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approximation of squared mass of scalar field

 
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May22-12, 02:14 PM   #1
 

approximation of squared mass of scalar field


why the squared mass of a scalar field is approximated by: m^2=d^2V/d\phi^2\approx \rho_\phi/\phi^2 _______ ρ/φ^2 ??
 
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