Measurement of the neutron radius of Pb208 through parity violation in electron scattering

Abrahamyan, S; Ahmed, Z; Albataineh, H; Aniol, K; Armstrong, DS; Armstrong, W; Averett, T; Babineau, B; Barbieri, A; Bellini, V; Beminiwattha, R; Benesch, J; Benmokhtar, F; Bielarski, T; Boeglin, W; Camsonne, A; Canan, M; Carter, P; Cates, GD; Chen, C; Chen, JP; Hen, O; Cusanno, F; Dalton, MM; De Leo, R; De Jager, K; Deconinck, W; Decowski, P; Deng, X; Deur, A; Dutta, D; Etile, A; Flay, D; Franklin, GB; Friend, M; Frullani, S; Fuchey, E; Garibaldi, F; Gasser, E; Gilman, R; Giusa, A; Glamazdin, A; Gomez, J; Grames, J; Gu, C; Hansen, O; Hansknecht, J; Higinbotham, DW; Holmes, RS; Holmstrom, T; Horowitz, CJ; Hoskins, J; Huang, J; Hyde, CE; Itard, F; Jen, CM; Jensen, E; Jin, G; Johnston, S; Kelleher, A; Kliakhandler, K; King, PM; Kowalski, S; Kumar, KS; Leacock, J; Leckey, J; Lee, JH; Lerose, JJ; Lindgren, R; Liyanage, N; Lubinsky, N; Mammei, J; Mammoliti, F; Margaziotis, DJ; Markowitz, P; McCreary, A; McNulty, D; Mercado, L; Meziani, ZE; Michaels, RW; Mihovilovic, M; Muangma, N; Muñoz-Camacho, C; Nanda, S; Nelyubin, V; Nuruzzaman, N; Oh, Y; Palmer, A; Parno, D; Paschke, KD; Phillips, SK; Poelker, B; Pomatsalyuk, R; Posik, M; Puckett, AJR; Quinn, B; Rakhman, A; Reimer, PE; Riordan, S; Rogan, P

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Genre

Journal Article

Date

2012-03-15

Author

Abrahamyan, S
Ahmed, Z
Albataineh, H
Aniol, K
Armstrong, DS
Armstrong, W
Averett, T
Babineau, B
Barbieri, A
Bellini, V

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DOI

10.1103/PhysRevLett.108.112502

Abstract

We report the first measurement of the parity-violating asymmetry A PV in the elastic scattering of polarized electrons from Pb208. A PV is sensitive to the radius of the neutron distribution (R n). The result A PV=0.656±0.060(stat)±0. 014(syst)ppm corresponds to a difference between the radii of the neutron and proton distributions R n-R p=0.33-0.18+0.16fm and provides the first electroweak observation of the neutron skin which is expected in a heavy, neutron-rich nucleus. © 2012 American Physical Society.

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American Physical Society (APS)

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Physical Review Letters

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