Título:
Unitarization of the one-loop graviton-graviton scattering amplitudes and study of the graviball.
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Autor:
Oller, J.A.
Peláez, Marcela
Peláez, Marcela
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Artículo
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Año de publicación:
2025
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Resumen:
From the graviton-graviton scattering amplitudes calculated perturbatively in quantum gravity to the oneloop order, we develop further a formalism that allows one to calculate infrared-finite partial-wave amplitudes fulfilling perturbative unitarity. As a result of this process a parameter dubbed ln𝑎 emerges that separate between infrared and typical external momenta. The resulting partial-wave amplitudes are next unitarized by employing the Inverse Amplitude Method and the algebraic-𝑁∕𝐷 method. Then, the graviball resonance, with a similar pole position, is confirmed in the 𝑆-wave partial-wave amplitude for all unitarization methods, also with respect to the unitarization of only the leading-order amplitude. Although the spectrum of the theory is independent of the specific value of ln𝑎, the requirement for a well-behaved unitarized effective field theory of gravity identifies the optimal range of ln𝑎 for our next-to-leading-order calculations as 0.5 ≲ ln𝑎≲1.7. Briefly, we discuss the 𝐷-wave scattering that is weaker than the 𝑆-wave scattering, repulsive and non-resonant for ln𝑎 ≈1.
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Elsevier
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Physics Letters B, Vol. 861, Feb. 2025, 139275.
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Proyecto ANII FCE_1_2023_1_175902.
Citación:
Oller, J. y Peláez, M. "Unitarization of the one-loop graviton-graviton scattering amplitudes and study of the graviball". Physics Letters B Vol. 861. [en línea] Feb. 2025, 8 p. DOI : https://doi.org/10.1016/j.physletb.2025.139275.
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Licencia Creative Commons Atribución (CC - By 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| OP25.pdf | Versión definitiva | 1.14 MB | Adobe PDF |