Measurement of G{sub E{sub p}}/G{sub M{sub p}} in {rvec e}p {yields} e{sup {rvec p}} to Q{sup 2} = 5.6 GeV{sup 2}

Journal Article · Mon Mar 04 00:00:00 EST 2002 · Physical Review Letters

OSTI ID:837861

Kozlov, A; Perdrisat, Charles; Brash, Edward; Pentchev, Lubomir; Jones, Mark; Gayou, Olivier; Punjabi, Vina

The ratio of the electric and magnetic form factors of the proton, G{sub E{sub p}}/G{sub M{sub p}}, was measured at the Thomas Jefferson National Accelerator Facility (JLab) using the recoil polarization technique. The ratio of the form factors is directly proportional to the ratio of the transverse to longitudinal components of the polarization of the recoil proton in the elastic {rvec e}p {yields} e{sup {rvec p}} reaction. The new data presented in this article span the range 3.5 < Q{sup 2} < 5.6 GeV{sup 2} and are well described by a linear Q{sup 2} fit. Also, the ratio {radical}Q{sup 2} F{sub 2{sub p}}/F{sub 1{sub p}} reaches a constant value above Q{sup 2} = 2 GeV{sup 2}.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 837861
• Report Number(s): JLAB-PHY-01-63; DOE/ER/40150-3206; nucl-ex/0111010; TRN: US0501123
• Journal Information: Physical Review Letters, Vol. 88, Issue 9; Other Information: Submitted to Physical Review Letters: Volume 88, No.9; PBD: 4 Mar 2002
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CEBAF ACCELERATOR
FORM FACTORS
POLARIZATION
PROTONS