5 research outputs found
Atmosphere-Ionosphere Response to the M9 Tohoku Earthquake Revealed by Joined Satellite and Ground Observations. Preliminary results
The recent M9 Tohoku Japan earthquake of March 11, 2011 was the largest
recorded earthquake ever to hit this nation. We retrospectively analyzed the
temporal and spatial variations of four different physical parameters -
outgoing long wave radiation (OLR), GPS/TEC, Low-Earth orbit tomography and
critical frequency foF2. These changes characterize the state of the atmosphere
and ionosphere several days before the onset of this earthquake. Our first
results show that on March 8th a rapid increase of emitted infrared radiation
was observed from the satellite data and an anomaly developed near the
epicenter. The GPS/TEC data indicate an increase and variation in electron
density reaching a maximum value on March 8. Starting on this day in the lower
ionospheric there was also confirmed an abnormal TEC variation over the
epicenter. From March 3-11 a large increase in electron concentration was
recorded at all four Japanese ground based ionosondes, which return to normal
after the main earthquake. We found a positive correlation between the
atmospheric and ionospheric anomalies and the Tohoku earthquake. This study may
lead to a better understanding of the response of the atmosphere /ionosphere to
the Great Tohoku earthquakeComment: Preliminary results reported at EGU 2011 in Vienna, Austri
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
Final version of the KLF Proposal [C12-19-001] approved by JLab PAC48. The intermediate version of the proposal was posted in arXiv:1707.05284 [hep-ex]. 103 pages, 52 figures, 8 tables, 324 references. Several typos were fixedWe propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron beam will enable a flux on the order of , which exceeds the flux of that previously attained at SLAC by three orders of magnitude. The use of a deuteron target will provide first measurements ever with neutral kaons on neutrons. The experiment will measure both differential cross sections and self-analyzed polarizations of the produced , , , and hyperons using the GlueX detector at the Jefferson Lab Hall D. The measurements will span CM from to 0.95 in the range W = 1490 MeV to 2500 MeV. The new data will significantly constrain the partial wave analyses and reduce model-dependent uncertainties in the extraction of the properties and pole positions of the strange hyperon resonances, and establish the orbitally excited multiplets in the spectra of the and hyperons. Comparison with the corresponding multiplets in the spectra of the charm and bottom hyperons will provide insight into he accuracy of QCD-based calculations over a large range of masses. The proposed facility will have a defining impact in the strange meson sector through measurements of the final state system up to 2 GeV invariant mass. This will allow the determination of pole positions and widths of all relevant -,-,-,-, and -wave resonances, settle the question of the existence or nonexistence of scalar meson and improve the constrains on their pole parameters. Subsequently improving our knowledge of the low-lying scalar nonet in general