A. Gorišek
A5107634555- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Diamond and Carbon-based Materials Research
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Radiation Effects in Electronics
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- CCD and CMOS Imaging Sensors
- Advanced Data Storage Technologies
- Nuclear physics research studies
- Nuclear Physics and Applications
- advanced mathematical theories
- Muon and positron interactions and applications
- Advanced X-ray and CT Imaging
Jožef Stefan Institute
2016-2025
University of Ljubljana
2016-2025
Jožef Stefan International Postgraduate School
2017-2025
The University of Adelaide
2014-2023
University of California, Santa Cruz
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2019-2023
Heidelberg University
2020
Chinese University of Hong Kong
2019
University of Göttingen
2015-2016
University of Toronto
2016
We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader states is measured to have a mass 2978.5+/-2.1+/-2.0 MeV/c2 and width 43.5+/-7.5+/-7.0 MeV/c2. narrow state are be 3076.7+/-0.9+/-0.5 MeV/c;{2} 6.2+/-1.2+/-0.8 MeV/c2, respectively. also perform search for isospin partner Lambda(c)(+)Kappa(0)/(s)pi(-) observe significant signal at 3082.8+/-1.8+/-1.5 data used this analysis were accumulated or near Upsilon(4S) resonance, using...
We report on a search for new resonant states in the process γγ→D¯¯¯D. A candidate C-even charmonium state is observed vicinity of 3.93 GeV/c2. The production rate and angular distribution γγ center-of-mass frame suggest that this previously unobserved χ′c2, 23P2 state.Received 15 December 2005DOI:https://doi.org/10.1103/PhysRevLett.96.082003©2006 American Physical Society
We present the first evidence of decay B -→ τ -ντ , using 414 fb -1 data collected at Υ(4S) resonance with Belle detector KEKB asymmetric-energy e + -collider.Events are tagged by fully reconstructing one mesons in hadronic modes.We detect signal a significance 3.5 standard deviations including systematics, and measure branching fraction to be B(B ) = (1.79+0.56 -0.49(stat) +0.46 -0.51 (syst)) × 10 -4 .This implies that fB 0.229 +0.036 -0.031 (stat) +0.034 -0.037 (syst) GeV is direct...
The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around quark's momentum vector. Using two different reconstruction methods, we find evidence statistically significant asymmetries for charged pion pairs e(+)e(-) annihilation at center-of-mass energy 10.52 GeV, which can be attributed to polarization primordial quarks. measurement was performed using sample 79 x 10(6) events collected Belle detector.
We observe evidence for D0−¯¯¯D0 mixing by measuring the difference in apparent lifetime when a D0 meson decays to CP eigenstates K+K− and π+π− it final state K−π+. find relative of lifetimes yCP be [1.31±0.32(stat)±0.25(syst)]%, 3.2 standard deviations from zero. also search asymmetry between ¯¯¯D0 decays; no violation is found. These results are based on 540 fb−1 data recorded Belle detector at KEKB e+e− collider.Received 31 March 2007DOI:https://doi.org/10.1103/PhysRevLett.98.211803©2007...
We report the first observation of a near-threshold enhancement in D(0)D[over](0)pi(0) system from B-->D(0)D[over](0)pi(0)Kappa decays using 414 fb(-1) data sample collected at Upsilon(4S) resonance. The peaks mass M=3875.2+/-0.7(+0.3)/(-1.6) +/-0.8 MeV/c2 and branching fraction for events peak is B(B-->D(0)D[over](0)pi(0)Kappa)=(1.22+/-0.31(+0.23)/(-0.30))x10(-4). were with Belle detector KEKB energy-asymmetric e+ e- collider.
We present an improved measurement of the branching fraction for electroweak penguin process $B\ensuremath{\rightarrow}{X}_{s}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$, where $\ensuremath{\ell}$ is electron or a muon and ${X}_{s}$ hadronic system containing $s$-quark. The based on sample $152\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4S)\ensuremath{\rightarrow}B\overline{B}$ events collected with Belle detector at KEKB energy asymmetric...
Novel silicon detectors with charge gain were designed (Low Gain Avalanche Detectors - LGAD) to be used in particle physics experiments, medical and timing applications. They are based on a n++-p+-p structure where appropriate doping of multiplication layer (p^+) is needed achieve high fields impact ionization. Several wafers processed different junction parameters resulting gains up 16 at voltages. In order study radiation hardness LGAD, which one key requirements for future energy several...
We report results on a Dalitz analysis of three-body charmless ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ decay including searches for direct $CP$ violation. the first observation ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{f}_{2}(1270){K}^{\ifmmode\pm\else\textpm\fi{}}$ with statistical significance above $6\ensuremath{\sigma}$. also...
We present measurements of decay amplitudes and triple-product correlations in $B\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{*}$ decays based on $253\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data recorded at the $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector KEKB ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. The for three different helicity states are determined from angular distributions final-state particles. longitudinal polarization found to be...
Using a $282\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected by the Belle experiment at KEKB ${e}^{+}{e}^{\ensuremath{-}}$ collider, we study ${D}^{0}$ decays to ${K}^{\ensuremath{-}}{\ensuremath{\ell}}^{+}\ensuremath{\nu}$ and ${\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\ell}}^{+}\ensuremath{\nu}$ final states. The flavor momentum are tagged through full reconstruction of recoiling charm meson additional mesons from fragmentation. method provides very good...
We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample $103\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the Belle detector KEKB accelerator. consider into main charmed hadron ground states, namely ${D}^{0},{D}^{+},{D}_{s}^{+}$ and ${\ensuremath{\Lambda}}_{c}^{+}$, as well excited states ${D}^{*0}$ ${D}^{*+}$. The functions are important to measure they describe processes low energy scale, where calculations in perturbation theory lead large...
We report the first measurement of forward-backward asymmetry and ratios Wilson coefficients A9/A7 A10/A7 in B→K∗ℓ+ℓ−, where ℓ represents an electron or a muon. find evidence for with significance 3.4σ. The results are obtained from data sample containing 386×106 B¯¯¯B pairs that were collected on Υ(4S) resonance Belle detector at KEKB asymmetric-energy e+e− collider.Received 8 March 2006DOI:https://doi.org/10.1103/PhysRevLett.96.251801©2006 American Physical Society
We present a measurement of the unitarity triangle angle ${\ensuremath{\phi}}_{3}$ using Dalitz plot analysis ${K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decay neutral $D$ meson from ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{D}^{(*)}{K}^{(*)\ifmmode\pm\else\textpm\fi{}}$ process. The method exploits interference between ${D}^{0}$ and ${\overline{D}}^{0}$ to extract ${\ensuremath{\phi}}_{3}$, strong phase $\ensuremath{\delta}$ ratio $r$ suppressed...
We report the results of a search for D0-D0 mixing in D0 --> K+ pi- decays based on 400 fb(-1) data accumulated by Belle detector at KEKB. Both assuming CP conservation and allowing violation, we fit decay-time distribution parameters x y, as well parameter R(D), ratio doubly Cabibbo-suppressed to Cabibbo-favored decays. The 95% confidence level region (x'2,y') plane is obtained using frequentist method. Assuming conservation, find x'2 < 0.72 10(-3) -9.9 y' 6.8 level; these are most...
We present new measurements of CP-violation parameters in B0 -> phiK0, K+K-Ks, f0(980)Ks, eta'Ks, omegaKs and Kspi0 decays based on a sample 275 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with Belle detector KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed one specified decay channels, flavor accompanying identified from its products. for each modes are obtained asymmetries distributions proper-time intervals between two decays. The combined...
Beam conditions and the potential detector damage resulting from their anomalies have pushed LHC experiments to build own beam monitoring devices. The ATLAS Conditions Monitor (BCM) consists of two stations (forward backward) detectors each with four modules. sensors are required tolerate doses up 500 kGy in excess 1015 charged particles per cm2 over lifetime experiment. Each module includes diamond read out parallel. located symmetrically around interaction point, positioning at z = ±184 cm...
Measurements of the kinematic distributions $J/ψ$ mesons produced in $p-$C, $p-$Ti and $p-$W collisions at $\sqrt{s}=41.6 \mathrm{GeV}$ Feynman-$x$ region $-0.34 < x_{F} 0.14$ for transverse momentum up to $p_T = 5.4 \mathrm{GeV}/c$ are presented. The $x_F$ $p_T$ dependencies nuclear suppression parameter, $α$, also given. results based on $2.4 \cdot 10^{5}$ both $e^+ e^-$ $μ^{+}μ^{-}$ decay channels. data have been collected by HERA-B experiment HERA proton ring DESY laboratory....
Beam test results of the radiation tolerance study chemical vapour deposition (CVD) diamond against different particle species and energies is presented. We also present beam on independence signal size incident rate in charged detectors based un-irradiated irradiated poly-crystalline CVD over a range fluxes from 2 kHz/cm2 to 10 MHz/cm2. The pulse height sensors was measured with readout electronics peaking time 6 ns. In addition functionality 3D devices demonstrated tests are shown be...
Charge collection properties of particle detectors made in HV-CMOS technology were investigated before and after irradiation with reactor neutrons. Two different sensor types designed processed 180 350 nm by AMS. Edge-TCT charge measurements electrons from 90Sr source employed. Diffusion generated carriers undepleted substrate contributes significantly to the irradiation, while drift contribution prevails as shown at shaping times. The depleted region a given bias voltage was found grow...
We have searched for Theta+(1540) and Xi(--)(1862) pentaquark candidates in proton-induced reactions on C, Ti, W targets at midrapidity square root of s = 41.6 GeV. In 2 x 10(8) inelastic events we find no evidence narrow (sigma approximately 5 MeV) signals the Theta+ --> pK0(S) Xi(--) Xi- pi- channels; our 95% C.L. upper limits (UL) inclusive production cross section times branching fraction B dsigma/dy/(y 0) are (4-16) mub/N a mass between 1521 1555 MeV, 2.5 Xi(--). The UL yield ratio...