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Determination of the Pion Charge Form Factor at Q{sup 2}=1.60 and 2.45 (GeV/c){sup 2}

Journal Article · · Physical Review Letters
; ; ; ; ; ;  [1]; ;  [2]; ; ; ; ;  [3]; ;  [4]; ;  [5]; ;  [6]
  1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
  2. California State University Los Angeles, Los Angeles, California 90032 (United States)
  3. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  4. Saint Mary's University, Halifax, Nova Scotia, B3H 3C3 (Canada)
  5. Vrije Universiteit, NL-1081 HV Amsterdam (Netherlands)
  6. Florida International University, University Park, Florida 33199 (United States)
+ Show Author Affiliations
The {sup 1}H(e,e{sup '}{pi}{sup +})n cross section was measured at four-momentum transfers of Q{sup 2}=1.60 and 2.45 GeV{sup 2} at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F{sub {pi}}) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F{sub {pi}} is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q{sup 2} by one sigma, but is still far from its perturbative quantum chromodynamics prediction.
OSTI ID:
20861098
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELECTRON REACTIONS
ELECTROPRODUCTION
FORM FACTORS
FOUR MOMENTUM TRANSFER
GEV RANGE 01-10
HYDROGEN 1 TARGET
MASS
NUCLEONS
PHOTONS
PIONS PLUS
QUANTUM CHROMODYNAMICS
REGGE CALCULUS