Search Results - "Macgregor, I. J. D."
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1
Neutron Skin of Pb 208 from Coherent Pion Photoproduction
Published in Physical review letters (18-06-2014)Get full text
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Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton
Published in Physical review letters (01-04-2022)“…A precise measurement of the differential cross sections dσ/dΩ and the linearly polarized photon beam asymmetry Σ_{3} for Compton scattering on the proton…”
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In-medium modifications of the ω meson near the production threshold
Published in The European physical journal. A, Hadrons and nuclei (2013)“…The in-medium properties of the ω meson were investigated at the MAMI-C electron accelerator using the Crystal Ball/TAPS detector system to identify ω mesons…”
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Investigation of the exclusive 3He(e,e' pn)1H reaction
Published in Physical review letters (09-10-2009)“…Cross sections for the 3He(e,e' pn)1H reaction were measured for the first time at energy transfers of 220 and 270 MeV for several momentum transfers ranging…”
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5
Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei
Published in Physical review letters (03-05-2019)“…We measured the triple coincidence A(e,e^{'}np) and A(e,e^{'}pp) reactions on carbon, aluminum, iron, and lead targets at Q^{2}>1.5 (GeV/c)^{2}, x_{B}>1.1 and…”
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6
Double pion photoproduction off 40Ca
Published in The European physical journal. A, Hadrons and nuclei (01-05-2007)“…The photoproduction of π0π0 and π0π± pairs off 40Ca has been investigated with the TAPS detector using the Glasgow photon tagging spectrometer at the Mainz…”
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Measurement of the Q^2 Dependence of the Deuteron Spin Structure Function g_1 and its Moments at Low Q^2 with CLAS
Published 18-02-2022“…Phys. Rev. Lett. 120, 062501 (2018) We measured the $g_1$ spin structure function of the deuteron at low $Q^{2}$, where QCD can be approximated with chiral…”
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First measurements of the 16O(e, e'pn)14N reaction
Published in The European physical journal. A, Hadrons and nuclei (01-09-2006)Get full text
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9
3He(e,e′pp) and 3He(e,e′pn) reactions at AmPS and MAMI
Published in Few-body systems (01-12-2008)“…This paper reports on measurements of the 3 He( e , e ′ pp ) reaction measured at AmPS and the 3 He( e , e ′ pn ) reaction measured at MAMI. The measurements…”
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A multidimensional study of the structure function ratio σLT′/σ0 from hard exclusive π+ electro-production off protons in the GPD regime
Published in Physics letters. B (10-04-2023)“…A multidimensional extraction of the structure function ratio σLT′/σ0 from the hard exclusive e→p→e′nπ+ reaction above the resonance region has been performed…”
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Extraction of Beam-Spin Asymmetries from the Hard Exclusive π + Channel off Protons in a Wide Range of Kinematics
Published in Physical review letters (28-10-2020)“…We have measured beam-spin asymmetries to extract the sinϕ moment ALUsinϕ from the hard exclusive e→p→e′nπ+ reaction above the resonance region, for the first…”
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12
Beam spin asymmetry in semi-inclusive electroproduction of a hadron pair
Published 19-10-2020“…Phys. Rev. Lett. 126, 062002 (2021) A first measurement of the longitudinal beam spin asymmetry ALU in the semi-inclusive electroproduction of pairs of charged…”
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Signatures of the d^{}(2380) Hexaquark in d(γ,pn[over →])
Published in Physical review letters (03-04-2020)“…We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within…”
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Observation of Azimuth-Dependent Suppression of Hadron Pairs in Electron Scattering off Nuclei
Published in Physical review letters (28-10-2022)“…We present the first measurement of di-hadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV…”
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15
First measurement of polarisation transfer Cx'n in deuteron photodisintegration
Published in Physics letters. B (14-07-2023)“…A first measurement of the polarisation transfer from a circularly-polarised photon to the final state neutron (Cx'n) in deuterium photodisintegration has been…”
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First Measurement Using Elliptically Polarized Photons of the Double-Polarization Observable E for γ p → p π 0 and γ p → n π
Published in Physical review letters (19-03-2024)“…We report the measurement of the helicity asymmetry E for the p π 0 and n π + final states using, for the first time, an elliptically polarized photon beam in…”
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Beam spin asymmetry measurements of deeply virtual π0 production with CLAS12
Published in Physics letters. B (01-02-2024)“…The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive π0 production in a wide kinematic region with the…”
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Measurements of double-polarized compton scattering asymmetries and extraction of the proton spin polarizabilities
Published in Physical review letters (20-03-2015)“…The spin polarizabilities of the nucleon describe how the spin of the nucleon responds to an incident polarized photon. The most model-independent way to…”
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Precise determination of the deuteron spin structure at low to moderate Q2 with CLAS and extraction of the neutron contribution
Published in Physical review. C, Nuclear physics (02-11-2015)“…In this study, we present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in…”
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First Measurement of Λ Electroproduction off Nuclei in the Current and Target Fragmentation Regions
Published in Physical review letters (04-04-2023)“…Here, we report results of Λ hyperon production in semi-inclusive deep-inelastic scattering off deuterium, carbon, iron, and lead targets obtained with the…”
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