Homework Answers
(a) An antibaryon with charge +2 does not exist.
An antibaryon has Baryon number ( B ) = -1.
Since, Hypercharge ( Y ) = Strangeness ( S ) + Baryon Number ( B )
Therfore, for given condition Y = S - 1.
The formula for elementary charge ( Q ) = Isospin ( T3 ) + Half of Hypercharge ( Y/2 )
The baryon particles are neutron, proton, lambda, sigma, xi and omega.
In Antibaryon particles only the baryon number will change from +1 to -1 and the remaining number will be same
they are.
Therefore, for the six antibaryon particles we will calculate hypercharge beacuse baryon number has changed.
After calculating hypernumber, we will calculate elementary charge because isospin is same as before.
After doing all this calculation, we will find that any antibaryon paticle has +2 charge.
(b) A positive meson with strangeness +1 exist.
The K-meson particle exist in doublet of K+ and K-. K+ mesons also are of two types K+1 and K+0. Both kind of
mesons have strangeness of +1.
(c) A spin-0 baryon exist.
The baryon particles are further divided into two categories: (1) Nucleons and (2) Hyperons.
In Nucleons we have baryon number zero and hyperons have baryon number 1.
Hyperons are of 4 types: lambda, sigma, xi and omega.
Lambda and Omega hyperons have spin-0.
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