title: Recoil polarization measurements of the proton electromagnetic form factor ratio to Q2 = 8.5  GeV2.
abstract: 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 Q2=5.2, 6.7, and 8.5  GeV2. By extending the range of Q2 for which G(E)(p) is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime.
authors.affiliation: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A J R
authors.initials: AJ
authors.lastname: Puckett
authors.forename: E J
authors.initials: EJ
authors.lastname: Brash
authors.forename: M K
authors.initials: MK
authors.lastname: Jones
authors.forename: W
authors.initials: W
authors.lastname: Luo
authors.forename: M
authors.initials: M
authors.lastname: Meziane
authors.forename: L
authors.initials: L
authors.lastname: Pentchev
authors.forename: C F
authors.initials: CF
authors.lastname: Perdrisat
authors.forename: V
authors.initials: V
authors.lastname: Punjabi
authors.forename: F R
authors.initials: FR
authors.lastname: Wesselmann
authors.forename: A
authors.initials: A
authors.lastname: Ahmidouch
authors.forename: I
authors.initials: I
authors.lastname: Albayrak
authors.forename: K A
authors.initials: KA
authors.lastname: Aniol
authors.forename: J
authors.initials: J
authors.lastname: Arrington
authors.forename: A
authors.initials: A
authors.lastname: Asaturyan
authors.forename: H
authors.initials: H
authors.lastname: Baghdasaryan
authors.forename: F
authors.initials: F
authors.lastname: Benmokhtar
authors.forename: W
authors.initials: W
authors.lastname: Bertozzi
authors.forename: L
authors.initials: L
authors.lastname: Bimbot
authors.forename: P
authors.initials: P
authors.lastname: Bosted
authors.forename: W
authors.initials: W
authors.lastname: Boeglin
authors.forename: C
authors.initials: C
authors.lastname: Butuceanu
authors.forename: P
authors.initials: P
authors.lastname: Carter
authors.forename: S
authors.initials: S
authors.lastname: Chernenko
authors.forename: E
authors.initials: E
authors.lastname: Christy
authors.forename: M
authors.initials: M
authors.lastname: Commisso
authors.forename: J C
authors.initials: JC
authors.lastname: Cornejo
authors.forename: S
authors.initials: S
authors.lastname: Covrig
authors.forename: S
authors.initials: S
authors.lastname: Danagoulian
authors.forename: A
authors.initials: A
authors.lastname: Daniel
authors.forename: A
authors.initials: A
authors.lastname: Davidenko
authors.forename: D
authors.initials: D
authors.lastname: Day
authors.forename: S
authors.initials: S
authors.lastname: Dhamija
authors.forename: D
authors.initials: D
authors.lastname: Dutta
authors.forename: R
authors.initials: R
authors.lastname: Ent
authors.forename: S
authors.initials: S
authors.lastname: Frullani
authors.forename: H
authors.initials: H
authors.lastname: Fenker
authors.forename: E
authors.initials: E
authors.lastname: Frlez
authors.forename: F
authors.initials: F
authors.lastname: Garibaldi
authors.forename: D
authors.initials: D
authors.lastname: Gaskell
authors.forename: S
authors.initials: S
authors.lastname: Gilad
authors.forename: R
authors.initials: R
authors.lastname: Gilman
authors.forename: Y
authors.initials: Y
authors.lastname: Goncharenko
authors.forename: K
authors.initials: K
authors.lastname: Hafidi
authors.forename: D
authors.initials: D
authors.lastname: Hamilton
authors.forename: D W
authors.initials: DW
authors.lastname: Higinbotham
authors.forename: W
authors.initials: W
authors.lastname: Hinton
authors.forename: T
authors.initials: T
authors.lastname: Horn
authors.forename: B
authors.initials: B
authors.lastname: Hu
authors.forename: J
authors.initials: J
authors.lastname: Huang
authors.forename: G M
authors.initials: GM
authors.lastname: Huber
authors.forename: E
authors.initials: E
authors.lastname: Jensen
authors.forename: C
authors.initials: C
authors.lastname: Keppel
authors.forename: M
authors.initials: M
authors.lastname: Khandaker
authors.forename: P
authors.initials: P
authors.lastname: King
authors.forename: D
authors.initials: D
authors.lastname: Kirillov
authors.forename: M
authors.initials: M
authors.lastname: Kohl
authors.forename: V
authors.initials: V
authors.lastname: Kravtsov
authors.forename: G
authors.initials: G
authors.lastname: Kumbartzki
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: V
authors.initials: V
authors.lastname: Mamyan
authors.forename: D J
authors.initials: DJ
authors.lastname: Margaziotis
authors.forename: A
authors.initials: A
authors.lastname: Marsh
authors.forename: Y
authors.initials: Y
authors.lastname: Matulenko
authors.forename: J
authors.initials: J
authors.lastname: Maxwell
authors.forename: G
authors.initials: G
authors.lastname: Mbianda
authors.forename: D
authors.initials: D
authors.lastname: Meekins
authors.forename: Y
authors.initials: Y
authors.lastname: Melnik
authors.forename: J
authors.initials: J
authors.lastname: Miller
authors.forename: A
authors.initials: A
authors.lastname: Mkrtchyan
authors.forename: H
authors.initials: H
authors.lastname: Mkrtchyan
authors.forename: B
authors.initials: B
authors.lastname: Moffit
authors.forename: O
authors.initials: O
authors.lastname: Moreno
authors.forename: J
authors.initials: J
authors.lastname: Mulholland
authors.forename: A
authors.initials: A
authors.lastname: Narayan
authors.forename: S
authors.initials: S
authors.lastname: Nedev
authors.lastname: Nuruzzaman
authors.forename: E
authors.initials: E
authors.lastname: Piasetzky
authors.forename: W
authors.initials: W
authors.lastname: Pierce
authors.forename: N M
authors.initials: NM
authors.lastname: Piskunov
authors.forename: Y
authors.initials: Y
authors.lastname: Prok
authors.forename: R D
authors.initials: RD
authors.lastname: Ransome
authors.forename: D S
authors.initials: DS
authors.lastname: Razin
authors.forename: P
authors.initials: P
authors.lastname: Reimer
authors.forename: J
authors.initials: J
authors.lastname: Reinhold
authors.forename: O
authors.initials: O
authors.lastname: Rondon
authors.forename: M
authors.initials: M
authors.lastname: Shabestari
authors.forename: A
authors.initials: A
authors.lastname: Shahinyan
authors.forename: K
authors.initials: K
authors.lastname: Shestermanov
authors.forename: S
authors.initials: S
authors.lastname: Sirca
authors.forename: I
authors.initials: I
authors.lastname: Sitnik
authors.forename: L
authors.initials: L
authors.lastname: Smykov
authors.forename: G
authors.initials: G
authors.lastname: Smith
authors.forename: L
authors.initials: L
authors.lastname: Solovyev
authors.forename: P
authors.initials: P
authors.lastname: Solvignon
authors.forename: R
authors.initials: R
authors.lastname: Subedi
authors.forename: E
authors.initials: E
authors.lastname: Tomasi-Gustafsson
authors.forename: A
authors.initials: A
authors.lastname: Vasiliev
authors.forename: M
authors.initials: M
authors.lastname: Veilleux
authors.forename: B B
authors.initials: BB
authors.lastname: Wojtsekhowski
authors.forename: S
authors.initials: S
authors.lastname: Wood
authors.forename: Z
authors.initials: Z
authors.lastname: Ye
authors.forename: Y
authors.initials: Y
authors.lastname: Zanevsky
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Zheng
authors.forename: L
authors.initials: L
authors.lastname: Zhu