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Dive into the research topics where S. Churchwell is active.

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Featured researches published by S. Churchwell.


European Physical Journal C | 2003

Measurement of the neutron electric form factor via recoil polarimetry

T. Reichelt; X. Zhu; R. Asaturian; H. Breuer; P. E. Ulmer; John C. Mitchell; E. Christy; D. Day; W. Vulcan; C. Keppel; H. Arenhövel; S. Wells; V. Punjabi; L. Gan; S. Taylor; S. Tajima; S. Danagulian; R. Ent; W. Kim; M. Elaasar; J. Roche; C. Yan; J. J. Kelly; P. Markowitz; M. Khandaker; B. A. Raue; E. Crouse; S. Churchwell; L. Cole; B. D. Anderson

Abstract.The ratio Gen/Gmn of the electric to the magnetic form factor of the neutron has been measured by analyzing the polarization of the recoiling neutron in quasi-elastic scattering of longitudinally polarized electrons from deuterium at the Q2 values of 0.45, 1.15, and 1.47 (GeV/c)2. The experiment has been performed in Hall C of the Thomas Jefferson National Accelerator Facility. With Gmn being known Gen can be deduced. The preliminary results show that the lowest Q2 points follow the Galster parametrization and that the 1.47 (GeV/c)2 point rises above this parametrization.


Archive | 1999

Exclusive Compton Scattering on the Proton

J. P. Chen; E. Chudakov; C. DeJager; P. V. Degtyarenko; R. Ent; Jonatan Piedra Gomez; O. Hansen; C. Keppel; F. Klein; M. Kuss; J. J. LeRose; M. Liang; R. Michaels; John C. Mitchell; N. Liyanage; P. M. Rutt; A. Saha; B. Wojtsekhowski; M. Bouwhuis; Th Chang; R. J. Holt; Alan M. Nathan; M. Roedelbronn; K. Wijesooriya; S. E. Williamson; G. E. Dodge; C. E. Hyde-Wright; A. Radyushkin; F. Sabatié; L. B. Weinstein

An experiment is proposed to measure the cross sections for Real Compton Scattering from the proton in the energy range 3-6 GeV and over a wide angular range; and to measure the longitudinal and transverse components of the polarization transfer to the recoil proton at a single kinematic point. Together; these measurements will test models of the reaction mechanism and determine new structure functions of the proton that are related to the same nonforward parton densities that determine the elastic electron scattering form factors and the parton densities. The experiment utilizes an untagged bremsstrahlung photon beam and the standard Hall A cryogenic targets. The scattered photon is detected in a photon spectrometer; currently under construction. The coincident recoil proton is detected in one of the Hall A magnetic spectrometers and its polarization components are measured in the existing Focal Plane Polarimeter. This proposal extends and supercedes E97-108 which was approved by PAC13.


Physical Review Letters | 2003

Measurements of G(E)n / G(M)n from the H-2(polarized-e,e-prime polarized-n) reaction to Q**2 = 1.45 (GeV/c)**2

R. Madey; Andrei Semenov; S. Taylor; B. Plaster; A. Aghalaryan; E. Crouse; G. MacLachlan; S. Tajima; W. Tireman; C. Yan; A. Ahmidouch; B. D. Anderson; H. Arenhövel; R. Asaturyan; Oliver Keith Baker; A.R. Baldwin; D. Barkhuff; H. Breuer; R. Carlini; E. Christy; S. Churchwell; L. Cole; S. Danagoulian; D. Day; T. Eden; M. Elaasar; R. Ent; M. Farkhondeh; H. Fenker; John M. Finn


Physical Review Letters | 2000

Transverse Asymmetry AT 000 from the Quasielastic 3 He e, e 0 Process and the Neutron Magnetic Form Factor

W. Xu; D. Dutta; F. Xiong; B. D. Anderson; L. Auberbach; T. Averett; W. Bertozzi; J. R. Calarco; L. Cardman; G. D. Cates; Z. Chai; J. P. Chen; S. Choi; E. Chudakov; S. Churchwell; G.S. Corrado; C. Crawford; D. Dale; A. Deur; P. Djawotho; Bradley Filippone; John M. Finn; H. Gao; R. Gilman; A. Glamazdin; C. Glashausser; W. Glöckle; J. Golak; Jonatan Piedra Gomez; V. Gorbenko


Physical Review Letters | 2001

Polarization Measurements in High-Energy Deuteron Photodisintegration

K Wijesooriya; A Afanasev; M Amarian; K Aniol; S Becher; K Benslama; L. Bimbot; P Bosted; E Brash; J Calarco; Z Chai; Carolina Chang; T.-H. Chang; Jian-Ping Chen; S Choi; E Chudakov; S. Churchwell; D. Crovelli; S Dieterich; S. Dumalski; D. Dutta; M Epstein; K Fissum; B Fox; S Frullani; H. Gao; J Gao; F Garibaldi; O Gayou; R. Gilman


Physical Review C | 2005

Measurements of the neutron electric to magnetic form-factor ratio G(En) / G(Mn) via the H-2(polarized-e, e-prime,polarized-n)H-1 reaction to Q**2 = 1.45-(GeV/c)**2

B. Plaster; P. E. Ulmer; X. Zhu; H. Breuer; C.R. Howell; H. Mkrtchyan; T. Eden; E. Christy; D. Day; W. Vulcan; C. Keppel; M. Farkhondeh; A. Gasparian; S. Wells; V. Tadevosyan; V. Punjabi; L. Gan; S. Taylor; S. Tajima; A.R. Baldwin; R. Ent; M. Elaasar; J. Roche; N. Savvinov; W. Kim; J. J. Kelly; P. Markowitz; M. Khandaker; B. A. Raue; E. Crouse


Physical Review Letters | 2001

Precision measurement of the spin dependent asymmetry in the threshold region of polarized He-3(polarized-e, e-prime)

F. Xiong; R. Kahl; C. F. Williamson; Richard Holmes; Z. Chai; T. Averett; E. Chudakov; R. Pomatsalyuk; W. Xu; D. Dutta; D. Pripstein; B. Humensky; W. Bertozzi; T. Pavlin; B. Vlahovic; A. Deur; M. Liang; R. Suleiman; M. K. Jones; Jian-Ping Chen; Y. Roblin; C. W. de Jager; J. Golak; F. W. Hersman; K. McCormick; Henryk Witala; W. Korsch; C. Crawford; M. Rvachev; John M. Finn


Physical Review Letters | 2000

The Transverse Asymmetry

W. Xu; Jonatan Piedra Gomez; E. Pace; J.J. Le Rose; I. Kominis; F. W. Hersman; J.W. Martin; M. Schnee; R. Suleiman; S. Nanda; W. Glöckle; John C. Mitchell; Richard Holmes; R. D. Ransome; L. Todor; W. Bertozzi; B. D. Anderson; A. Deur; A. Glamazdin; E. Lakuriqi; K. McIlhany; J. R. Calarco; D. L. Prout; M. Sutter; J. Golak; M. Rvachev; K. Slifer; E. Chudakov; T. Pavlin; R. Pomatsalyuk


Physical Review C | 2006

A_{T'}

B. Plaster; A.Yu. Semenov; A. Aghalaryan; E. Crouse; G. MacLachlan; S. Tajima; W. Tireman; A. Ahmidouch; B. D. Anderson; H. Arenhövel; R. Asaturyan; Oliver Keith Baker; A.R. Baldwin; D. Barkhuff; H. Breuer; R. Carlini; E. Christy; S. Churchwell; L. Cole; S. Danagoulian; D. Day; T. Eden; M. Elaasar; R. Ent; M. Farkhondeh; H. Fenker; John M. Finn; L. Gan; A. Gasparian; K. Garrow


Proceedings of the 9th International Conference on the Structure of Baryons | 2003

from Quasi-elastic

R. Madey; Andrei Semenov; Simon Taylor; A. Aghalaryan; E. Crouse; G. MacLachlan; B. Plaster; Shigeyuki Tajima; W. Tireman; C. Yan; Abdellah Ahmidouch; Brian Anderson; R. Asaturyan; Oliver Keith Baker; Alan Baldwin; H. Breuer; R. Carlini; M. E. Christy; S. Churchwell; L. Cole; S. Danagoulian; D. Day; M. Elaasar; R. Ent; M. Farkhondeh; H. Fenker; John M. Finn; L. Gan; K. Garrow; P. Gueye

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John M. Finn

Los Alamos National Laboratory

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E. Chudakov

Thomas Jefferson National Accelerator Facility

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A. Deur

Thomas Jefferson National Accelerator Facility

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D. Dutta

Mississippi State University

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R. Ent

Thomas Jefferson National Accelerator Facility

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W. Bertozzi

Massachusetts Institute of Technology

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J. Golak

Jagiellonian University

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D. Day

University of Virginia

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