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MEASUREMENTS OF THE PROTON AND DEUTERON SPIN STRUCTURE-FUNCTION G(2) AND ASYMMETRY A(2)

Authors

ABE K AKAGI T ANTHONY PL ANTONOV R ARNOLD RG AVERETT T BAND HR BAUER JM BOREL H BOSTED PE BRETON V BUTTONSHAFER J CHEN JP CHUPP TE CLENDENIN J COMPTOUR C COULTER KP COURT G CRABB D DAOUDI M DAY D DIETRICH FS DUNNE J DUTZ H ERBACHER R FELLBAUM J FELTHAM A FONVIEILLE H FRLEZ E GARVEY D GEARHART R GOMEZ J GRENIER P GRIFFIOEN KA HOIBRATEN S HUGHES EW HYDEWRIGHT C JOHNSON JR KAWALL D KLEIN A KUHN SE KURIKI M LINDGREN R LIU TJ LOMBARDNELSEN RM MARRONCLE J MARUYAMA T MARUYAMA XK MCCARTHY J MEYER W MEZIANI ZE MINEHART R MITCHELL J MORGENSTERN J PETRATOS GG PITTHAN R POCANIC D PRESCOTT C PREPOST R RAINES P RAUE B REYNA D RIJLLART A ROBLIN Y ROCHESTER LS ROCK SE RONDON OA SICK I SMITH LC SMITH TB SPENGOS M STALEY F STEINER P STLORANT S STUART LM SUEKANE F SZALATA ZM TANG H TERRIEN Y USHER T WALZ D WHITE JL WITTE K YOUNG CC YOUNGMAN B YUTA H ZAPALAC G ZIHLMANN B ZIMMERMANN D

Citation

K. Abe et al., MEASUREMENTS OF THE PROTON AND DEUTERON SPIN STRUCTURE-FUNCTION G(2) AND ASYMMETRY A(2), Physical review letters, 76(4), 1996, pp. 587-591

Citations number

Categorie Soggetti

Physics

Journal title

Physical review letters → ACNP

ISSN journal

00319007

Volume

Issue

Year of publication

1996

Pages

587 - 591

Database

ISI

SICI code

0031-9007(1996)76:4<587:MOTPAD>2.0.ZU;2-Q

Abstract

We have measured proton and deuteron virtual photon-nucleon asymmetrie s A(2)(p) and A(2)(d) and structure functions g(2)(p) and g(2)(d) over the range 0.03 < x < 0.8 and 1.3 < Q(2) < 10 (GeV/c)(2) by inelastica lly scattering polarized electrons off polarized ammonia targets. Resu lts for A(2) are significantly smaller than the positivity limit root R for both targets. Within experimental precision the g(2) data are we ll described by the Twist-2 contribution, g(2)(WW). Twist-3 matrix ele ments have been extracted and are compared to theoretical predictions.