English
Related papers

Related papers: Proton G_E/G_M from beam-target asymmetry

200 papers

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)$^2$…

We report the most precise measurement to date of a parity-violating asymmetry in elastic electron-proton scattering. The measurement was carried out with a beam energy of 3.03 GeV and a scattering angle <theta_lab>=6 degrees, with the…

Nuclear Experiment · Physics 2012-08-27 The HAPPEX Collaboration

We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was…

The ratio of the proton elastic electromagnetic form factors, $G_{Ep}/G_{Mp}$, was obtained by measuring $P_{t}$ and $P_{\ell}$, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic $\vec e p…

Nuclear Experiment · Physics 2014-11-18 V. Punjabi , C. F. Perdrisat

Using data samples collected with the BESIII detector at the BEPCII collider, we measure the Born cross section of $e^{+}e^{-}\rightarrow p\bar{p}$ at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective…

High Energy Physics - Experiment · Physics 2015-06-17 M. Ablikim , M. N. Achasov , X. C. Ai , O. Albayrak , M. Albrecht , D. J. Ambrose , A. Amoroso , F. F. An , Q. An , J. Z. Bai , R. Baldini Ferroli , Y. Ban , D. W. Bennett , J. V. Bennett , M. Bertani , D. Bettoni , J. M. Bian , F. Bianchi , E. Boger , O. Bondarenko , I. Boyko , R. A. Briere , H. Cai , X. Cai , O. Cakir , A. Calcaterra , G. F. Cao , S. A. Cetin , J. F. Chang , G. Chelkov , G. Chen , H. S. Chen , H. Y. Chen , J. C. Chen , M. L. Chen , S. J. Chen , X. Chen , X. R. Chen , Y. B. Chen , H. P. Cheng , X. K. Chu , G. Cibinetto , D. Cronin-Hennessy , H. L. Dai , J. P. Dai , A. Dbeyssi , D. Dedovich , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , Y. Ding , C. Dong , J. Dong , L. Y. Dong , M. Y. Dong , S. X. Du , P. F. Duan , J. Z. Fan , J. Fang , S. S. Fang , X. Fang , Y. Fang , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , E. Fioravanti , M. Fritsch , C. D. Fu , Q. Gao , Y. Gao , Z. Gao , I. Garzia , C. Geng , K. Goetzen , W. X. Gong , W. Gradl , M. Greco , M. H. Gu , Y. T. Gu , Y. H. Guan , A. Q. Guo , L. B. Guo , Y. Guo , Y. P. Guo , Z. Haddadi , A. Hafner , S. Han , Y. L. Han , X. Q. Hao , F. A. Harris , K. L. He , Z. Y. He , T. Held , Y. K. Heng , Z. L. Hou , C. Hu , H. M. Hu , J. F. Hu , T. Hu , Y. Hu , G. M. Huang , G. S. Huang , H. P. Huang , J. S. Huang , X. T. Huang , Y. Huang , T. Hussain , Q. Ji , Q. P. Ji , X. B. Ji , X. L. Ji , L. L. Jiang , L. W. Jiang , X. S. Jiang , J. B. Jiao , Z. Jiao , D. P. Jin , S. Jin , T. Johansson , A. Julin , N. Kalantar-Nayestanaki , X. L. Kang , X. S. Kang , M. Kavatsyuk , B. C. Ke , R. Kliemt , B. Kloss , O. B. Kolcu , B. Kopf , M. Kornicer , W. Kuehn , A. Kupsc , W. Lai , J. S. Lange , M. Lara , P. Larin , C. Leng , C. H. Li , Cheng Li , D. M. Li , F. Li , G. Li , H. B. Li , J. C. Li , Jin Li , K. Li , K. Li , Lei Li , P. R. Li , T. Li , W. D. Li , W. G. Li , X. L. Li , X. M. Li , X. N. Li , X. Q. Li , Z. B. Li , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , D. X. Lin , B. J. Liu , C. X. Liu , F. H. Liu , Fang Liu , Feng Liu , H. B. Liu , H. H. Liu , H. H. Liu , H. M. Liu , J. Liu , J. P. Liu , J. Y. Liu , K. Liu , K. Y. Liu , L. D. Liu , P. L. Liu , Q. Liu , S. B. Liu , X. Liu , X. X. Liu , Y. B. Liu , Z. A. Liu , Zhiqiang Liu , Zhiqing Liu , H. Loehner , X. C. Lou , H. J. Lu , J. G. Lu , R. Q. Lu , Y. Lu , Y. P. Lu , C. L. Luo , M. X. Luo , T. Luo , X. L. Luo , M. Lv , X. R. Lyu , F. C. Ma , H. L. Ma , L. L. Ma , Q. M. Ma , S. Ma , T. Ma , X. N. Ma , X. Y. Ma , F. E. Maas , M. Maggiora , Q. A. Malik , Y. J. Mao , Z. P. Mao , S. Marcello , J. G. Messchendorp , J. Min , T. J. Min , R. E. Mitchell , X. H. Mo , Y. J. Mo , C. Morales Morales , K. Moriya , N. Yu. Muchnoi , H. Muramatsu , Y. Nefedov , F. Nerling , I. B. Nikolaev , Z. Ning , S. Nisar , S. L. Niu , X. Y. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , P. Patteri , M. Pelizaeus , H. P. Peng , K. Peters , J. L. Ping , R. G. Ping , R. Poling , Y. N. Pu , M. Qi , S. Qian , C. F. Qiao , L. Q. Qin , N. Qin , X. S. Qin , Y. Qin , Z. H. Qin , J. F. Qiu , K. H. Rashid , C. F. Redmer , H. L. Ren , M. Ripka , G. Rong , X. D. Ruan , V. Santoro , A. Sarantsev , M. Savrié , K. Schoenning , S. Schumann , W. Shan , M. Shao , C. P. Shen , P. X. Shen , X. Y. Shen , H. Y. Sheng , W. M. Song , X. Y. Song , S. Sosio , S. Spataro , G. X. Sun , J. F. Sun , S. S. Sun , Y. J. Sun , Y. Z. Sun , Z. J. Sun , Z. T. Sun , C. J. Tang , X. Tang , I. Tapan , E. H. Thorndike , M. Tiemens , D. Toth , M. Ullrich , I. Uman , G. S. Varner , B. Wang , B. L. Wang , D. Wang , D. Y. Wang , K. Wang , L. L. Wang , L. S. Wang , M. Wang , P. Wang , P. L. Wang , Q. J. Wang , S. G. Wang , W. Wang , X. F. Wang , Y. D. Wang , Y. F. Wang , Y. Q. Wang , Z. Wang , Z. G. Wang , Z. H. Wang , Z. Y. Wang , T. Weber , D. H. Wei , J. B. Wei , P. Weidenkaff , S. P. Wen , U. Wiedner , M. Wolke , L. H. Wu , Z. Wu , L. G. Xia , Y. Xia , D. Xiao , Z. J. Xiao , Y. G. Xie , Q. L. Xiu , G. F. Xu , L. Xu , Q. J. Xu , Q. N. Xu , X. P. Xu , Z. R. Xu , L. Yan , W. B. Yan , W. C. Yan , Y. H. Yan , H. X. Yang , L. Yang , Y. Yang , Y. X. Yang , H. Ye , M. Ye , M. H. Ye , J. H. Yin , B. X. Yu , C. X. Yu , H. W. Yu , J. S. Yu , C. Z. Yuan , W. L. Yuan , Y. Yuan , A. Yuncu , A. A. Zafar , A. Zallo , Y. Zeng , B. X. Zhang , B. Y. Zhang , C. Zhang , C. C. Zhang , D. H. Zhang , H. H. Zhang , H. Y. Zhang , J. J. Zhang , J. L. Zhang , J. Q. Zhang , J. W. Zhang , J. Y. Zhang , J. Z. Zhang , K. Zhang , L. Zhang , S. H. Zhang , X. Y. Zhang , Y. Zhang , Y. H. Zhang , Y. T. Zhang , Z. H. Zhang , Z. P. Zhang , Z. Y. Zhang , G. Zhao , J. W. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , Q. Zhao , Q. W. Zhao , S. J. Zhao , T. C. Zhao , Y. B. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , J. P. Zheng , W. J. Zheng , Y. H. Zheng , B. Zhong , L. Zhou , Li Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , X. Y. Zhou , K. Zhu , K. J. Zhu , S. Zhu , X. L. Zhu , Y. C. Zhu , Y. S. Zhu , Z. A. Zhu , J. Zhuang , L. Zotti , B. S. Zou , J. H. Zou

The ratio of the proton's elastic electromagnetic form factors $G_{Ep}/G_{Mp}$ was obtained by measuring $P_{t}$ and $P_{\ell}$, the transverse and longitudinal recoil proton polarization, respectively. For the elastic reaction $\vec e p…

Due to the inconsistency in the results of the GEp/Gmp ratio of the proton, as extracted from the Rosenbluth and recoil polarization techniques, high precision measurements of the e-p elastic scattering cross sections were made at Q^2 =…

Nuclear Experiment · Physics 2009-09-29 Issam A. Qattan

The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized electrons with unpolarized protons. The…

Nuclear Experiment · Physics 2008-11-26 The Jefferson Lab Hall A Collaboration , M. K. Jones

We report the results of a new Rosenbluth measurement of the proton form factors at Q^2 values of 2.64, 3.20 and 4.10 GeV^2. Cross sections were determined by detecting the recoiling proton in contrast to previous measurements in which the…

The electric form factor of the neutron was determined from measurements of the \vec{d}(\vec{e},e' n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia target in which the deuteron…

Nuclear Experiment · Physics 2008-11-26 G. Warren , F. R. Wesselmann , H. Zhu , D. Day , P. McKee , N. Savvinov , M. Zeier

We report a new measurement of the parity-violating asymmetry in elastic electron scattering from the proton at backward scattering angles. This asymmetry is sensitive to the strange magnetic form factor of the proton as well as electroweak…

Nuclear Experiment · Physics 2011-08-19 SAMPLE collaboration , D. T. Spayde

The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 GeV to be A_PV = -23.80 +/-…

The paper describes a precise measurement of electron scattering off the proton at momentum transfers of $0.003 \lesssim Q^2 \lesssim 1$\ GeV$^2$. The average point-to-point error of the cross sections in this experiment is $\sim$ 0.37%.…

We report the first measurement of the parity-violating asymmetry in elastic electron scattering from the proton. The asymmetry depends on the neutral weak magnetic form factor of the proton which contains new information on the…

The ratio of the electric and magnetic form factors of the proton, GEp/GMp, was measured at the Thomas Jefferson National Accelerator Facility (JLab) using the recoil polarization technique. The ratio of the form factors is directly…

Nuclear Experiment · Physics 2010-05-27 O. Gayou , E. J. Brash , M. K. Jones , C. F. Perdrisat , V. Punjabi , L. Pentchev , A. Kozlov

There is a significant discrepancy between the values of the proton electric form factor, $G_E^p$, extracted using unpolarized and polarized electron scattering. Calculations predict that small two-photon exchange (TPE) contributions can…

Nuclear Experiment · Physics 2015-06-23 D. Adikaram , D. Rimal , L. B. Weinstein , B. Raue , P. Khetarpal , R. P. Bennett , J. Arrington , W. K. Brooks , K. P. Adhikari , A. V. Afanasev , M. J. Amaryan , M. D. Anderson , J. Ball , M. Battaglieri , I. Bedlinskiy , A. S. Biselli , J. Bono , S. Boiarinov , W. J. Briscoe , V. D. Burkert , D. S. Carman , A. Celentano , S. Chandavar , G. Charles , L. Colaneri , P. L. Cole , M. Contalbrigo , A. D'Angelo , N. Dashyan , R. De Vita , E. De Sanctis , A. Deur , C. Djalali , G. E. Dodge , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , P. Eugenio , G. Fedotov , S. Fegan , A. Filippi , J. A. Fleming , A. Fradi , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , J. T. Goetz , W. Gohn , E. Golovatch , R. W. Gothe , K. A. Griffioen , M. Guidal , L. Guo , K. Hafidi , H. Hakobyan , N. Harrison , M. Hattawy , K. Hicks , M. Holtrop , S. M. Hughes , C. E. Hyde , Y. Ilieva , D. G. Ireland , B. S. Ishkhanov , D. Jenkins , H. Jiang , K. Joo , S. Joosten , M. Khandaker , W. Kim , A. Klein , F. J. Klein , S. Koirala , V. Kubarovsky , S. E. Kuhn , H. Y. Lu , I . J . D. MacGregor , N. Markov , M. Mayer , B. McKinnon , M. D. Mestayer , C. A. Meyer , M. Mirazita , V. Mokeev , R. A. Montgomery , C. I. Moody , H. Moutarde , A Movsisyan , C. Munoz Camacho , P. Nadel-Turonski , S. Niccolai , G. Niculescu , M. Osipenko , A. I. Ostrovidov , K. Park , E. Pasyuk , S. Pisano , O. Pogorelko , S. Procureur , Y. Prok , D. Protopopescu , A. J. R. Puckett , M. Ripani , A. Rizzo , G. Rosner , P. Rossi , F. Sabatié , D. Schott , R. A. Schumacher , Y. G. Sharabian , A. Simonyan , I. Skorodumina , E. S. Smith , G. D. Smith , D. I. Sober , N. Sparveris , S. Stepanyan , S. Strauch , V. Sytnik , M. Taiuti , Ye Tian , A. Trivedi , M. Ungaro , H. Voskanyan , E. Voutier , N. K. Walford , D. P. Watts , X. Wei , M. H. Wood , N. Zachariou , L. Zana , J. Zhang , Z. W. Zhao , I. Zonta , The CLAS Collaboration

The electromagnetic form factors of the nucleon characterize the effect of its internal structure on its response to an electromagnetic probe as studied in elastic electron-nucleon scattering. These form factors are functions of the squared…

Nuclear Experiment · Physics 2015-08-07 Andrew J. R. Puckett

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from the proton. The kinematic point (theta_lab = 12.3 degrees and Q^2=0.48 (GeV/c)^2) is chosen to provide sensitivity, at a level…

Nuclear Experiment · Physics 2010-05-27 HAPPEX Collaboration , K. A. Aniol
‹ Prev 1 2 3 10 Next ›