A. Austregesilo
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View article: Baryon anti-Baryon Photoproduction Cross Sections off the Proton
Baryon anti-Baryon Photoproduction Cross Sections off the Proton Open
The GlueX experiment at Jefferson Lab has observed $p\bar{p}$ and, for the first time, $Λ\barΛ$ and $p\barΛ$ photoproduction from a proton target at photon energies up to 11.6 GeV. The angular distributions are forward peaked for all produ…
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: Ambiguities in the partial-wave analysis of the photoproduction of pairs of pseudoscalar mesons
Ambiguities in the partial-wave analysis of the photoproduction of pairs of pseudoscalar mesons Open
Applying the technique of partial-wave analysis, there are cases where more than one set of underlying complex-valued amplitudes can describe the measured observables. These ambiguities can sometimes be resolved using additional informatio…
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: 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: 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: 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 $γp \to π^-Δ^{++}(1232)$ with the GlueX experiment in Hall D at Jefferson Lab. The measurement uses a linearly--polarized photon beam…
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: Light Meson Spectroscopy with GlueX and Beyond
Light Meson Spectroscopy with GlueX and Beyond Open
The GlueX experiment at Jefferson Lab was specifically designed for precision studies of the light-meson spectrum. For this purpose, a photon beam with energies up to 12 GeV is directed onto a liquid hydrogen target contained within a herm…
View article: Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>J</mml:mi></mml:math>/<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ψ</mml:mi></mml:math> photoproduction cross section over the full near-threshold kinematic region
Measurement of the / photoproduction cross section over the full near-threshold kinematic region Open
We report the total and differential cross sections for J/ψ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2 GeV up to 11.44 GeV and over the full kinematic range of momentum t…
View article: Measurement of Spin-Density Matrix Elements in $ρ(770)$ Production with a Linearly Polarized Photon Beam at $E_γ= 8.2\,-\,8.8\,\text{GeV}$
Measurement of Spin-Density Matrix Elements in $ρ(770)$ Production with a Linearly Polarized Photon Beam at $E_γ= 8.2\,-\,8.8\,\text{GeV}$ Open
The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized $8.5\,\text{GeV}$ photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neut…
View article: Measurement of the J/$ψ$ photoproduction cross section over the full near-threshold kinematic region
Measurement of the J/$ψ$ photoproduction cross section over the full near-threshold kinematic region Open
We report the total and differential cross sections for $J/ψ$ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2~GeV up to 11.44~GeV and over the full kinematic range of momentum…
View article: Measurement of Spin Density Matrix Elements in $\Lambda(1520)$ Photoproduction at 8.2 GeV to 8.8 GeV
Measurement of Spin Density Matrix Elements in $\Lambda(1520)$ Photoproduction at 8.2 GeV to 8.8 GeV Open
We report on the measurement of spin density matrix elements of the $\Lambda(1520)$ in the photoproduction reaction $\gamma p\rightarrow \Lambda(1520)K^+$, via its subsequent decay to $K^{-}p$. The measurement was performed as part of the …
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
\nπ
\n−
\n photoproduction beam asymmetry for the reaction
\n→
\nγ
\np
\n→
\nπ
\n−
\nΔ
\n+
\n+
\n using data from the GlueX experiment in the photon beam energy range 8.2–8.8 GeV. The asymmetry
\nΣ
\n is m…
View article: Corrigendum to “Odd and even partial waves of ηπ− and η′π− in π−p → η(′)π−p at 191 GeV/c” [Phys. Lett. B 740 (2015) 303–311]
Corrigendum to “Odd and even partial waves of ηπ− and η′π− in π−p → η(′)π−p at 191 GeV/c” [Phys. Lett. B 740 (2015) 303–311] Open
In Fig. 5 on p. 311 of our Phys. Lett. B 740 (2015) 303 an adjustment by 180∘ is required for the phases with respect to the L=2,M=1 wave, of the following waves: L=1,3,5 with M=1, and L=2 with M=2. After this correction (Fig. 5 (corrected…
View article: The GlueX beamline and detector
The GlueX beamline and detector Open
View article: Erratum to: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons
Erratum to: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons Open
View article: Spin-density matrix elements for vector meson photoproduction at GlueX
Spin-density matrix elements for vector meson photoproduction at GlueX Open
The GlueX experiment at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for hybrid mesons. To this end, a linearly-polarized $9\,$GeV photon beam impinges on a hydrogen target contained within a detector…
View article: Corrigendum to “Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section” [Phys. Lett. B 793 (2019) 188]
Corrigendum to “Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section” [Phys. Lett. B 793 (2019) 188] Open
Transverse extension of partons
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: Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section
Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section Open
View article: Light isovector resonances in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mi>p</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>p</mml:mi></mml:math> at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>190</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi><mml:mo>/</mml:mo><mml:mi>c</mml:mi></mml:mrow></mml:math>
Light isovector resonances in at Open
We have performed the most comprehensive resonance-model fit of $\\pi^-\\pi^-\\pi^+$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction …
View article: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons
Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons Open
View article: K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy
K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy Open
View article: Search for muoproduction of X(3872) at COMPASS and indication of a new state <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mover accent="true"><mml:mrow><mml:mi>X</mml:mi></mml:mrow><mml:mrow><mml:mo>˜</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>
Search for muoproduction of X(3872) at COMPASS and indication of a new state Open
View article: Strategy and foreseeable issues in GlueX 3-body analysis
Strategy and foreseeable issues in GlueX 3-body analysis Open
GlueX DIRC: construction started with BaBar DIRC components for π/K separation up to 4 GeV/
View article: Analysis of ηπ0 and η/π0 Systems at GlueX
Analysis of ηπ0 and η/π0 Systems at GlueX Open
View article: Longitudinal double-spin asymmetry <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mrow><mml:mi>A</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="normal">p</mml:mi></mml:mrow></mml:msubsup></mml:math> and spin-dependent structure function <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:msubsup><mml:mrow><mml:mi>g</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="normal">p</mml:mi></mml:mrow></mml:msubsup></mml:math> of the proton at small values of x and Q2
Longitudinal double-spin asymmetry and spin-dependent structure function of the proton at small values of x and Q2 Open
We present a precise measurement of the proton longitudinal double-spin asymmetry A1p and the proton spin-dependent structure function g1p at photon virtualities 0.006(GeV/c)2
View article: New analysis of ηπ tensor resonances measured at the COMPASS experiment
New analysis of ηπ tensor resonances measured at the COMPASS experiment Open