Proton Form Factor Ratio, $\mu_p G_E^p/G_M^p$ from Double Spin Asymmetry
Proton Form Factor Ratio, $\mu_p G_E^p/G_M^p$ from Double Spin Asymmetry
The ratio of the electric and magnetic form factor of the proton, $\mu_p G_E^p/G_M^p$, has been measured for elastic electron-proton scattering with polarized beam and target up to four-momentum transfer squared, $Q^2=5.66$ (GeV/c)$^2$ using the double spin asymmetry for target spin orientation aligned nearly perpendicular to the beam momentum direction. This measurement of $\mu_p G_E^p/G_M^p$ agrees with the $Q^2$ dependence of previous recoil polarization data and reconfirms the discrepancy at high $Q^2$ between the Rosenbluth and the polarization-transfer method with a different measurement technique and systematic uncertainties uncorrelated to those of the recoil-polarization measurements. The form factor ratio at $Q^2$=2.06 (GeV/c)$^2$ has been measured as $\mu_p G_E^p/G_M^p = 0.720 \pm 0.176_{stat} \pm 0.039_{sys}$, which is in agreement with an earlier measurement with the polarized target technique at similar kinematics. The form factor ratio at $Q^2$=5.66 (GeV/c)$^2$ has been determined as $\mu_p G_E^p/G_M^p=0.244\pm0.353_{stat}\pm0.013_{sys}$, which represents the highest $Q^2$ reach with the double spin asymmetry with polarized target to date.
B. Sawatzky、L. Pentchev、P. Markowitz、J. Dunne、M. Kohl、D. Gaskell、D. Pocanic、Z-E. Meziani、J. Gomez、P. M. King、W. Armstrong、D. Crabb、M. K. Jones、R. Ent、M. Khandaker、C. Butuceanu、J. Reinhold、D. Higinbotham、H. Mkrtchyan、M. Veilleux、O. A. Rondo'n、S. Riordan、T. Horn、C. Chen、Y. Li、N. Liyanage、O. Ates、J. Maxwell、A. Asaturyan、P. Carter、A. N. Vasiliev、A. Puckett、A. Mkrtchyan、H. Yao、L. F. Soloviev、C. Keppel、P. Bosted、V. Kubarovsky、J. German、Nuruzzaman、Y. M. Melnik、G. Smith、D. Kawama、M. Bychkov、D. Day、J. Mulholland、A. Daniel、L. Ndukum、N. Kalantarians、I. Albayrak、L. Tang、V. Tadevosyan、A. Deur、E. Frlez、A. Liyanage、H. Baghdasaryan、D. Dutta、K. Kovacs、G. M. Huber、E. Christy、P. Monaghan、M. Posik、R. Gilman、S. Choi、M. Jones、C. Ellis、J. Roche、S. N. Nakamura、X. Qiu、E. Brash、P. Solvignon、Y. M. Goncharenko、A. Narayan、Y. Kim、H-K. Kang、B. Davis、F. Wesselmann、A. Ahmidouch、W. Boeglin、Z. Ye、M. Elaasar、O. Hashimoto、T. Walton、S. Danagoulian、S. Covrig、T. Gogami、O. Geagla、A. M. Davidenko、W. Deconinck、L. Zhu、K. Slifer、D. Flay、H. Kang、J-P. Chen、M. Shabestari、V. V. Mochalov、S. A. Wood、V. Mamyan、T. Maruta、L. El Fassi
物理学粒子探测技术、辐射探测技术、核仪器仪表
B. Sawatzky,L. Pentchev,P. Markowitz,J. Dunne,M. Kohl,D. Gaskell,D. Pocanic,Z-E. Meziani,J. Gomez,P. M. King,W. Armstrong,D. Crabb,M. K. Jones,R. Ent,M. Khandaker,C. Butuceanu,J. Reinhold,D. Higinbotham,H. Mkrtchyan,M. Veilleux,O. A. Rondo'n,S. Riordan,T. Horn,C. Chen,Y. Li,N. Liyanage,O. Ates,J. Maxwell,A. Asaturyan,P. Carter,A. N. Vasiliev,A. Puckett,A. Mkrtchyan,H. Yao,L. F. Soloviev,C. Keppel,P. Bosted,V. Kubarovsky,J. German,Nuruzzaman,Y. M. Melnik,G. Smith,D. Kawama,M. Bychkov,D. Day,J. Mulholland,A. Daniel,L. Ndukum,N. Kalantarians,I. Albayrak,L. Tang,V. Tadevosyan,A. Deur,E. Frlez,A. Liyanage,H. Baghdasaryan,D. Dutta,K. Kovacs,G. M. Huber,E. Christy,P. Monaghan,M. Posik,R. Gilman,S. Choi,M. Jones,C. Ellis,J. Roche,S. N. Nakamura,X. Qiu,E. Brash,P. Solvignon,Y. M. Goncharenko,A. Narayan,Y. Kim,H-K. Kang,B. Davis,F. Wesselmann,A. Ahmidouch,W. Boeglin,Z. Ye,M. Elaasar,O. Hashimoto,T. Walton,S. Danagoulian,S. Covrig,T. Gogami,O. Geagla,A. M. Davidenko,W. Deconinck,L. Zhu,K. Slifer,D. Flay,H. Kang,J-P. Chen,M. Shabestari,V. V. Mochalov,S. A. Wood,V. Mamyan,T. Maruta,L. El Fassi.Proton Form Factor Ratio, $\mu_p G_E^p/G_M^p$ from Double Spin Asymmetry[EB/OL].(2018-06-28)[2025-05-25].https://arxiv.org/abs/1806.11156.点此复制
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