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First measurement of target and double spin asymmetries for ep -> ep pi(0) in the nucleon resonance region above the Delta(1232)
Physical Review C (2008)
  • AS Biselli
  • VD Burkert
  • MJ Amaryan
  • G Asryan
  • H Avakian
  • H Bagdasaryan
  • N Baillie
  • JP Ball
  • NA Baltzell
  • M Battaglieri
  • I Bedlinskiy
  • M Bellis
  • N Benmouna
  • BL Berman
  • L Blaszczyk
  • C Bookwalter
  • S Boiarinov
  • P Bosted
  • R Bradford
  • D Branford
  • WJ Briscoe
  • WK Brooks
  • S Bultmann
  • C Butuceanu
  • JR Calarco
  • SL Careccia
  • DS Carman
  • L Casey
  • S Chen
  • L Cheng
  • PL Cole
  • P Collins
  • P Coltharp
  • D Crabb
  • V Crede
  • D Dale
  • N Dashyan
  • R Masi
  • R Vita
  • E Sanctis
  • PV Degtyarenko
  • A Deur
  • S Dhamija
  • R Dickson
  • C Djalali
  • GE Dodge
  • D Doughty
  • M Dugger
  • OP Dzyubak
  • H Egiyan
  • L Fassi
  • L Elouadrhiri
  • P Eugenio
  • G Fedotov
  • R Feuerbach
  • R Fersch
  • TA Forest
  • A Fradi
  • M Garcon
  • G Gavaliann
  • N Gevorgyan
  • GP Gilfoyle
  • KL Giovanetti
  • FX Girod
  • JT Goetz
  • W Gohn
  • RW Gothe
  • L Graham
  • KA Griffioen
  • M Guidal
  • N Guler
  • L Guo
  • V Gyurjyan
  • K Hafidi
  • H Hakobyan
  • C Hanretty
  • N Hassall
  • K Hicks
  • I Hleiqawi
  • M Holtrop
  • CE Hyde-Wright
  • Y Ilieva
  • DG Ireland
  • BS Ishkhanov
  • EL Isupov
  • MM Ito
  • D Jenkins
  • HS Jo
  • JR Johnstone
  • K Joo
  • HG Juengst
  • N Kalantarians
  • D Keller
  • JD Kellie
  • M Khandaker
  • W Kim
  • A Klein
  • FJ Klein
  • M Kossov
  • Z Krahn
  • V Kubarovsky
  • J Kuhn
  • SE Kuhn
  • SV Kuleshov
  • V Kuznetsov
  • J Lachniet
  • JM Laget
  • J Langheinrich
  • D Lawrence
  • K Livingston
  • HY Lu
  • M MacCormick
  • N Markov
  • P Mattione
  • B McKinnon
  • JWC McNabb
  • BA Mecking
  • MD Mestayer
  • CA Meyer
  • T Mibe
  • K Mikhailov
  • M Mirazita
  • V Mokeev
  • B Moreno
  • K Moriya
  • SA Morrow
  • M Moteabbed
  • E Munevar
  • GS Mutchler
  • P Nadel-Turonski
  • R Nasseripour
  • S Niccolai
  • G Niculescu
  • I Niculescu
  • BB Niczyporuk
  • MR Niroula
  • RA Niyazov
  • M Nozar
  • M Osipenko
  • AI Ostrovidov
  • K Park
  • S Park
  • E Pasyuk
  • C Paterson
  • SA Pereira
  • J Pierce
  • N Pivnyuk
  • O Pogorelko
  • S Pozdniakov
  • JW Price
  • Y Prok
  • D Protopopescu
  • BA Raue
  • G Ricco
  • M Ripani
  • BG Ritchie
  • G Rosner
  • P Rossi
  • F Sabatie
  • MS Saini
  • J Salamanca
  • C Salgado
  • JP Santoro
  • V Sapunenko
  • D Schott
  • RA Schumacher
  • VS Serov
  • YG Sharabian
  • D Sharov
  • NV Shvedunov
  • ES Smith
  • DI Sober
  • D Sokhan
  • A Stavinsky
  • SS Stepanyan
  • S Stepanyan
  • BE Stokes
  • P Stoler
  • II Strakovsky
  • S Strauch
  • M Taiuti
  • DJ Tedeschi
  • A Tkabladze
  • S Tkachenko
  • L Todor
  • M Ungaro
  • MF Vineyard
  • AV Vlassov
  • DP Watts
  • LB Weinstein
  • DP Weygand
  • M Williams, University of Massachusetts - Amherst
  • E Wolin
  • MH Wood
  • A Yegneswaran
  • M Yurov
  • L Zana
  • J Zhang
  • B Zhao
  • ZW Zhao
Abstract
The exclusive channel p⃗(e⃗,e'p)π0 was studied in the first and second nucleon resonance regions in the Q2 range from 0.187 to 0.770 GeV2 at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the π0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A1/2 and S1/2 for the Roper resonance N(1400)P11 and the N(1535)S11 and N(1520)D13 states.
Disciplines
Publication Date
January 1, 2008
Publisher Statement
Doi:10.1103/PhysRevC.78.045204 Copyright 2008 by The American Physical Society. http://prc.aps.org/pdf/PRC/v78/i4/e045204
Citation Information
AS Biselli, VD Burkert, MJ Amaryan, G Asryan, et al.. "First measurement of target and double spin asymmetries for ep -> ep pi(0) in the nucleon resonance region above the Delta(1232)" Physical Review C Vol. 78 Iss. 4 (2008)
Available at: http://works.bepress.com/michael_williams/67/