New bound on Lorentz violation based on the absence of vacuum Cherenkov radiation in ultrahigh energy air showers

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

New bound on Lorentz violation based on the absence of vacuum Cherenkov radiation in ultrahigh energy air showers

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

New bound on Lorentz violation based on the absence of vacuum Cherenkov radiation in ultrahigh energy air showers

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

—

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

107

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

083004

Kód UT WoS článku

000977345100012

EID výsledku v databázi Scopus

2-s2.0-85152801377