Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Reactions Governing Strangeness Abundance in Primordial Universe

Version 1 : Received: 10 September 2020 / Approved: 11 September 2020 / Online: 11 September 2020 (12:15:30 CEST)

How to cite: RAFELSKI, J.; Yang, C.T. Reactions Governing Strangeness Abundance in Primordial Universe. Preprints 2020, 2020090258 (doi: 10.20944/preprints202009.0258.v1). RAFELSKI, J.; Yang, C.T. Reactions Governing Strangeness Abundance in Primordial Universe. Preprints 2020, 2020090258 (doi: 10.20944/preprints202009.0258.v1).

Abstract

Strangeness flavor is abundant and in chemical equilibrium in the primordial Quark-Gluon Plasma(QGP) filling the early Universe. Upon hadronization near to T=150 MeV one may think that relatively short lived massive strange hadrons decay rapidly and strangeness disappears. However, we show using detailed balance considerations for inverse decay reactions that the back reaction repopulate strangeness keeping it in chemical equilibrium at least to the time when strange antibaryons annihilate near T≃30-50 MeV. However, our present study is focused on the meson sector of the hadronic Universe. Specifically, we establish here the temperature range in which the expansion of the Universe becomes faster compared to the production processes which balance natural strangeness decay: In the temperature interval 33MeV<T<20MeV: μ±+νμ→K±, π+π→K and l−+l+→ϕ reactions in sequence become slower compared to the characteristic Hubble time.

Subject Areas

strangeness; primordial universe; cosmology

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.