—
The composition of rhizosphere microbial communities was studied for different species and varieties of agricultural gramineous plants (rye and wheat) grown in the soils contrasting in a number of ...agrochemical parameters. The data on analysis of the rhizosphere microbial communities obtained by sequencing of the V4 variable region of the 16S rRNA gene and on the ion and mass spectral composition of soil extracts are presented. Alpha diversity indices of the rhizosphere and control communities were almost the same. Analysis of beta diversity revealed higher variability of the rhizosphere microbial communities for chernozem-grown plants. Rhizosphere communities of the plants grown on sod-podzol soil were more similar and formed separate clusters. The taxa reliably involved in formation of specific rye and wheat rhizosphere microbiomes were established. Both common rhizosphere taxa (
Sphingobacteriia
,
Betaproteobacteria
) and species- or variety-specific ones (
Oxalobacteraceae
,
Sphingobacteriaceae
) were determined. Ion concentrations in soil extracts varied significantly depending on the soil type, while the similarity of mass spectral profiles depended more on the plant species than on the soil type.
We present a search for lepton-flavor-violating τ decays into three leptons (electrons or muons) using 782 fb−1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. ...No evidence for these decays is observed and we set 90% confidence level upper limits on the branching fractions between 1.5×10−8 and 2.7×10−8.
Abstract The $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}\gamma $$ K + → π + π 0 π 0 γ decay is observed by the OKA collaboration. About 60 events of the decay observed with signal:noise $$\approx ...1$$ ≈ 1 . The branching ratio obtained by normalization to $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}$$ K + → π + π 0 π 0 is measured to be $$(3.7 \pm 0.9(stat) \pm 0.3(syst))\times 10^{-6}$$ ( 3.7 ± 0.9 ( s t a t ) ± 0.3 ( s y s t ) ) × 10 - 6 for $$E_{\gamma }^*>10\,\textrm{MeV}$$ E γ ∗ > 10 MeV . The branching ratio, $$\gamma $$ γ energy spectrum and angular distribution are consistent with ChPT prediction.
We present the results of the first Dalitz plot analysis of the decay D0 → K−π+η. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb−1 collected by the ...Belle detector at the asymmetric-energy e+e− KEKB collider. The Dalitz plot is well described by a combination of the six resonant decay channels K* ( 892 )0η, K−a0 ( 980 )+, K−a2 ( 1320 )+, K* ( 1410 )0η, K* ( 1680 )−π+ and K2* ( 1980 )−π+, together with Kπ and Kη S-wave components. The decays K* ( 1680 )− → K−η and K2* ( 1980 )− → K−η are observed for the first time. We measure ratio of the branching fractions, ... (B PDG). Using the Dalitz fit result, the ratio ... is measured to be ...; this is much lower than the theoretical expectations ( ≈ 1 ) made under the assumption that K*( 1680 ) is a pure 13D1 state. The product branching fraction ... is determined. In addition, the π η ′ contribution to the a0( 980 )± resonance shape is confirmed with 10.1 σ statistical significance using the three-channel Flatté model. We also measure ... . This is consistent with, and more precise than, the current world average ( 1.02 ± 0.30 ) % , deviates with a significance of more than 3 σ from the theoretical predictions of (0.51–0.92)%. (ProQuest: ... denotes formulae omited.).
A
bstract
We report the first measurement of the inclusive
e
+
e
−
→
$$ b\overline{b} $$
b
b
¯
→
$$ {D}_s^{\pm } $$
D
s
±
X
and
e
+
e
−
→
$$ b\overline{b} $$
b
b
¯
→ D
0
/
$$ {\overline{D}}^0 $$
D
¯
...0
X
cross sections in the energy range from 10
.
63 to 11
.
02 GeV. Based on these results, we determine
σ
(
e
+
e
−
→
$$ {B}_s^0{\overline{B}}_s^0 $$
B
s
0
B
¯
s
0
X
) and
σ
(
e
+
e
−
→
$$ B\overline{B} $$
B
B
¯
X
) in the same energy range. We measure the fraction of
$$ {B}_s^0 $$
B
s
0
events at Υ(10860) to be
f
s
= (
$$ {22.0}_{-2.1}^{+2.0} $$
22.0
−
2.1
+
2.0
)%. We determine also the ratio of the
$$ {B}_s^0 $$
B
s
0
inclusive branching fractions
$$ \mathcal{B} $$
B
(
$$ {B}_s^0 $$
B
s
0
→ D
0
/
$$ {\overline{D}}^0 $$
D
¯
0
X
)
/
$$ \mathcal{B} $$
B
(
$$ {B}_s^0 $$
B
s
0
→
$$ {D}_s^{\pm } $$
D
s
±
X
) = 0
.
416 ± 0
.
018 ± 0
.
092. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energy
e
+
e
−
collider.
We present an analysis of the exclusive B+ → π+ π− ℓ+ νℓ decay, where ℓ represents an electron or a muon, with the assumption of charge-conjugation symmetry and lepton universality. The study ...exploits the full Υ ( 4 S ) data sample collected by the Belle detector, corresponding to 711 fb−1 of integrated luminosity. Events are selected by fully reconstructing one B meson in hadronic decay modes, subsequently determining the properties of the other B meson. We extract the signal yields using a binned maximum-likelihood fit to the missing-mass squared distribution in bins of the invariant mass of the two pions or the momentum transfer squared. We measure a total branching fraction of B(B+ → π+ π− ℓ+ νℓ) = 22.7+1.9 −1.6 (stat) ± 3.5(syst) × 10−5, where the uncertainties are statistical and systematic, respectively. This result is the first reported measurement of this decay.
PDF
