to any intrinsic
- "fundamentalness."
-
- Ultimately, we probably will begin to see better hints of whatever
- simple underlying theory may exist when we have a better idea of
- the proper ingredients of such a theory. If there comes a day when
- we have some confidence that we have a list of all the particles that
- exist, or, on the contrary, some proof that they constitute an infinite
- set, then perhaps the simplicity of the whole thing will become more apparent.
- In the meantime, I view the Standard Model as a necessary and appropriate
- but probably flawed synthesis. Thirty years of collecting data and
- fleshing out the theory have allowed us to construct one coherent explanation
- that accounts for many of the facts at hand. But it is probably only
- the first of several such steps which we will take on the way to
- a complete theory.
-
- This is getting too philophophical. Time to stop.
-
- -Scott
- --------------------
- Scott I. Chase "It is not a simple life to be a single cell,
- SICHASE@CSA2.LBL.GOV although I have no right to say so, having
- been a single cell so long ago myself that I
- have no memory at all of that stage of my
- life." - Lewis Thomas
-