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uniqueuponhim
2005-Feb-03, 04:29 PM
A very long time ago (about 5 years ago now, I guess,) I saw a documentary on the theory of mirror matter. I can't remember a whole lot about it, but what I do remember is that it talked a lot about the Tunguska event. From what I remember, it also, like so many other bad astronomy programs, did not talk much about any competing theories, and sort of made it seem like it was the only explanation for what happened, and that mirror matter must exist. This, of course, seemed fishy to me, but I eventually forgot about it. I just remembered it recently, though, and decided to ask about it on here. So, is there anything wrong with this mirror matter theory, and if so, what? And what other possible explanations are there for the Tunguska event?

TravisM
2005-Feb-03, 05:04 PM
It was a loose meteor (i never know where to use which word, meteor? meteorite? :cry: ) It exploded just before impact, knocking down the trees. Other theories conclude that it was a comet, but it is unlikely to have caused the devistaion...

Bad jcsd
2005-Feb-03, 05:27 PM
You probably mean antimatter, which most defintely doese xist thoguh as an explanttion for Tunguska seems rather unliekly and outlandish.

uniqueuponhim
2005-Feb-03, 05:47 PM
No, I do not mean antimatter, I know very well what antimatter is, and I am fully aware that it exists. I am talking about mirror matter, something which is completely different.

Argos
2005-Feb-03, 06:19 PM
I couldnīt find significant scientific references to MM. This (http://www.geocities.com/mirrorplanets/) is what Google returns as first result, suggesting there be little academic involvement on the subject.

Bad jcsd
2005-Feb-03, 08:06 PM
No, I do not mean antimatter, I know very well what antimatter is, and I am fully aware that it exists. I am talking about mirror matter, something which is completely different.

'Mirror' implies parity symmetry to me which implies antimatter.

Actually what it seems is that some people are claiming that physics as opposed to being only CPT symmetric, is P symmetric leading to the existance of weakly ineracting mirror matter which is the parity reverse of normal matter. As it is almost unievresally accepted that P symmetry is a broken symmetry this idea is ceratinly not mainstream.

sidmel
2005-Feb-04, 03:00 PM
I decided to try the new 'more accureate' Microsoft search engine and did come up with something:


This is thus similar to anti-matter, the main difference is that mirror particles and ordinary particles only have very weak interactions, otherwise they would have been detected already.

Mirror particles could thus act as dark matter. Because mirror matter has similar properties as ordinary matter, you could have mirror stars, galaxies, planets etc. Note that mirror stars would be invisible because they would emit mirror photons, which don't interact with ordinary electrons (to be precise there could be a very weak interaction, see below).

http://people.zeelandnet.nl/smitra/

I've ran across a few other outdated links and some very very brief refences, but I only spent about 5 - 10 minutes searching.

uniqueuponhim
2005-Feb-04, 04:08 PM
That's the thing. I've found websites that are more than happy to give information on the theory, but I wouldn't exactly consider any of them to be reliable sources. That's why I was asking on here.

TravisM
2005-Feb-04, 05:07 PM
Well, it would have to mirror all 50-some-odd existing sub atomic particles including all their already 'mirrored' antimatter cousins...
Sounds a little strange already. It is an extra symmetry though, which might make the string theorists happy...

Saibal Mitra
2006-Mar-12, 12:06 AM
That's the thing. I've found websites that are more than happy to give information on the theory, but I wouldn't exactly consider any of them to be reliable sources. That's why I was asking on here.

I have listed almost all of the articles that can be found on the web here:

http://people.zeelandnet.nl/smitra/mirror.htm

Most are published in peer reviewed journals. Some of the older articles are missing, but I'll try to put them in this list too. E.g. the original article by Lee and Yang is available in the website of Physical Review, but you need to have a subscription to download the entire paper.

There is also a page on wikipedia:

http://en.wikipedia.org/wiki/Mirror_matter


Both the wikipedia article and my webpage deal only with ''unbroken'' mirror symmetry. In this case the masses of the mirror and ordinary particles are exactly the same. Mirror symmetry can be spontaneously broken. This depends on the form of the Higgs potential, see here for details:

http://arxiv.org/abs/hep-ph/0006027

See here for an article on dark matter in the form of ''broken'' mirror matter:

http://arxiv.org/abs/hep-ph/0111381

pranab
2006-Mar-24, 01:37 PM
Doesthis mirror particles will interact with ordinary matter as antiparticles interacts with particles and will turn up in flash &radiation?.These mirror partcles did create another universe -the mirror universe and in one of these mirror planets any mirror human does exist?
Dr. Pranab Kr Bhattacharya