Dark matter; Composite dark matter; Big Bang Nucleosynthesis; Anomalous isotopes
Abstract :
[en] Among composite-dark-matter scenarios, one of the simplest and most predictive is that of O-helium (OHe) dark atoms, in which a lepton-like doubly charged particle O is bound with a primordial helium nucleus, and is the main constituent of dark matter. This model liberates the physics of dark matter from many unknown features of new physics, and it demands a deep understanding of the details of known nuclear and atomic physics, which are still somewhat unclear in the case of nuclear interacting atomic shells. So far the model has relied on the dominance of elastic scattering of OHe with the matter. In view of the uncertainty in our understanding of OHe interaction with nuclei we study the opposite scenario, in which inelastic nuclear reactions dominate the OHe interactions with nuclei. We show that in this case all the OHe atoms bind with extra He nuclei, forming doubly charged O-beryllium ions, which behave like anomalous helium, causing potential problems with overabundance of anomalous isotopes in terrestrial matter.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Cudell, Jean-René ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Khlopov, Maxim; University Paris Diderot - Paris 7 > APC Laboratory
Wallemacq, Quentin ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Language :
English
Title :
Some potential problems of OHe composite dark matter
Publication date :
2014
Event name :
17th Bled Workshop "What Comes Beyond the Standard Models?"
Event organizer :
N.S. Mankoc Borstnik, H.B. Nielsen and D. Lukman
Event place :
Bled, Slovenia
Event date :
du 20 juillet 2014 au 28 juillet 2014
By request :
Yes
Audience :
International
Main work title :
Proceedings of the 17th Bled Workshop “What Comes Beyond the Standard Models?”
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