- #1

- 65

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- Homework Statement
- Deduction of formula for Lagrangian density for a classical relativistic field

- Relevant Equations
- See the attached file

Hi,

I am reading Robert D Klauber's book "Student Friendly Quantum Field Theory" volume 1 "Basic...". On page 48, bottom line, there is a formula for the classical Lagrangian density for a free (no forces), real, scalar, relativistic field, see the attached file.

I like to understand formulas which are new to me, so I have searched internet for the deduction of that formula, without success.

I would be grateful for info where I can find such a deduction. It feels necessary to see it before I go on reading Klauber's book.

Thank you in advance, as we say here in Sweden!

Best regards,

Sten Edebäck

I am reading Robert D Klauber's book "Student Friendly Quantum Field Theory" volume 1 "Basic...". On page 48, bottom line, there is a formula for the classical Lagrangian density for a free (no forces), real, scalar, relativistic field, see the attached file.

I like to understand formulas which are new to me, so I have searched internet for the deduction of that formula, without success.

I would be grateful for info where I can find such a deduction. It feels necessary to see it before I go on reading Klauber's book.

Thank you in advance, as we say here in Sweden!

Best regards,

Sten Edebäck