title: First Measurement of the Gerasimov-Drell-Hearn Sum Rule for 1H from 0.7 to 1.8 GeV at ELSA.
abstract: To verify the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the first time experimentally, we measured the helicity dependent total photoabsorption cross section with circularly polarized real photons and longitudinally polarized nucleons in the photon energy range 0.68-1.82 GeV with the tagged photon facility at ELSA. The experiment was carried out with a 4pi detection system, a circularly polarized tagged photon beam, and a frozen spin polarized proton target. The contribution to the GDH sum rule in this photon energy range is [49.9+/-2.4(stat)+/-2.2(syst)] microb.
authors: Physikalisches Institut, Universität Bonn, D-53115 Bonn, Germany.
authors: H
authors: H
authors: Dutz
authors: K
authors: K
authors: Helbing
authors: J
authors: J
authors: Krimmer
authors: T
authors: T
authors: Speckner
authors: G
authors: G
authors: Zeitler
authors: J
authors: J
authors: Ahrens
authors: S
authors: S
authors: Altieri
authors: J R M
authors: JR
authors: Annand
authors: G
authors: G
authors: Anton
authors: H-J
authors: HJ
authors: Arends
authors: R
authors: R
authors: Beck
authors: A
authors: A
authors: Bock
authors: C
authors: C
authors: Bradtke
authors: A
authors: A
authors: Braghieri
authors: W
authors: W
authors: v  Drachenfels
authors: F
authors: F
authors: Frommberger
authors: M
authors: M
authors: Godo
authors: S
authors: S
authors: Goertz
authors: P
authors: P
authors: Grabmayr
authors: S
authors: S
authors: Hasegawa
authors: K
authors: K
authors: Hansen
authors: J
authors: J
authors: Harmsen
authors: E
authors: E
authors: Heid
authors: W
authors: W
authors: Hillert
authors: H
authors: H
authors: Holvoet
authors: N
authors: N
authors: Horikawa
authors: T
authors: T
authors: Iwata
authors: L
authors: L
authors: Van Hoorebeke
authors: N
authors: N
authors: d'Hose
authors: P
authors: P
authors: Jennewein
authors: B
authors: B
authors: Kiel
authors: F
authors: F
authors: Klein
authors: R
authors: R
authors: Kondratiev
authors: M
authors: M
authors: Lang
authors: B
authors: B
authors: Lannoy
authors: R
authors: R
authors: Leukel
authors: V
authors: V
authors: Lisin
authors: D
authors: D
authors: Menze
authors: W
authors: W
authors: Meyer
authors: T
authors: T
authors: Michel
authors: J
authors: J
authors: Naumann
authors: A
authors: A
authors: Panzeri
authors: P
authors: P
authors: Pedroni
authors: T
authors: T
authors: Pinelli
authors: I
authors: I
authors: Preobrajenski
authors: E
authors: E
authors: Radtke
authors: G
authors: G
authors: Reicherz
authors: C
authors: C
authors: Rohlof
authors: T
authors: T
authors: Rostomyan
authors: M
authors: M
authors: Sauer
authors: B
authors: B
authors: Schoch
authors: M
authors: M
authors: Schumacher
authors: G
authors: G
authors: Tamas
authors: A
authors: A
authors: Thomas
authors: R
authors: R
authors: van de Vyver
authors: W
authors: W
authors: Weihofen
authors: F
authors: F
authors: Zapadtka