Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q{sup 2}=8.5 GeV{sup 2}

Journal Article · Fri Jun 18 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.242301· OSTI ID:21410419

Puckett, A J. R.; Bertozzi, W; Gilad, S; Huang, J; Moffit, B; Zhu, L ^[1]; Brash, E J ^[2]; Jones, M K; Bosted, P; Covrig, S; Ent, R; Fenker, H; Gaskell, D; Higinbotham, D W; Horn, T; Meekins, D; Smith, G; Wojtsekhowski, B B; Wood, S ^[3]; Luo, W ^[4]

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1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Christopher Newport University, Newport News, Virginia 23606 (United States)
3. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
4. Lanzhou University, Lanzhou 730000, Gansu (China)

Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon's quark constituents; indeed, recent proton data have attracted intense theoretical interest. In this Letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q{sup 2}=5.2, 6.7, and 8.5 GeV{sup 2}. By extending the range of Q{sup 2} for which G{sub E}{sup p} is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime.

• OSTI ID: 21410419
• Journal Information: Physical Review Letters, Vol. 104, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.104.242301; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BENCHMARKS
ELECTROMAGNETIC FORM FACTORS
EXPERIMENTAL DATA
GEV RANGE
MOMENTUM TRANSFER
POLARIZATION
PROTONS
QUARKS
RECOILS
STRONG INTERACTIONS
BARYONS
BASIC INTERACTIONS
DATA
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
HADRONS
INFORMATION
INTERACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE PROPERTIES