Evidence for a single-spin azimuthal asymmetry in semi-inclusive pion electroproduction

被引：368
作者：
Airapetian, A [1 ]
Akopov, N
Amarian, M
Aschenauer, EC
Avakian, H
Avakian, R
Avetissian, A
Avetissian, E
Bains, B
Baumgarten, C
Beckmann, M
Belostotski, S
Belz, JE
Benisch, T
Bernreuther, S
Bianchi, N
Blouw, J
Böttcher, H
Borissov, A
Bouwhuis, M
Brack, J
Brauksiepe, S
Braun, B
Bray, B
Brons, S
Brückner, W
Brüll, A
Bruins, EEW
Bulten, HJ
Capitani, GP
Carter, P
Chumney, P
Cisbani, E
Court, GR
Dalpiaz, PF
De Sanctis, E
De Schepper, D
Devitsin, E
Huberts, PKAD
Di Nezza, P
Düren, M
Dvoredsky, A
Elbakian, G
Ely, J
Fantoni, A
Fechtchenko, A
Ferstl, M
Fiedler, K
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] CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA
[5] Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA
[6] DESY, D-22603 Hamburg, Germany
[7] DESY, D-15738 Zeuthen, Germany
[8] Joint Inst Nucl Res, Dubna 141980, Russia
[9] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany
[10] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
[11] Univ Ferrara, Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy
[12] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[13] Florida Int Univ, Dept Phys, Miami, FL 33199 USA
[14] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany
[15] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium
[16] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany
[17] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[18] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA
[19] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England
[20] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[21] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA
[22] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA
[23] PN Lebedev Phys Inst, Moscow 117924, Russia
[24] Univ Munich, Sekt Phys, D-85748 Garching, Germany
[25] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA
[26] NIKHEF H, NL-1009 DB Amsterdam, Netherlands
[27] Petersburg Nucl Phys Inst, Gatchina 188350, Russia
[28] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
[29] Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy
[30] Ist Super Sanita, Phys Lab, I-00161 Rome, Italy
[31] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
[32] TRIUMF, Vancouver, BC V6T 2A3, Canada
[33] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan
[34] Free Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 18期
关键词：
D O I：
10.1103/PhysRevLett.84.4047
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured for the first time. A significant target-spin asymmetry of the distribution in the azimuthal angle phi of the pion relative to the lepton scattering plane was formed for pi(+) electroproduction on a longitudinally polarized hydrogen target. The corresponding analyzing power in the sin phi moment of the cross section is 0.022 +/- 0.005 +/- 0.003. This result can be interpreted as the effect of terms in the cross section involving chiral-odd spin distribution functions in combination with a chiral-odd fragmentation function that is sensitive to the transverse polarization of the fragmenting quark.
引用
收藏
页码：4047 / 4051
页数：5
相关论文
共 29 条
  • [1] The HERMES spectrometer
    Ackerstaff, K
    Airapetian, A
    Akopov, N
    Amarian, M
    Andreev, V
    Aschenauer, EC
    Avakian, R
    Avakian, H
    Avetissian, A
    Bains, B
    Barrow, S
    Beckhusen, W
    Beckmann, M
    Belostotski, S
    Belz, E
    Benisch, T
    Bernreuther, S
    Bianchi, N
    Blouw, J
    Bottcher, H
    Borissov, A
    Brack, J
    Braun, B
    Bray, B
    Brons, S
    Bruckner, W
    Brull, A
    Bulten, HJ
    Capitani, GP
    Carter, P
    Chumney, P
    Cisbani, E
    Clark, S
    Colilli, S
    Coombes, H
    Court, GR
    Delheij, P
    Devitsin, E
    de Jager, CW
    De Sanctis, E
    De Schepper, D
    Huberts, PKAD
    Di Nezza, P
    Doets, M
    Duren, M
    Dvoredsky, A
    Elbakian, G
    Emerson, J
    Fantoni, A
    Fechtchenko, A
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 417 (2-3) : 230 - 265
  • [2] ANALYZING POWER IN INCLUSIVE PI+ AND PI- PRODUCTION AT HIGH CHI-F WITH A 200 GEV POLARIZED PROTON-BEAM
    Adams, DL
    Akchurin, N
    Belikov, NI
    Bonner, BE
    Buchanan, JA
    Bystricky, J
    Clement, JM
    Corcoran, MD
    Cossairt, JD
    Cranshaw, J
    Derevschikov, AA
    En'yo, H
    Funahashi, H
    Goto, Y
    Grachov, OA
    Grosnick, DP
    Hill, DA
    Imai, K
    Itow, Y
    Iwatani, K
    Krueger, KW
    Kuroda, K
    Langland, J
    Lehar, F
    de Lesquen, A
    Lopiano, D
    Luehring, FC
    Maki, T
    Makino, S
    Masaike, A
    Matulenko, YA
    Meschanin, AP
    Michalowicz, A
    Miller, DH
    Miyake, K
    Nagamine, T
    Nessi-Tedaldi, F
    Nessi, M
    Nguyen, C
    Nurushev, SB
    Ohashi, Y
    Onel, Y
    Patalakha, DI
    Pauletta, G
    Penzo, A
    Phillips, GC
    Read, AL
    Roberts, JB
    van Rossum, L
    Rykov, VL
    [J]. PHYSICS LETTERS B, 1991, 264 (3-4) : 462 - 466
  • [3] AKUSHEVICH I, HEPPH9903325
  • [4] SINGLE SPIN ASYMMETRY FOR P-UP-ARROW-P-]PI-X IN PERTURBATIVE QCD
    ANSELMINO, M
    BOGLIONE, M
    MURGIA, F
    [J]. PHYSICS LETTERS B, 1995, 362 (1-4) : 164 - 172
  • [5] ANSELMINO M, HEPPH9810228
  • [6] Single spin asymmetry in inclusive pion production, Collins effect and the string model
    Artru, X
    Czyzewski, H
    Yabuki, H
    [J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 73 (03): : 527 - 534
  • [7] THE FIRST ACHIEVEMENT OF LONGITUDINAL SPIN POLARIZATION IN A HIGH-ENERGY ELECTRON STORAGE-RING
    BARBER, DP
    BOGE, M
    BREMER, HD
    BRINKMANN, R
    BRUCKNER, W
    DUREN, M
    GIANFELICEWENDT, E
    GROSSHAUSER, C
    KAISER, H
    KLANNER, R
    LOMPERSKI, M
    MEYER, G
    MEYNERS, N
    OELWEIN, P
    RIPKEN, G
    RITH, K
    SCHMIDT, G
    STEFFENS, E
    WANDER, W
    WUMPELMANN, W
    ZAPFE, K
    ZETSCHE, F
    [J]. PHYSICS LETTERS B, 1995, 343 (1-4) : 436 - 443
  • [8] ANALYZING POWER OF INCLUSIVE PRODUCTION OF PI-(+), PI-(-), AND KOS BY POLARIZED PROTONS AT 13.3 AND 18.5 GEV/C
    BONNER, BE
    BUCHANAN, JA
    CLEMENT, JM
    CORCORAN, MD
    KRISHNA, NM
    KRUK, JW
    MIETTINEN, HE
    MOSS, RM
    MUTCHLER, GS
    NESSITEDALDI, F
    NESSI, M
    PHILLIPS, GC
    ROBERTS, JB
    STEVENSON, PM
    TONSE, SR
    BIRMAN, A
    CHUNG, SU
    ETKIN, A
    FERNOW, RC
    KIRK, H
    PROTOPOPESCU, SD
    WILLUTZKI, H
    HALLMAN, T
    MADANSKY, L
    BARYAM, Z
    DOWD, J
    KERN, W
    KING, E
    MAYES, BW
    PINSKY, LS
    [J]. PHYSICAL REVIEW D, 1990, 41 (01): : 13 - 16
  • [9] Study of the pion distribution amplitude in polarized muon pair production
    Brandenburg, A
    Muller, D
    Teryaev, OV
    [J]. PHYSICAL REVIEW D, 1996, 53 (11) : 6180 - 6185
  • [10] Measurement of tensor analyzing powers for elastic electron scattering from a polarized H-2 target internal to a storage ring
    FerroLuzzi, M
    Bouwhuis, M
    Passchier, E
    Zhou, ZL
    Alarcon, R
    Anghinolfi, M
    vanBommel, R
    Botto, T
    vandenBrand, JFJ
    Buchholz, M
    Bulten, HJ
    Choi, S
    Comfort, J
    Dolfini, S
    Ent, R
    Gaulard, C
    Higinbotham, D
    deJager, CW
    vanKlaveren, EP
    Konstantinov, E
    Lang, J
    deLange, DJ
    Miller, MA
    Nikolenko, D
    Nooren, GJ
    Papadakis, N
    Passchier, I
    Poolman, HR
    Popov, SG
    Rachek, I
    Ripani, M
    Six, E
    Steijger, JJM
    Taiuti, M
    Unal, O
    Vodanis, N
    deVries, H
    [J]. PHYSICAL REVIEW LETTERS, 1996, 77 (13) : 2630 - 2633
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