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Title: Radiated Angular Momentum and Dissipative Effects in Classical Scattering

Journal Article · · Physical Review Letters

We present a new formula for the angular momentum Jμν carried away by gravitational radiation in classical scattering. This formula, combined with the known expression for the radiated linear momentum Pμ, completes the set of radiated Poincaré charges due to scattering. We parametrize Pμ and Jμν by nonperturbative form factors and derive exact relations using the Poincaré algebra. There is a contribution to Jμν due to static (zero-frequency) modes, which can be derived from Weinberg’s soft theorem. Using tools from scattering amplitudes and effective field theory, we calculate the radiated Jμν due to the scattering of two spinless particles to third order in Newton’s constant G, but to all orders in velocity. Our form-factor analysis elucidates a novel relation found by Bini, Damour, and Geralico between energy and angular momentum loss at O(G3). Our new results have several nontrivial implications for binary scattering at O(G4). We give a procedure to bootstrap an effective radiation reaction force from the loss of Poincaré charges due to scattering.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0009919
OSTI ID:
1886697
Alternate ID(s):
OSTI ID: 1980321
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 129 Journal Issue: 12; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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