A. S. Chisholm
A5035476683- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Nuclear Physics and Applications
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Advanced Data Storage Technologies
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Particle Accelerators and Free-Electron Lasers
- CCD and CMOS Imaging Sensors
- Big Data Technologies and Applications
- Advanced NMR Techniques and Applications
University of Birmingham
2015-2025
Institute of Science and Technology
2023-2024
Institute for High Energy Physics
2023-2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
European Organization for Nuclear Research
2017-2023
The University of Adelaide
2017-2023
Istanbul University
2023
Royal Holloway University of London
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2020-2023
This report comprises the outcome of five working groups that have studied physics potential high-luminosity phase LHC (HL-LHC) and perspectives for a possible future high-energy (HE-LHC).The covered broad range topics: Standard Model measurements, studies properties ofthe Higgs boson, searches phenomena beyond Model, flavor heavy quarks leptonsand QCD matter at high density temperature.The work is prepared as an input to ongoing process updating European Strategy Particle Physics,a will be...
Abstract The ATLAS experiment is constructing new all-silicon inner tracking system for HL-LHC. strip detectors cover the radial extent of 40 to 100 cm. A approach adopted use p-type silicon material, making readout in n + -strips, so-called -in-p sensors. This allows enhanced radiation tolerance against an order magnitude higher particle fluence compared LHC. To cope with varying hit rates and occupancies as a function distance, there are two barrel sensor types, short strips (SS) 2 long...
The tensor polarization ${t}_{20}$ of ${\ensuremath{\pi}}^{+}\ensuremath{-}d$ elastic scattering has been measured at 120 and 138 MeV as a function angle. While the higher energy strong oscillatory behavior prevails over angular range (105\ifmmode^\circ\else\textdegree\fi{}-180\ifmmode^\circ\else\textdegree\fi{} c.m.), considerable flattening is observed lower 140\ifmmode^\circ\else\textdegree\fi{}-170\ifmmode^\circ\else\textdegree\fi{} c.m. This dependence other observations are believed to...
The angular distribution of the tensor polarization ${t}_{20}$ in $\ensuremath{\pi}\ensuremath{-}{d}_{\mathrm{pol}}$ elastic scattering has been measured backward region at an incident pion energy 138 MeV. Large oscillations have found which are disagreement with all theoretical calculations even when effects presently suggested dibaryon resonances assumed standard parameters explicitly included.
Abstract Silicon detector technologies are often employed for high energy particle physics applications due to their excellent radiation hardness. Radiation damage in the form of bulk or substrate is dependent on incident species and energy. The fluence therefore quoted as 1 MeV neutron equivalent fluence, with hardness factors being scaling quantity. factor can be determined by analysing change leakage current silicon pad diodes post-irradiation. Using MC40 cyclotron facility at University...
The tensor polarisation t20 of the recoil deuterons from pi + -d elastic scattering has been measured between Tpi =110 and 150 MeV. An excitation curve shows a clear peak near mass 2.14 GeV with structure 20 MeV wide. angular distributions at 117, 134 151 confirm rapidly changing behaviour energy. A phase-shift analysis all data in this energy range performed. strong dependence are believed to manifest evidence for non-conventional dynamics.
The absolute total cross section for the $^{4}\mathrm{He}$(\ensuremath{\gamma},p${)}^{3}$H reaction has been measured in \ensuremath{\gamma}-ray energy region between 28.6 and 58.1 MeV with a monochromatic photon beam nearly 4\ensuremath{\pi} proton detector. comparison of our results most recent data on $^{4}\mathrm{He}$(\ensuremath{\gamma},n${)}^{3}$He provides mean value...
Operational experience with the recently upgraded irradiation facility at University of Birmingham is presented. This based around high intensity area MC40 medical cyclotron providing proton energies between 3 and 38 MeV currents ranging from tens fA to A. Accurate dosimetry for displacement damage total ionizing dose, using a combination techniques, offered. Irradiations are carried out in temperature controlled chamber that can be scanned through beam, possibility devices biased, clocked,...
Background modelling is one of the main challenges in particle physics data analysis. Commonly employed strategies include use simulated events background processes, and fitting parametric models to observed data. However, reliable simulations are not always available or may be extremely costly produce. As a result, many cases, uncertainties associated with accuracy sample size simulation limiting factor analysis sensitivity. At same time, limited by priori unknown functional form parameter...
Abstract The successful pre-production delivery of strip sensors for the new Inner Tracker (ITk) upgraded ATLAS detector at High Luminosity LHC (HL-LHC) CERN was completed and based on their performance full production has commenced. overall period is anticipated to last 4 years complete approximately 22000 required ITk. For Quality Assurance (QA), a number test structures designed by collaboration, along with large area diode miniature version main sensor, are produced in every wafer...
We evaluate the LHC’s potential of observing Higgs boson decays into light elementary or composite resonances through their hadronic decay channels. focus on production processes with largest cross sections, $$pp \rightarrow h$$ and h+\mathrm {jet}$$ , subsequent $$h ZA$$ Z\,\eta _c$$ comment process hZ$$ . By exploiting track-based jet substructure observables extrapolating to $$3000~\mathrm {fb}^{-1}$$ we find $$\mathcal{BR}(h ZA) \simeq \mathcal{BR}(h Z \eta _c) \lesssim 0.02$$ at 95 %...
Abstract The production of strip sensors within the framework ATLAS Inner Tracker (ITk) development is a process which requires continuous evaluation during full period (about 4 years). Such an divided into two different parts: Quality Control (QC), focuses on final product (the actual sensors) and tries to identify possible defects once fabrication completed, Assurance (QA), aims prevent deviations in manufacturing uses specifically-designed test structures. initial sensor pre-production...
In order to search for isospin-2 dibaryons and study the inelastic nucleon-nucleon channels producing at least two pions, differential cross sections analyzing powers have been measured p(p\ensuremath{\rightarrow},${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$)X reaction with polarized proton beams of 1.45, 2.1, 2.7 GeV. The pions were detected an angle 13.8\ifmmode^\circ\else\textdegree\fi{} by SPESIII spectrometer located Laboratoire National Saturne. No statistically significant...