Recent content by songwmailvy

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    Graduate How is Born Cross Section Related to Observed Cross Section?

    Hi everyone? What is Born cross section? And what is the relation between it and observed cross section? Thank you.
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    Graduate Classifying Quarks: Understanding Mesons, Baryons, and Quark Families

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    Graduate Classifying Quarks: Understanding Mesons, Baryons, and Quark Families

    when want to illustrate messon and bayyons , we put u,d,s together; but when talk about family we put u,d together and c,s together. why? I am really confused!
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    Graduate What Are the 8 Gluons and Their Role in Subatomic Physics?

    what are they?