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- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!agate!agate!matt
- From: matt@physics2.berkeley.edu (Matt Austern)
- Newsgroups: sci.physics
- Subject: Re: No big crunch?
- Followup-To: sci.physics
- Date: 5 Nov 92 10:58:29
- Organization: Lawrence Berkeley Laboratory (Theoretical Physics Group)
- Lines: 33
- Distribution: world
- Message-ID: <MATT.92Nov5105829@physics2.berkeley.edu>
- References: <1992Nov4.134438.27968@sei.cmu.edu> <1d99kkINNqu7@agate.berkeley.edu>
- <1992Nov4.203930.20410@murdoch.acc.Virginia.EDU>
- <1d9lptINN94@agate.berkeley.edu> <5NOV199210450757@csa2.lbl.gov>
- Reply-To: matt@physics.berkeley.edu
- NNTP-Posting-Host: physics2.berkeley.edu
- In-reply-to: sichase@csa2.lbl.gov's message of 5 Nov 1992 10:45 PST
-
- In article <5NOV199210450757@csa2.lbl.gov> sichase@csa2.lbl.gov (SCOTT I CHASE) writes:
-
- > I think that it is far from "outrageous" to speculate that there are
- > vast amounts of "unknown", a.k.a. nonbaryonic matter in the
- > Universe. In fact, questions of abundance aside, I regard it as
- > likely that other forms of matter do exist. I think it would be
- > both presumptuous and a bit naive to think that at this early stage
- > in our understanding of the high-energy world that nothing
- > fundamentally new will show up.
-
- I agree with Scott, but just with one small caveat.
-
- I certainly think that we don't know all of the physics that's out
- there, and that it is likely that there are particles that we have
- neither discovered nor even predicted.
-
- However, nonbaryonic dark matter requires something more than that: it
- requires that there are *stable* particles that we haven't discovered
- yet. That's a much stronger statement; the last stable particle that
- was discovered was the neutrino, and we've known about that for fifty
- years. It's entirely conceivable that we really have discovered all
- of the stable particles that exist, that the more massive particles
- will just decay into the things we see around us.
-
- Of course, it's also conceivable that the opposite is true. Doing
- experiments to detect the more exotic forms of dark matter is
- certainly worthwhile.
-
- --
- Matthew Austern Just keep yelling until you attract a
- (510) 644-2618 crowd, then a constituency, a movement, a
- austern@lbl.bitnet faction, an army! If you don't have any
- matt@physics.berkeley.edu solutions, become a part of the problem!
-