15,530 research outputs found
The production of neutral resonance with hidden beauty from scattering
We investigate the discovery potential of the predicted neutral hidden beauty
resonance through scattering within an effective
Lagrangian approach. Two reactions and
are studied in this work, with nucleon pole
exchange as the background. It is found that the contributions of the
resonance give clear peak structures in the magnitude of 1
near the threshold of the in the total cross sections. The
numerical results indicate that the center of mass energy 11-11.1 GeV
would be a best energy window for searching the resonance, where
the signal can be easily distinguished from the background. The
COMPASS experiment at CERN's Super Proton Synchrotron (SPS) with pion beam of
280 GeV will be an ideal platform for searching the super-heavy
resonance with hidden beauty, which is hopeful to test the theoretical results
Instability of Reissner-Nordstr\"{o}m black hole in Einstein-Maxwell-scalar theory
The scalarization of Reissner-Nordstr\"{o}m black holes was recently proposed
in the Einstein-Maxwell-scalar theory. Here, we show that the appearance of the
scalarized Reissner-Nordstr\"{o}m black hole is closely related to the
Gregory-Laflamme instability of the Reissner-Nordstr\"{o}m black hole without
scalar hair.Comment: 22 pages, 10 figures, version to appear in EPJ
Instability of small AdS black holes in sixth-order gravity
We investigate the stability analysis of AdS black holes in the higher
dimensional sixth-order gravity. This gravity is composed of Ricci cubic
gravity and Lee-Wick term. It indicates that the Ricci tensor perturbations
exhibit unstable modes for small AdS black holes in Ricci cubic gravity by
solving the Lichnerowicz-type linearized equation. We show that the correlated
stability conjecture holds for the AdS black hole by computing all
thermodynamic quantities in Ricci cubic gravity. Furthermore, we find a newly
non-AdS black hole in Ricci cubic gravity by making use of a static
eigenfunction of the Lichnerowicz operator.Comment: 27 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1801.0462
Stability of scalarized charged black holes in the Einstein-Maxwell-Scalar theory
We analyze the stability of scalarized charged black holes in the
Einstein-Maxwell-Scalar (EMS) theory with quadratic coupling. These black holes
are labelled by the number of , where is called the
fundamental black hole and denote the -excited black holes.
We show that the black hole is stable against full perturbations, whereas
the excited black holes are unstable against the -mode scalar
perturbation. This is consistent with the EMS theory with exponential coupling,
but it contrasts to the scalarized black hole in the
Einstein-Gauss-Bonnet-Scalar theory with quadratic coupling. This implies that
the endpoint of unstable Reissner-Nordstr\"{o}m black holes with
is the black hole with the same . Furthermore, we study the scalarized
charged black holes in the EMS theory with scalar mass .Comment: 23 pages, 11 figures. arXiv admin note: text overlap with
arXiv:1812.0360
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