New bound on Lorentz violation based on the absence of vacuum Cherenkov radiation in ultrahigh energy air showers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A90232%2F23%3A00603853" target="_blank" >RIV/68378271:90232/23:00603853 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevD.107.083004" target="_blank" >https://doi.org/10.1103/PhysRevD.107.083004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.107.083004" target="_blank" >10.1103/PhysRevD.107.083004</a>
Alternative languages
Result language
angličtina
Original language name
New bound on Lorentz violation based on the absence of vacuum Cherenkov radiation in ultrahigh energy air showers
Original language description
In extensive air showers induced by ultrahigh energy (UHE) cosmic rays, secondary particles are produced with energies far above those accessible by other means. These extreme energies can be used to search for new physics. We study the effects of isotropic, nonbirefringent Lorentz violation in the photon sector. In case of a photon velocity smaller than the maximum attainable velocity of standard Dirac fermions, vacuum Cherenkov radiation becomes possible. Implementing this Lorentz-violating effect in air-shower simulations, a significant reduction of the calculated average atmospheric depth of the shower maximum (Xmax) is obtained. Based on (Xmax) and its shower-to-shower fluctuations sigma(Xmax), a new bound on Lorentz violation is derived which improves the previous one by a factor of 2. This is the first such bound based on the absence of vacuum Cherenkov radiation from fundamental particles (electrons and positrons) in air showers. Options for further improvements are discussed.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
—
Continuities
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Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
107
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
083004
UT code for WoS article
000977345100012
EID of the result in the Scopus database
2-s2.0-85152801377