在Q2 = 0.5和1.0 GeV2/c2条件下对中子电形状因子的测量。
Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2.
作者信息
Warren G, Wesselmann F, Zhu H, McKee P, Savvinov N, Zeier M, Aghalaryan A, Ahmidouch A, Arenhövel H, Asaturyan R, Ben-Dayan I, Bloch F, Boeglin W, Boillat B, Breuer H, Brower J, Carasco C, Carl M, Carlini R, Cha J, Chant N, Christy E, Cole L, Coman L, Coman M, Crabb D, Danagoulian S, Day D, Duek K, Dunne J, Elaasar M, Ent R, Farrell J, Fatemi R, Fawcett D, Fenker H, Forest T, Garrow K, Gasparian A, Goussev I, Gueye P, Harvey M, Hauger M, Herrera R, Hu B, Jaegle I, Jones M, Jourdan J, Keith C, Kelly J, Keppel C, Khandaker M, Klein A, Klimenko A, Kramer L, Krusche B, Kuhn S, Liang Y, Lichtenstadt J, Lindgren R, Liu J, Lung A, Mack D, Maclachlan G, Markowitz P, McNulty D, Meekins D, Mitchell J, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Opper A, Piasetzky E, Pierce J, Pitt M, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondon O, Sacker D, Sawatzky B, Seely M, Sick I, Simicevic N, Smith C, Smith G, Steinacher M, Stepanyan S, Stout J, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Vlahovic B, Vulcan B, Wang K, Wells S, Woehrle H, Wood S, Yan C, Yanay Y, Yuan L, Yun J, Zihlmann B
机构信息
Universität Basel, CH-4056 Basel, Switzerland.
出版信息
Phys Rev Lett. 2004 Jan 30;92(4):042301. doi: 10.1103/PhysRevLett.92.042301. Epub 2004 Jan 29.
The electric form factor of the neutron was determined from measurements of the d-->(e-->,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
中子的电形状因子是通过对准弹性运动学的d-->(e-->,e'n)p反应进行测量来确定的。极化电子从极化的氘化氨（15ND3）靶上散射，其中氘核极化垂直于动量转移。散射电子在磁谱仪中被探测到，并与大立体角探测器中的中子符合测量。我们分别在Q(2)=0.5和1.0 (GeV/c)(2)时得到G(n)(E)=0.0526±0.0033(统计)±0.0026(系统)和0.0454±0.0054±0.0037。
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