Table 12-2 The quarks Weak Mass Baryon number Quark (q) Symbol Charge (e) isospin T; (MeV/c?) Spin (h) 1st generation 에3 336 и dn down 338 2nd generation charm 1,500 strange 540 3rd generation top 174,000 bottom 5,000 Table 12-5 Internal quantum numbers of the quarks Quark т B' и -1 -1 1 -1 Table 12-11 Quark composition of selected hadrons Baryons Quarks Mesons Quarks иud п ud п udd TT ud ЛО uds K+ us 4++ ко ds ийи Σ иus KO sd Σ0 uds su Σ dds J/p uss D+ cd dss D° си Ω. SSS Cs л* udc B+ ub иис B° аь Σ udc Bº db usc B ub
For this problem, you may use your notes and the tables provided only for parts a, b, and c.
a) For the given quark combination ( d , s̅ ) determine the baryon number, the strangeness, and the electric charge quantum number, Q’. Recall, a particle’s charge q is related to its electric charge quantum number Q’ by q = eQ’. [Note: we are using the symbol Q’ so as to prevent confusion with the Q-value of a nuclear decay.]
b) Using the tables provided, identify the hadron that corresponds to the above data. Estimate the
2 expected mass of the hadron in units of MeV/c^2
c) Determine the hypercharge, the z-component of the isospin, and the isospin for the hadron given in your answer to part b) above.
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