Philip Harris
A5054695990- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Noncommutative and Quantum Gravity Theories
- Advanced MRI Techniques and Applications
- Hydrocarbon exploration and reservoir analysis
- Superconducting Materials and Applications
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Porphyrin and Phthalocyanine Chemistry
- Quantum Mechanics and Applications
- Particle Accelerators and Free-Electron Lasers
- Calibration and Measurement Techniques
University of Sussex
2014-2024
Moscow Institute of Thermal Technology
2023-2024
Massachusetts Institute of Technology
2010-2023
IIT@MIT
2019
European Organization for Nuclear Research
2000-2018
Rutherford Appleton Laboratory
1995-2010
Institut Laue-Langevin
2007-2010
Science and Technology Facilities Council
2010
University of Oxford
2010
Institute for Nuclear Research and Nuclear Energy
2010
An experimental search for an electric dipole moment (EDM) of the neutron has been carried out at Institut Laue-Langevin, Grenoble. Spurious signals from magnetic-field fluctuations were reduced to insignificance by use a cohabiting atomic-mercury magnetometer. Systematic uncertainties, including geometric-phase-induced false EDMs, have carefully studied. The results may be interpreted as upper limit on EDM $|{d}_{n}|<2.9\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}26}e\text{...
This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos Fermilab NuMI beam. The rates and energy spectra of charged current ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ interactions are compared in two detectors located along beam axis at distances 1 735 km. With $1.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ 120 GeV protons incident target, 215 events with energies below 30 observed Far Detector, an expectation $336\ifmmode\pm\else\textpm\fi{}14$...
We present the result of an experiment to measure electric dipole moment (EDM) neutron at Paul Scherrer Institute using Ramsey's method separated oscillating magnetic fields with ultracold neutrons (UCN). Our measurement stands in long history EDM experiments probing physics violating time reversal invariance. The salient features this were use a Hg-199 co-magnetometer and array optically pumped cesium vapor magnetometers cancel correct for field changes. statistical analysis was performed...
We present for the first time a detailed and comprehensive analysis of experimental results that set current world sensitivity limit on magnitude electric dipole moment (EDM) neutron. have extended enhanced our earlier to include recent developments in understanding effects gravity depolarizing ultracold neutrons (UCN); an improved calculation spectrum neutrons; conservative estimates other possible systematic errors, which are also shown be consistent with more measurements undertaken...
The latest neutron electric dipole moment (EDM) experiment has been collecting data at the Institut Laue-Langevin (ILL), Grenoble, since 1996. It uses an atomic-mercury magnetometer to compensate for magnetic field fluctuations that were principal source of systematic errors in previous experiments. first results, combination with ILL measurement, yield a possible range values $(\ensuremath{-}7.0<{d}_{n}<5.0)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}26}e\mathrm{cm}$ ( $90%$...
This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of neutrino flavor mass splitting |Deltam2| = (2.43+/-0.13) x 10(-3) eV2 (68% C.L.) and mixing angle sin2(2theta) > 0.90 (90% C.L.). disfavor two alternative explanations for disappearance in flight: namely, decays into lighter particles quantum decoherence neutrinos, at 3.7 5.7 standard-deviation levels,...
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of spin-precession frequencies stored ultracold neutrons and 199Hg atoms an axion-induced oscillating electric dipole moment neutron axion-wind effect. No signal consistent with is observed axion mass range 10−24≤ma≤10−17 eV. Our null result sets first laboratory constraints coupling to gluons, which improve astrophysical limits up 3 orders magnitude, also improves previous nucleons factor 40.Received 29...
We examine the theoretical motivations for long-lived particle (LLP) signals at LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are common prediction wide range theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, represent natural generic possibility physics beyond SM (BSM). In most cases LLP lifetime can be treated free parameter from $\mu$m scale up to Big Bang Nucleosynthesis limit $\sim 10^7$m....
We report the results of a search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance by Main Injector Neutrino Oscillation Search [D. G. Michael et al. (MINOS), Phys. Rev. Lett. 97, 191801 (2006).]. The experiment uses two detectors separated 734 km to observe beam neutrinos created Neutrinos at facility Fermi National Accelerator Laboratory. data were collected in first 282 days operations and correspond an exposure $1.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target....
The velocity of a ∼3 GeV neutrino beam is measured by comparing detection times at the near and far detectors MINOS experiment, separated 734 km. A total 473 detector events was used to measure (v−c)/c=5.1±2.9×10−5 (at 68% C.L.). By correlating energies 258 charged-current their arrival detector, limit imposed on mass mν<50 MeV/c2 (99% C.L.).Received 4 June 2007DOI:https://doi.org/10.1103/PhysRevD.76.072005©2007 American Physical Society
The energy dependence of the neutrino-iron and antineutrino-iron inclusive charged-current cross sections their ratio have been measured using a high-statistics sample with MINOS Near Detector exposed to NuMI beam from Main Injector at Fermilab. Neutrino antineutrino fluxes were determined low hadronic subsample events. We report measurements neutrino-Fe (antineutrinoFe) section in range 3-50 GeV (5-50 GeV) precision 2-8% (3-9%) which is 2-8%. data set spans region energy, where accurate are...
Adrenocortical scintigraphy was examined as an indicator of therapeutic success in aldosteronomas treated by transcatheter arterial embolization (TAE) with absolute ethanol (AE). <b>Methods:</b> performed 7 days after intravenous injection 37 MBq <sup>131</sup>I-6-β-iodomethy1-19-norcholesterol before and TAE. Complete or incomplete determined periodic measurements the levels plasma aldosterone correlated scintigraphic results. <b>Results:</b> The aldosteronoma visualized a hot nodule nine...
Theories are developed to evaluate Larmor frequency shifts, derived from geometric phases, in experiments measure electric dipole moments (EDM's) of trapped, atoms, molecules, and neutrons. A part these shifts is proportional the applied field can be interpreted falsely as an moment. comparison made between our theoretical predictions for some results recent experiments, which shows agreement within experimental errors 15%. The also demonstrates that trapped particle EDM have reached a...
A search for depletion of the combined flux active neutrino species over a 735 km baseline is reported using neutral-current interaction data recorded by MINOS detectors in NuMI beam. Such not expected according to conventional interpretations oscillation involving three known flavors. would be signature oscillations or decay postulated noninteracting sterile neutrinos, scenarios ruled out existing data. From an exposure 3.18×1020 protons on target which neutrinos energies between ∼500 MeV...
A search for a sidereal modulation in the MINOS near detector neutrino data was performed. If present, this signature could be consequence of Lorentz and CPT violation as predicted by class extensions to Standard Model. No evidence signal set found, implying that there is no significant change propagation depends on direction beam sun-centered inertial frame. Upper limits magnitudes violating terms these Model lie between 0.01-1% maximum expected, assuming suppression signatures factor $10^{-17}$. \
We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such signal would be consequence of Lorentz and CPT violation as described by standard-model extension framework. It also first detection perturbative effect to conventional mass oscillations. found no evidence this signature, upper limits placed on magnitudes violating coefficients describing theory are an improvement factors 20-510 over current best using near detector.
A clock comparison experiment, analyzing the ratio of spin precession frequencies stored ultracold neutrons and 199Hg atoms, is reported. No daily variation this could be found, from which set an upper limit on Lorentz invariance violating cosmic anisotropy field b perpendicular < 2 x 10(-20) eV (95% C.L.). This first for free neutron. result also interpreted as a direct gravitational dipole moment neutron |gn| 0.3 eV/c2 m spin-dependent interaction with Sun. Analyzing Earth, based previous...
The temperature of the upper atmosphere affects height primary cosmic ray interactions and production high-energy muons which can be detected deep underground. MINOS far detector at Soudan MN, USA, has collected over 67 million induced muons. underground muon rate measured a period five years exhibits 4% peak-to-peak seasonal variation is highly correlated with in atmosphere. coefficient, $\alpha_T$, relating changes to atmospheric was found be: $\alpha_T = 0.874 \pm 0.009$ (stat.) $\pm...
This paper reports results from a search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{e}$ transitions by the MINOS experiment based on $7\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons-on-target exposure. Our observation of 54 candidate ${\ensuremath{\nu}}_{e}$ events in far detector with background $49.1\ifmmode\pm\else\textpm\fi{}7.0(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}2.7(\mathrm{syst})$ predicted measurements near requires...
We present the design of a next-generation experiment, n2EDM, currently under construction at ultracold neutron source Paul Scherrer Institute (PSI) with aim carrying out high-precision search for an electric dipole moment neutron. The project builds on experience gained previous apparatus operated PSI until 2017, and is expected to deliver order magnitude better sensitivity provision further substantial improvements. An overview experimental method setup given, requirements are derived, its...