92 research outputs found

### Dark-matter particles and baryons from inflation and spontaneous CP violation in the early universe

We present aspects of a model which attempts to unify the creation of cold
dark matter, a CP-violating baryon asymmetry, and also a small, residual vacuum
energy density, in the early universe. The model contains a primary scalar
(inflaton) field and a primary pseudoscalar field, which are initially related
by a cosmological, chiral symmetry. The nonzero vacuum expectation value of the
pseudoscalar field spontaneously breaks CP invariance.Comment: 7 pages, appendix adde

### Effects of a dynamical role for exchanged quarks and nuclear gluons in nuclei: multinucleon correlations in deep-inelastic lepton scattering

It is shown that new data from the HERMES collaboration, as well as all of
the earlier improved data from experiments concerning the EMC effect and
shadowing in deep-inelastic scattering of leptons from nuclei, provide strong
evidence for an explicit dynamical role played by exchanged quarks and nuclear
gluons in the basic, tightly-bound systems of three and four nucleons, He3 and
He4. This opens the way for specific quark-gluon dynamics instigating
multinucleon correlations in nuclei.Comment: 15 pages, 2 figures. Minor changes. New forma

### A new implication for strong interactions if large, direct CP violation in Bbar^0(B^0) -> pi^+pi^- is confirmed

We show that the large, direct CP-violation parameter
$A_{\pi\pi}=-C_{\pi\pi}$, reported by the BELLE collaboration in the decays
Bbar^0(B^0) -> \pi^+\pi^-, implies an unusual situation in which the presence
of a very large difference between two strong-interaction phases ~ -110 deg.
plays an essential role. We make the demonstration within a model of strong,
two-body quasi-elastic interactions between physical hadrons. The model can
accommodate a large difference between two strong-interaction phases, for which
it provides a natural enhancement.Comment: 6 pages, no figure

### Long-range interactions between dark-matter particles in a model with a cosmological, spontaneously-broken chiral symmetry

In a cosmological model with a chiral symmetry, there are two,
dynamically-related spin-zero fields, a scalar $\phi$ and a pseudoscalar $b$.
These fields have self-interactions. Spontaneous symmetry breaking results in a
very massive scalar particle with m_\phi\cong 5 \times 10^{11}\GeV, and a
nearly massless, (Goldstone-like) pseudoscalar particle with 0< m_b <~
2.7\times 10^{-6}\eV. One or both particles can be part of dark matter. There
are coherent long-range interactions (at range \sim 1/m_b \simgt 10\cm), from
exchange of a $b$ particle between a pair of $b$ particles, a pair of $\phi$
particles, and between a $\phi$ and a $b$. We compare the strength of
potentials for the different pairs to the corresponding gravitational
potentials (within the same range $\sim 1/m_b$), and show that the new force
dominates between a b pair, that gravitation dominates between a $\phi$ pair,
and that the potentials are comparable for a $\phi$-$b$ pair. The new
interaction strength between a $b$ pair is comparable to the gravitational
interaction between a $\phi$ pair; its possibly greater coherent effect
originates in the possibility that the number density of a very light $b$ can
be greater than that of a massive $\phi$. We consider these results in the
context of recent speculations concerning possible effects of special forces
between dark-matter particles on certain galactic, and inter-galactic,
properties.Comment: 8 pages, 1 figure. Appendix adde

### Stronger Neutrino Interactions at Extremely High Energies and the Muon Anomalous Magnetic Moment

A specific model of parity-conserving lepton substructure is considered. We
show that a positive-definite contribution to the muon $(g-2)/2$ at the
possible level of about $4\times 10^{-9}$, can be related to a significant
increase in the interaction cross section for cosmic-ray neutrinos with
energies above about $10^{19}$ eV. The additional cross section at $\sim
10^{20}$ eV is calculated to be $\sim 10^{-29}$ cm$^2$, which is about 100
times the standard weak-interaction cross section. The model involves an
extremely massive, neutral lepton, with $m_L\cong 2\times 10^6$ GeV fixed by
the new contribution to $(g-2)/2$.Comment: 7 pages, 3 figure

### Are neutral Goldstone bosons initiating very energetic air showers and anomalous multiple-core structure as a component of cosmic rays?

We consider two recently accentuated, unusual empirical results concerning
cosmic-ray events at high energies. We show that the possibility for a
correlated explanation is provided by new dynamics which arises from collisions
of a neutral Goldstone boson as a component of the highest-energy cosmic rays.Comment: 6 pages, 2 figures. Some comments adde

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