منابع مشابه
Two observers calculate the trace anomaly
We adapt a calculation due to Massacand and Schmid to the coordinate independent definition of time and vacuum given by Capri and Roy in order to compute the trace anomaly for a massless scalar field in a curved spacetime in 1+1 dimensions. The computation which requires only a simple regulator and normal ordering yields the well-known result R 24π in a straightforward manner. 03.70 Typeset usi...
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We examine the contribution ofW boson loops to the amplitude of the process H −→ γγ within the dispersion relation approach, taking up an issue raised in this context recently. We show that the non-vanishing limit of the relevant formfactor for mW → 0 is due to a finite subtraction induced by the value of the corresponding trace anomaly. The argument can be turned around and one thus arrives at...
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Conformal scalar fields coupled to the dilaton appear naturally in two-dimensional models of black hole evaporation. We show that their trace anomaly is (1/24π)[R− 6(∇φ)2 − 22φ]. It follows that the RST counterterm appears naturally in the one-loop effective action. [email protected] [email protected]
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 1996
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/13/2/006