Spinor technique in graviton scattering processes

Cho, H. T.; Ng, Ka Lok

doi:10.1103/physrevd.47.1692

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…The first step is to insert spinor helicity simplifications into the kinematic expression (4). The spinor helicity method for gravitons [8,20] is related to that for vectors [21] by…”

Section: One-loop Rules For Gravitymentioning

confidence: 99%

String-based methods in perturbative gravity

1993

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“…The first step is to insert spinor helicity simplifications into the kinematic expression (4). The spinor helicity method for gravitons [8,20] is related to that for vectors [21] by…”

Section: One-loop Rules For Gravitymentioning

confidence: 99%

String-based methods in perturbative gravity

1993

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“…The classical arguments are essentially based on the study of the linearized gravitational equations in a nontrivial background, possibly with the introduction of appropriate Green's functions, or by means of the Jeffreys-Wentzel-Kramers-Brillouin (JWKB) or the partial wave methods. As far as the graviton scattering from elementary particles is concerned, the computation of the cross-section for the scattering of gravitons from scalar or Dirac particles, for example, can be found in [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Graviton scattering from classical matter

Guadagnini¹

2008

Class. Quantum Grav.

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The low-energy scattering of gravitons from a composite extended system, which is made of classical massive bodies, is considered; by using the Feynman rules of effective quantum gravity, the corresponding cross-section is computed to lowest order in powers of the gravitational coupling constant. For the gravitons scattering from a rotating planet or a star, it is shown that the classical limit of the matter–graviton coupling in the effective quantum gravity Lagrangian leads to a low-energy scattering amplitude which coincides with the expression obtained in classical general relativity.

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“…Keeping in mind that to order [57,58], 12) we find that within this approximation the Lagrangian for the interaction of a fermion with a weak gravitational field has the following form:…”

Section: Advances In High Energy Physicsmentioning

confidence: 99%

Interesting Examples of Violation of the Classical Equivalence Principle but Not of the Weak One

Accioly

Herdy

2018

Advances in High Energy Physics

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The equivalence principle (EP) and Schiff 's conjecture are discussed en passant, and the connection between the EP and quantum mechanics is then briefly analyzed. Two semiclassical violations of the classical equivalence principle (CEP) but not of the weak one (WEP), i.e., Greenberger gravitational Bohr atom and the tree-level scattering of different quantum particles by an external weak higher-order gravitational field, are thoroughly investigated afterwards. Next, two quantum examples of systems that agree with the WEP but not with the CEP, namely, COW experiment and free fall in a constant gravitational field of a massive object described by its wave-function Ψ, are discussed in detail. Keeping in mind that, among the four examples focused on in this work only COW experiment is based on an experimental test, some important details related to it are presented as well.

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Spinor technique in graviton scattering processes

Cited by 11 publications

References 9 publications

String-based methods in perturbative gravity

String-based methods in perturbative gravity

Graviton scattering from classical matter

Interesting Examples of Violation of the Classical Equivalence Principle but Not of the Weak One

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