K. Petridis
A5114375500- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Distributed and Parallel Computing Systems
- Particle accelerators and beam dynamics
- International Science and Diplomacy
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced NMR Techniques and Applications
- Markov Chains and Monte Carlo Methods
- Planetary Science and Exploration
- Noncommutative and Quantum Gravity Theories
University of Bristol
2016-2025
Rutherford Appleton Laboratory
2012-2024
Daresbury Laboratory
2024
University of Manchester
2013-2024
Universitat Ramon Llull
2023
RWTH Aachen University
2023
Universitat de Barcelona
2023
University of Cambridge
2023
Imperial College London
2007-2022
Petersburg Nuclear Physics Institute
2012-2021
Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting the full scientific potential of CERN’s accelerator complex and infrastructures through projects complementary to LHC other possible future colliders. These will target fundamental physics questions in modern particle physics. This document presents status proposals presented framework Standard Model working group, explore their reach impact that CERN could have next 10–20 years on international landscape.
The next generation of very-short-baseline reactor experiments will require compact detectors operating at surface level and close to a nuclear reactor. This paper presents new detector concept based on composite solid scintillator technology. target uses cubes polyvinyltoluene interleaved with 6LiF:ZnS(Ag) phosphor screens detect the products inverse beta decay reaction. A multi-tonne system built from these individual cells can provide precise localisation scintillation signals, making...
A deep understanding of how solution-processed solar cells (SSCs) perform under varying temperatures and irradiance is crucial for their optimal design, synthesis, use. However, current partial spectral characterization, primarily below the band gap wavelengths (λ < λg), limits insights into full operation. In this work, we expand knowledge by providing comprehensive full-spectrum experimental optical characterizations (∼300-2500 nm) theoretical optical-thermal-electrical analysis most...
The European Particle Physics Strategy Update (EPPSU) process takes a bottom-up approach, whereby the community is first invited to submit proposals (also called inputs) for projects that it would like see realised in near-term, mid-term and longer-term future. National inputs as well from Laboratories are also an important element of process. All these then reviewed by Preparatory Group (PPG), whose role organize Symposium around submitted ideas prepare discussion on importance merits...
The SoLid experiment, short for Search Oscillations with a Lithium-6 detector, is new generation neutrino experiment which tries to address the key challenges high precision
A method for analysing the hadronic resonance contributions in B¯0→K¯∗0μ+μ- decays is presented. This uses an empirical model that relies on measurements of branching fractions and polarisation amplitudes final states involving JPC=1-- resonances, relative to short-distance component, across full dimuon mass spectrum transitions. The good agreement with existing calculations non-local effects. effect this contribution angular observables presented it demonstrated how narrow resonances q2...
The SoLid collaboration has developed a new detector technology to detect electron anti-neutrinos at close proximity the Belgian BR2 reactor surface level. A 288 kg prototype was deployed in 2015 and collected data during operational period of shut-down. Dedicated calibration campaigns were also performed with gamma neutron sources. This paper describes construction high control on its proton content stability operation over several months after deployment site. All cells provide sufficient...
Physics Beyond Colliders is an exploratory study aimed at exploiting the full scientific potential of CERN's accelerator complex and its infrastructure in next two decades through projects complementary to LHC, HL-LHC other possible future colliders. These should target fundamental physics questions that are similar spirit those addressed by high-energy colliders, but require different types beams experiments. A kick-off workshop held September 2016 identified a number areas interest working...
We present a method that maximizes the experimental sensitivity to new physics contributions in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>B</a:mi><a:mo>±</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:mrow><a:msup><a:mi>π</a:mi><a:mo>±</a:mo></a:msup><a:msup><a:mi>μ</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>μ</a:mi><a:mo>−</a:mo></a:msup></a:mrow></a:math> decays. This relies on performing an unbinned maximum likelihood fit both measured dimuon...
The SoLid experiment aims to measure neutrino oscillation at a baseline of 6.4 m from the BR2 nuclear reactor in Belgium. Anti-neutrinos interact via inverse beta decay (IBD), resulting positron and neutron signal that are correlated time space. detector operates surface building, with modest shielding, relies on extremely efficient online rejection backgrounds order identify these interactions. A novel design has been developed using 12800 5 cm cubes for high segmentation. Each cube is...
This paper presents a comprehensive optimisation study to maximise the light collection efficiency of scintillating cube elements used in SoLid detector. Very short baseline reactor experiments, like SoLid, look for active sterile neutrino oscillation signatures anti-neutrino energy spectrum as function distance core and energy. Performing precise search requires high yield uniformity response detector volume. The experiment uses an innovative hybrid technology with two different...
This paper presents the first study of Graphcore's Intelligence Processing Unit (IPU) in context particle physics applications. The IPU is a new type processor optimised for machine learning. Comparisons are made neural-network-based event simulation, multiple-scattering correction, and flavour tagging, implemented on IPUs, GPUs CPUs, using variety neural network architectures hyperparameters. Additionally, Kálmán filter track reconstruction IPUs GPUs. results indicate that hold considerable...
A method for determining the q 2 dependent $$ {\overline{K}}^{\ast 0} spin amplitudes of {\overline{B}}^0\to 0}{\mu}^{+}{\mu}^{-} decays through a maximum likelihood fit to data is presented. While current experimental techniques extract limited set observables in bins 2, our approach allows determination all observable quantities as continuous distributions 2. By doing this, eliminates need correct theory predictions these averaging effects, thus increasing sensitivity effects physics...
A bstract In this paper we present a detailed study of the four-body decay B 0 → K + π − ℓ , where tensions with Standard Model predictions have been observed. Our analysis P- and S-wave contributions to system develops complete understanding symmetries distribution, in case massless massive leptons. both cases, determine relations between observables distribution. This enables us define set accessible experiments, including several that not previously identified. The new arise when rate is...
The SoLid experiment has been designed to search for an oscillation pattern induced by a light sterile neutrino state, utilising the BR2 reactor of SCK⋅CEN, in Belgium. detector leverages new hybrid technology, two distinct scintillators cubic array, creating highly segmented volume. A combination 5 cm polyvinyltoluene cells, with 6LiF:ZnS(Ag) sheets on faces each cube, facilitate reconstruction signals. Whilst high granularity provides powerful toolset discriminate backgrounds; itself...
The flavour anomalies are a set of experimental deviations from the Standard Model (SM) predictions in several observables involving decays bottom quarks. In particular, tensions between theory and experiment measurements quark decaying into strange pair muons have motivated much theoretical work to explore possible new physics explanations. This review summarises tumultuous evolution these tensions, focusing on most recent results their implications for beyond SM. We also discuss prospects...
The SoLid experiment is a very-short-baseline aimed at searching for nuclear-reactor-produced active-to-sterile antineutrino oscillations. detection principle based on the pairing of two types solid scintillators: polyvinyl toluene and 6LiF:ZnS(Ag), which new technology used in this field Physics. In addition to good neutron-gamma discrimination, setup allows detector be highly segmented (the basic unit 5 cm side cube). High segmentation provides numerous advantages, including precise...
Abstract This paper presents the first study of Graphcore’s Intelligence Processing Unit (IPU) in context particle physics applications. The IPU is a new type processor optimised for machine learning. Comparisons are made neural-network-based event simulation, multiple-scattering correction, and flavour tagging, implemented on IPUs, GPUs CPUs, using variety neural network architectures hyperparameters. Additionally, Kálmán filter track reconstruction IPUs GPUs. results indicate that hold...