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/sci/ - Science & Math

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2790465 No.2790465 [Reply] [Original]

what does /sci/ think about antimatter?

>> No.2790471
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2790471

i think hes a pretty cool guy and doesnt afraid of anything

>> No.2790469

Is it just...opposite electrical charges assigned to all of the constituent particles?

>> No.2790480

Antimatter appears less stable than what we commonly refer to as matter, thankfully we're made of the 'good stuff'.

>> No.2790488

>>2790480
Probably less stable because it would have to come into contact with matter. If we were in an "antimatter" universe I'd guess it would be stable [?].

>> No.2790492

Where is it?

>> No.2790498
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2790498

I heard that anti-matter particles move through time backwards

>> No.2790504

>>2790488

Apparently CERN lost their antihydrogen after an incredibly small peroid of time, in spite of the near perfect vaccum it was generated in.

>> No.2790505

>>2790480
there is antimatter that's completely stable, the same way that there is normal matter that isn't stable

>> No.2790511

>>2790505
uh has this actually been proven?

also .. if so, doesn't that postulate things regarding proton decay? does the anti-proton decay?

>> No.2790514

>>2790504
Nigger sure do get everywhere

>> No.2790525

I was replying to a comment which was made in response to my own?

I figured I dont need to tripfag just to post a fucking reply.

>> No.2790526

>>2790504
>near perfect vaccum
theres your problem

>> No.2790542

>>2790526
well how the fuck do you plan on building a perfect vacuum?

>> No.2790554

Whats the deal with proton decay anyways, it a viable theory? I find the ideo that matter on the scale we see will cease to exist some day interesting.

>> No.2790555

>>2790498
when doing Feynman diagrams you can say that, its just a result of the conservation of electron number; electron has an electron number of 1 and positron of -1. so during a reaction you need the same electron number before and after, by twisting the electron to go back in time you can change the +1 in the products to a -1 in the reactant.

tl;dr - its just notation

>> No.2790552

couldn't virtual particles fuck up a vacuum?

>> No.2790559

>>2790542
follow the schematics on dyson.com? I'm not an electritcian but i guess you could take apart one at your house

>> No.2790562
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2790562

>>2790552
One already exists.

>> No.2790566

>>2790559
>>2790562
Fuck year, Dyson bro's. Top tier vacuum owner reporting.

>> No.2790571
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2790571

>PRIME MATTER

>> No.2790573

>>2790542
take near perfect vacuum, but in strong electromagnetic field
ionize the shit out of it for days

>> No.2790579

>>2790542

Get as close as possible, start to fill it with anti particles. Eventually the remaining matter is eliminated. Nothing left but energy. Then proceed to continue adding anti parts.

>> No.2790614

>>2790579
that's actually a good one

>> No.2790647

bump

>> No.2790689

Basis of the antihydrogen experiment for those who are interested.

http://athena-positrons.web.cern.ch/ATHENA-positrons/ATHENA-Reading-Room/articles/ATHENA/Pri99ATH.pd
f

>> No.2790699

Where does antimatter exist naturally in the universe?

>> No.2790704

>>2790699
http://www.bbc.co.uk/news/science-environment-12158718

>> No.2790714

it's just charge reversed matter with an unfortunate name that attracts a bunch of idiots.

>> No.2790733
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2790733

>When gamma rays pass near the nuclei of atoms, they can turn their energy into two particles: an electron-positron pair.

That shit's crazy man.

>> No.2791077

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

>> No.2791093

Bananas create a positron roughly every 75 min

>> No.2791100

I find it more fascinating the almost all the behavior is perfectly described as a normal matter particle MOVING BACKWARDS IN TIME DUN DUN DUN

>> No.2791120

that is the most random factoid ever>>2791093

>> No.2791126

Guys

guys

listen

What if WE'RE the antimatter and THEY'RE the normal matter

>> No.2791127

http://en.wikipedia.org/wiki/Flatlander_(story)

>> No.2791128

>>2791093
I was under the impression it was every 1.5 hours

>> No.2791131

not possible, god created the universe around us

>> No.2791179

>>2791128
it's 1.25 hours bruh, just a head's up

>> No.2791189

>>2791131
Suppose what your faith has said is essentially correct. Suppose that there is a universal mind controling everything, a god willing the behaviour of every sub-atomic particle. Now every partical has an anti-partical, its mirror image, its negative side. Maybe this universal mind resides in the mirror image, instead of being in our universe as we wanted to believe. Maybe he's anti-god, bringing darkness instead of light."

>> No.2791206

>>2791126
>>2791126
>>2791126
>>2791126
oh fuck...

>> No.2791210
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2791210

>>2791126
my god

>> No.2791219
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2791219

>>2790488

U jelly of my antimatter universe?

>> No.2791235

http://www.sciencedaily.com/releases/2008/01/080112160830.htm

Milky Way Has Mysterious Lopsided Cloud Of Antimatter: Clue To Origin Of Antimatter

ScienceDaily (Jan. 14, 2008) — The shape of the mysterious cloud of antimatter in the central regions of the Milky Way has been revealed by ESA’s orbiting gamma-ray observatory Integral. The unexpectedly lopsided shape is a new clue to the origin of the antimatter.

>> No.2791257

did anyone see this paper appear on arXiv today: http://arxiv.org/abs/1103.4937 ?

Is it a crackpot paper? The guy seems to be claiming antimatter exhibits anti-gravity, but that seems just plain wrong to me, if GR is correct. The stress energy tensor of antimatter behaves just like that for matter doesn't it? I'm thinking of a complex scalar field, for example.

>> No.2791273

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

We're doomed.

>> No.2791282

>>2791257
I'd say it's a crackpot paper, but technically, I don't think we've observed. On a similar note, we cannot prove gravity for quantum particles because we have no way to test gravity at the small scale due to how weak it is compared to the uncertainty barrier. Similarly, we have never verified gravity below like 2cm of distance (If I recall correctly), they've tested it with torsion balances.

>> No.2791300

>>2791282

cool. from a very quick look at the paper it looks like he's saying that dark energy might be explained by anti-gravity from anti-matter, which I'd imagine is a very macroscopic effect, that's why I thought it sounded crackpotty.

>> No.2791315

A gram of antimatter could fuel a spaceship to alpha centauri, no problem. We need to work on that shit.

>> No.2791329

I suspect the lack of natural antimatter is because of some undiscovered property of antimatter. I also suspect it has something to do with time and entropy. Entropy is the only process that breaks time symmetry, so if antimatter is traveling backwards in time, it would become more ordered over time, not less. Maybe all the antimatter is in one location, in some highly ordered state.

>> No.2791333

>>2790465
I think the Durac equation is pretty nifty.