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Article: First measurement of the double spin asymmetry in (-->)e(-->)p-->e(prime)pi(+)n in the resonance region.

De Vita, R / Anghinolfi, M / Burkert, V D / Dodge, G E / Minehart, R / Taiuti, M / Weller, H / Adams, G / Amaryan, M J / Anciant, E / Armstrong, D S / Asavapibhop, B / Asryan, G / Audit, G / Auger, T / Avakian, H / Bagdasaryan, H / Ball, J P / Barrow, S /
Battaglieri, M / Beard, K / Bektasoglu, M / Bianchi, N / Biselli, A S / Boiarinov, S / Bonner, B E / Bosted, P / Bouchigny, S / Branford, D / Brooks, W K / Bueltmann, S / Calarco, J R / Capitani, G P / Carman, D S / Carnahan, B / Cazes, A / Ciciani, L / Cole, P L / Coleman, A / Connelly, J / Cords, D / Corvisiero, P / Crabb, D / Crannell, H / Cummings, J P / De Sanctis, E / Degtyarenko, P V / Demirchyan, R / Denizli, H / Dennis, L / Dharmawardane, K V / Dhuga, K S / Djalali, C / Doughty, D / Dragovitsch, P / Dugger, M / Dytman, S / Eckhause, M / Egiyan, H / Egiyan, K S / Elouadrhiri, L / Empl, A / Farhi, L / Fatemi, R / Feuerbach, R J / Ficenec, J / Forest, T A / Frolov, V / Funsten, H / Gaff, S J / Gai, M / Garçon, M / Gavalian, G / Gilad, S / Gilfoyle, G P / Giovanetti, K L / Girard, P / Golovatch, E / Griffioen, K / Guidal, M / Guillo, M / Gyurjyan, V / Hadjidakis, C / Hancock, D / Hardie, J / Heddle, D / Heimberg, P / Hersman, F W / Hicks, K / Hicks, R S / Holtrop, M / Hu, J / Hyde-Wright, C E / Ishkanov, B S / Ito, M M / Jenkins, D / Joo, K / Kelley, J H / Kellie, J D / Khandaker, M / Kim, K Y / Kim, K / Kim, W / Klein, A / Klein, F J / Klusman, M / Kossov, M / Kramer, L H / Kuang, Y / Kuhn, S E / Lachniet, J / Laget, J M / Lawrence, D / Li, Ji / Livingston, K / Longhi, A / Loukachine, K / Lucas, M / Major, W / Manak, J J / Marchand, C / McAleer, S / McCarthy, J / McNabb, J W C / Mecking, B A / Mestayer, M D / Meyer, C A / Mikhailov, K / Mirazita, M / Miskimen, R / Mokeev, V / Muccifora, V / Mueller, J / Mutchler, G S / Napolitano, J / Nelson, S O / Niculescu, G / Niculescu, I / Niczyporuk, B B / Niyazov, R A / Opper, A K / O'Rielly, G V / Osipenko, M / Park, K / Pasyuk, E / Peterson, G / Philips, S A / Pivnyuk, N / Pocanic, D / Pogorelko, O / Polli, E / Pozdniakov, S / Preedom, B M / Price, J W / Prok, Y / Protopopescu, D / Qin, L M / Raue, B A / Reolon, A R / Riccardi, G / Ricco, G / Ripani, M / Ritchie, B G / Rock, S / Ronchetti, F / Rossi, P / Rowntree, D / Rubin, P D / Sabatié, F / Sabourov, K / Salgado, C / Sapunenko, V / Sargsyan, M / Schumacher, R A / Serov, V S / Shafi, A / Sharabian, Y G / Shaw, J / Skabelin, A V / Smith, E S / Smith, T / Smith, L C / Sober, D I / Sorrell, L / Spraker, M / Stavinsky, A / Stepanyan, S / Stoler, P / Strakovsky, I I / Taylor, S / Tedeschi, D J / Thompson, R / Todor, L / Ungaro, M / Vineyard, M F / Vlassov, A V / Wang, K / Weinstein, L B / Weisberg, A / Weygand, D P / Whisnant, C S / Wolin, E / Yegneswaran, A / Yun, J / Zhang, B / Zhao, J / Zhou, Z

Physical review letters

2002  Volume 88, Issue 8, Page(s) 82001

Abstract: The double spin asymmetry in the (-->)e(-->)p --> e(prime)pi(+)n reaction has been measured for the first time in the resonance region for four-momentum transfer Q2 = 0.35-1.5 GeV(2). Data were taken at Jefferson Lab with the CLAS detector using a 2.6 ... ...

Abstract The double spin asymmetry in the (-->)e(-->)p --> e(prime)pi(+)n reaction has been measured for the first time in the resonance region for four-momentum transfer Q2 = 0.35-1.5 GeV(2). Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid NH3 target. Comparison with predictions of phenomenological models shows strong sensitivity to resonance contributions. Helicity-1/2 transitions are found to be dominant in the second and third resonance regions. The measured asymmetry is consistent with a faster rise with Q(2) of the helicity asymmetry A1 for the F(15)(1680) resonance than expected from the analysis of the unpolarized data.
Language English
Publishing date 2002-02-25
Publishing country United States
Document type Journal Article
ZDB-ID 208853-8
ISSN 1079-7114 ; 0031-9007
ISSN (online) 1079-7114
ISSN 0031-9007
DOI 10.1103/PhysRevLett.88.082001
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