Evidence for quark-hadron duality in the proton spin asymmetry A1 -: art. no. 092002

被引：77

作者：

Airapetian, A ^{[1
]}

Akopov, N

Akopov, Z

Amarian, M

Ammosov, VV

Aschenauer, EC

Avakian, H

Avakian, R

Avetissian, A

Avetissian, E

Bailey, P

Baturin, V

Baumgarten, C

Beckmann, M

Belostotski, S

Bernreuther, S

Bianchi, N

Blok, HP

Böttcher, H

Borissov, A

Bouhali, O

Bouwhuis, M

Brack, J

Brauksiepe, S

Brüll, A

Brunn, I

Bulten, HJ

Capitani, GP

Cisbani, E

Ciullo, G

Court, GR

Dalpiaz, PF

De Leo, R

De Nardo, L

De Sanctis, E

Devitsin, E

Huberts, PKAD

Di Nezza, P

Düren, M

Ehrenfried, M

Elbakian, G

Ellinghaus, F

Elschenbroich, U

Ely, J

Fabbri, R

Fantoni, A

Fechtchenko, A

Felawka, L

Filippone, BW

Fischer, H

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[4] Ist Nazl Fis Nucl, Sez Bari, I-70124 Bari, Italy

[5] CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA

[6] Univ Colorado, Phys Nucl Lab, Boulder, CO 80309 USA

[7] DESY, D-22603 Hamburg, Germany

[8] DESY Zeuthen, D-15738 Zeuthen, Germany

[9] Joint Inst Nucl Res, Dubna 141980, Russia

[10] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[11] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[12] Ist Nazl Fis Mat, Sez Ferrara, I-44100 Ferrara, Italy

[13] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[14] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[15] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium

[16] Univ Giessen, Inst Phys, D-35392 Giessen, Germany

[17] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[18] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England

[19] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[20] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[21] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA

[22] PN Lebedev Phys Inst, Moscow 117924, Russia

[23] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[24] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

[25] NIKHEF, NL-1009 DB Amsterdam, Netherlands

[26] Petersburg Nucl Phys Inst, Gatchina 188350, Russia

[27] Inst High Energy Phys, Protvino 142284, Moscow Oblast, Russia

[28] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[29] Ist Super Sanita, Ist Nazl Fis Nucl, Sez Roma 1, Grp Sanita & Phys Lab, I-00161 Rome, Italy

[30] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[31] TRIUMF, Vancouver, BC V6T 2A3, Canada

[32] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[33] Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.90.092002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A(1). Longitudinally polarized positrons were scattered off a longitudinally polarized hydrogen target for values of Q(2) between 1.2 and 12 GeV2 and values of W-2 between 1 and 4 GeV2. The average double-spin asymmetry in the nucleon resonance region is found to agree with that measured in deep-inelastic scattering at the same values of the Bjorken scaling variable x. This finding implies that the description of A(1) in terms of quark degrees of freedom is valid also in the nucleon resonance region for values of Q(2) above 1.6 GeV2.

引用

页数：5

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