A baryon always had three quarks. If it hasn't, then it is not a baryon.
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A baryon acoustic oscillation is one of the regular periodic fluctuations in the density of the visible baryonic matter of the universe.
An antiboson is an antiparticle of a boson.
What makes you think that it should decay precisely into an electron and a positron, rather than some other option?Anyway, in any such particle conversion, certain quantities must be conserved. Some of these conservation laws are strict (no exceptions are known to exist), some not (now and then there is an exception). For the proposed reaction, you should consider the following conservation laws:Conservation of mass/energy - the electron and the positron have much less mass than the neutron. This would not pose a significant problem, since they could move away from each other at a high speed - the missing mass/energy would be present in the form of kinetic energy. This indeed happens in some particle reactions.Conservation of momentu - no problem here, either.Conservation of electric charge - no problem here.Conservation of baryon number - this would NOT be conserved in your proposed reaction. Please note that this is not a strict conservation law; there are known violations. However, violating the baryon number in a particle conversion is quite uncommon. In this case, the neutron has a baryon number of +1, the proton (one of the decay products of the actual decay) also has a baryon number of +1, while electron + positron would have a baryon number of 0.
A baryon always had three quarks. If it hasn't, then it is not a baryon.
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It is -1 as it the opposite of the baryon number of a proton.
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Baryon
A baryon number is a quantum number related to the difference between the numbers of quarks and antiquarks in a system of subatomic particles.
A baryon acoustic oscillation is one of the regular periodic fluctuations in the density of the visible baryonic matter of the universe.
A baryon is a variety of heavy subatomic particle created by the binding of quarks by gluons.
K-meson
A xi baryon is a subatomic hadron particle comprising three quarks, one up or down quark, and two heavier quarks.
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