Even the photon propagator must break de Sitter symmetry

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00572395" target="_blank" >RIV/68378271:_____/23:00572395 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0348517" target="_blank" >https://hdl.handle.net/11104/0348517</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2023.137928" target="_blank" >10.1016/j.physletb.2023.137928</a>

Result language
angličtina
Original language name
Even the photon propagator must break de Sitter symmetry
Original language description
The propagator for the massless vector field in de Sitter space cannot maintain de Sitter invariance in the general covariant gauge, except in the exactly transverse limit. This is due to a previously overlooked Ward-Takahashi identity that the propagator must satisfy. We construct the propagator that satisfies all the necessary conditions, and that preserves cosmological symmetries and dilation, but breaks spatial special conformal transformations. Our propagator vanishes in the infrared, contrary to previously reported de Sitter invariant results, which is relevant for loop computations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GA20-28525S" target="_blank" >GA20-28525S: Strong Gravity as a Microscope for the Dark Universe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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