Article
Measurement of the polarized structure function sigma(LT ') for pion electroproduction in the Roper-resonance region
Physical Review C
(2005)
- K Joo
- LC Smith
- IG Aznauryan
- VD Burkert
- H Egiyan
- R Minehart
- G Adams
- P Ambrozewicz
- E Anciant
- M Anghinolfi
- B Asavapibhop
- G Asryan
- G Audit
- T Auger
- H Avakian
- H Bagdasaryan
- N Baillie
- JP Ball
- NA Baltzell
- S Barrow
- V Batourine
- M Battaglieri
- K Beard
- I Bedlinskiy
- M Bektasoglu
- M Bellis
- N Benmouna
- BL Berman
- N Bianchi
- AS Biselli
- BE Bonner
- S Bouchigny
- S Boiarinov
- R Bradford
- D Branford
- WJ Briscoe
- WK Brooks
- S Bueltmann
- C Butuceanu
- JR Calarco
- SL Careccia
- DS Carman
- B Carnahan
- C Cetina
- S Chen
- PL Cole
- A Coleman
- P Coltharp
- D Cords
- P Corvisiero
- D Crabb
- JP Cummings
- E De Sanctis
- R DeVita
- PV Degtyarenko
- L Dennis
- A Deur
- KV Dharmawardane
- KS Dhuga
- C Djalali
- GE Dodge
- J Donnelly
- D Doughty
- P Dragovitsch
- M Dugger
- S Dytman
- OP Dzyubak
- KS Egiyan
- L Elouadrhiri
- A Empl
- P Eugenio
- L Farhi
- R Fatemi
- G Fedotov
- G Feldman
- RJ Feuerbach
- TA Forest
- V Frolov
- H Funsten
- SJ Gaff
- M Garcon
- G Gavalian
- GP Gilfoyle
- KL Giovanetti
- P Girard
- FX Girod
- JT Goetz
- RW Gothe
- KA Griffioen
- M Guidal
- M Guillo
- N Guler
- L Guo
- V Gyurjyan
- RS Hakobyan
- J Hardie
- D Heddle
- FW Hersman
- K Hicks
- I Hleiqawi
- M Holtrop
- J Hu
- CE Hyde-Wright
- Y Ilieva
- DG Ireland
- BS Ishkhanov
- MM Ito
- D Jenkins
- HS Jo
- HG Juengst
- JH Kelley
- JD Kellie
- M Khandaker
- KY Kim
- K Kim
- W Kim
- A Klein
- FJ Klein
- AV Klimenko
- M Klusman
- M Kossov
- LH Kramer
- V Kubarovsky
- J Kuhn
- SE Kuhn
- J Lachniet
- JM Laget
- J Langheinrich
- D Lawrence
- T Lee
- K Livingston
- K Lukashin
- JJ Manak
- C Marchand
- LC Maximon
- S McAleer
- B McKinnon
- JWC McNabb
- BA Mecking
- MD Mestayer
- CA Meyer
- K Mikhailov
- M Mirazita
- R Miskimen
- V Mokeev
- SA Morrow
- V Muccifora
- J Mueller
- GS Mutchler
- P Nadel-Turonski
- J Napolitano
- R Nasseripour
- SO Nelson
- S Niccolai
- G Niculescu
- I Niculescu
- BB Niczyporuk
- RA Niyazov
- M Nozar
- GV O'Rielly
- M Osipenko
- AI Ostrovidov
- K Park
- E Pasyuk
- G Peterson
- SA Philips
- J Pierce
- N Pivnyuk
- D Pocanic
- O Pogorelko
- E Polli
- S Pozdniakov
- BM Preedom
- JW Price
- Y Prok
- D Protopopescu
- LM Qin
- BA Raue
- G Riccardi
- G Ricco
- M Ripani
- BG Ritchie
- F Ronchetti
- G Rosner
- P Rossi
- D Rowntree
- PD Rubin
- F Sabatie
- K Sabourov
- C Salgado
- JP Santoro
- V Sapunenko
- RA Schumacher
- VS Serov
- A Shafi
- YG Sharabian
- J Shaw
- S Simionatto
- AV Skabelin
- ES Smith
- DI Sober
- M Spraker
- A Stavinsky
- SS Stepanyan
- S Stepanyan
- BE Stokes
- P Stoler
- II Strakovsky
- S Strauch
- M Taiuti
- S Taylor
- DJ Tedeschi
- U Thoma
- R Thompson
- A Tkabladze
- C Tur
- M Ungaro
- MF Vineyard
- AV Vlassov
- K Wang
- LB Weinstein
- H Weller
- DP Weygand
- M Williams, University of Massachusetts - Amherst
- E Wolin
- MH Wood
- A Yegneswaran
- J Yun
- L Zana
- J Zhang
Abstract
The polarized longitudinal-transverse structure function σLT' measures the interference between real and imaginary amplitudes in pion electroproduction and can be used to probe the coupling between resonant and nonresonant processes. We report new measurements of σLT' in the N(1440)1/2+ (Roper) resonance region at Q2=0.40 and 0.65GeV2 for both the π0p and π+n channels. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally polarized electrons at a beam energy of 1.515 GeV. Complete angular distributions were obtained and are compared to recent phenomenological models. The σLT'(π+n) channel shows a large sensitivity to the Roper-resonance multipoles M1- and S1- and provides new constraints on models of resonance formation.
Disciplines
Publication Date
January 1, 2005
Publisher Statement
Doi:10.1103/PhysRevC.72.058202
Copyright 2005 by The American Physical Society.
http://prc.aps.org/pdf/PRC/v72/i5/e058202
Citation Information
K Joo, LC Smith, IG Aznauryan, VD Burkert, et al.. "Measurement of the polarized structure function sigma(LT ') for pion electroproduction in the Roper-resonance region" Physical Review C Vol. 72 Iss. 5 (2005) Available at: http://works.bepress.com/michael_williams/110/