Calculational problem in Peskin/Schroeder QFT

From: Rene Meyer (meyr2_at_web.de)
Date: 08/26/04


Date: Thu, 26 Aug 2004 09:30:54 +0000 (UTC)

Hi,

can anyone help me with the last step in Eq. 3.49 of P&S QFT? How does
the \sqrt{E \pm p^3} come in play here?

Rene.


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