27542402
Can cosmic strangelets reach the earth?
The mechanism for the propagation of strangelets with low baryon number through the atmosphere of the Earth has been explored. It has been shown that, under suitable initial conditions, such strangelets may indeed reach depths near mountain altitudes with mass numbers and charges close to the observed values in cosmic ray experiments.
119496708
Strangeness, cosmological cold dark matter and dark energy
It is now believed that the universe is composed of a small amount of the normal luminous matter, a substantial amount of matter (cold dark matter (CDM)) which is non-luminous and a large amount of smooth energy (dark energy (DE)). Both CDM and DE seem to require ideas beyond the standard model of particle interactions. In this work, we argue that CDM and DE can arise entirely from the standard principles of strong interaction physics out of the same mechanism.
119089270
The Cosmic QCD Phase Transition, Quasi-baryonic Dark Matter and Massive Compact Halo Objects
We propose that the cold dark matter (CDM) is composed entirely of quark matter, arising from a cosmic quark-hadron transition. We denote this phase as "quasibaryonic", distinct from the usual baryons. We show that compact gravitational lenses, with masses around 0.5 (M_{\odot}), could have evolved out of the quasibaryonic CDM.
15746247
Massive Compact Halo Objects from the relics of the cosmic quark - hadron transition
The existence of compact gravitational lenses, with masses around 0.5 M O ., has been reported in the halo of the Milky Way. The nature of these dark lenses is as yet obscure, particularly because these objects have masses well above the threshold for nuclear fusion. In this work, we show that they find a natural explanation as being the evolutionary product of the metastable false vacuum domains (the so-called strange quark nuggets) formed in a first order cosmic quark-hadron transition.
6848119
Relics of cosmic quark-hadron phase transition and massive compact halo objects
Abstract We propose that the cold dark matter (CDM) is composed entirely of quark matter, arising from a cosmic quark-hadron transition. We show that compact gravitational objects, with masses around 0.5 M ⊙ , could have evolved out of the such CDM.
6894202
The Cosmological Quark-Hadron Transition and Massive Compact Halo Objects
One of the abiding mysteries in the so-called standard cosmological model is the nature of the dark matter. It is universally accepted that there is an abundance of matter in the universe which is non-luminous, due to their very weak interaction, if at all, with the other forms of matter, excepting of course the gravitational attraction. Speculations as to the nature of dark matter are numerous, often bordering on exotics, and searches for such exotic matter is a very active field of astroparticle physics at the dawn of the new century. Nevertheless, in recent years, there has been experimental evidence for at least one form of dark matter - the massive compact halo objects detected through gravitational microlensing effects proposed by Paczynski some years ago. To date, no clear consensus as to what these objects, referred to in the literature as well as in the following by the acronym MACHO, are made of; for a brief discussion of some of the suggestions, see below. In this work, we show that they find a natural explanation as leftover relics from the putative first order cosmic quark - hadron phase transition that is predicted by the standard model of particle interactions to have occurred during the microsecond epoch of the early universe.
26544987
Gauge independent analysis of Chern-Simons theory with matter coupling.
We show that the Chern-Simons theory coupled to complex scalars can be consistently quantized in the Hamiltonian formalism without gauge constraints. A new structure of the anyon operator displaying fractional spin and statistics follows logically from our analysis without any {ital ad} {ital hoc} assumptions.
34164831
Oblique electroweak corrections and new physics.
Oblique electroweak parameters {ital {tilde S}}, {ital {tilde T}}, and {ital {tilde U}}, defined so as to be nonvanishing only for physics beyond the standard model, are determined by direct use of high-statistics data from the CERN {ital e}{sup +}{ital e{minus}} collider LEP at different energy points around the {ital Z} peak. Additional information from related electroweak measurements are used as constraints. The results are {ital {tilde S}}={minus}0.76{plus minus}0.71, {ital {tilde T}}={minus}0.70{plus minus}0.49, and {ital {tilde U}}={minus}0.11{plus minus}1.07. The consequent restrictions on extra fermion generations and an extra neutral gauge boson are discussed.