88 research outputs found
Update on with lattice QCD inputs
We report updated results for , the indirect CP violation
parameter in neutral kaons, which is evaluated directly from the standard model
with lattice QCD inputs. We use lattice QCD inputs to fix ,
, , , , and . Since Lattice 2016,
the UTfit group has updated the Wolfenstein parameters in the angle-only-fit
method, and the HFLAV group has also updated . Our results show that
the evaluation of with exclusive (lattice QCD
inputs) has tension with the experimental value, while that with
inclusive (heavy quark expansion based on OPE and QCD sum rules)
shows no tension.Comment: 8 pages, 7 figures, Lattice 2017 proceeding, references update
Unidirectional scattering with spatial homogeneity using photonic time disorder
The temporal degree of freedom in photonics has been a recent research
hotspot due to its analogy with spatial axes, causality, and open-system
characteristics. In particular, the temporal analogues of photonic crystals
have stimulated the design of momentum gaps and their extension to topological
and non-Hermitian photonics. Although recent studies have also revealed the
effect of broken discrete time-translational symmetry in view of the temporal
analogy of spatial Anderson localization, the broad intermediate regime between
time order and time uncorrelated disorder has not been examined. Here we
investigate the inverse design of photonic time disorder to achieve optical
functionalities in spatially homogeneous platforms. By developing the structure
factor and order metric using causal Green's functions for the domain of time
disorder, we demonstrate engineered time scatterer, which provides
unidirectional scattering with controlled scattering amplitudes. We also reveal
that the order-to-disorder transition in the time domain allows for the
manipulation of scattering bandwidths, which inspires resonance-free temporal
colour filtering. Our work will pave the way for advancing optical
functionalities without spatial patterning.Comment: 22 pages, 4 figure
Update on form factor at zero-recoil using the Oktay-Kronfeld action
We present an update on the calculation of
semileptonic form factor at zero recoil using the Oktay-Kronfeld bottom and
charm quarks on flavor HISQ ensembles generated by the MILC
collaboration. Preliminary results are given for two ensembles with and fm and MeV. Calculations have been done
with a number of valence quark masses, and the dependence of the form factor on
them is investigated on the fm ensemble. The excited state is
controlled by using multistate fits to the three-point correlators measured at
4--6 source-sink separations.Comment: 7 pages and 4 figures. Talk at The 36th Annual International
Symposium on Lattice Field Theory - LATTICE201
Transformation of (allo)securinine to (allo)norsecurinine via a molecular editing strategy
Securinega alkaloids have intrigued chemists since the isolation of securinine in 1956. This family of natural products comprises a securinane subfamily with a piperidine substructure and norsecurinane alkaloids featuring a pyrrolidine core. From a biosynthetic perspective, the piperidine moiety in securinane alkaloids derives from lysine, whereas the pyrrolidine moiety in norsecurinane natural products originates from ornithine, marking an early biogenetic divergence. Herein, we introduce a single-atom deletion strategy that enables the late-stage conversion of securinane to norsecurinane alkaloids. Notably, for the first time, this method enabled the transformation of piperidine-based (allo)securinine into pyrrolidine-based (allo)norsecurinine. Straightforward access to norsecurinine from securinine, which can be readily extracted from the plant Flueggea suffruticosa, abundant across the Korean peninsula, holds promise for synthetic studies of norsecurinine-based oligomeric securinega alkaloids
Modeling of Rf Interference Caused by Solid-State Drive Noise
In this paper, modeling of RFI problem caused by a solid-state drive (SSD) in a laptop is proposed. Two noise sources (one outside and one inside a cavity) in the SSD are reconstructed as dipole moments with magnitude-only near-field scanning data. The dipole moment inside a cavity is then replaced by a Huygens\u27 box covering four side surfaces of the cavity using a numerical simulation. The noise voltage at an RF antenna port is calculated by combining the two reconstructed noise sources with measured transfer functions. The model is successfully validated through a comparison of the calculation with measurement results
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