title: Measurement of the absolute n p scattering differential cross section at 194 MeV.
abstract: We describe a double-scattering experiment with a novel tagged neutron beam to measure differential cross sections for np backscattering to better than +/-2% absolute precision. The measurement focuses on angles and energies where the cross section magnitude and angle dependence constrain the charged pion-nucleon coupling constant, but existing data show serious discrepancies among themselves and with energy-dependent partial-wave analyses. The present results are in good accord with the partial-wave analyses, but deviate systematically from other recent measurements.
authors.affiliation: Indiana University Cyclotron Facility and Department of Physics, Bloomington, IN 47408, USA.
authors.forename: M
authors.initials: M
authors.lastname: Sarsour
authors.forename: T
authors.initials: T
authors.lastname: Peterson
authors.forename: M
authors.initials: M
authors.lastname: Planinic
authors.forename: S E
authors.initials: SE
authors.lastname: Vigdor
authors.forename: C
authors.initials: C
authors.lastname: Allgower
authors.forename: B
authors.initials: B
authors.lastname: Bergenwall
authors.forename: J
authors.initials: J
authors.lastname: Blomgren
authors.forename: T
authors.initials: T
authors.lastname: Hossbach
authors.forename: W W
authors.initials: WW
authors.lastname: Jacobs
authors.forename: C
authors.initials: C
authors.lastname: Johansson
authors.forename: J
authors.initials: J
authors.lastname: Klug
authors.forename: A V
authors.initials: AV
authors.lastname: Klyachko
authors.forename: P
authors.initials: P
authors.lastname: Nadel-Turonski
authors.forename: L
authors.initials: L
authors.lastname: Nilsson
authors.forename: N
authors.initials: N
authors.lastname: Olsson
authors.forename: S
authors.initials: S
authors.lastname: Pomp
authors.forename: J
authors.initials: J
authors.lastname: Rapaport
authors.forename: T
authors.initials: T
authors.lastname: Rinckel
authors.forename: E J
authors.initials: EJ
authors.lastname: Stephenson
authors.forename: U
authors.initials: U
authors.lastname: Tippawan
authors.forename: S W
authors.initials: SW
authors.lastname: Wissink
authors.forename: Y
authors.initials: Y
authors.lastname: Zhou