title: Determination of the pion charge form factor at Q2=1.60 and 2.45 (GeV/c)2.
abstract: The 1H(e,e'pi+)n cross section was measured at four-momentum transfers of Q2=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F(pi)) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F(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 Q2 by one sigma, but is still far from its perturbative quantum chromodynamics prediction.
authors.affiliation: Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: T
authors.initials: T
authors.lastname: Horn
authors.forename: K
authors.initials: K
authors.lastname: Aniol
authors.forename: J
authors.initials: J
authors.lastname: Arrington
authors.forename: B
authors.initials: B
authors.lastname: Barrett
authors.forename: E J
authors.initials: EJ
authors.lastname: Beise
authors.forename: H P
authors.initials: HP
authors.lastname: Blok
authors.forename: W
authors.initials: W
authors.lastname: Boeglin
authors.forename: E J
authors.initials: EJ
authors.lastname: Brash
authors.forename: H
authors.initials: H
authors.lastname: Breuer
authors.forename: C C
authors.initials: CC
authors.lastname: Chang
authors.forename: M E
authors.initials: ME
authors.lastname: Christy
authors.forename: R
authors.initials: R
authors.lastname: Ent
authors.forename: D
authors.initials: D
authors.lastname: Gaskell
authors.forename: E
authors.initials: E
authors.lastname: Gibson
authors.forename: R J
authors.initials: RJ
authors.lastname: Holt
authors.forename: G M
authors.initials: GM
authors.lastname: Huber
authors.forename: S
authors.initials: S
authors.lastname: Jin
authors.forename: M K
authors.initials: MK
authors.lastname: Jones
authors.forename: C E
authors.initials: CE
authors.lastname: Keppel
authors.forename: W
authors.initials: W
authors.lastname: Kim
authors.forename: P M
authors.initials: PM
authors.lastname: King
authors.forename: V
authors.initials: V
authors.lastname: Kovaltchouk
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: G J
authors.initials: GJ
authors.lastname: Lolos
authors.forename: D J
authors.initials: DJ
authors.lastname: Mack
authors.forename: D J
authors.initials: DJ
authors.lastname: Margaziotis
authors.forename: P
authors.initials: P
authors.lastname: Markowitz
authors.forename: A
authors.initials: A
authors.lastname: Matsumura
authors.forename: D
authors.initials: D
authors.lastname: Meekins
authors.forename: T
authors.initials: T
authors.lastname: Miyoshi
authors.forename: H
authors.initials: H
authors.lastname: Mkrtchyan
authors.forename: I
authors.initials: I
authors.lastname: Niculescu
authors.forename: Y
authors.initials: Y
authors.lastname: Okayasu
authors.forename: L
authors.initials: L
authors.lastname: Pentchev
authors.forename: C
authors.initials: C
authors.lastname: Perdrisat
authors.forename: D
authors.initials: D
authors.lastname: Potterveld
authors.forename: V
authors.initials: V
authors.lastname: Punjabi
authors.forename: P
authors.initials: P
authors.lastname: Reimer
authors.forename: J
authors.initials: J
authors.lastname: Reinhold
authors.forename: J
authors.initials: J
authors.lastname: Roche
authors.forename: P G
authors.initials: PG
authors.lastname: Roos
authors.forename: A
authors.initials: A
authors.lastname: Sarty
authors.forename: G R
authors.initials: GR
authors.lastname: Smith
authors.forename: V
authors.initials: V
authors.lastname: Tadevosyan
authors.forename: L G
authors.initials: LG
authors.lastname: Tang
authors.forename: V
authors.initials: V
authors.lastname: Tvaskis
authors.forename: S
authors.initials: S
authors.lastname: Vidakovic
authors.forename: J
authors.initials: J
authors.lastname: Volmer
authors.forename: W
authors.initials: W
authors.lastname: Vulcan
authors.forename: G
authors.initials: G
authors.lastname: Warren
authors.forename: S A
authors.initials: SA
authors.lastname: Wood
authors.forename: C
authors.initials: C
authors.lastname: Xu
authors.forename: X
authors.initials: X
authors.lastname: Zheng