10,009 research outputs found
Neutron--Antineutron Oscillations at the Surface of Nuclei
We discuss some aspects of possible neutron--antineutron oscillations in
nuclei. The phenomenon occurs mostly at the surface of nuclei, and hence {\sl
i)} is not very sensitive to medium corrections and {\sl ii)} makes use of the
antinucleon-nucleus interaction in a region probed by experiments at CERN.Comment: Contr. Oak Ridge Workshop on Workshop on Baryon Instability, Latex, 4
pages, comments to [email protected]
Faddeev calculation of a quasi-bound state
We report on the first genuinely three-body
coupled-channel Faddeev calculation in search for quasi-bound states in the
system. The main absorptivity in the subsystem is accounted
for by fitting to data near threshold. Our calculation yields one such
quasi-bound state, with , , bound in the range MeV, with a width of MeV. These results differ
substantially from previous estimates, and are at odds with the signal observed by the FINUDA collaboration.Comment: Minor editorial revision; version accepted for publication in Phys.
Rev. Let
On the Stability of Matter
A hypothesis of absolutely stable strange hadronic matter composed of
baryons, here denoted , is tested within many-body
calculations performed using the Relativistic Mean-Field approach. In our
calculations, we employed the interaction compatible with
the binding energy ~MeV given
by the phenomenological energy-independent interaction model by
Yamazaki and Akaishi (YA). We found that the binding energy per , as
well as the central density in many-body systems saturates for mass
number , leaving aggregates highly unstable against
strong interaction decay. Moreover, we confronted the YA interaction model with
kaonic atom data and found that it fails to reproduce the single-nucleon
absorption fractions at rest from bubble chamber experiments.Comment: Proceedings of the HYP2018 conference, Norfolk/Portsmouth, USA, June
24 - 29, 2018, submitted to AIP Conference Proceeding
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