Extremely long-lived charged massive particles as a probe for reheating of the Universe

2007/04/30 by Fumihiro Takayama · 4 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1103/physrevd.77.116003

published as Phys.Rev.D77:116003,2008 · 7 pages, 2 figures, published in Physical Review D

openalex publication_date 2008/06/16 · arxiv created 2008/06/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We discuss the impact of charged massive particle big bang nucleosynthesis to explore the nature of the reheating of the Universe in the case that a new extremely long-lived charged massive particle (CHAMP) exists. If the mass of the CHAMP is within collider reach and its lifetime is longer than 10⁴ s, the comparison between the charged big bang nucleosynthesis prediction and observed ⁶Li abundances may indicate nonstandard reheating in the early Universe without relying on details of the decay properties. Even if the CHAMP mass is outside the reach of colliders, the cosmological considerations may provide a nontrivial hint for the existence of such very heavy long-lived CHAMPs from the late Universe if the daughter particles are the dominant component of the present dark matter. We consider a low reheating temperature model as an example of the nonstandard reheating scenarios.

Cited by

• Big-bang nucleosynthesis and gravitinos
• Flaxino dark matter and stau decay
• Dark Matter Candidates from Particle Physics and Methods of Detection
• The gravitino–stau scenario after catalyzed big bang nucleosynthesis

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