Search for photoproduction of axionlike particles at GlueX
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Engineering topics
Hagen, M.
Publications and source records attributed to Hagen, M..
Measurement of spin density matrix elements in Λ ( 1520 ) photoproduction at 8.2–8.8 GeV
We report on the measurement of spin density matrix elements of the $\Lambda(1520)$ in the photoproduction reaction $\gamma p\rightarrow \Lambda(1520)K^+$, via its subsequent decay to $K^{-}p$. The measurement was performed as part of the GlueX experimental program in Hall D at Jefferson Lab using a linearly polarized photon beam with $E_\gamma =$ 8.2-8.8 GeV. These are the first such measurements in this photon energy range. Results are presented in bins of momentum transfer squared, $-(t-t_\text{0})$. We compare the results with a Reggeon exchange model and determine that natural exchange amplitudes are dominant in $\Lambda(1520)$ photoproduction.
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Robust detection of ionospheric irregularities
The approach outlined in this paper conservatively bounds the ionospheric errors even for the worst observed ionospheric conditions to date, using data sets taken from the operational receivers in the WAAS reference station network.
Wide Area Augmentation System (WAAS) ionosphere ir↗