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RandomFactor writes:

According to an article posted on a major news aggregator in 2015, Matter and Antimatter Are Mirror Images

As it turns out, maybe, but not so much inside

Physicists in the College of Arts and Sciences at Syracuse University have confirmed that matter and antimatter decay differently for elementary particles containing charmed quarks.

Distinguished Professor Sheldon Stone says the findings are a first, although matter-antimatter asymmetry has been observed before

[...]Using LHC data, they identified both versions of the particle, well into the tens of millions, and counted the number of times each particle decayed into new byproducts.

"The ratio of the two possible outcomes should have been identical for both sets of particles, but we found that the ratios differed by about a tenth of a percent," Stone says. "This proves that charmed matter and antimatter particles are not totally interchangeable."

Adds Polyakov, "Particles might look the same on the outside, but they behave differently on the inside. That is the puzzle of antimatter."

Matter and antimatter behaving differently is not a new concept and has been observed before in particles with strange quarks and with beauty quarks:

What makes this study unique, Stone concludes, is that it is the first time anyone has witnessed particles with charmed quarks being asymmetrical: "It's one for the history books."

A step closer, but still no where close to explaining the disparity between matter and antimatter.

Bearded Spock is laughing at us.

According to Wikipedia: CP violation:

In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge conjugation symmetry) and P-symmetry (parity symmetry). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle (C symmetry) while its spatial coordinates are inverted ("mirror" or P symmetry).

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