P. J. Clark

ORCID: 0000-0002-3777-0880
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Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Particle Detector Development and Performance
  • Quantum Chromodynamics and Particle Interactions
  • Dark Matter and Cosmic Phenomena
  • Computational Physics and Python Applications
  • Neutrino Physics Research
  • Cosmology and Gravitation Theories
  • Distributed and Parallel Computing Systems
  • Medical Imaging Techniques and Applications
  • Particle Accelerators and Free-Electron Lasers
  • Black Holes and Theoretical Physics
  • Superconducting Materials and Applications
  • Atomic and Subatomic Physics Research
  • Radiation Detection and Scintillator Technologies
  • Astrophysics and Cosmic Phenomena
  • Advanced Data Storage Technologies
  • advanced mathematical theories
  • Scientific Computing and Data Management
  • Fluid Dynamics and Turbulent Flows
  • Nuclear physics research studies
  • Wind and Air Flow Studies
  • Grief, Bereavement, and Mental Health
  • Aerodynamics and Fluid Dynamics Research
  • Gender, Labor, and Family Dynamics

University of Edinburgh
2016-2025

The University of Adelaide
2013-2023

Drexel University
2020-2022

Columbia University
2019-2020

iThemba Laboratory
2020

Memorial Sloan Kettering Cancer Center
2020

University of Science and Technology of China
2015-2016

Campbell Collaboration
2001-2013

Fachhochschule Wiener Neustadt
2012

European Organization for Nuclear Research
2010-2012

We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at PEP-II asymmetric Factory SLAC. This result uses additional sample Upsilon(4S) collected 2001, bringing data available to 32 x 10(6) BB macro pairs. select events which one meson is fully reconstructed a final state containing charmonium and flavor other determined from its decay products. The amplitude asymmetry, standard model proportional sin2 beta, derived time...

10.1103/physrevlett.87.091801 article EN Physical Review Letters 2001-08-14

The production of J/psi mesons in proton-proton collisions at sqrt(s)=7 TeV is studied with the LHCb detector LHC. differential cross-section for prompt measured as a function transverse momentum pT and rapidity y fiducial region 0<pT<14 GeV/c 2.0<y<4.5. fraction from b-hadron decays are also same ranges. analysis based on data sample corresponding to an integrated luminosity 5.2pb-1. cross-sections over 10.52 +/- 0.04 1.40 +1.64/-2.20 mub 1.14 0.01 0.16 decays, where first uncertainty...

10.1140/epjc/s10052-011-1645-y article EN cc-by-nc The European Physical Journal C 2011-05-01

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced violation B_s system. fit pi+ pi- mass spectrum interfering resonances gives R_{f0/phi} = [Gamma(Bs f0, f0 pi-)]/[Gamma(Bs phi, phi K+K-)] 0.252^{+0.046+0.027}_{-0.032-0.033}, where uncertainties are statistical and systematic, respectively.

10.1016/j.physletb.2011.03.006 article EN cc-by-nc-nd Physics Letters B 2011-03-07

This paper presents a summary of beam-induced backgrounds observed in the ATLAS detector and discusses methods to tag remove background contaminated events data. Trigger-rate based monitoring beam-related is presented. The correlations with machine conditions, such as residual pressure beam-pipe, are discussed. Results from dedicated beam-background simulations shown, their qualitative agreement data evaluated. Data taken during passage unpaired, i.e. non-colliding, proton bunches used...

10.1088/1748-0221/8/07/p07004 article EN Journal of Instrumentation 2013-07-17

10.1126/science.123.3192.373 article EN Science 1956-03-02

AS a measure of the divergence existing between two populations with respect to some given character, Klauber (1940) has suggested that difference means be divided by average means. This advantage it is independent units in which character recorded. The definition provided subjective, extent other definitions term can easily obtained. value this enables amount objectively estimated. Formulas, or definitions, constructed such manner as make objective evaluation possible are much desired...

10.2307/1438532 article EN Copeia 1952-06-26

No AccessJournal of Urology1 Mar 1943Sarcoma the Penis Mark C. Wheelock, and Philip J. Clark WheelockMark Wheelock More articles by this author , ClarkPhilip View All Author Informationhttps://doi.org/10.1016/S0022-5347(17)70575-7AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail © 1943 The American Urological Association Education Research, Inc.FiguresReferencesRelatedDetailsCited ByManivel J Fraley E (2018) Malignant...

10.1016/s0022-5347(17)70575-7 article EN The Journal of Urology 1943-03-01

Radial glia (RG) cells are the first neural stem to appear during embryonic development. Adult human glioblastomas harbor a subpopulation of RG-like with typical RG morphology and markers. The exhibit classic unique mitotic behavior normal in cell-autonomous manner. Single-cell RNA sequencing analyses glioblastoma reveal transcriptionally dynamic clusters that share profiles fetal radial reside quiescent cycling states. Functional assays show role for interleukin triggering exit from...

10.1016/j.stemcr.2020.01.007 article EN cc-by-nc-nd Stem Cell Reports 2020-01-30

We report branching fraction measurements for exclusive decays of charged and neutral B mesons into two-body final states containing a charmonium meson. use sample $22.72\ifmmode\pm\else\textpm\fi{}0.36$ million $B\overline{B}$ events collected between October 1999 2000 with the BABAR detector at PEP-II storage rings Stanford Linear Accelerator Center. The considered here are $J/\ensuremath{\psi},$ $\ensuremath{\psi}(2S),$ ${\ensuremath{\chi}}_{c1},$ light meson in decay is either K,...

10.1103/physrevd.65.032001 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 2002-01-07

We present measurements, based on a sample of approximately 23×106 B¯B pairs, the branching fractions and search for CP-violating charge asymmetries in charmless hadronic decays B mesons into two-body final states kaons pions. find B(B0→π+π−)=(4.1±1.0±0.7)×10−6, B(B0→K+π−)=(16.7±1.6±1.3)×10−6, B(B+→K+π0)=(10.8+2.1−1.9±1.0)×10−6, B(B+→K0π+)=(18.2+3.3−3.0±2.0)×10−6, B(B0→K0π0)=(8.2+3.1−2.7±1.2)×10−6. also report 90% confidence level upper limits meson to π+π0, K+K−, ¯K0K+ states. In addition,...

10.1103/physrevlett.87.151802 article EN Physical Review Letters 2001-09-24

An airfoil in turbulent flow is thought to radiate sound consequence of its fluctuating lift. The instantaneous and lift should be connected by Curle's equation, which describes radiation from a rigid surface contact with flow. It follows that the crosscorrelation related corresponding way autocorrelation. Such correlations were measured present investigation an jet flow, Curle relationship was verified semiquantitatively. predicted comparative shapes correlation curves found; magnitudes...

10.1121/1.1911765 article EN The Journal of the Acoustical Society of America 1969-09-01

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, semileptonic decays Bs -&gt; Ds+ X mu nu and D0 K+ are detected. Two structures observed mass spectrum masses consistent known D^+_{s1}(2536) $D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to total rate B(Bs D_{s2}^{*+} nu)/B(Bs nu)= (3.3\pm 1.0\pm 0.4)%, D_{s1}^+ munu)/B(Bs (5.4\pm 1.2\pm 0.5)%, where first uncertainty is statistical second systematic. This...

10.1016/j.physletb.2011.02.039 article EN cc-by-nc-nd Physics Letters B 2011-02-19

An airfoil in turbulent flow is thought to radiate sound consequence of its fluctuating lift. The instantaneous and lift should be connected by Curle's equation, which describes radiation from a rigid surface contact with flow. It follows that the cross correlation related corresponding way autocorrelation. Such correlations were measured present investigation an jet flow, Curle relationship was verified semiquantitatively. predicted comparative shapes curves found; magnitudes showed 27%...

10.1121/1.1972388 article EN The Journal of the Acoustical Society of America 1969-07-01

We present the results of searches for B decays to charmless two-body final states containing eta(') or omega mesons, based on 20.7 fb(-1) data collected with BABAR detector. find branching fractions Beta(B(+)-->eta(')K(+)) = (70+/-8+/-5) x 10(-6), Beta(B(0)-->eta(')K(0)) (42(+13)(-11) +/- 4) and Beta(B(+)-->omega pi(+)) (6.6(+2.1)(-1.8) 0.7) where first error quoted is statistical second systematic. give measurements four additional modes which 90% confidence level upper limits are...

10.1103/physrevlett.87.221802 article EN Physical Review Letters 2001-11-12

The branching fractions of the exclusive decays ${B}^{0}\ensuremath{\rightarrow}{K}^{*0}\ensuremath{\gamma}$ and ${B}^{+}\ensuremath{\rightarrow}{K}^{*+}\ensuremath{\gamma}$ are measured from a sample $(22.74\ifmmode\pm\else\textpm\fi{}0.36)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ collected with BABAR detector at PEP-II asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. We find...

10.1103/physrevlett.88.101805 article EN Physical Review Letters 2002-02-26

The study of racial differences has resulted in the discovery many measures which may be used to characterize human populations.Although very few these are chemical nature, all genetically controlled ultimately chemical, since primary action genes is chemical.It would seem plausible then expect find measurable among populations such as known exist individuals (Sutton and Vandenberg, '53 ; Berry, '53).'Supported part by a grant from McGregor Fund Detroit.The authors wish cspress their...

10.1002/ajpa.1330130106 article EN American Journal of Physical Anthropology 1955-03-01

We have observed the decays B--> phiK and phiK(*) in a sample of over 45 million B mesons collected with BABAR detector at PEP-II collider. The measured branching fractions are B(B+--> phiK+) = (7.7(+1.6)(-1.4)+/-0.8)x10(-6), B(B0--> phiK0) (8.1(+3.1)(-2.5)+/-0.8)x10(-6), phiK(*+)) (9.7(+4.2)(-3.4)+/-1.7)x10(-6), phiK(*0)) (8.7(+2.5)(-2.1)+/-1.1)x10(-6). also report upper limit phipi(+))<1.4x10(-6) ( 90% C.L.).

10.1103/physrevlett.87.151801 article EN Physical Review Letters 2001-09-21
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