What is Antimatter?

[davidmattis]

my thoughts on antimatter is that when u apply the concept of polarity then clarity will manifest. antimatter is a mirror. so what we perceived on our side of the coin appears reversed on the other side. on our side we are the mass and on the other side we are the space. on our side you see the sun and on the other side the sun is a black hole.

[CACBCCCU]

It would take me about 20 comments to explain why light bending toward mass does not necessarily equate to light bending away from negative mass. Suffice it to say that antimatter stars or galaxies either don't exist or can't be easily identified, and their light would ride with antimatter-attractive antiphased gravitons, and graviton receipts would reasonably tend to have equal but opposite trajectory-relations to graviton emits, bit like mutual heating on facing sides of two nearby hot coals.

[CACBCCCU]

I should add to what I just wrote that it also seems to me that inertial mass = E/c^2 is always positive regardless of whether gravitational mass is positive or negative.

[CACBCCCU]

Seems to me positrons must have positive energy, so for E= -mc^2 to hold they must have negative mass. Hopefully all antimatter is like that too, as it would keep things simple.

[MrKra7as]

what the hell is he talking bout dude. fucking nerd needs to take some shots and live it up

[joexer1]

@MrKra7as Wtf is wrong with you? He is a teacher, but i dont think you have ever seen one of those in whatever poverty you live in

[flipnotevideos64]

looks like highs school

[CACBCCCU]

Supposing all positive charge is antimatter-based, the Dirac picture for electrons and positrons is simple, they may have opposite gravitational charges, but the proton's Monte Carlo cross-section, at sufficient resolution energy, could become much like a core of antimatter surrounded by matter, same thing with its two positively charged component quarks. This seems to explain why tevatron's top/antitop pairs unusually tend to head off in the direction of the proton beam.

[heartlessvietboy]

Anti-matter is bull crap. Who did the other Professor get it from? The other Professor. Who did that Professor get it from. The other Professor. Who did that Professor get it from. The other professor. Where did it all come from?? Balogny!!

[CACBCCCU]

@heartlessvietboy Sorry to hear that. I guess you don't think congress should consider making the discovery of antimatter the basis for a new system of numbering years: 1932 = new year 0, either. Anyway, seems to me sign difference in gravitational charge between electrons and positrons could explain why cosmic ray energy above some threshold tends to concentrate into a 2-d form: electron- and positron-coupled parts of cosmic ray energy are seemingly oppositely deflected by intervening gravity.

[CACBCCCU]

@heartlessvietboy "Who did the other Professor get it from?"

Thank you for implying (I guess wildly) that I'm a Professor, but I'm not a Professor, I do not teach students. The notably pointless scrawlings are mostly self-taught, I'm an EE. 

[CACBCCCU]

Seems there's a difference between describing the Dirac sea as being 1: full of "virtual electron-positron pairs" as some do, or as 2: full of electrons in "negative" energy states.

1 implies both particles are below SL and can be promoted out of virtuality.

2 implies the positron is a round "hole" that ends below sea level (SL) and it's paired with a fitting electron "bump" above SL.

2 seems nucleo-centric compared to 1. I guess each has its niche.

[CACBCCCU]

Theoretically, an anti-electron behaves like an electron going backward in time, which means the electron's life-long energy bookkeeping appears to be negative, its creation becomes its annihilation vice-versa. A time-reversed electron's negative charge is reversed, so it behaves like it has a positive charge. Same with the spin. If electrons are theoretically attracted to neutron stars, antielectrons are theoretically repelled. Of course no-one seems to want to agree on that, carpe diem & YMMV.

[CACBCCCU]

A hypothetical supermassive antimatter cosmological object would form a gravity peak, not a gravity well. Light from matter would tend to avoid it from the start, but the gravity peak would look like a gravity well to other hypothetical supermassive antimatter objects, all matter-repulsive. Still, at the nuclear scale (at least), maybe all positive particles are antiparticle-dominated and the distinction between matter/antimatter and particle/antiparticle is a bit like a shaggy carpet.

[TheDrewTimes2]

What does he mean by the "hole" or the vacuum he talks about? sorry if this is an obvious answer I'm in Jr. High, and my science teacher can't tell me how antimatter works :)

[CACBCCCU]

I've wondered why the negative energy sea almost always seems filled up just right, no obvious spillout, maybe any excess just spreads out to its edges, maybe antigravitationaly, depending on where those edges might be. It takes a bit of of a kick to make it splash and create a positron bubble in the sea, more kick and antibaryons arise. From this perspective it seems odd to expect much antimatter in most places, the splashing and bubbles seem to have settled down except in a few active areas.

[CACBCCCU]

A few notes before I move on:

Last sentence two posts below summarizes my current thinking on time reversal, I think it is consistent with Feynman's position. The post before that is not entirely consistent, as it doesn't treat time reversal as superfluous, also, gravity's left out.

Fwiw, seems QG differs from GR at small scales due to antimatter and a particle side of gravitons and it differs at large scales due to antimatter and the wave side of gravitons.

sp "accommodation"

[CACBCCCU]

Nice thought-provoking video, by the way. My main interest is quantum gravity, but I don't think QG is needed to explain the so-called "arrow of time," plain old G, or GR, will do. QG is basically all about gravitons and thus is somewhat antithetical to GR at both extremes of the size/energy scale. Taking all gravity as gravitons, and giving every graviton a balanced wave property leads to an accomodation of antimatter as being a source of gravitons 180 degrees out of phase from normal gravity.

[CACBCCCU]

I've considered that maybe positive-charged quarks are mostly antimatter and vice-versa, seems it could tie in with inertia, maybe by a tendency to maintain internal time loops*, and with holographic notions of quantum gravity.

*Seems antimatter's electrostatic (C) reversal and parity (P) reversal both arise out of time (T) reversal alone, and it seems antimatter also has gravity (G) reversal. So it also seems that if C, P and G reversal are already assumed, T reversal becomes superfluous.

[CACBCCCU]

The way I see it, time-reversed (T^-1) behavior of matter equates to gravitational repulsion of matter, and I suppose antimatter would be like matter except that it has mirror-reversed CPT symmetry (C^-1 P^-1 T^-1) compared to matter, so not only are the charge and spin reversed, is it also gravitationally repulsed. Seems the repulsion doesn't necessarily indicate anti-inertial behavior, however, and maybe that's why news articles may say things like "New Heaviest Form of Antimatter Discovered."

[CACBCCCU]

When trying to make the case for antimatter behaving antigravitationally, it seems looking at it from a time-reversal mirror-symmetry standpoint can be useful, an acceleration towards a gravity source becomes a deceleration away from it, and the idea of linking time's direction to matter and gravity in this way seems to be a nice plus of a concept to consider whenever listening to someone discussing the so-called "arrow of time"

[CACBCCCU]

Seems a neutron-sized bubble in a neutron star would be, in effect, like a particle that is halfway to being an antineutron. Since the bubble would rise, seems antimatter should rise twise as fast, if it could ever manage to avoid annihilation. Also, cosmic ray beams over 1Tev seem to have their energy stretched into flat sheets, and at 1Tev the rays have modes involving electrons and positrons. Opposite lensing of the beam's matter and antimatter parts seems to me to explain the linear stretch.

[BuguxLT]

It would be so awesome if this guy would be my physics teacher :)

[HorridFroth]

thatsthebleech is Patrick Hillan, a stalking, shit talking cocksucker. He's incapable of talking anything but nonsense.

V

V

[thatsthebleech]

Wow man negitive energy could be bad for you.

and cause bad carma.

Bad carma could give you cancer as it throws you back through time.

you would have flash backs man and it could be a bad trip.

In fact cancer causeing agents could be addictive or cause recessive traits.

And i could use sugar maybe to cause diabetes or advance corrupted men.

so you should stay around positive people that create interest.

exercise the devil.

[isurujin]

@thatsthebleech it's spelled karma and exorcise...

[mypokemonisawesome]

Do they teach this in collage?

[lazomaniac]

magic

[MEareCAT]

Wow, another way to make learning about the Universe boring. LOL @ all the pseudo intellectual asses on here trying to make themselves look clever ::

[zenithomega19]

@MEareCAT Thanks for the feedback, Jethro.

Now go back to shoveling manure for a living.

[Einstien1879]

our parents called our present leaders as lemons... we need physicists to be our leaders - we call them anti-lemons.. :> )

[earthtojanson]

wow, never thought so deep with a square root. brilliant

[EPICGUYDUDE]

what about anti(element name)? it is WOULD be made of antiprotons, positrons, and antineutrons. Right?

[Ypipable]

Kick it.

[samgee2007]

what is square root?.......

[yerrafagggot]

@samgee2007 a root with a shape of a square =p

[sim5191]

anti-watermelon. rly splatting!

[prepare2fire]

I like this guy =D

[EveryEndIsANewStart8]

smart kid

[SuperMagnetizer]

Positrons and electron trajectories are curved by magnetic fields, because each "particle" is made of pure magnetism, IMHO.

[ClouDLiveZ]

brilliant now i know how my ipod charges up

[MrRedeyedJedi]

I feel myself underatanding then becomming slightly confused at some theory's... how complicated lol

[DarkStar1O9]

lol u physicists

[broeskoenen]

this isnt the real antimatter..... this is a reaction of.... what is it where is it....

whats the connection.....

[JZacharyFenner]

Thank you. Eloquent and fun. Great teacher.

[jellyfishfish96]

talk english!

[mmmcake44]

Interesting stuff, Pretty good teacher

[FarFromEquilibrium]

Navigating the Dirac Sea :D