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Study of the excited charm and charm-strange mesons
We give a systematical study on the recently reported excited charm and
charm-strange mesons with potential spin-parity, including the
, , , ,
and . The main strong decay properties are
obtained by the framework of Bethe-Salpeter (BS) methods. Our results reveal
that the two charm-strange mesons can be well described by the further
- mixing scheme with a mixing angle of
degrees. The predicted decay ratio
for is .~ can also be
explained as the predominant state with a mixing angle of
degrees. Considering the mass range, and
are more likely to be the predominant states,
although the total widths under both the and assignments
have no great conflict with the current experimental data. The calculated width
for LHCb seems about 100 \si{MeV} larger than experimental
measurement if taking it as or dominant state .
The comparisons with other calculations and several important decay ratios are
also present. For the identification of these charm mesons, further
experimental information, such as
are necessary.Comment: 18 pages, 3 figure
3-Methyl-4-oxo-2-phenyl-4H-chromene-8-carboxylic acid
In the title compound, C17H12O4, the chromene unit is approximately planar, the maximum deviation from the mean plane being 0.0166β
Γ
. The attached phenyl ring makes a dihedral angle of 53.2β
(1)Β° with the fused ring system. The packing of the molΒecules in the crystal structure is governed by CβHβ―O and OβHβ―O hydrogen-bonding interΒactions
- β¦