Michaels, R. (2012) PREX recent results and future prospects. Il nuovo cimento C, 35 (4). pp. 27-31. ISSN 1826-9885
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Abstract
The PREX experiment at Jefferson Lab has measured the parityviolating electroweak asymmetry in the elastic scattering of polarized electrons from 208Pb at an energy of 1.06 GeV and a scattering angle of 5◦. Since the Z0 boson couples mainly to neutrons, this asymmetry provides a clean measurement of the neutron RMS radius Rn of the lead nucleus. In addition to being a fundamental test of nuclear models, a precise measurement of Rn pins down the density dependence of the symmetry energy of neutron rich nuclear matter, which has impacts on neutron star structure, heavy ion collisions, and atomic parity violation experiments. The asymmetry from the first measurements performed in 2010 is Apv = 657±60(stat)± 13(syst) ppb at Q2 = 0.00906 GeV/c. Prospects for follow-up experiments with 208Pb and 48Ca are discussed.
| Item Type: | Article |
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| Uncontrolled Keywords: | Symmetry energy ; Equations of state of nuclear matter ; Nucleon distributions and halo features |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 21 Apr 2020 18:10 |
| Last Modified: | 21 Apr 2020 18:10 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/17878 |
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