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Xuekai Du
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π- + p→Λ + K0
Why is this a strong interaction instead of weak? Since the quark content changed.
Why is this a strong interaction instead of weak? Since the quark content changed.
Xuekai Du said:Since the quark content changed.
1) It is pure hadronic interaction, and 2) strangeness is conserved: Strangeness-conserving hadronic interactions can not be weak.Xuekai Du said:π- + p→Λ + K0
Why is this a strong interaction instead of weak? Since the quark content changed.
This isn't a general rule. Hadronic-only strangeness-changing processes must be weak, but hadronic-only strangeness-conserving processes needn't be strong. The example in the original post can proceed via strong, weak, or electromagnetic diagrams (albeit that does mean it would be called "strong" since that diagram will dominate). The decay ##B_s^0 \rightarrow D_s^{^-} \pi^+## conserves strangeness but proceeds only weakly since bottomness and charmness are changed.samalkhaiat said:Strangeness-conserving hadronic interactions can not be weak.
My statement was about light hadrons, i.e., flavour [itex]SU(3)[/itex]. Of course, if you include heavy quarks, then you can have weak decays in which the s-quark behaves as spectator giving [itex]| \Delta S | = 0[/itex].Envelope said:This isn't a general rule. Hadronic-only strangeness-changing processes must be weak, but hadronic-only strangeness-conserving processes needn't be strong. The example in the original post can proceed via strong, weak, or electromagnetic diagrams (albeit that does mean it would be called "strong" since that diagram will dominate). The decay ##B_s^0 \rightarrow D_s^{^-} \pi^+## conserves strangeness but proceeds only weakly since bottomness and charmness are changed.
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