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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

The decay of one type of K−meson is cited as evidence that nature favors matter over antimatter. Since mesons are composed of a quark and an antiquark, is it surprising that they would preferentially decay to one type over another? Is this an asymmetry in nature? Is the predominance of matter over antimatter an asymmetry?

To determine

Whether it is surprising that K-meson would preferentially decay to one type over another or not. Whether this is asymmetry in nature or not. Also, state whether the predominance of matter over antimatter is an asymmetry or not.

Explanation

Charged mesons decay into electrons and neutrinos while uncharged mesons decay to photons. Thus it is not surprising that K-mesons would preferentially decay to one type over another. Yes, this is an asymmetry as the couplings have equal and opposite values for deterministic characteristics of particles like spin and color...

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