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Physics (AS & A Level) · Oct / Nov 2021 · Paper 13 · Question 40

9702Fundamental particles

Which combination of quarks could not be the quark composition of the hadron shown? p = proton n = neutron Σ– = sigma particle of charge –e Σ+ = sigma particle of charge +e u = up quark d = down quark s = strange quark

  1. AΣ– : dds
  2. BΣ+ : uds
  3. Cp : uud
  4. Dn : udd

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Correct answer: B. Σ+ : uds

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