The spin-dependent structure function g(1)(x) of the proton from polarized deep-inelastic muon scattering

被引：108

作者：

Adeva, B

Arik, E

Arvidson, A

Badelek, B

Bardin, G

Baum, G

Berglund, P

Betev, L

Birsa, R

deBotton, N

Bradamante, F

Bravar, A

Bressan, A

Bultmann, S

Burtin, E

Crabb, D

Cranshaw, J

Cuhadar, T

DallaTorre, S

vanDantzig, R

Derro, B

Deshpande, A

Dhawan, S

Dulya, C

Eichblatt, S

Fasching, D

Feinstein, F

Fernandez, C

Forthmann, S

Frois, B

Gallas, A

Garzon, JA

Gilly, H

Giorgi, M

Goertz, S

Gracia, G

deGroot, N

Haft, K

vonHarrach, D

Hasegawa, T

Hautle, P

Hayashi, N

Heusch, CA

Horikawa, N

Hughes, VW

Igo, G

Ishimoto, S

Iwata, T

Kabuss, EM

Kageya, T

机构：

[1] UNIV BIELEFELD,DEPT PHYS,D-33501 BIELEFELD,GERMANY

[2] BOGAZICI UNIV,ISTANBUL,TURKEY

[3] ISTANBUL TECH UNIV,TR-80626 ISTANBUL,TURKEY

[4] RUHR UNIV BOCHUM,DEPT PHYS,D-44780 BOCHUM,GERMANY

[5] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024

[6] CERN,CH-1211 GENEVA 23,SWITZERLAND

[7] UNIV FREIBURG,DEPT PHYS,D-79104 FREIBURG,GERMANY

[8] GKSS,D-21494 GEESTHACHT,GERMANY

[9] HELSINKI UNIV TECHNOL,LOW TEMP LAB,FIN-02150 ESPOO,FINLAND

[10] INST PARTICLE PHYS TECHNOL,FIN-02150 ESPOO,FINLAND

[11] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204

[12] JINR,RU-141980 DUBNA,RUSSIA

[13] UNIV MAINZ,INST NUCL PHYS,D-55099 MAINZ,GERMANY

[14] UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM

[15] UNIV MUNICH,DEPT PHYS,D-80799 MUNICH,GERMANY

[16] NAGOYA UNIV,CIRSE,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN

[17] DEPT PHYS,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN

[18] DELFT UNIV TECHNOL,NIKHEF H,FOM,NL-1009 AJ AMSTERDAM,NETHERLANDS

[19] FREE UNIV AMSTERDAM,NL-1009 AJ AMSTERDAM,NETHERLANDS

[20] NORTHWESTERN UNIV,DEPT PHYS,EVANSTON,IL 60208

[21] CEA SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE

[22] TEL AVIV UNIV,SCH PHYS,IL-69978 TEL AVIV,ISRAEL

[23] UNIV TRIESTE,DEPT PHYS,I-34127 TRIESTE,ITALY

[24] IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY

[25] UPPSALA UNIV,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN

[26] UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901

[27] SOLTAN INST NUCL STUDIES,PL-00681 WARSAW,POLAND

[28] WARSAW UNIV,PL-00681 WARSAW,POLAND

[29] YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511

[30] MIYAZAKI UNIV,FAC ENGN,MIYAZAKI 88921,JAPAN

[31] PAUL SCHERRER INST,CH-5232 VILLIGEN,SWITZERLAND

[32] RIKEN,INST PHYS & CHEM RES,WAKO,SAITAMA 35101,JAPAN

[33] UNIV CALIF SANTA CRUZ,INST PARTICLE PHYS,SANTA CRUZ,CA 95064

[34] KEK,TSUKUBA,IBARAKI 305,JAPAN

[35] NORTHEASTERN UNIV,DEPT PHYS,BOSTON,MA 02115

[36] WARSAW UNIV TECHNOL,WARSAW,POLAND

[37] UNIV BUENOS AIRES,DEPT PHYS,RA-1428 BUENOS AIRES,DF,ARGENTINA

来源：

PHYSICS LETTERS B | 1997年 / 412卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(97)01106-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new measurement of the virtual photon proton asymmetry A(1)(P) from deep inelastic scattering of polarized muons on polarized protons in the kinematic range 0.0008 < x < 0.7 and 0.2 < Q(2) < 100 GeV2. With this, the statistical uncertainty of our measurement has improved by a factor of 2 compared to our previous measurements. The spin-dependent structure function g(1)(P) is determined for the data with Q(2) > 1 GeV2. A perturbative QCD evolution in next-to-leading order is used to determine g(1)(P)(x) as a constant Q(2). At Q(2) = 10 GeV2 we find, in the measured range, integral(0.003)(0.7)g(1)(P)(x)dx = 0.139 +/- 0.006(stat) +/- 0.008(syst)+/- 0.006(evol). The value of the first moment Gamma(1)(P) = integral(0)(1)g(1)(P)(x)dx of g(1)(P) depends on the approach used to describe the behaviour of g(1)(P) at low x. We find that the Ellis-Jaffe sum rule is violated. With our published result for Gamma(1)(d) we confirm the Bjorken sum rule with an accuracy of approximate to 15% at the one standard deviation level. (C) 1997 Elsevier Science B.V.

引用

页码：414 / 424

页数：11

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