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The eikonal operato...
The eikonal operator at arbitrary velocities I : The soft-radiation limit
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- Di Vecchia, Paolo (author)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.;KTH Royal Inst Technol, NORDITA, Hannes Alfvensvag 12, SE-11419 Stockholm, Sweden.;Stockholm Univ, Hannes Alfvensvag 12, SE-11419 Stockholm, Sweden.,Nordiska institutet för teoretisk fysik (Nordita),The Niels Bohr Institute, Denmark
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- Heissenberg, Carlo (author)
- Uppsala universitet,Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Uppsala University, Sweden,Stockholm Univ, Hannes Alfvensvag 12, SE-11419 Stockholm, Sweden.;Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.;Nordita SU,Teoretisk fysik,KTH Royal Inst Technol, NORDITA, Hannes Alfvensvag 12, SE-11419 Stockholm, Sweden.;Stockholm Univ, Hannes Alfvensvag 12, SE-11419 Stockholm, Sweden.
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- Russo, Rodolfo (author)
- Queen Mary Univ London, Dept Phys & Astron, Ctr Theoret Phys, Mile End Rd, London E1 4NS, England.
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- Veneziano, Gabriele (author)
- 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)
- Springer Nature, 2022
- 2022
- English.
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In: Journal of High Energy Physics (JHEP). - : Springer Nature. - 1126-6708 .- 1029-8479. ; :7
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Abstract
Subject headings
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- Observables related to the real part of the gravitational eikonal, such as the deflection angle and time delay, have been found so far to have a smooth post-Minkowskian (PM) expansion whose validity extends from the non-relativistic to the most extreme ultra-relativistic (UR) regime, which smoothly connects with massless particle collisions. To describe gravitational radiation, the eikonal phase has to be promoted to a unitary operator for which we motivate a proposal and start discussing properties in the soft-radiation limit. A convergent PM expansion is found to only hold below an UR bound (discussed in the GR literature in the seventies) above which a different expansion is instead needed implying, in general, some non-analyticity in Newton's constant. In this extreme UR regime soft radiative observables receive contributions only from gravitons and are therefore universal. This generalises the pattern discussed in [1] beyond the elastic case.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- Black Holes
- Classical Theories of Gravity
- Scattering Amplitudes
- Supergravity Models
Publication and Content Type
- ref (subject category)
- art (subject category)
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