R. Pestotnik
A5060397910- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Radiation Effects in Electronics
- Advanced X-ray and CT Imaging
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Methane Hydrates and Related Phenomena
- Astrophysics and Cosmic Phenomena
- Photocathodes and Microchannel Plates
- Advanced NMR Techniques and Applications
- CCD and CMOS Imaging Sensors
- Distributed and Parallel Computing Systems
Jožef Stefan Institute
2016-2025
University of Ljubljana
1997-2023
Korea Institute of Science & Technology Information
2023
University of the Basque Country
2013-2022
University of Bonn
2013-2022
Duke University
2022
Campbell Collaboration
2012-2022
Chonnam National University
2015-2022
Tokyo Metropolitan University
2015-2019
Beihang University
2015-2018
We report the results of a search for charmonium-like state produced in process gamma --> omega J/psi 3.9-4.2 GeV/c^2 mass region. observe significant enhancement, which is well-described by resonant shape with M = (3915 +/- 3 2) MeV/c^2 and total width Gamma (17 10 3) MeV. This enhancement may be related to one or more three states so far reported 3.90-3.95
We report a study of $B\to (J/\psi \gamma) K$ and (\psi' \gamma)K$ decay modes using $772\times 10^{6}$ $B\bar{B}$ events collected at the \Upsilon(4S)$ resonance with Belle detector KEKB energy-asymmetric $e^+ e^-$ collider. observe $X(3872) \to J/\psi \gamma$ first evidence for $\chi_{c2} in (X_{c\bar{c}}\gamma) decays, while search \psi' no significant signal is found. measure branching fractions, $\mathcal{B}(B^{\pm} X(3872) K^{\pm}) \mathcal{B}(X(3872) J/\psi\gamma)$ $=$...
The process $\gamma \gamma \to \phi \jpsi$ is measured for $\phi masses between threshold and 5 GeV/${\it c}^2$, using a data sample of 825 fb$^{-1}$ collected with the Belle detector. A narrow peak $8.8^{+4.2}_{-3.2}$ events, significance 3.2 standard deviations including systematic uncertainty, observed. mass natural width structure (named X(4350)) are to be $(4350.6^{+4.6}_{-5.1}(\rm{stat})\pm 0.7(\rm{syst})) \hbox{MeV}/{\it c}^2$ $(13^{+18}_{-9}(\rm{stat})\pm 4(\rm{syst})) \hbox{MeV}$,...
We present a study of $B\ensuremath{\rightarrow}X(3872)K$ with $X(3872)$ decaying to ${D}^{*0}{\overline{D}}^{0}$ using sample $657\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs recorded at the $\ensuremath{\Upsilon}(4S)$ resonance Belle detector KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Both ${D}^{*0}\ensuremath{\rightarrow}{D}^{0}\ensuremath{\gamma}$ and ${D}^{*0}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{0}$ decay modes are used. find peak...
We report measurements of production cross sections for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>ρ</a:mi><a:mo>+</a:mo></a:msup></a:math>, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>ρ</c:mi><c:mn>0</c:mn></c:msup></c:math>, <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>ω</e:mi></e:math>, <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"...
We present a measurement of the decay B−→τ−ν¯τ using data sample containing 657×106 BB¯ pairs collected at Υ(4S) resonance with Belle detector KEKB asymmetric-energy e+e− collider. A B+B− are tagged by reconstructing one B+ meson decaying semileptonically. detect candidate in recoil. obtain signal significance 3.6 standard deviations including systematic uncertainties, and measure branching fraction to be B(B−→τ−ν¯τ)=[1.54−0.37+0.38(stat)−0.31+0.29(syst)]×10−4. This result confirms evidence...
We report measurements of the branching fractions and direct CP asymmetries (A_{CP}) for B->K pi, pi KK decays (but not pi^0 pi^0) based on final data sample 772x10^6 B B-bar pairs collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric-energy e^+ e^- collider. set a 90% confidence-level upper limit K^+- K^-+ 2.0x10^{-7}; all other are observed ranging from 10^{-6} to 10^{-5}. In $B^0/B^0-bar -> K^+-\pi^-+ mode, we confirm Belle's previously reported large A_{CP} value -0.069...
The cross section for e^+e^- \to \eta J/\psi between \sqrt{s}=3.8 GeV/c^2 and 5.3 is measured via initial state radiation using 980 fb^{-1} of data on around the \Upsilon(nS)(n=1,2,3,4,5) resonances collected with Belle detector at KEKB. Two resonant structures \psi(4040) \psi(4160) are observed in invariant mass distribution. Fitting spectrum coherent sum two Breit-Wigner functions, one obtains BR(\psi(4040)\to\eta J/\psi)\cdot\Gamma_{ee}^{\psi(4040)} = (4.8\pm0.9\pm1.4) eV...
Measurements of inclusive differential cross sections for charged pion and kaon production in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation have been carried out at a center-of-mass energy $\sqrt{s}=10.52\text{ }\text{ }\mathrm{GeV}$. The measurements were performed with the Belle detector KEKB collider using data sample containing $113\ifmmode\times\else\texttimes\fi{}{10}^{6}$ ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}q\overline{q}$ events, where $q={u,d,s,c}$. We present...
Abstract Background Panel detectors have the potential to provide a flexible, modular approach Positron Emission Tomography (PET), enabling customization meet patient‐specific needs and scan objectives. The panel design allows be positioned close patient, aiming enhance sensitivity spatial resolution through improved geometric coverage reduced noncollinearity blurring. Parallax error can mitigated using depth of interaction (DOI) information. Purpose One key questions article addresses is:...
Abstract The use of a new optoelectronic readout chain with 𝒪(100)ps time resolution is major milestone in the development RICH detectors for environments high number particle interactions per bunch crossing, such as High-Luminosity LHC. A prototype chain, based on MAPMT and SiPM photon sensors coupled to electronics integrating FastIC ASIC TDC-in-FPGA, presented. an 8-channel analogue-to-digital conversion 25 ps resolution. This predecessor FastRICH LHCb upgrades. signals from are...
The $e^+e^- \to \pi^+ \pi^- \pi^0 \chi_{bJ}$ ($J=0,~1,~2$) processes are studied using a 118~fb$^{-1}$ data sample collected at center-of-mass energy of 10.867 GeV, in the $\Upsilon(10860)$ range, with Belle detector. $\pi^+ \chi_{b1}$, $\pi^+\pi^-\pi^0\chi_{b2}$, $\omega\chi_{b1}$ signals and evidence $\omega\chi_{b2}$ observed for first time cross sections measured. No significant $\pi^+\pi^-\pi^0\chi_{b0}$ or $\omega\chi_{b0}$ signal is 90\% confidence level upper limits on these two...
We report a measurement of $CP$ violating asymmetries in ${B}^{0}({\overline{B}}^{0})\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{K}_{S}^{0}$ decays with time-dependent Dalitz approach. This analysis is based on data sample $657\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs accumulated at the $\ensuremath{\Upsilon}(4S)$ resonance Belle detector KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. As result an unbinned maximum likelihood fit to selected...
We have made a precise measurement of the absolute branching fractions Bs->Ds(*)+ Ds(*)- decays using 121.4 fb-1 data recorded by Belle experiment running on Upsilon(5S) resonance. The results are B(Bs0->Ds+ Ds-) = (0.58 +0.11 -0.09 +-0.13)%, B(Bs0->Ds*+- Ds-+) (1.8 +-0.2 +-0.4)%, and B(Bs0->Ds*+ Ds*-) (2.0 +-0.3 +-0.5)%; sum is B(Bs0->Ds(*)+ (4.3 +-0.4 +-1.0)%. Assuming saturates to CP-even final states, fraction constrains ratio Delta(Gamma_s)/cos(phi_s), where Delta(Gamma_s) difference in...
The lifetime of the τ lepton is measured using process e+e−→τ+τ−, where both leptons decay to 3πντ. result for mean lifetime, based on 711 fb−1 data collected with Belle detector at Υ(4S) resonance and 60 MeV below, τ=(290.17±0.53(stat)±0.33(syst))×10−15 s. first measurement difference between τ+ τ− performed. upper limit relative positive negative |Δτ|/τ<7.0×10−3 90% C.L.Received 1 November 2013DOI:https://doi.org/10.1103/PhysRevLett.112.031801© 2014 American Physical Society
We present measurements of the masses and decay widths baryonic states ${\mathrm{\ensuremath{\Sigma}}}_{c}(2455{)}^{0/++}$ ${\mathrm{\ensuremath{\Sigma}}}_{c}(2520{)}^{0/++}$ using a data sample corresponding to an integrated luminosity $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with Belle detector at KEKB ${e}^{+}{e}^{\ensuremath{-}}$ asymmetric-energy collider operating $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance. report mass differences respect...
We report preliminary results on the analysis of three-body Y(10860)=> B barB pi, Y(10860) => (B barB* + c.c.) pi and B* decays including an observation Zb(10610)+- pi-+ [B barB*+c.c]+- Zb(10650)+- [B* barB*]+- as intermediate channels. measure branching fractions to be Br(Y(10860)=> barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} pi-+)=(14.1+-1.9+-2.4)x10^{-3} set 90% C.L. upper limit barB]+- pi-+)<4.0x10^{-3}. also amplitude Y(10860)=>Y(nS)pi+pi-, n=1,2,3 internal structure...