English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We obtain the closed-form absorption probabilities for minimally-coupledmassless scalars propagating in the background of D=5 single-charge and D=4two-charge black holes. These are the only two examples of extremal black holeswith non-vanishing absorption probabilities that can be solved in closed formfor arbitrary incident frequencies. In both cases, the absorption probabilityvanishes when the frequency is below a certain threshold, and we discuss theconnection between this phenomenon and the behaviour of geodesics in theseblack hole backgrounds. We also obtain leading-order absorption cross-sectionsfor generic extremal p-branes, and show that the expression for thecross-section as a function of frequency coincides with the leading-orderdependence of the entropy on the temperature in the corresponding near-extremalp-branes.Comment: Latex (3 times), 20 page

Closed-form absorption probability of certain D = 5 and D = 4 black holes and leading-order cross-section of generic extremal p-branes