Weak charge form factor and radius of 208Pb through parity violation in electron scattering

被引：181

作者：

Horowitz, C. J. ^{[1
,2
]}

Ahmed, Z. ^{[3
]}

Jen, C. -M. ^{[3
]}

Rakhman, A. ^{[3
]}

Souder, P. A. ^{[3
]}

Dalton, M. M. ^{[4
]}

Liyanage, N. ^{[4
]}

Paschke, K. D. ^{[4
]}

Saenboonruang, K. ^{[4
]}

Silwal, R. ^{[4
]}

Franklin, G. B. ^{[5
]}

Friend, M. ^{[5
]}

Quinn, B. ^{[5
]}

Kumar, K. S. ^{[6
]}

McNulty, D. ^{[6
]}

Mercado, L. ^{[6
]}

Riordan, S. ^{[6
]}

Wexler, J. ^{[6
]}

Michaels, R. W. ^{[7
]}

Urciuoli, G. M. ^{[8
]}

机构：

[1] Univ Tennessee, Knoxville, TN 37996 USA

[2] Indiana Univ, Bloomington, IN 47405 USA

[3] Syracuse Univ, Syracuse, NY 13244 USA

[4] Univ Virginia, Charlottesville, VA 22903 USA

[5] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[6] Univ Massachusetts, Amherst, MA 01003 USA

[7] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[8] INFN, Sez Roma, I-00161 Rome, Italy

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 03期

关键词：

PROTON-SCATTERING; NUCLEON STRANGE; PARAMETRIZATION;

D O I：

10.1103/PhysRevC.85.032501

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We use distorted wave electron scattering calculations to extract the weak charge form factor F-W ((q) over bar), the weak charge radius R-W, and the point neutron radius R-n of Pb-208 from the Lead Radius Experiment (PREX) parity-violating asymmetry measurement. The form factor is the Fourier transform of the weak charge density at the average momentum transfer (q) over bar = 0.475 fm(-1). We find F-W ((q) over bar) = 0.204 +/- 0.028 (exp) +/- 0.001 (model). We use the Helm model to infer the weak radius from F-W ((q) over bar). We find R-W = 5.826 +/- 0.181 (exp) +/- 0.027 (model) fm. Here the experimental error includes PREX statistical and systematic errors, while the model error describes the uncertainty in R-W from uncertainties in the surface thickness sigma of the weak charge density. The weak radius is larger than the charge radius, implying a "weak charge skin" where the surface region is relatively enriched in weak charges compared to (electromagnetic) charges. We extract the point neutron radius R-n = 5.751 +/- 0.175 (exp) +/- 0.026 (model) +/- 0.005 (strange) fm from R-W. Here there is only a very small error (strange) from possible strange quark contributions. We find R-n to be slightly smaller than RW because of the nucleon's size. Finally, we find a neutron skin thickness of R-n - R-p = 0.302 +/- 0.175 (exp) +/- 0.026 (model) +/- 0.005 (strange) fm, where R-p is the point proton radius.

引用

页数：5

共 38 条

[1] Measurement of the Neutron Radius of 208Pb through Parity Violation in Electron Scattering [J].

Abrahamyan, S. ;

Ahmed, Z. ;

Albataineh, H. ;

Aniol, K. ;

Armstrong, D. S. ;

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, G. D. ;

Chen, C. ;

Chen, J-P ;

Hen, O. ;

Cusanno, F. ;

Dalton, M. M. ;

De Leo, R. ;

de Jager, K. ;

Deconinck, W. ;

Decowski, P. ;

Deng, X. ;

Deur, A. ;

Dutta, D. ;

Etile, A. ;

Flay, D. ;

Franklin, G. B. ;

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, D. W. ;

Holmes, R. S. ;

Holmstrom, T. .

PHYSICAL REVIEW LETTERS, 2012, 108 (11)

[2] Precision measurements of the nucleon strange form factors at Q2∼0.1 GeV2 [J].

Acha, A. ;

Aniol, K. A. ;

Armstrong, D. S. ;

Arrington, J. ;

Averett, T. ;

Bailey, S. L. ;

Barber, J. ;

Beck, A. ;

Benaoum, H. ;

Benesch, J. ;

Bertin, P. Y. ;

Bosted, P. ;

Butaru, F. ;

Burtin, E. ;

Cates, G. D. ;

Chao, Y. -C. ;

Chen, J. -P. ;

Chudakov, E. ;

Cisbani, E. ;

Craver, B. ;

Cusanno, F. ;

De Leo, R. ;

Decowski, P. ;

Deur, A. ;

Feuerbach, R. J. ;

Finn, J. M. ;

Frullani, S. ;

Fuchs, S. A. ;

Fuoti, K. ;

Gilman, R. ;

Glesener, L. E. ;

Grimm, K. ;

Grames, J. M. ;

Hansen, J. O. ;

Hansknecht, J. ;

Higinbotham, D. W. ;

Holmes, R. ;

Holmstrom, T. ;

Ibrahim, H. ;

de Jager, C. W. ;

Jiang, X. ;

Katich, J. ;

Kaufman, L. J. ;

Kelleher, A. ;

King, P. M. ;

Kolarkar, A. ;

Kowalski, S. ;

Kuchina, E. ;

Kumar, K. S. ;

Lagamba, L. .

PHYSICAL REVIEW LETTERS, 2007, 98 (03)

[3]

Ahmed Z., ARXIV11070913NUCLEX

[4] Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment [J].

Androic, D. ;

Armstrong, D. S. ;

Arvieux, J. ;

Bailey, S. L. ;

Beck, D. H. ;

Beise, E. J. ;

Benesch, J. ;

Benmokhtar, F. ;

Bimbot, L. ;

Birchall, J. ;

Bosted, P. ;

Breuer, H. ;

Capuano, C. L. ;

Chao, Y. -C. ;

Coppens, A. ;

Davis, C. A. ;

Ellis, C. ;

Flores, G. ;

Franklin, G. ;

Furget, C. ;

Gaskell, D. ;

Gericke, M. I. W. ;

Grames, J. ;

Guillard, G. ;

Hansknecht, J. ;

Horn, T. ;

Jones, M. ;

King, P. M. ;

Korsch, W. ;

Kox, S. ;

Lee, L. ;

Liu, J. ;

Lung, A. ;

Mammei, J. ;

Martin, J. W. ;

McKeown, R. D. ;

Mihovilovic, M. ;

Micherdzinska, A. ;

Mkrtchyan, H. ;

Muether, M. ;

Page, S. A. ;

Papavassiliou, V. ;

Pate, S. F. ;

Phillips, S. K. ;

Pillot, P. ;

Pitt, M. L. ;

Poelker, M. ;

Quinn, B. ;

Ramsay, W. D. ;

Real, J. -S. .

PHYSICAL REVIEW LETTERS, 2010, 104 (01)

[5] Parity-violating electron scattering from 4He and the strange electric form factor of the nucleon -: art. no. 022003 [J].

Aniol, KA ;

Armstrong, DS ;

Averett, T ;

Benaoum, H ;

Bertin, PY ;

Burtin, E ;

Cahoon, J ;

Cates, GD ;

Chang, CC ;

Chao, YC ;

Chen, JP ;

Choi, S ;

Chudakov, E ;

Craver, B ;

Cusanno, F ;

Decowski, P ;

Deepa, D ;

Ferdi, C ;

Feuerbach, RJ ;

Finn, JM ;

Frullani, S ;

Fuoti, K ;

Garibaldi, F ;

Gilman, R ;

Glamazdin, A ;

Gorbenko, V ;

Grames, JM ;

Hansknecht, J ;

Higinbotham, DW ;

Holmes, R ;

Holmstrom, T ;

Humensky, TB ;

Ibrahim, H ;

de Jager, CW ;

Jiang, X ;

Kaufman, LJ ;

Kelleher, A ;

Kolarkar, A ;

Kowalski, S ;

Kumar, KS ;

Lambert, D ;

LaViolette, P ;

LeRose, J ;

Lhuillier, D ;

Liyanage, N ;

Margaziotis, DJ ;

Mazouz, M ;

McCormick, K ;

Meekins, DG ;

Meziani, ZE .

PHYSICAL REVIEW LETTERS, 2006, 96 (02)

[6] Constraints on the nucleon strange form factors at Q2∼0.1 GeV2 [J].

Aniol, KA ;

Armstrong, DS ;

Averett, T ;

Benaoum, H ;

Bertin, PY ;

Burtin, E ;

Cahoon, J ;

Gates, GD ;

Chang, CC ;

Chao, YC ;

Chen, JP ;

Choi, SH ;

Chudakov, E ;

Craver, B ;

Cusanno, F ;

Decowski, P ;

Deepa, D ;

Ferdi, C ;

Feuerbach, RJ ;

Finn, JM ;

Frullani, S ;

Fuoti, K ;

Garibaldi, F ;

Gilman, R ;

Glamazdin, A ;

Gorbenko, V ;

Grames, JM ;

Hansknecht, J ;

Higinbotham, DW ;

Holmes, R ;

Holmstrom, T ;

Humensky, TB ;

Ibrahim, H ;

de Jager, CW ;

Jiang, X ;

Kaufman, LJ ;

Kelleher, A ;

Kolarkar, A ;

Kowalski, S ;

Kumar, KS ;

Lambert, D ;

LaViolette, P ;

LeRose, J ;

Lhuillier, D ;

Liyanage, N ;

Margaziotis, DJ ;

Mazouz, M ;

McCormick, K ;

Meekins, DG ;

Meziani, ZE .

PHYSICS LETTERS B, 2006, 635 (5-6) :275-279

[7] Parity-violating electroweak asymmetry in (e)over-right-arrowp scattering -: art. no. 065501 [J].

Aniol, KA ;

Armstrong, DS ;

Averett, T ;

Baylac, M ;

Burtin, E ;

Calarco, J ;

Cates, GD ;

Cavata, C ;

Chai, Z ;

Chang, CC ;

Chen, JP ;

Chudakov, E ;

Cisbani, E ;

Coman, M ;

Dale, D ;

Deur, A ;

Djawotho, P ;

Epstein, MB ;

Escoffier, S ;

Ewell, L ;

Falletto, N ;

Finn, JM ;

Fissum, K ;

Fleck, A ;

Frois, B ;

Frullani, S ;

Gao, J ;

Garibaldi, F ;

Gasparian, A ;

Gerstner, GM ;

Gilman, R ;

Glamazdin, A ;

Gomez, J ;

Gorbenko, V ;

Hansen, O ;

Hersman, F ;

Higinbotham, DW ;

Holmes, R ;

Holtrop, M ;

Humensky, TB ;

Incerti, S ;

Iodice, M ;

de Jager, CW ;

Jardillier, J ;

Jiang, X ;

Jones, MK ;

Jorda, J ;

Jutier, C ;

Kahl, W ;

Kelly, JJ .

PHYSICAL REVIEW C, 2004, 69 (06) :065501-1

[8] New measurement of parity violation in elastic electron-proton scattering and implications for strange form factors [J].

Aniol, KA ;

Armstrong, DS ;

Averett, T ;

Baylac, M ;

Burtin, E ;

Calarco, J ;

Cates, GD ;

Cavata, C ;

Chai, Z ;

Chang, CC ;

Chen, JP ;

Chudakov, E ;

Cisbani, E ;

Coman, M ;

Dale, D ;

Deur, A ;

Djawotho, P ;

Epstein, MB ;

Escoffier, S ;

Ewell, L ;

Falletto, N ;

Finn, JM ;

Fleck, A ;

Frois, B ;

Frullani, S ;

Gao, J ;

Garibaldi, F ;

Gasparian, A ;

Gerstner, GM ;

Gilman, R ;

Glamazdin, A ;

Gomez, J ;

Gorbenko, V ;

Hansen, O ;

Hersman, F ;

Higinbotham, DW ;

Holmes, R ;

Holtrop, M ;

Humensky, B ;

Incerti, S ;

Iodice, M ;

de Jager, CW ;

Jardillier, J ;

Jiang, X ;

Jones, MK ;

Jorda, J ;

Jutier, C ;

Kahl, W ;

Kelly, JJ ;

Kim, DH .

PHYSICS LETTERS B, 2001, 509 (3-4) :211-216

[9] Strange-quark contributions to parity-violating asymmetries in the forward G0 electron-proton scattering experiment -: art. no. 092001 [J].

Armstrong, DS ;

Arvieux, J ;

Asaturyan, R ;

Averett, T ;

Bailey, SL ;

Batigne, G ;

Beck, DH ;

Beise, EJ ;

Benesch, J ;

Bimbot, L ;

Birchall, J ;

Biselli, A ;

Bosted, P ;

Boukobza, E ;

Breuer, H ;

Carlini, R ;

Carr, R ;

Chant, N ;

Chao, YC ;

Chattopadhyay, S ;

Clark, R ;

Covrig, S ;

Cowley, A ;

Dale, D ;

Davis, C ;

Falk, W ;

Finn, JM ;

Forest, T ;

Franklin, G ;

Furget, C ;

Gaskell, D ;

Grames, J ;

Griffioen, KA ;

Grimm, K ;

Guillon, B ;

Guler, H ;

Hannelius, L ;

Hasty, R ;

Allen, AH ;

Horn, T ;

Johnston, K ;

Jones, M ;

Kammel, P ;

Kazimi, R ;

King, PM ;

Kolarkar, A ;

Korkmaz, E ;

Korsch, W ;

Kox, S ;

Kuhn, J .

PHYSICAL REVIEW LETTERS, 2005, 95 (09)

[10] Parity violating electron scattering measurements of neutron densities [J].

Ban, Shufang ;

Horowitz, C. J. ;

Michaels, R. .

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2012, 39 (01)

← 1 2 3 4 →