Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00363481" target="_blank" >RIV/68407700:21340/22:00363481 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-022-11113-2" target="_blank" >https://doi.org/10.1140/epjc/s10052-022-11113-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-022-11113-2" target="_blank" >10.1140/epjc/s10052-022-11113-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data

Popis výsledku v původním jazyce

In this paper we employ a recent proposal of C. Tsallis and formulate the first law of thermodynamics for gravitating systems in terms of the extensive but non additive entropy. We pay a particular attention to an integrating factor for the heat one-form and show that in contrast to conventional thermodynamics it factorizes into thermal and entropic part. Ensuing two laws of thermodynamics imply Tsallis cosmology, which is then subsequently used to address the observed discrepancy between current bound on the Dark Matter relic abundance and present IceCube data on high-energy neutrinos. To resolve this contradiction we keep the conventional minimal Yukawa-type interaction between standard model and Dark Matter particles but replace the usual Friedmann field equations with Tsallis-cosmologybased modified Friedmann equations. We show that when the Tsallis scaling exponent 8 similar to 1.57 (or equivalently, the holographic scaling exponent alpha similar to 3.13) the aforementioned discrepancy disappears.

Název v anglickém jazyce

Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data

Popis výsledku anglicky

In this paper we employ a recent proposal of C. Tsallis and formulate the first law of thermodynamics for gravitating systems in terms of the extensive but non additive entropy. We pay a particular attention to an integrating factor for the heat one-form and show that in contrast to conventional thermodynamics it factorizes into thermal and entropic part. Ensuing two laws of thermodynamics imply Tsallis cosmology, which is then subsequently used to address the observed discrepancy between current bound on the Dark Matter relic abundance and present IceCube data on high-energy neutrinos. To resolve this contradiction we keep the conventional minimal Yukawa-type interaction between standard model and Dark Matter particles but replace the usual Friedmann field equations with Tsallis-cosmologybased modified Friedmann equations. We show that when the Tsallis scaling exponent 8 similar to 1.57 (or equivalently, the holographic scaling exponent alpha similar to 3.13) the aforementioned discrepancy disappears.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

82

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000898465700001

EID výsledku v databázi Scopus

2-s2.0-85144427619