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Inferring type and scale of noncommutativity from the PTOLEMY experiment

Horvat, Raul; Trampetić, Josip; You, Jiangyang (2018) Inferring type and scale of noncommutativity from the PTOLEMY experiment. European Physical Journal C: Particles and Fields, 78 (7). ISSN 1434-6044

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Abstract

If neutrinos are Dirac particles and their right-handed components can be copiously produced in the early universe, then they could influence a direct observation of the cosmic neutrino background, which, most likely, will come about with the recently proposed PTOLEMY experiment. For coupling of photons to the right-handed neutrinos we use a state-of-the-art version of gauge field theory deformed by the spacetime noncommutativity, to disclose by it not only the decoupling temperature for the said neutrino component, but also the otherwise hidden coupling temperature. Considering two relevant processes, the plasmon decay and the neutrino elastic scattering, we study the interplay between the structure of the noncommutativity parameter θμν (type of noncommutativity) and the reheating temperature after inflation to obtain otherwise elusive upper bound on the scale of noncommutativity ΛNC. If PTOLEMY enhanced capture rate is due to spacetime noncommutativity, we verify that a nontrivial maximum upper bound on ΛNC (way below the Planck scale) emerges for a space-like θμν and sufficiently high reheating temperature.

Item Type: Article
Uncontrolled Keywords: Big Bang nucleosynthesis ; Neutrinos ; Noncommutative geometry
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Division of Physical Chemistry
Projects:
Project titleProject leaderProject codeProject type
Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNINGFabrizio NESTI692194EK
prema kvantnoj gravitaciji: nekomutativna geometrija, teorija polja i kozmologija-tqgngftcStjepan MeljanacIP-2014-09-9582HRZZ
Depositing User: Jiangyang You
Date Deposited: 11 Sep 2019 08:25
Last Modified: 11 Sep 2019 08:26
URI: http://fulir.irb.hr/id/eprint/5006
DOI: 10.1140/epjc/s10052-018-6052-1

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