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Classical gravitati...
Classical gravitational observables from the Eikonal operator
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- Di Vecchia, Paolo (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.;Stockholm Univ, KTH Royal Inst Technol, NORDITA, Hannes Alfvens vag 12, S-11419 Stockholm, Sweden.,Nordiska institutet för teoretisk fysik (Nordita),The Niels Bohr Institute, Denmark
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- Heissenberg, Carlo, 1992- (författare)
- Uppsala universitet,Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Uppsala University, Sweden,Nordita SU; Stockholm Univ, Hannes Alfvens vag 12, S-11419 Stockholm, Sweden.;Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.,Institutionen för fysik och astronomi,Stockholm Univ, KTH Royal Inst Technol, NORDITA, Hannes Alfvens vag 12, S-11419 Stockholm, Sweden.
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- Russo, Rodolfo (författare)
- Queen Mary Univ London, Mile End Rd, London E1 4NS, England.
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- Veneziano, Gabriele (författare)
- CERN, Theory Dept, CH-1211 Geneva 23, Switzerland.;Coll France, 11 Pl M Berthelot, F-75005 Paris, France.
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 843
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observables. In the first proposal, only genuinely propagating gravitons are included, while, in the second, zero-frequency modes are added in order to recover the effects of a static gravitational field. We first calculate the radiated energy momentum and the change in each particle's momentum, or impulse, to 3PM order finding agreement with the literature. We then calculate the angular momentum of the gravitational field after the collision. In order to do so, we adapt the method of reverse unitarity to the presence of derivatives in the operators describing the angular momentum and reproduce the result of [1] obtained by resumming the small-velocity expansion. As a new application, we derive also the variation in each particle's angular momentum up to 3PM: calculating separately field and particle contributions allows us to check the balance laws explicitly. We also show how the eikonal operator encodes the linear-response formula of Bini-Damour by deriving the linear radiation-reaction contribution to the transverse impulse at 4PM.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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