Physical, astrophysical and cosmological aspects of composite dark matter

par Maxim Yu. Khlopov (Centre for Cosmoparticle physic

lundi 6 févr. 2006, 00:00 → 00:00 US/Central

Amphi Pierre Lehmann (LAL)

Composite dark matter hides stable heavy charged particles in neutral atom-like states. Physical examples of such stable particles are given by U-quark of 4th generation from heterotic string phenomenology, by tera-particles of S.L.Glashow's Sinister model and by AC-leptons from models, based on almost commutative geometry. In the early Universe formation of composite dark matter is accompanied by formation of various fractions of exotic matter, which are severely constrained by searches for anomalous isotopes. These constraints rule out existence of stable -1 charge particles like tera electron of Glashow's model, but leaves room for existence of -2 charge particles, forming an exciting bound state with primordial ⁴He - an alpha-particle with screened charge, which might be a source of new forms of nuclear transformations. In the context of this approach accelerator and cosmic ray search for new stable quarks and leptons acquires the significance of experimentum crucis for charged components of composite dark matter.

transparents transparents