R. E. Mitchell
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View article: Measurement of the total compton scattering cross section between 6.5 and 11 GeV
Measurement of the total compton scattering cross section between 6.5 and 11 GeV Open
The total cross section for Compton scattering off atomic electrons, γ+e→γ′+e′, was measured using photons with energies between 6.5 and 11.1 GeV incident on a 9Be target as part of the PrimEx-eta experiment in Hall D at Jefferson Lab. Thi…
View article: Measurement of spin-density matrix elements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ϕ</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>1020</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mo>→</mml:mo><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msubsup><mml:mi>K</mml:mi><mml:mi>L</mml:mi><mml:mn>0</mml:mn></mml:msubsup></mml:mrow></mml:math> photoproduction with a linearly polarized photon beam at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>8.2</mml:mn><mml:mo>–</mml:mo><mml:mn>8.8</mml:mn><mml:mo> </mml:mo><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Measurement of spin-density matrix elements in photoproduction with a linearly polarized photon beam at Open
We measure the spin-density matrix elements (SDMEs) for the photoproduction of ϕ(1020) off of the proton in its decay to KS0KL0, using 105 pb−1 of data collected with a linearly polarized photon beam using the GlueX experiment. The SDMEs a…
View article: Measurement of spin-density matrix elements in Δ++(1232) photoproduction
Measurement of spin-density matrix elements in Δ++(1232) photoproduction Open
We measure the spin-density matrix elements (SDMEs) of the Δ++(1232) in the photoproduction reaction γp→π−Δ++(1232) with the GlueX experiment in Hall D at Jefferson Lab. The measurement uses a linearly–polarized photon beam with energies f…
View article: First Measurement of $a^0_2(1320)$ Polarized Photoproduction Cross Section
First Measurement of $a^0_2(1320)$ Polarized Photoproduction Cross Section Open
We measure for the first time the differential photoproduction cross section $dσ/dt$ of the $a_2(1320)$ meson at an average photon beam energy of 8.5~GeV, using data with an integrated luminosity of 104~pb$^{-1}$ collected by the GlueX exp…
View article: The Narrative Fragmentation of International Legal History
The Narrative Fragmentation of International Legal History Open
View article: Upper Limit on the Photoproduction Cross Section of the Spin-Exotic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>1600</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>
Upper Limit on the Photoproduction Cross Section of the Spin-Exotic Open
The spin-exotic hybrid meson π_{1}(1600) is predicted to have a large decay rate to the ωππ final state. Using 76.6 pb^{-1} of data collected with the GlueX detector, we measure the cross sections for the reactions γp→ωπ^{+}π^{-}p, γp→ωπ^{…
View article: Review of Particle Physics
Review of Particle Physics Open
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs bos…
View article: Upper Limit on the Photoproduction Cross Section of the Spin-Exotic $π_1(1600)$
Upper Limit on the Photoproduction Cross Section of the Spin-Exotic $π_1(1600)$ Open
The spin-exotic hybrid meson $π_{1}(1600)$ is predicted to have a large decay rate to the $ωππ$ final state. Using 76.6~pb$^{-1}$ of data collected with the GlueX detector, we measure the cross sections for the reactions $γp \to ωπ^+ π^- p…
View article: Poles and poltergeists in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>D</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:math> data
Poles and poltergeists in data Open
A recent report of e+e−→DD¯ events by the BESIII collaboration suggests the presence of a structure R at 3900 MeV. We argue that this structure, called G(3900) in the past, is not in fact due to a new cc¯ resonance but rather naturally eme…
View article: Poles and Poltergeists in $e^+ e^- \to D \bar D$ Data
Poles and Poltergeists in $e^+ e^- \to D \bar D$ Data Open
A recent report of $e^+ e^- \to D\bar D$ events by the BESIII Collaboration suggests the presence of a structure $R$ at 3900~MeV\@. We argue that this structure, called $G(3900)$ in the past, is not in fact due to a new $c\bar c$ resonance…
View article: 50 Years of quantum chromodynamics
50 Years of quantum chromodynamics Open
Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be described by a local SU(3) gauge symmetry with charges called “color quantum numbers”, is reviewed; the goal of this review is to provide advanced Ph.D. stu…
View article: Measurement of spin-density matrix elements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ρ</mml:mi><mml:mo>(</mml:mo><mml:mn>770</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> production with a linearly polarized photon beam at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>8.2</mml:mn><mml:mo>–</mml:mo><mml:mn>8.8</mml:mn><mml:mo> </mml:mo><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Measurement of spin-density matrix elements in production with a linearly polarized photon beam at Open
The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized 8.5 GeV photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neutral partic…
View article: New hadrons discovered at BESIII
New hadrons discovered at BESIII Open
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>K</mml:mi></mml:mrow></mml:math>-matrix analysis of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> annihilation in the bottomonium region
-matrix analysis of annihilation in the bottomonium region Open
We perform the first global and unitary analysis of e+e– → $b\\bar{b}$ cross sections. We analyze exclusive cross sections in the $B\\bar{B}, B^{*}\\bar{B}$(+c.c.), $B^{*}\\bar{B}^{*}, B^{*}_{s}\\bar{B}^{*}_{s}$, Υ(nS…
View article: Measurements of Xi(c)+ branching ratios
Measurements of Xi(c)+ branching ratios Open
Using data collected by the fixed target Fermilab experiment FOCUS, we measure the branching ratios of the Cabibbo favored decays $\\Xi_c^+ \\to \\Sigma^+K^-\\pi^+$, $\\Xi_c^+ \\to \\Sigma^+ \\bar{K}^{*}(892)^0$, and $\\Xi_c^+ \\to \\Lambd…
View article: MMAP-05 PHASE I STUDY OF CONCURRENT PAXALISIB AND RADIATION THERAPY IN PATIENTS WITH SOLID TUMOR BRAIN METASTASES OR LEPTOMENINGEAL METASTASES HARBORING PI3K PATHWAY MUTATIONS: RESULTS FROM THE DOSE-ESCALATION COHORT
MMAP-05 PHASE I STUDY OF CONCURRENT PAXALISIB AND RADIATION THERAPY IN PATIENTS WITH SOLID TUMOR BRAIN METASTASES OR LEPTOMENINGEAL METASTASES HARBORING PI3K PATHWAY MUTATIONS: RESULTS FROM THE DOSE-ESCALATION COHORT Open
INTRODUCTION Radiation therapy (RT) is an effective treatment for patients with central nervous system metastases, but disease control is poor in patients with tumors that harbor PI3K pathway alterations. We hypothesized that combining RT …
View article: Search for photoproduction of axionlike particles at GlueX
Search for photoproduction of axionlike particles at GlueX Open
We present a search for axion-like particles, $a$, produced in photon-proton collisions at a center-of-mass energy of approximately 4 GeV, focusing on the scenario where the $a$-gluon coupling is dominant. The search uses $a\\to\\gamma\\ga…
View article: Measurement of spin density matrix elements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo>(</mml:mo><mml:mn>1520</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> photoproduction at 8.2–8.8 GeV
Measurement of spin density matrix elements in photoproduction at 8.2–8.8 GeV Open
We report on the measurement of spin density matrix elements of the Λ(1520) in the photoproduction reaction γp→Λ(1520)K+, via its subsequent decay to K-p. The measurement was performed as part of the GlueX experimental program in Hall D at…
View article: Measurement of beam asymmetry for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi mathvariant="normal">Δ</mml:mi><mml:mrow><mml:mo>+</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> photoproduction on the proton at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>8.5</mml:mn><mml:mspace width="0.16em"/><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Measurement of beam asymmetry for photoproduction on the proton at Open
We report a measurement of the $\\pi^-$ photoproduction beam asymmetry for the\nreaction $\\vec{\\gamma} p \\rightarrow \\pi^- \\Delta^{++}$ using data from the\nGlueX experiment in the photon beam energy range 8.2--8.8 GeV. The asymmetry\…
View article: Issue Information ‐ TOC
Issue Information ‐ TOC Open
Wiley's Corporate Citizenship initiative seeks to address the environmental, social, economic, and ethical challenges faced in our business and which are important to our diverse stakeholder groups.
View article: Measurement of the photon beam asymmetry in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mover accent="true"><mml:mi>γ</mml:mi><mml:mo></mml:mo></mml:mover><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi mathvariant="normal">Σ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math> at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>8.5</mml:mn></mml:mrow></mml:math> GeV
Measurement of the photon beam asymmetry in at GeV Open
We report measurements of the photon beam asymmetry $\\Sigma$ for the reaction $\\vec{\\gamma} p\\to K^+\\Sigma^0$(1193) using the GlueX spectrometer in Hall D at Jefferson Lab. Data were collected using a linearly polarized photon beam in…
View article: Digitization of Cylindrical GEM Detector
Digitization of Cylindrical GEM Detector Open
The BESIII inner drift chamber is suffering from aging effect. Cylindrical Gas Electron Multiplier Inner Tracker (CGEM-IT) is considered as one of the upgrade candidates. A simulation study with Garfield++ program has been performed to und…
View article: Digitization modeling of a CGEM detector based on Garfield++ simulation
Digitization modeling of a CGEM detector based on Garfield++ simulation Open
Background The Cylindrical Gas Electron Multiplier Inner Tracker (CGEM-IT) is one of the candidates for the replacement of the current BESIII inner drift chamber, which has developed serious aging effects due to beam-related backgrounds. P…
View article: Beam asymmetry <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Σ</mml:mi></mml:math> for the photoproduction of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math> mesons at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>8.8</mml:mn><mml:mspace width="0.28em"/><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Beam asymmetry for the photoproduction of and mesons at Open
In this work, we report on the measurement of the beam asymmetry $\\Sigma$ for the reactions $\\vec{\\gamma}p\\rightarrow p\\eta$ and $\\vec{\\gamma}p \\rightarrow p\\eta^{\\prime}$ from the GlueX experiment, using an 8.2–8.8-GeV linearly …
View article: First Measurement of Near-Threshold <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> Exclusive Photoproduction off the Proton
First Measurement of Near-Threshold Exclusive Photoproduction off the Proton Open
We report on the measurement of the γp→J/ψp cross section from E_{γ}=11.8 GeV down to the threshold at 8.2 GeV using a tagged photon beam with the GlueX experiment. We find that the total cross section falls toward the threshold less steep…
View article: Measurement of the beam asymmetry <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Σ</mml:mi></mml:math> for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> photoproduction on the proton at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>9</mml:mn></mml:mrow></mml:math> GeV
Measurement of the beam asymmetry for and photoproduction on the proton at GeV Open
We report measurements of the photon beam asymmetry $\\Sigma$ for the\nreactions $\\vec{\\gamma}p\\to p\\pi^0$ and $\\vec{\\gamma}p\\to p\\eta $ from the\nGlueX experiment using a 9 GeV linearly-polarized, tagged photon beam incident\non a…
View article: Results from Electron-Positron Collisions at BESIII
Results from Electron-Positron Collisions at BESIII Open
A selection of results from electron-positron collisions at BESIII are reviewed. The results presented here illustrate the wide range of physics topics that can be studied using the Beijing Electron Positron Collider (BEPC). At low collisi…
View article: Issue Information ‐ TOC
Issue Information ‐ TOC Open
Wiley's Corporate Citizenship initiative seeks to address the environmental, social, economic, and ethical challenges faced in our business and which are important to our diverse stakeholder groups.
View article: Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV
Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV Open
We report measurements of the photon beam asymmetry Σ for the reactions ⃗γp→pπ0 and ⃗γp→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall…