Precision Measurements of the Nucleon Strange Form Factors atQ2∼0.1 GeV2

A. Acha,K. A. Aniol,D. S. Armstrong,John Arrington,T. Averett,S. L. Bailey,J. Barber,A. Beck,Hachemi Benaoum,J. Benesch,P. Y. Bertin,P. Bosted,F. Butaru,E. Burtin,G. D. Cates,Y.-C. Chao,J.-P. Chen,E. Chudakov,Evaristo Cisbani,B. Craver,F. Cusanno,R. De Leo,P. Decowski,A. Deur,R. J. Feuerbach,J. M. Finn,S. Frullani,S. A. Fuchs,K. Fuoti,R. Gilman,L. E. Glesener,K. Grimm,J. M. Grames,J. O. Hansen,J. Hansknecht,Douglas Higinbotham,R. Holmes,T. Holmstrom,H. Ibrahim,C. W. De Jager,X. Jiang,J. Katich,L. J. Kaufman,A. Kelleher,P. M. King,A. Kolarkar,S. Kowalski,E. Kuchina,Krishna Kumar,Luigi Lagamba,P. LaViolette,J. Lerose,R. A. Lindgren,D. Lhuillier,N. Liyanage,D. J. Margaziotis,Pete Markowitz,D. G. Meekins,Z.-E. Meziani,R. Michaels,B. Moffit,S. Nanda,V. Nelyubin,K. Otis,K. D. Paschke,S. K. Phillips,M. Poelker,R. Pomatsalyuk,M. Potokar,Y. Prok,A. Puckett,Xin Qian,Y. Qiang,B. Reitz,J. Roche,A. Saha,B. Sawatzky,Jaideep Singh,K. Slifer,S. Širca,R. Snyder,P. Solvignon,P. A. Souder,M. L. Stutzman,R. Subedi,R. Suleiman,V. Sulkosky,W. A. Tobias,P. E. Ulmer,G. M. Urciuoli,K. Wang,A. Whitbeck,R. Wilson,B. Wojtsekhowski,H. Yao,Y. Ye,X. Zhan,X. Zheng,S. Zhou,V. Ziskin; A. Acha; K. A. Aniol; D. S. Armstrong; John Arrington; T. Averett; S. L. Bailey; J. Barber; A. Beck; Hachemi Benaoum; J. Benesch; P. Y. Bertin; P. Bosted; F. Butaru; E. Burtin; G. D. Cates; Y.-C. Chao; J.-P. Chen; E. Chudakov; Evaristo Cisbani; B. Craver; F. Cusanno; R. De Leo; P. Decowski; A. Deur; R. J. Feuerbach; J. M. Finn; S. Frullani; S. A. Fuchs; K. Fuoti; R. Gilman; L. E. Glesener; K. Grimm; J. M. Grames; J. O. Hansen; J. Hansknecht; Douglas Higinbotham; R. Holmes; T. Holmstrom; H. Ibrahim; C. W. De Jager; X. Jiang; J. Katich; L. J. Kaufman; A. Kelleher; P. M. King; A. Kolarkar; S. Kowalski; E. Kuchina; Krishna Kumar; Luigi Lagamba; P. LaViolette; J. Lerose; R. A. Lindgren; D. Lhuillier; N. Liyanage; D. J. Margaziotis; Pete Markowitz; D. G. Meekins; Z.-E. Meziani; R. Michaels; B. Moffit; S. Nanda; V. Nelyubin; K. Otis; K. D. Paschke; S. K. Phillips; M. Poelker; R. Pomatsalyuk; M. Potokar; Y. Prok; A. Puckett; Xin Qian; Y. Qiang; B. Reitz; J. Roche; A. Saha; B. Sawatzky; Jaideep Singh; K. Slifer; S. Širca; R. Snyder; P. Solvignon; P. A. Souder; M. L. Stutzman; R. Subedi; R. Suleiman; V. Sulkosky; W. A. Tobias; P. E. Ulmer; G. M. Urciuoli; K. Wang; A. Whitbeck; R. Wilson; B. Wojtsekhowski; H. Yao; Y. Ye; X. Zhan; X. Zheng; S. Zhou; V. Ziskin

Precision Measurements of the Nucleon Strange Form Factors atQ2∼0.1 GeV2

A. Acha,K. A. Aniol,D. S. Armstrong,John Arrington,T. Averett,S. L. Bailey,J. Barber,A. Beck,Hachemi Benaoum,J. Benesch,P. Y. Bertin,P. Bosted,F. Butaru,E. Burtin,G. D. Cates,Y.-C. Chao,J.-P. Chen,E. Chudakov,Evaristo Cisbani,B. Craver,F. Cusanno,R. De Leo,P. Decowski,A. Deur,R. J. Feuerbach,J. M. Finn,S. Frullani,S. A. Fuchs,K. Fuoti,R. Gilman,L. E. Glesener,K. Grimm,J. M. Grames,J. O. Hansen,J. Hansknecht,Douglas Higinbotham,R. Holmes,T. Holmstrom,H. Ibrahim,C. W. De Jager,X. Jiang,J. Katich,L. J. Kaufman,A. Kelleher,P. M. King,A. Kolarkar,S. Kowalski,E. Kuchina,Krishna Kumar,Luigi Lagamba,P. LaViolette,J. Lerose,R. A. Lindgren,D. Lhuillier,N. Liyanage,D. J. Margaziotis,Pete Markowitz,D. G. Meekins,Z.-E. Meziani,R. Michaels,B. Moffit,S. Nanda,V. Nelyubin,K. Otis,K. D. Paschke,S. K. Phillips,M. Poelker,R. Pomatsalyuk,M. Potokar,Y. Prok,A. Puckett,Xin Qian,Y. Qiang,B. Reitz,J. Roche,A. Saha,B. Sawatzky,Jaideep Singh,K. Slifer,S. Širca,R. Snyder,P. Solvignon,P. A. Souder,M. L. Stutzman,R. Subedi,R. Suleiman,V. Sulkosky,W. A. Tobias,P. E. Ulmer,G. M. Urciuoli,K. Wang,A. Whitbeck,R. Wilson,B. Wojtsekhowski,H. Yao,Y. Ye,X. Zhan,X. Zheng,S. Zhou,V. Ziskin;A. Acha;K. A. Aniol;D. S. Armstrong;John Arrington;T. Averett;S. L. Bailey;J. Barber;A. Beck;Hachemi Benaoum;J. Benesch;P. Y. Bertin;P. Bosted;F. Butaru;E. Burtin;G. D. Cates;Y.-C. Chao;J.-P. Chen;E. Chudakov;Evaristo Cisbani;B. Craver;F. Cusanno;R. De Leo;P. Decowski;A. Deur;R. J. Feuerbach;J. M. Finn;S. Frullani;S. A. Fuchs;K. Fuoti;R. Gilman;L. E. Glesener;K. Grimm;J. M. Grames;J. O. Hansen;J. Hansknecht;Douglas Higinbotham;R. Holmes;T. Holmstrom;H. Ibrahim;C. W. De Jager;X. Jiang;J. Katich;L. J. Kaufman;A. Kelleher;P. M. King;A. Kolarkar;S. Kowalski;E. Kuchina;Krishna Kumar;Luigi Lagamba;P. LaViolette;J. Lerose;R. A. Lindgren;D. Lhuillier;N. Liyanage;D. J. Margaziotis;Pete Markowitz;D. G. Meekins;Z.-E. Meziani;R. Michaels;B. Moffit;S. Nanda;V. Nelyubin;K. Otis;K. D. Paschke;S. K. Phillips;M. Poelker;R. Pomatsalyuk;M. Potokar;Y. Prok;A. Puckett;Xin Qian;Y. Qiang;B. Reitz;J. Roche;A. Saha;B. Sawatzky;Jaideep Singh;K. Slifer;S. Širca;R. Snyder;P. Solvignon;P. A. Souder;M. L. Stutzman;R. Subedi;R. Suleiman;V. Sulkosky;W. A. Tobias;P. E. Ulmer;G. M. Urciuoli;K. Wang;A. Whitbeck;R. Wilson;B. Wojtsekhowski;H. Yao;Y. Ye;X. Zhan;X. Zheng;S. Zhou;V. Ziskin;

physical review letters 2007 Vol. 98 pp. 032301-

293

ziskin2007physicalprecision

Abstract

We report new measurements of the parity-violating asymmetry APV in elastic scattering of 3 GeV electrons off hydrogen and He4 targets with ⟨θlab⟩≈6.0°. The He4 result is APV=(+6.40±0.23(stat)±0.12(syst))×10−6. The hydrogen result is APV=(−1.58±0.12(stat)±0.04(syst))×10−6. These results significantly improve constraints on the electric and magnetic strange form factors GEs and GMs. We extract GEs=0.002±0.014±0.007 at ⟨Q2⟩=0.077 GeV2, and GEs+0.09GMs=0.007±0.011±0.006 at ⟨Q2⟩=0.109 GeV2, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.

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accuracy magnetization asymmetry parity nucleons elastic scattering

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10.1103/physrevlett.98.032301

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Precision Measurements of the Nucleon Strange Form Factors atQ2∼0.1 GeV2

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