C. Buchanan
A5113119995- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Amino Acid Enzymes and Metabolism
- Advanced Radiotherapy Techniques
- Lanthanide and Transition Metal Complexes
- Particle accelerators and beam dynamics
- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Stochastic processes and financial applications
- Crystallization and Solubility Studies
- Radioactive Decay and Measurement Techniques
- CCD and CMOS Imaging Sensors
University of Tennessee at Knoxville
2024
Bangor University
2024
Wayne State College
2024
Siemens (United States)
2015
University of California, Los Angeles
2002-2014
Campbell Collaboration
2009
University of Edinburgh
2006
University of California, Riverside
2005
Laboratoire d’Annecy de Physique des Particules
2002-2004
Jet Propulsion Laboratory
2002
We present a study of the decays B0,+→J/ψωK0,+ using 383×106 B¯¯¯B events obtained with BABAR detector at PEP-II. observe Y(3940)→J/ψω, mass 3914.6+3.8−3.4(stat)±2.0(syst) MeV/c2, and width 34+12−8(stat)±5(syst) MeV. The ratio B0 B+ decay to YK is 0.27+0.28−0.23(stat)+0.04−0.01(syst), relevant branching fractions are reported.Received 14 November 2007DOI:https://doi.org/10.1103/PhysRevLett.101.082001©2008 American Physical Society
We present updated measurements of time-dependent $CP$ asymmetries in fully reconstructed neutral $B$ decays containing a charmonium meson. The reported here use data sample $(465\ifmmode\pm\else\textpm\fi{}5)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\mathit{\ensuremath{\Upsilon}}(4S)\ensuremath{\rightarrow}B\overline{B}$ collected with the BABAR detector at PEP-II asymmetric energy ${e}^{+}{e}^{\ensuremath{-}}$ storage rings operating SLAC National Accelerator Laboratory. asymmetry...
In a study of ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}{K}^{+}$ decays, we find evidence for the radiative decay $X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}$ with statistical significance $3.4\ensuremath{\sigma}$. We measure product branching fractions...
A search for charmonium and other new states is performed in a study of exclusive initial-state-radiation production $D\overline{D}$ events from electron-positron annihilations at center-of-mass energy 10.58 GeV. The data sample corresponds to an integrated luminosity $384\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ was recorded by the BABAR experiment PEP-II storage ring. mass spectrum shows clear evidence $\ensuremath{\psi}(3770)$ plus structures near 3.9, 4.1, $4.4\text{...
We have observed the ${\ensuremath{\psi}}^{\ensuremath{'}\ensuremath{'}}$ resonance in cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ at ${E}_{\mathrm{c}.\mathrm{m}.}=3770\ifmmode\pm\else\textpm\fi{}6.0$ MeV, of total width $\ensuremath{\Gamma}=24\ifmmode\pm\else\textpm\fi{}5$ MeV and partial to electron pairs ${\ensuremath{\Gamma}}_{\mathrm{ee}}=180\ifmmode\pm\else\textpm\fi{}60$ eV. The hadronic events which contain anomalous provides both...
Semileptonic $\overline{B}$ decays to $DX\ensuremath{\ell}\overline{\ensuremath{\nu}}$ ($\ensuremath{\ell}=e$ or $\ensuremath{\mu}$) are selected by reconstructing ${D}^{0}\ensuremath{\ell}$ and ${D}^{+}\ensuremath{\ell}$ combinations from a sample of $230\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4S)\ensuremath{\rightarrow}B\overline{B}$ recorded with the BABAR detector at PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ collider SLAC. A global fit these samples in...
Inclusive production cross sections of $\pi^\pm$, $K^\pm$ and $p\bar{p}$ per hadronic $e^+e^-$ annihilation event in are measured at a center-of-mass energy 10.54 GeV, using relatively small sample very high quality data from the BaBar experiment PEP-II $B$-factory SLAC National Accelerator Laboratory. The drift chamber Cherenkov detector provide clean samples identified over wide range momenta. Since is below threshold to produce $B\bar{B}$ pair, with $B$ bottom-quark meson, these represent...
We report the results of a search for T, CP and CPT violation in B0-B0bar mixing using an inclusive dilepton sample collected by BaBar experiment at PEP-II B Factory. Using 232 million BBbar pairs, with simultaneous likelihood fit same-sign opposite-sign dileptons, we measure T parameter |q/p|-1 = (-0.8 +/- 2.7(stat.) 1.9(syst.))e-03, parameters Im(z) (-13.9 7.3 (stat.) 3.2(syst.))e-03 DeltaGamma x Re(z) (-7.1 3.9(stat.) 2.0(syst.))e-03 ps^{-1}. The statistical correlation between...
We present a search for the decay ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}\ensuremath{\nu}$ using $383\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at $\ensuremath{\Upsilon}(4S)$ resonance with BABAR detector SLAC PEP-II $B$ Factory. select sample of events one completely reconstructed tag in hadronic mode (${B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{(*)0}{X}^{\ensuremath{-}}$), and examine rest event to decay. identify $\ensuremath{\tau}$...
We present results from an analysis of ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{+}{\ensuremath{\rho}}^{\ensuremath{-}}$ decays using $(383.6\ifmmode\pm\else\textpm\fi{}4.2)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected by the BABAR detector at PEP-II asymmetric-energy $B$ factory SLAC. The measurements branching fraction, longitudinal polarization fraction ${f}_{L}$, and $CP$-violating parameters ${S}_{\mathrm{long}}$ ${C}_{\mathrm{long}}$ are as...
Abstract Optimization of the development unconventional resources is a continuous process, with each iteration providing incremental progress. The objective this work to describe journey from field test design, data acquisition, execution, evaluation, and modeling provide guidance for decision-making show how improving understanding an asset translates into practical enhancements its development. case study involves two "high density" pads in Marcellus, utilizing chemical tracers,...
We report observations of the $b\ensuremath{\rightarrow}d$ penguin-dominated decays ${B}^{+}\ensuremath{\rightarrow}{\overline{K}}^{0}{K}^{+}$ and ${B}^{0}\ensuremath{\rightarrow}{K}^{0}{\overline{K}}^{0}$ in $316\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ ${e}^{+}{e}^{\ensuremath{-}}$ collision data collected with BABAR detector. measure branching fractions...
A study of the ${D}_{sJ}^{*}(2317{)}^{+}$ and ${D}_{sJ}(2460{)}^{+}$ mesons in inclusive $c\overline{c}$ production is presented using $232\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data collected by BABAR experiment near $\sqrt{s}=10.6\text{ }\mathrm{GeV}$. Final states consisting a ${D}_{s}^{+}$ meson along with one or more ${\ensuremath{\pi}}^{0}$, ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $\ensuremath{\gamma}$ particles are considered. Estimates mass limits on width...
We present measurements of the branching fractions and charge asymmetries (where appropriate) two-body B decays to ${\ensuremath{\eta}}^{(\ensuremath{'})}{K}^{*},$ ${\ensuremath{\eta}}^{(\ensuremath{'})}\ensuremath{\rho},$ ${\ensuremath{\eta}}^{(\ensuremath{'})}{\ensuremath{\pi}}^{0},$ $\ensuremath{\omega}{\ensuremath{\pi}}^{0},$ $\ensuremath{\varphi}{\ensuremath{\pi}}^{0}.$ The data were recorded with BABAR detector at PEP-II correspond $89\ifmmode\times\else\texttimes\fi{}{10}^{6}$...
We report searches for B-meson decays to the charmless final states ρK∗ and f0(980)K∗ with a sample of 232×106 B¯¯¯B pairs collected BABAR detector at PEP-II e+e− collider. measure in units 10−6 following branching fractions, where first error quoted is statistical second systematic, or upper limits are given 90% confidence level : B(B+→ρ0K*+)<6.1, B(B+→ρ+K*0)=9.6±1.7±1.5, B(B0→ρ−K*+)<12.0, B(B0→ρ0K*0)=5.6±0.9±1.3, B(B+→f0(980)K*+)=5.2±1.2±0.5, B(B0→f0(980)K*0)<4.3. For significant modes, we...
We present measurements of the branching fractions for charmless two-body decays $\Bz\to\pip\pim$ and $\Bz\to\Kp\pim$, a search decay $\Bz\to\Kp\Km$. include effects final-state radiation from daughter mesons first time, quote inclusive processes $\Bz\to h^+ h^{\prime -} n\gamma$, where $h$ $h^\prime$ are pions or kaons. The maximum value sum energies $n$ undetected photons, $E_\gamma^{\rm max}$, is mode-dependent. Using data sample approximately 227 million \upsbb collected with \babar\...
A search for lepton flavor violating decays of a τ to lighter-mass charged and an ω vector meson is performed using 384.1 fb−1 e+e− annihilation data collected with the BABAR detector at Stanford Linear Accelerator Center PEP-II storage ring. No signal found, upper limits on branching ratios are determined be B(τ±→e±ω)<1.1×10−7 B(τ±→μ±ω)<1.0×10−7 90% confidence level.Received 6 November 2007DOI:https://doi.org/10.1103/PhysRevLett.100.071802©2008 American Physical Society
We present measurements of the B --> eta(')K branching fractions; for B(+) eta(')K(+) we measure also time-integrated charge asymmetry Alpha(ch), and B(0) eta(')K(0)(S) time-dependent CP-violation parameters S C. The data sample corresponds to 232 x 10(6) BB pairs produced by e(+)e(-) annihilation at Upsilon (4S). results are Beta(B eta(')K(+)) = (68.9 +/- 2.0 3.2) 10(-6), Beta(B(0) eta(')K(0)) (67.4 Alpha(ch) 0.033 0.028 0.005, 0.30 0.140 0.02, C -0.21 0.10 where first error quoted is...
We present a preliminary measurement of the resonance parameters Υ (10580) with BABAR detector at SLAC PEP-II asymmetric B factory.We measure total width Γ tot to be (20.7 ± 1.6 2.5) MeV, partial electronic ee = (0.321 0.017 0.029) keV and mass M (10.5793± 0.0004 0.0012) GeV/c 2 .
Using 385 fb−1 of e+e− collisions, we study the amplitudes singly Cabibbo-suppressed decay D0→K−K+π0. We measure strong phase difference between ¯¯¯D0 and D0 decays to K∗(892)+K− be −35.5°±1.9°(stat)±2.2°(syst), their amplitude ratio 0.599±0.013(stat)±0.011(syst). observe contributions from Kπ K−K+ scalar vector amplitudes, analyze angular moments. find no evidence for charged κ, nor higher spin states. also perform a partial-wave analysis system in limited mass range.Received 26 April...
ABSTRACT This study explores the dynamic and hierarchical structural organization of peptide coacervate microdroplets at meso-to atomic-scale resolution using a combination Transferred Nuclear Overhauser Effect Spectroscopy (TrNOESY), Small Angle Neutron Scattering (SANS), confocal microscopy. Dynamic interactions driving self-association clusters are revealed, highlighting critical roles interacting residues. These phase-separating model peptides form small oligomers low pH, which aggregate...
We measure the time-dependent $CP$ asymmetry parameters in ${B}^{0}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{K}^{0}$ based on a data sample of approximately $227\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B$-meson pairs recorded at $\ensuremath{\Upsilon}(4S)$ resonance with BABAR detector PEP-II Factory SLAC. reconstruct two-body ${B}^{0}$ decays to $\ensuremath{\phi}(1020){K}_{S}^{0}$ and $\ensuremath{\phi}(1020){K}_{L}^{0}$, three-body decay...