C. Mariñas
A5074221114- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Radiation Effects in Electronics
- Superconducting Materials and Applications
- Advanced X-ray and CT Imaging
- Nuclear physics research studies
- Advanced Semiconductor Detectors and Materials
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Scientific Research and Discoveries
- Scientific Computing and Data Management
- Calibration and Measurement Techniques
- advanced mathematical theories
Universidade de Santiago de Compostela
2014-2024
Instituto de Física Corpuscular
2010-2024
Austrian Academy of Sciences
2024
Institute of High Energy Physics
2024
Universitat de València
2020-2024
Max Planck Institute for Physics
2022-2023
Institut Pluridisciplinaire Hubert Curien
2023
Universitat de Barcelona
2023
Johannes Gutenberg University Mainz
2023
Ludwig-Maximilians-Universität München
2023
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
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 We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( "Image missing"<!-- image only, no MathML or LaTex -->) mesons at Belle II. The provide essential inputs for measurements mixing and charge-parity violation. validate evaluate performance using hadronic --> decays with flavor-specific final states reconstructed in a data set corresponding an integrated luminosity 62.8 fb $$^{-1}$$ <mml:math...
Abstract Targeting a peak luminosity of 6 × 10 35 cm -2 s -1 , the Belle II experiment at SuperKEKB in Japan is considering an upgrade its interaction region. This involves vertex detector, which will be replaced by new fully pixelated detector (VTX). A monolithic CMOS pixel sensor named OBELIX (Optimized BELle pIXel) proposed to used VTX. Based on existing TJ-Monopix2 chip initially developed for ATLAS Inner Tracker (ITk) upgrade, designed 180 nm process with improved matrix and additional...
In the new Belle II detector, which is currently under construction at SuperKEKB accelerator, a two layer pixel detector will be introduced to improve vertex reconstruction in ultra high luminosity environment. The produced using DEPFET technology. A ASIC (Data Handling Processor or DHP) designed steer readout process, pre-process and compress raw data has been developed. DHP directly bump bonded balcony of all-silicon module. current chip prototype CMOS 90 nm. Its test results, including...
Monolithic Active Pixel Sensors (MAPS) have been developed since the late 1990s based on silicon substrates with a thin epitaxial layer (thickness of 10–15 μm) in which charge is collected an electrode, albeit by disordered and slow diffusion rather than drift directed electric field. As consequence, signal these conventional MAPS small (≈1000 e−) radiation tolerance limited. In this paper, development fully Depleted (DMAPS) high resistivity substrate allowing creation depleted detection...
The DEPFET collaboration develops highly granular, ultra-transparent active pixel detectors for high-performance vertex reconstruction at future collider experiments. characterization of detector prototypes has proven that the key principle, integration a first amplification stage in detector-grade sensor material, can provide comfortable signal to noise ratio over 40 thickness 50-75 $\mathrm{\mathbf{\mu m}}$. ASICs have been designed and produced operate with required read-out speed. A...
Abstract The SuperKEKB collider will undergo a major upgrade to reach the target luminosity of 6 × 10 35 cm -2 s -1 during long shutdown (LS2) foreseen start around year 2027. We are developing new vertex detector (VTX) replace current one (VXD). This pixel silicon tracker aims be both more robust against higher level machine background and performant in terms precision on decay vertices standalone track finding efficiency. baseline layout consists two layers composing inner part (iVTX)...
Abstract The Belle II collaboration has initiated a program to upgrade its detector in order address the challenges set by increase of SuperKEKB collider luminosity, targeting 6×10 35 cm 2 s -1 . A monolithic CMOS pixel sensor named OBELIX (Optimized BELle pIXel) is proposed equip 5 detection layers upgrading current vertex detector. Based on existing TJ-Monopix2, currently designed 180 nm process.
The results of a search for hydrogen-like atoms consisting $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with nickel target has been seen in terms characteristic pairs their breakup the same ($178 \pm 49$) and Coulomb final state interaction ($653 42$). Using these analysis yields first value lifetime $\tau=(2.5_{-1.8}^{+3.0})$ fs model-independent measurement S-wave isospin-odd scattering length...
The observation of hydrogenlike πK atoms, consisting π^{-}K^{+} or π^{+}K^{-} mesons, is presented. atoms are produced by 24 GeV/c protons from the CERN PS accelerator, interacting with platinum nickel foil targets. breakup (ionization) in same targets yields characteristic pairs, called "atomic pairs," small relative momenta Q pair center-of-mass system. upgraded DIRAC experiment observed 349±62 such atomic corresponding to a signal 5.6 standard deviations. This first statistically...
In order to profit from the increased luminosity provided by SuperKEKB accelerator in future, improvements should be brought current Belle II detector. The collaboration has thus proposed upgrade of inner vertex detector a new VTX detector, with target cope higher luminosity. A DMAPS sensor named OBELIX is and expected submitted 2024. design ASIC based on previously designed prototype TJ-Monopix2 chip, will feature completely digital periphery.
We present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with DIRAC experiment at CERN-PS. The $\pi K$-atoms are produced by 24 GeV/c proton beam in a thin Pt-target and $\pi^\pm$ $K^\mp$-mesons from atom dissociation analyzed two-arm magnetic spectrometer. observed enhancement low relative momentum corresponds to production 173 $\pm$ 54 K$-atoms. mean life is related s-wave K$-scattering lengths, measurement which goal experiment. From...
After observing and investigating the double-exotic (a atom is a bound system, in which both oppositely charged components are unstable particles like μ,π,K,…) π+π− with ground state lifetime τ of about 3×10−15 s, upgraded DIRAC experiment at CERN PS accelerator observes for first time long-lived states same lifetimes 10−11 s more. The number characteristic pion pairs resulting from breakup (ionisation) atoms amounts to 436±61, corresponding signal-to-error ratio better than 7 standard...