TY - JOUR
T1 - The delocalized effective degrees of freedom of a black hole at low frequencies
AU - Kol, Barak
PY - 2008/12
Y1 - 2008/12
N2 - Identifying the fundamental degrees of freedom of a black hole poses a long-standing puzzle. Recently Goldberger and Rothstein forwarded a theory of the low frequency degrees of freedom within the effective field theory approach, where they are relevancy-ordered but of unclear physical origin. Here these degrees of freedom are identified with near-horizon but non-compact gravitational perturbations which are decomposed into delocalized multipoles. Their world-line (kinetic) action is determined within the classical effective field theory (CLEFT) approach and their interactions are discussed. The case of the long-wavelength scattering of a scalar wave off a Schwarzschild black hole is treated in some detail, interpreting within the CLEFT approach the equality of the leading absorption cross section with the horizon area.
AB - Identifying the fundamental degrees of freedom of a black hole poses a long-standing puzzle. Recently Goldberger and Rothstein forwarded a theory of the low frequency degrees of freedom within the effective field theory approach, where they are relevancy-ordered but of unclear physical origin. Here these degrees of freedom are identified with near-horizon but non-compact gravitational perturbations which are decomposed into delocalized multipoles. Their world-line (kinetic) action is determined within the classical effective field theory (CLEFT) approach and their interactions are discussed. The case of the long-wavelength scattering of a scalar wave off a Schwarzschild black hole is treated in some detail, interpreting within the CLEFT approach the equality of the leading absorption cross section with the horizon area.
KW - Black holes
KW - Effective field theory
UR - http://www.scopus.com/inward/record.url?scp=62649172596&partnerID=8YFLogxK
U2 - 10.1142/s0218271808014151
DO - 10.1142/s0218271808014151
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AN - SCOPUS:62649172596
SN - 0218-2718
VL - 17
SP - 2617
EP - 2624
JO - International Journal of Modern Physics D
JF - International Journal of Modern Physics D
IS - 13-14
ER -