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  1. Article ; Online: Determination of the ^{27}Al Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement.

    Androić, D / Armstrong, D S / Bartlett, K / Beminiwattha, R S / Benesch, J / Benmokhtar, F / Birchall, J / Carlini, R D / Cornejo, J C / Covrig Dusa, S / Dalton, M M / Davis, C A / Deconinck, W / Dowd, J F / Dunne, J A / Dutta, D / Duvall, W S / Elaasar, M / Falk, W R /
    Finn, J M / Forest, T / Gal, C / Gaskell, D / Gericke, M T W / Gray, V M / Grimm, K / Guo, F / Hoskins, J R / Jones, D C / Jones, M K / Kargiantoulakis, M / King, P M / Korkmaz, E / Kowalski, S / Leacock, J / Leckey, J / Lee, A R / Lee, J H / Lee, L / MacEwan, S / Mack, D / Magee, J A / Mahurin, R / Mammei, J / Martin, J W / McHugh, M J / Meekins, D / Mesick, K E / Michaels, R / Micherdzinska, A / Mkrtchyan, A / Mkrtchyan, H / Narayan, A / Ndukum, L Z / Nelyubin, V / Nuruzzaman / van Oers, W T H / Owen, V F / Page, S A / Pan, J / Paschke, K D / Phillips, S K / Pitt, M L / Radloff, R W / Rajotte, J F / Ramsay, W D / Roche, J / Sawatzky, B / Seva, T / Shabestari, M H / Silwal, R / Simicevic, N / Smith, G R / Solvignon, P / Spayde, D T / Subedi, A / Suleiman, R / Tadevosyan, V / Tobias, W A / Tvaskis, V / Waidyawansa, B / Wang, P / Wells, S P / Wood, S A / Yang, S / Zang, P / Zhamkochyan, S / Christy, M E / Horowitz, C J / Fattoyev, F J / Lin, Z

    Physical review letters

    2022  Volume 128, Issue 13, Page(s) 132501

    Abstract: We report the first measurement of the parity-violating elastic electron scattering asymmetry on ^{27}Al. The ^{27}Al elastic asymmetry is A_{PV}=2.16±0.11(stat)±0.16(syst)  ppm, and was measured at ⟨Q^{2}⟩=0.02357±0.00010  GeV^{2}, ⟨θ_{lab}⟩=7.61°±0.02°, ...

    Abstract We report the first measurement of the parity-violating elastic electron scattering asymmetry on ^{27}Al. The ^{27}Al elastic asymmetry is A_{PV}=2.16±0.11(stat)±0.16(syst)  ppm, and was measured at ⟨Q^{2}⟩=0.02357±0.00010  GeV^{2}, ⟨θ_{lab}⟩=7.61°±0.02°, and ⟨E_{lab}⟩=1.157  GeV with the Q_{weak} apparatus at Jefferson Lab. Predictions using a simple Born approximation as well as more sophisticated distorted-wave calculations are in good agreement with this result. From this asymmetry the ^{27}Al neutron radius R_{n}=2.89±0.12  fm was determined using a many-models correlation technique. The corresponding neutron skin thickness R_{n}-R_{p}=-0.04±0.12  fm is small, as expected for a light nucleus with a neutron excess of only 1. This result thus serves as a successful benchmark for electroweak determinations of neutron radii on heavier nuclei. A tree-level approach was used to extract the ^{27}Al weak radius R_{w}=3.00±0.15  fm, and the weak skin thickness R_{wk}-R_{ch}=-0.04±0.15  fm. The weak form factor at this Q^{2} is F_{wk}=0.39±0.04.
    Language English
    Publishing date 2022-04-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.132501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Precision Measurement of the Beam-Normal Single-Spin Asymmetry in Forward-Angle Elastic Electron-Proton Scattering.

    Androić, D / Armstrong, D S / Asaturyan, A / Bartlett, K / Beaufait, J / Beminiwattha, R S / Benesch, J / Benmokhtar, F / Birchall, J / Carlini, R D / Cornejo, J C / Dusa, S Covrig / Dalton, M M / Davis, C A / Deconinck, W / Dowd, J F / Dunne, J A / Dutta, D / Duvall, W S /
    Elaasar, M / Falk, W R / Finn, J M / Forest, T / Gal, C / Gaskell, D / Gericke, M T W / Grames, J / Gray, V M / Grimm, K / Guo, F / Hoskins, J R / Jones, D / Jones, M K / Jones, R T / Kargiantoulakis, M / King, P M / Korkmaz, E / Kowalski, S / Leacock, J / Leckey, J P / Lee, A R / Lee, J H / Lee, L / MacEwan, S / Mack, D / Magee, J A / Mahurin, R / Mammei, J / Martin, J W / McHugh, M J / Meekins, D / Mei, J / Mesick, K E / Michaels, R / Micherdzinska, A / Mkrtchyan, A / Mkrtchyan, H / Morgan, N / Narayan, A / Ndukum, L Z / Nelyubin, V / Nuruzzaman / van Oers, W T H / Owen, V F / Page, S A / Pan, J / Paschke, K D / Phillips, S K / Pitt, M L / Radloff, R W / Rajotte, J F / Ramsay, W D / Roche, J / Sawatzky, B / Seva, T / Shabestari, M H / Silwal, R / Simicevic, N / Smith, G R / Solvignon, P / Spayde, D T / Subedi, A / Subedi, R / Suleiman, R / Tadevosyan, V / Tobias, W A / Tvaskis, V / Waidyawansa, B / Wang, P / Wells, S P / Wood, S A / Yang, S / Zang, P / Zhamkochyan, S

    Physical review letters

    2020  Volume 125, Issue 11, Page(s) 112502

    Abstract: A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the two-photon exchange process. We report a 2% precision measurement of the ... ...

    Abstract A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the two-photon exchange process. We report a 2% precision measurement of the beam-normal single-spin asymmetry in elastic electron-proton scattering with a mean scattering angle of θ_{lab}=7.9° and a mean energy of 1.149 GeV. The asymmetry result is B_{n}=-5.194±0.067(stat)±0.082 (syst) ppm. This is the most precise measurement of this quantity available to date and therefore provides a stringent test of two-photon exchange models at far-forward scattering angles (θ_{lab}→0) where they should be most reliable.
    Language English
    Publishing date 2020-09-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.125.112502
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

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  3. Article ; Online: Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies.

    Abbott, D / Adderley, P / Adeyemi, A / Aguilera, P / Ali, M / Areti, H / Baylac, M / Benesch, J / Bosson, G / Cade, B / Camsonne, A / Cardman, L S / Clark, J / Cole, P / Covert, S / Cuevas, C / Dadoun, O / Dale, D / Dong, H /
    Dumas, J / Fanchini, E / Forest, T / Forman, E / Freyberger, A / Froidefond, E / Golge, S / Grames, J / Guèye, P / Hansknecht, J / Harrell, P / Hoskins, J / Hyde, C / Josey, B / Kazimi, R / Kim, Y / Machie, D / Mahoney, K / Mammei, R / Marton, M / McCarter, J / McCaughan, M / McHugh, M / McNulty, D / Mesick, K E / Michaelides, T / Michaels, R / Moffit, B / Moser, D / Muñoz Camacho, C / Muraz, J-F / Opper, A / Poelker, M / Réal, J-S / Richardson, L / Setiniyaz, S / Stutzman, M / Suleiman, R / Tennant, C / Tsai, C / Turner, D / Ungaro, M / Variola, A / Voutier, E / Wang, Y / Zhang, Y

    Physical review letters

    2016  Volume 116, Issue 21, Page(s) 214801

    Abstract: The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the ... ...

    Abstract The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-Z target. Positron polarization up to 82% have been measured for an initial electron beam momentum of 8.19  MeV/c, limited only by the electron beam polarization. This technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community.
    Language English
    Publishing date 2016-05-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.116.214801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

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