A5036284281- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- CCD and CMOS Imaging Sensors
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Advanced X-ray and CT Imaging
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- advanced mathematical theories
- Radiation Effects in Electronics
- Advanced Chemical Physics Studies
- Spacecraft and Cryogenic Technologies
University of Göttingen
2015-2024
Johannes Gutenberg University Mainz
1994-2023
Max Planck Institute for Physics
2007-2023
Universitat de Barcelona
2023
Ludwig-Maximilians-Universität München
2023
Technical University of Munich
2023
Halbleiterlabor of the Max-Planck-Society
2023
Charles University
2023
Instituto de Física de Cantabria
2023
University of Oregon
2014
The cross section for ee+ e- → π+ π- J/ψ between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near Υ(nS) (n = 1,2,…,5) resonances. Y(4260) state observed, its resonance parameters are determined. In addition, an excess of production around 4 observed. This feature can be described Breit-Wigner parametrization properties that consistent Y(4008) was previously reported Belle. study decays, structure observed in M(π(±)J/ψ) mass spectrum 5.2σ...
We report a measurement of the branching fraction ratios R(D(*)) Bbar -> D(*) tau- nubar_tau relative to D()* l- nubar_l (where l = e or mu) using full Belle data sample 772 x 10^6 BBbar pairs collected at Y(4S) resonance with detector KEKB asymmetric-energy e+e- collider. The measured values are R(D)= 0.375 +- 0.064(stat.) 0.026(syst.) and R(D*) 0.293 0.038(stat.) 0.015(syst.). analysis uses hadronic reconstruction tag-side B meson purely leptonic tau decays. results consistent earlier...
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Doublet Models (2HDMs). data experiments been statistically combined. results are interpreted within 2HDM Type I II benchmark scenarios. No significant excess has observed when compared to Standard Model background prediction, combined exclude large regions model parameter space. Charged with mass below 80 \({\rm GeV}/c^{2}\) (Type scenario) or 72.5 scenario,...
We perform a full amplitude analysis of B0→ψ′K+π− decays, with ψ′→μ+μ− or e+e−, to constrain the spin and parity Z(4430)−. The JP=1+ hypothesis is favored over 0−, 1−, 2− 2+ hypotheses at levels 3.4σ, 3.7σ, 4.7σ 5.1σ, respectively. based on 711 fb−1 data sample that contains 772×106 BB¯ pairs collected Υ(4S) resonance by Belle detector asymmetric-energy e+e− collider KEKB.7 MoreReceived 20 June 2013DOI:https://doi.org/10.1103/PhysRevD.88.074026© 2013 American Physical Society
We present a determination of the magnitude Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ using decay $B\to D\ell\nu_\ell$ ($\ell=e,\mu$) based on 711 fb$^{-1}$ $e^+e^-\to \Upsilon(4S)$ data recorded by Belle detector and containing $772 \times 10^6$ $B\bar{B}$ pairs. One $B$ meson in event is fully reconstructed hadronic mode while other, signal side, partially from charged lepton either $D^+$ or $D^0$ total 23 modes. The isospin-averaged branching fraction found to be...
We present a measurement of the differential shapes exclusive $B\ensuremath{\rightarrow}{D}^{*}\ensuremath{\ell}{\overline{\ensuremath{\nu}}}_{\ensuremath{\ell}}$ ($B={B}^{\ensuremath{-}},{\overline{B}}^{0}$ and $\ensuremath{\ell}=e$, $\ensuremath{\mu}$) decays with hadronic tag-side reconstruction for full $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ Belle dataset. extract Caprini-Lellouch-Neubert (CLN) Boyd-Grinstein-Lebed (BGL) form factor parameters use an external input absolute...
The electric form factor of the neutron ${G}_{E,n}$ has been measured in quasifree ${}^{2}\mathrm{H}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}}\stackrel{\ensuremath{\rightarrow}}{n})p$ reaction using 855 MeV polarized cw electron beam Mainz Microtron MAMI. polarization scattered neutrons was analyzed a polarimeter consisting two walls plastic scintillators. precession spin magnetic field used for first time to circumvent measurement effective analyzing power and...
We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] events collected at the Υ(4S) resonance with Belle detector KEKB asymmetric-energy e(+)e(-) collider. Evidence a new in χ(c1)γ final state is found statistical significance 3.8σ. This has mass 3823.1±1.8(stat)±0.7(syst) MeV/c(2), value that consistent theoretical expectations for previously unseen 1(3)D(2) cc[over meson. find no other narrow set upper limits on branching fractions X(3872)→χ(c1)γ χ(c2)γ decays.
We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements cross sections and full amplitude analysis. The measured at sqrt(s)=10.865 GeV corrected for initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments two bottomonium-like Zb+-...
A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at Belle II experiment SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected ϒ(4S) resonance and a 9 60 MeV below resonance. Because measurable signature involves only single charged kaon, novel measurement approach used that exploits not properties decay, but also inclusive other B meson in ϒ(4S)→BB[over event, suppress...
The Belle II experiment at KEK in Japan considers upgrading its vertex detector system to address the challenges posed by high background levels caused increased luminosity of SuperKEKB collider. One proposal for aims install a 5-layer all monolithic pixel based on fully depleted CMOS sensors 2027. new will use OBELIX MAPS chips improve robustness and reduce occupancy through small fast pixels. This causes better track finding, especially low transverse momenta tracks. text focus predecessor...
Abstract A series of data samples was collected with the Belle II detector at SuperKEKB collider from March 2019 to June 2022. We determine integrated luminosities these using three distinct methodologies involving Bhabha ( ), digamma and dimuon ) events. The total luminosity obtained Bhabha, digamma, events is (426.88 ± 0.03 2.61) fb −1 , (429.28 2.62) (423.99 0.04 3.83) where first uncertainties are statistical second systematic. resulting combination methods (427.87 2.01) .
This report summarizes a study of the physics potential CLIC e+e- linear collider operating at centre-of-mass energies from 1 TeV to 5 with luminosity order 10^35 cm^-2 s^-1. First, complex is surveyed, emphasis on aspects related its capabilities, particularly and energy, also possible polarization, \gamma\gamma e-e- collisions. The next Test facility, CTF3, R&D programme are reviewed. We then discuss experimentation CLIC, including backgrounds experimental conditions, present conceptual...
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...
We report the first observation of Y(5S) -> Y(nS) pi0 decays. The neutral partner Zb+-(10610), Zb0(10610) decaying to Y(2,3S) pi0, is observed for time with a 6.5 sigma significance using Dalitz analysis results are obtained 121.4 fb^-1 data sample collected Belle detector at resonance KEKB asymmetric-energy e+e- collider.