Accurate Determination of the Neutron Skin Thickness of Pb 208 through Parity-Violation in Electron Scattering
Year: 2021
Type: article
Abstract: We report a precision measurement of the parity-violating asymmetry A_{PV} in the elastic scattering of longitudinally polarized electrons from ^{208}Pb. We measure A_{PV}=550±16(stat)±8(syst) parts per billion, leading to an extraction of the neutral weak form factor F_{W}(Q^{2}=0.00616 GeV^{2})=0.368±0.013. Combined with our previous measurement, the extracted neutron skin thickness is R_{n}-R_{p}=0.283±0.071 fm. The result also yields the first significant direct measurement of the interior weak density of ^{208}Pb: ρ_{W}^{0}=-0.0796±0.0036(exp)±0.0013(theo) fm^{-3} leading to the interior baryon density ρ_{b}^{0}=0.1480±0.0036(exp)±0.0013(theo) fm^{-3}. The measurement accurately constrains the density dependence of the symmetry energy of nuclear matter near saturation density, with implications for the size and composition of neutron stars.
Source: Physical Review Letters
Authors: D. Adhikari, H. Albataineh, D. Androic, K. Aniol, D. S. Armstrong, T. Averett, C. Ayerbe Gayoso, S. Barcus, V. Bellini, R. S. Beminiwattha, J. F. Benesch, H. Bhatt, D. Bhatta Pathak, D. Bhetuwal, B. Blaikie, Q. Campagna, A. Camsonne, G. D. Cates, Y. Chen, C. Clarke, J. C. Cornejo, S. Covrig Dusa, P. Datta, A. Deshpande, D. Dutta, C. Feldman, E. Fuchey, C. Gal, D. Gaskell, T. Gautam, M. Gericke, C. Ghosh, I. Halilovic, J.-O. Hansen, F. Hauenstein, W. Henry, C. J. Horowitz, C. Jantzi, S. Jian, S. Johnston, D. C. Jones, B. Karki, S. Katugampola, C. Keppel, P. M. King, D. E. King, M. Knauss, K. S. Kumar, T. Kutz, N. Lashley-Colthirst, G. Leverick, H. Liu, N. Liyange, S. Malace, R. Mammei, J. Mammei, M. McCaughan, D. McNulty, D. Meekins, C. Metts, R. Michaels, M. M. Mondal, J. Napolitano, A. Narayan, D. Nikolaev, M. N. H. Rashad, V. Owen, C. Palatchi, J. Pan, B. Pandey, S. Park, K. D. Paschke, M. Petrusky, M. L. Pitt, S. Premathilake, A. J. R. Puckett, B. Quinn, R. Radloff, S. Rahman, A. Rathnayake, B. T. Reed, P. E. Reimer, R. Richards, S. Riordan, Y. Roblin, S. Seeds, A. Shahinyan, P. Souder, L. Tang, M. Thiel, Y. Tian, G. M. Urciuoli, E. W. Wertz, B. Wojtsekhowski, B. Yale, T. Ye, A. Yoon, A. Zec, W. Zhang, J. Zhang, X. Zheng
Institutions: Idaho State University, Texas A&M University – Kingsville, University of Zagreb, California State University Los Angeles, William & Mary, Thomas Jefferson National Accelerator Facility, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Louisiana Tech University, Mississippi State University, University of Manitoba, University of Virginia, State University of New York, Stony Brook University, Carnegie Mellon University, University of Connecticut, Hampton University, University of Massachusetts Amherst, Old Dominion University, Temple University, Indiana University Bloomington, Indiana University, Ohio University, Syracuse University, Duquesne University, The University of Winnipeg, Veer Kunwar Singh University, Virginia Tech, Argonne National Laboratory, A. Alikhanyan National Laboratory, Johannes Gutenberg University Mainz, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Christopher Newport University, Shandong University
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1728142190, PRECISION ELECTROWEAK PROBES OF NEUTRON-RICH MATTER AND BSM PHYSICS, G1848180026, G2263355576, G2702141073, G2988778103, ELECTRON DETECTOR FOR THE JEFFERSON LAB HALL C COMPTON POLARIMETER, PARITY VIOLATING ELECTRON SCATTERING EXPERIMENTS AT JEFFERSON LAB, G6427981414, G6564173845, G6674091005, G7520763071
OpenAlex ID: W3132010812