Smolić, Ivica (2010) Hawking radiation, W algebras and anomalies. Doctoral thesis, Faculty of Science > Department of Physics.

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Abstract
We have extended the analysis of the method used to calculate the bosonic and fermionic Hawking radiation spectrum via higher spin currents. We start by showing that the nearhorizon physics for a Kerr black hole is approximated by an effective twodimensional field theory of bosonic or fermionic fields. Then, using twodimensional currents of any spin that form a W_infinity algebra in the bosonic and W_1+infinity algebra in the fermionic case, we construct an infinite set of covariant currents, each of which carries the corresponding moment of the Hawking radiation. These are suficient for the reconstruction of the Hawking radiation spectrum, which agrees with the result obtained by other methods. More importantly, we show that the predictive power of this method is based not on the anomalies of the higherspin currents (which are trivial) but on the underlying W_infinity or W_1+infinity structure. Our results point toward the existence of a symmetry larger than the Virasoro algebra, generated by some of the W algebras, in the nearhorizon geometry.
Item Type:  Thesis (Doctoral thesis) 

Keywords:  black holes, Hawking radiation, anomalies, W algebras 
Supervisor:  Pallua, Silvio and Bonora, Loriano 
Date:  9 July 2010 
Number of Pages:  105 
Subjects:  NATURAL SCIENCES > Physics 
Divisions:  Faculty of Science > Department of Physics 
Depositing User:  Gordana Stubičan Ladešić 
Date Deposited:  24 Jul 2014 10:38 
Last Modified:  24 Jul 2014 10:38 
URI:  http://digre.pmf.unizg.hr/id/eprint/2535 
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