D. Hutchcroft

ORCID: 0000-0002-4174-6509
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • High-Energy Particle Collisions Research
  • Neutrino Physics Research
  • Dark Matter and Cosmic Phenomena
  • Particle Detector Development and Performance
  • Computational Physics and Python Applications
  • Black Holes and Theoretical Physics
  • Particle Accelerators and Free-Electron Lasers
  • Medical Imaging Techniques and Applications
  • Atomic and Subatomic Physics Research
  • Superconducting Materials and Applications
  • Nuclear physics research studies
  • Cosmology and Gravitation Theories
  • Radiation Detection and Scintillator Technologies
  • Stochastic processes and statistical mechanics
  • Distributed and Parallel Computing Systems
  • Astrophysics and Cosmic Phenomena
  • Advanced Data Storage Technologies
  • Particle accelerators and beam dynamics
  • International Science and Diplomacy
  • Advanced NMR Techniques and Applications
  • Cold Atom Physics and Bose-Einstein Condensates
  • Radioactive Decay and Measurement Techniques
  • Radiation Therapy and Dosimetry

University of Liverpool
2016-2025

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024

Centre National de la Recherche Scientifique
2011-2024

Roma Tre University
2024

Aix-Marseille Université
2011-2024

University of Padua
2023

UCLouvain
2004-2023

Imperial College London
2014-2023

Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2022

University of Glasgow
2014-2021

The Vertex Locator (VELO) is a silicon microstrip detector that surrounds the proton-proton interaction region in LHCb experiment. performance of during first years its physics operation reviewed. system operated vacuum, uses bi-phase CO2 cooling system, and sensors are moved to 7 mm from LHC beam for data taking. stability these characteristic features described, details material budget given. calibration timing processing algorithms implemented FPGAs described. fully characterised. have...

10.1088/1748-0221/9/09/p09007 article EN cc-by Journal of Instrumentation 2014-09-09

We search for single-photon events in 53 fb−1 of e+e− collision data collected with the BABAR detector at PEP-II B-Factory. look a single high-energy photon and large missing momentum energy, consistent production spin-1 particle A′ through process e+e−→γA′; A′→invisible. Such particles, referred to as "dark photons," are motivated by theories applying U(1) gauge symmetry dark matter. find no evidence such processes set 90% confidence level upper limits on coupling strength mass range mA′≤8...

10.1103/physrevlett.119.131804 article EN publisher-specific-oa Physical Review Letters 2017-09-28

Many models of physics beyond the Standard Model predict existence new Abelian forces with gauge bosons mediating interactions between "dark sectors" and Model. We report a search for dark boson Z' coupling only to second third generations leptons in reaction e+e- -> mu+mu- Z', using 514 fb-1 data collected by BABAR experiment. No significant signal is observed masses range 0.212 - 10 GeV. Limits on parameter g' as low 7x10^-4 are derived, leading improvements bounds compared those...

10.1103/physrevd.94.011102 article EN publisher-specific-oa Physical review. D/Physical review. D. 2016-07-19

We search for the rare flavor-changing neutral current process $B^{+}\rightarrow K^{+}τ^{+}τ^{-}$ using data from BABAR experiment. The sample, collected at center-of-mass energy of $Υ{(4S)}$ resonance, corresponds to a total integrated luminosity 424 fb$^{-1}$ and 471 million $B\overline{B}$ pairs. reconstruct one $B$ meson, produced in $Υ{(4S)}\rightarrow B^{+} B^{-}$ decay, many hadronic decay modes activity compatible with K^{+} τ^{+}τ^{-}$ rest event. Each $τ$ lepton is required...

10.1103/physrevlett.118.031802 article EN publisher-specific-oa Physical Review Letters 2017-01-20

The NA62 experiment at CERN SPS is designed to study the $K^+\to\pi^+\nu\bar\nu$ decay. After collecting data in 2016, 2017, and 2018, has resumed taking 2021 received approval for operations until onset of LS3. first search lepton number violating decay $K^+\to\pi^0\pi^-\mu^+ e^+$ flavour decays $K^+\to\pi^0\pi^+\mu^+ e^-$ , $K^+\to\pi^0\pi^+\mu^- reported. More recent results from analyses $K^+\to\pi^+\gamma\gamma$ $\pi^0\to e^+e^-$ are also Additionally, New Physics collected during...

10.22323/1.465.0222 article EN cc-by-nc-nd 2025-02-07

An angular analysis of the decay ${\overline{B} \rightarrow D^\ast \ell^- \overline{\nu}_\ell}$, $\ell\in\{e,\mu\}$, is reported using full $e^+e^-$ collision data set collected by \babar experiment at $\Upsilon(4S)$ resonance. One $B$ meson from ${\Upsilon(4S)\to B\overline{B}}$ fully reconstructed in a hadronic mode, which constrains kinematics and provides determination neutrino momentum vector. The semileptonic described di-lepton mass squared, $q^2$, three angles. first unbinned fit to...

10.1103/physrevlett.123.091801 article EN cc-by Physical Review Letters 2019-08-29

The final results of the ALEPH search for Standart Model Higgs boson at LEP, with data collected in year 2000 center-of-mass energies up to 209 GeV, are presented. changes respect preceding publication described and a complete study systematic effects is reported. findings this analysis confirm preliminary published November shortly after closing down LEP collider: significant excess events observed, consistent production 115 GeV/c2 Standard boson. searches neutral bosons od MSSM also...

10.1016/s0370-2693(01)01487-3 article EN cc-by Physics Letters B 2002-02-01

A search for the production and non-standard decay of a Higgs boson, h, into four taus through intermediate pseudoscalars, a, is conducted on 683 pb−1 data collected by ALEPH experiment at centre-of-mass energies from 183 to 209 GeV. No excess events above background observed, exclusion limits are placed combined cross section times branching ratio, $ {\xi^2} = \frac{{\sigma \left( {{\text{e}^{+} }{\text{e}^{-} } \to {\text{Zh}}} \right)}}{{{\sigma_{\text{SM}}}\left( \right)}} \times B\left(...

10.1007/jhep05(2010)049 article EN cc-by-nc Journal of High Energy Physics 2010-05-01

We study the process $e^+e^- \to \pi^+\pi^-\eta \gamma$, where photon is radiated from initial state. About 8000 fully reconstructed events of this are selected BaBar data sample with an integrated luminosity 469~fb$^{-1}$. Using $\pi^+\pi^-\eta$ invariant mass spectrum we measure \pi^+\pi^-\eta$ cross section in $e^+e^-$ center-of-mass energy range 1.15 to 3.5 GeV. The well described by Vector-Meson Dominance model four $\rho$-like states. observe $49\pm9$ $J/\psi$ decay $\pi^+\pi^-\eta$,...

10.1103/physrevd.97.052007 article EN cc-by Physical review. D/Physical review. D. 2018-03-21

A study of the two-body decays B^{±}→X_{cc[over ¯]}K^{±}, where X_{cc[over ¯]} refers to one charmonium state, is reported by BABAR Collaboration using a data sample 424 fb^{-1}. The absolute determination branching fractions for these are significantly improved compared previous measurements. Evidence found decay B^{+}→X(3872)K^{+} at 3σ level. fraction B[B^{+}→X(3872)K^{+}]=[2.1±0.6(stat)±0.3(syst)]×10^{-4} measured first time. It follows that B[X(3872)→J/ψπ^{+}π^{-}]=(4.1±1.3)%,...

10.1103/physrevlett.124.152001 article EN cc-by Physical Review Letters 2020-04-16

We study the processes $\gamma \gamma \to \eta_c \eta' K^+ K^-$, $\eta' \pi^+ \pi^-$, and $\eta \pi^-$ using a data sample of 519 $fb^{-1}$ recorded with BaBar detector operating at SLAC PEP-II asymmetric-energy $e^+e^-$ collider center-of-mass energies near $\Upsilon(nS)$ ($n = 2,3,4$) resonances. This is first observation decay $\eta_c K^-$ we measure branching fraction $\Gamma(\eta_c K^-)/(\Gamma(\eta_c \pi^-)=0.644\pm 0.039_{\rm stat}\pm 0.032_{\rm sys}$. Significant interference...

10.1103/physrevd.104.072002 article EN cc-by Physical review. D/Physical review. D. 2021-10-07

A dedicated measurement of additional radiation in e+e−→μ+μ−γ and e+e−→π+π−γ initial-state-radiation events is presented using the full BABAR data sample. For first time results are at next-to- next-to-next-to-leading order, with one two photons, respectively, for from initial final states. Comparison predictions phokhara afkqed Monte Carlo generators performed, revealing discrepancies one-photon rates angular distributions former. This disagreement has a negligible effect on e+e−→π+π−(γ)...

10.1103/physrevd.108.l111103 article EN cc-by Physical review. D/Physical review. D. 2023-12-21
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