Measurement of branching fractions for BtoJ/psietaKB to J/psi eta K decays and search for a narrow resonance in the J/psietaJ/psi eta final state

We report an observation of the $B^{pm } to J/psi eta K^{pm }$ and $B^0 to J/psi eta K^0_S$ decays using $772times 10^{6}Boverline {B}$ pairs collected at the $Upsilon (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We obtain the branching fractions ${mathcal B}(B^{pm }rightarrow J/psi eta K^{pm })=(1.27pm 0.11(hbox {stat.})pm 0.11(hbox {syst.}))times 10^{-4}$ and ${mathcal B}(B^0to J/psi eta K^0_S)=(5.22 pm 0.78 (hbox {stat.}) pm 0.49 (hbox {syst.}))times 10^{-5}$. We search for a new narrow charmonium(-like) state $X$ in the $J/psi eta$ mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, ${mathcal B}(B^pm to XK^pm){mathcal B}(X to J/psi eta)$, at $3872,hbox {MeV},c^{-2}$ where a $C$-odd partner of $X(3872)$ may exist, at $psi (4040)$ and $psi (4160)$ assuming their known mass and width, and over a range from 3.8 to $4.8,hbox {GeV},c^{-2}$. The obtained upper limits at 90% confidence level for $X^{Chbox {-}{rm odd}}(3872)$, $psi (4040)$, and $psi (4160)$ are $3.8times 10^{-6}$, $15.5times 10^{-6}$, and $7.4times 10^{-6}$, respectively

Transformations of halogenated and chalcogenated organic compounds following the principles of green chemistry

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Optimization of the flip down drawer cover hinge on the free-standing cooker

Magistrska naloga obravnava optimizacijo tečaja pokrova na prostostoječem štedilniku. V prvem delu je predstavljena teorija o nekovinskih gradivih s poudarkom na polimerih. Zajema strukturne značilnosti, vzroke za staranje polimerov in primerov konstrukcijskih posebnosti. V drugem delu je predstavljena razvojna faza od ideje do same realizacije. Pri tem smo uporabili napredna računalniška orodja za izdelavo 3D modelov in MKE analize. Izdelana je tudi stroškovna analiza. Na koncu pa predstavimo dobljene rezultate.The master\u27s thesis focused on the optimization of the flip down drawer cover hinge on the free-standing cooker. In the first part we introduce the theory of non-metallic materials with a focus on polymers. It covers structural features, causes of aging of the polymers, and examples of construction exceptions. The second part presents the development phase from idea to realization itself. We used advanced computer tools to produce 3D models and FEM analysis. We did also cost analysis. And at the end we presented the results

Application of temporal convolutional neural network for the classification of crops on Sentinel-2 time series

The recent development of Earth observation systems - like the Copernicus Sentinels - has provided access to satellite data with high spatial and temporal resolution. This is a key component for the accurate monitoring of state and changes in land use and land cover. In this research, the crops classification was performed by implementing two deep neural networks based on structured data. Despite the wide availability of optical satellite imagery, such as Landsat and Sentinel-2, the limitations of high quality tagged data make the training of machine learning methods very difficult. For this purpose, we have created and labeled a dataset of the crops in Slovenia for the year 2017. With the selected methods we are able to correctly classify 87% of all cultures. Similar studies have already been carried out in the past, but are limited to smaller regions or a smaller number of crop types

Measurement of time-dependent CP violation in B 0 → η′K 0 decays

We present a measurement of the time-dependent CP violation parameters in B0 → η′K0 decays. The measurement is based on the full data sample containing 772 × 10^6 BB pairs collected at the Υ(4S) resonance using the Belle detector at the KEKB asymmetric-energy e+e− collider. The measured values of the mixing-induced and direct CP violation parameters are: sin⁡ 2ϕ1eff=+0.68±0.07±0.03, Aη′K0=+0.03±0.05±0.04, where the first uncertainty is statistical and the second is systematic. The values obtained are the most accurate to date. Furthermore, these results are consistent with our previous measurements and with the world-average value of sin 2ϕ1 measured in B0 → J/ψK0 decays

Search for B decays to final states with the η c meson

We report a search for B decays to selected final states with the ηc meson: B± → K±ηcπ+π−, B± → K±ηcω, B± → K±ηcη and B± → K±ηcπ0. The analysis is based on 772 × 10^6 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We set 90% confidence level upper limits on the branching fractions of the studied B decay modes, independent of intermediate resonances, in the range (0.6–5.3)×10^−4. We also search for molecular-state candidates in the D^0 ¯D^∗0 − ¯D^0D^∗0, D^0 ¯D^0 + ¯D^0D^0 and D^∗0¯D^∗0 + ¯D^∗0D^∗0 combinations, neutral partners of the Z(3900)± and Z(4020)±, and a poorly understood state X(3915) as possible intermediate states in the decay chain, and set 90% confidence level upper limits on the product of branching fractions to the mentioned intermediate states and decay branching fractions of these states in the range (0.6–6.9)×10^−5

Measurement of D0–D‾0 mixing and search for CP violation in D0 → K+K−,π+π− decays with the full Belle data set

We report an improved measurement of $D^0–{overline{D}}^0$ mixing and a search for $CP$ violation in $D^0$ decays to $CP$ -even final states $K^+K^−$ and $pi^+pi^-$. The measurement is based on the final Belle data sample of $976 fb^{−1}$. The results are $y_CP=(1.11±0.22±0.09)$ and $A_Γ=(−0.03±0.20±0.07)$, where the first uncertainty is statistical and the second is systematic

First model-independent Dalitz analysis of B0toD0Kast0B^0 to D^0K^{ast 0}, DtoKS0pi+pi−Dto K_S^0pi ^+pi ^- decay

We report a measurement of the amplitude ratio $r_S$ of $B^0 to D^0K^{ast 0}$ and $B^0 to bar {D^0}K^{ast 0}$ decays with a Dalitz analysis of $Dto K_S^0pi ^+pi ^-$ decays, for the first time using a model-independent method. We set an upper limit $r_S < 0.87$ at the 68% confidence level, using the full data sample of $711,{rm fb}^{-1}$ corresponding to $772times 10^6$ $Bbar {B}$ pairs collected at the $Upsilon (4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. This result is obtained from observables $x_- = +0.4 ^{+1.0 +0.0}_{-0.6 -0.1} pm 0.0$, $y_- = -0.6 ^{+0.8 +0.1}_{-1.0 -0.0} pm 0.1$, $x_+ = +0.1 ^{+0.7 +0.0}_{-0.4 -0.1} pm 0.1$, and $y_+ = +0.3 ^{+0.5 +0.0}_{-0.8 -0.1} pm 0.1$, where $x_pm = r_S cos (delta _S pm phi _3)$, $y_pm = r_S sin (delta _S pm phi _3)$, and $phi _3 (delta _S)$ is the weak (strong) phase difference between $B^0 to D^0K^{ast 0}$ and $B^0 to bar {D^0}K^{ast 0}$