Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 > 1GeV~2. I. ep → eπ~+n

P. E. Bosted; M. J. Amaryan; Anefalos Pereira; H. Avakian; R. A. Badui; J. Ball; N. A. Baltzell; M. Battaglieri; V. Batourine; I. Bedlinskiy; A. S. Biselli; W. J. Briscoe; S. Bültmann; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; G. Ciullo; L. Clark; L. Colaneri; P. L. Cole; M. Contalbrigo; V. Crede; A. DAngelo

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Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 > 1GeV~2. I. ep → eπ~+n

机译：Q〜2> 1GeV〜2的独占孔电切割中的靶和光束靶旋转不对称。 I. EP→Eπ〜+ n

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Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive π~+ electroproduction reaction γ*p → nπ~+. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic range covered is 1.1 < W < 3 GeV and 1 < Q~2 < 6 GeV~2. Results were obtained for about 6000 bins in W, Q~2, cos(θ*), and Φ*. Except at forward angles, very large target-spin asymmetries are observed over the entire W region. Reasonable agreement is found with phenomenological fits to previous data for W <1.6 GeV, but very large differences are seen at higher values of W. A generalized parton distributions (GPD)-based model is in poor agreement with the data.When combined with cross-sectional measurements, the present results provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q~2, for resonances with masses as high as 2.4 GeV.

机译：测量光束靶双自旋不对称和目标单旋转不对称，用于独占π〜+电切割反应γ* p→nπ〜+。在Jefferson实验室使用CEBAF大型接受光谱仪，从6-GEV纵向极化电子散射的散射从6-GEV纵向极化电子。覆盖的运动范围是1.1

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来源
《Physical review, C》 |2017年第3期|共12页
作者
P. E. Bosted; M. J. Amaryan; Anefalos Pereira; H. Avakian; R. A. Badui; J. Ball; N. A. Baltzell; M. Battaglieri; V. Batourine; I. Bedlinskiy; A. S. Biselli; W. J. Briscoe; S. Bültmann; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; G. Ciullo; L. Clark; L. Colaneri; P. L. Cole; M. Contalbrigo; V. Crede; A. DAngelo;
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作者单位

College of William and Mary Williamsburg Virginia 23187-8795 USA;

Old Dominion University Norfolk Virginia 23529 USA;

INFN Laboratori Nazionali di Frascati 00044 Frascati Italy;

Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA;

Florida International University Miami Florida 33199 USA;

CEA Centre de Saclay Irfu/Service de Physique Nucléaire 91191 Gif-sur-Yvette France;

Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA;

INFN Sezione di Genova 16146 Genova Italy;

Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA;

Institute of Theoretical and Experimental Physics Moscow 117259 Russia;

Fairfield University Fairfield Connecticut 06824 USA;

George Washington University Washington DC 20052 USA;

Old Dominion University Norfolk Virginia 23529 USA;

Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA;

Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 USA;

INFN Sezione di Genova 16146 Genova Italy;

Ohio University Athens Ohio 45701 USA;

Institut de Physique Nucléaire CNRS/IN2P3 and Université Paris Sud Orsay France;

INFN Sezione di Ferrara 44100 Ferrara Italy;

University of Glasgow Glasgow G12 8QQ United Kingdom;

INFN Sezione di Roma Tor Vergata 00133 Rome Italy;

Idaho State University Pocatello Idaho 83209 USA;

INFN Sezione di Ferrara 44100 Ferrara Italy;

Florida State University Tallahassee Florida 32306 USA;

Universita' di Roma Tor Vergata 00133 Rome Italy;

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原文格式 PDF
正文语种 eng
中图分类原子核物理学、高能物理学;
关键词
Target; beam-target spin; asymmetries;

机译：目标;光束靶旋转;不对称;

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1. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 ＞ 1GeV~2. I. ep → eπ+n [J] . P. E. Bosted, M. J. Amaryan, S. Anefalos Pereira, Physical Review C . 2017,第期

机译：Q〜2> 1GeV〜2的独占孔电切割中的靶和光束靶旋转不对称。 I. EP→Eπ+ n
2. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 ＞ 1 GeV~2. Ⅱ. Ep → eπ~0 p [J] . P. E. Bosted, A. Kim, K. P. Adhikari, Physical Review C . 2017,第期

机译：Q〜2> 1 GEV〜2的独占孔电切割中的目标和光束靶旋转不对称。 Ⅱ。 ep→eπ〜0 p
3. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 > 1 GeV~2. II. ep → eπ~0 p [J] . P. E. Bosted, A. Kim, K. P. Adhikari, Physical review, C . 2017,第3期

机译：Q〜2> 1 GEV〜2的独占孔电切割中的靶和光束靶旋转不对称。 II。 ep→eπ〜0 p
4. Single spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons [C] . Ralf-Christian Seidl Lake Louise Winter Institute . 2003

机译：半包层电电切割的单旋转方位角不对称
5. Measurement of single-target spin asymmetries in the electroproduction of negative pions in the semi-inclusive deep inelastic reaction n dagger (e,e'pi minus) X on a transversely polarized Helium-3 target. [D] . Dutta, Chiranjib. 2010

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6. Experimental studies on the comparative infectivity and pathogenicity of Streptococcus suis type 2. I. Porcine and human isolates in pigs. [O] . I. D. Robertson, D. K. Blackmore 1990

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7. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1 GeV2. I. ep→eπ+n [O] . Bosted, Pe, Amaryan, Mj, Anefalos Pereira, S, 2017

机译：Q2> 1 GeV2的独家介子电生产中的靶标和束靶自旋不对称。 I.ep→eπ+ n

Target and beam-target spin asymmetries in exclusive pion electroproduction for Q~2 > 1GeV~2. I. ep → eπ~+n

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