Recent content by j1221

Yes!

Thank you very much HallsofIvy. I did the same thing to check this equation. But I do not know how to DERIVE it. Do you have any ideas? Thanks!

Hello the_epi, Thanks for your help. But I checked the website and check the Derivative part, I still do not understand how the Derivative related to the formula above. Could you please explain? Thanks a lot.

Hello HallsofIvy, Thank you very much for pointing out my mistake. I typed the wrong formula. I have corrected it. Would you please check it out again? Thank you again.

Hi everyone, Homework Statement My problem is just to derive a simple formula, which is http://www.texify.com/img/%5Cnormalsize%5C%21%28-1%29%5E%7Br%28r%2B1%29/2%7D%20%3D%5Csqrt%7B2%7D%20%5Cmbox%7Bcos%7D%20%5Cfrac%7B%5Cpi%7D%7B4%7D%282r%2B1%29.gif Here r is a positive integer. The Attempt...

Hello everyone, I was learning about the topic "chiral symmetry breaking" recently and got couple questions. I try to describe my understandings below, then list the questions: From the QCD Lagrangian level (quark level), I can understand the exact chiral symmetry exists when we take...