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How do we know a force is strong,week or intermediate by considering the corresponding Lagrangian.It seem that the intensiveness depends on both coupling constant,the form of theory(form of Lagrangian).By the way, the mass of force carrier boson stipulates the range of the force. The greater mass the shorter distance of interaction.But there is an unclear for me,because the mass changes when we change transfer momentum as we know in renormalization group theory.

Thank you very much in advance.

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# How do we know which is strong,weak force with considering Lagrangian?

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