A measurement of the virtual-photon asymmetry A(2)(x, Q(2)) and of the spin-structure function g(2)(x, Q(2)) of the proton are presented for the kinematic range 0.004 < x < 0.9 and 0.18 GeV2 < Q(2) < 20 GeV2. The data were collected by the HERMES experiment at the HERA storage ring at DESY while studying inclusive deep-inelastic scattering of 27.6 GeV longitudinally polarized leptons off a transversely polarized hydrogen gas target. The results are consistent with previous experimental data from CERN and SLAC. For the x-range covered, the measured integral of g(2)(x) converges to the null result of the Burkhardt-Cottingham sum rule. The x(2) moment of the twist-3 contribution to g(2)(x) is found to be compatible with zero.

Measurement of the virtual-photon asymmetry A(2) and the spin-structure function g(2) of the proton

CAPILUPPI, Marco;CIULLO, Giuseppe;CONTALBRIGO, Marco;FERRETTI, Paola;LENISA, Paolo;PAPPALARDO, Luciano Libero;STANCARI, Michelle Dawn;STATERA, Marco;
2012

Abstract

A measurement of the virtual-photon asymmetry A(2)(x, Q(2)) and of the spin-structure function g(2)(x, Q(2)) of the proton are presented for the kinematic range 0.004 < x < 0.9 and 0.18 GeV2 < Q(2) < 20 GeV2. The data were collected by the HERMES experiment at the HERA storage ring at DESY while studying inclusive deep-inelastic scattering of 27.6 GeV longitudinally polarized leptons off a transversely polarized hydrogen gas target. The results are consistent with previous experimental data from CERN and SLAC. For the x-range covered, the measured integral of g(2)(x) converges to the null result of the Burkhardt-Cottingham sum rule. The x(2) moment of the twist-3 contribution to g(2)(x) is found to be compatible with zero.
2012
A., Airapetian; N., Akopov; Z., Akopov; E. C., Aschenauer; W., Augustyniak; R., Avakian; A., Avetissian; E., Avetisyan; S., Belostotski; N., Bianchi; H. P., Blok; A., Borissov; J., Bowles; V., Bryzgalov; J., Burns; Capiluppi, Marco; G. P., Capitani; E., Cisbani; Ciullo, Giuseppe; Contalbrigo, Marco; Ferretti, Paola; W., Deconinck; R. D., Leo; L. D., Nardo; E. D., Sanctis; M., Diefenthaler; P. D., Nezza; M., Dueren; M., Ehrenfried; G., Elbakian; F., Ellinghaus; A., Fantoni; L., Felawka; S., Frullani; D., Gabbert; G., Gapienko; V., Gapienko; F., Garibaldi; G., Gavrilov; V., Gharibyan; F., Giordano; S., Gliske; M., Golembiovskaya; C., Hadjidakis; M., Hartig; D., Hasch; A., Hillenbrand; M., Hoek; Y., Holler; I., Hristova; Y., Imazu; A., Ivanilov; H. E., Jackson; H. S., Jo; S., Joosten; R., Kaiser; G., Karyan; T., Keri; E., Kinney; A., Kisselev; V., Korotkov; V., Kozlov; P., Kravchenko; V. G., Krivokhijine; L., Lagamba; L., Lapikas; I., Lehmann; Lenisa, Paolo; A. L., Ruiz; W., Lorenzon; B. . ., Q.; D., Mahon; N. C., R.; S. I., Manaenkov; L., Manfre; Y., Mao; B., Marianski; A. M., De; H., Marukyan; C. A., Miller; Y., Miyachi; A., Movsisyan; V., Muccifora; M., Murray; A., Mussgiller; E., Nappi; Y., Naryshkin; A., Nass; M., Negodaev; W. . ., D.; Pappalardo, Luciano Libero; R., Perez Benito; A., Petrosyan; P. E., Reimer; A. R., Reolon; C., Riedl; K., Rith; G., Rosner; A., Rostomyan; J., Rubin; D., Ryckbosch; Y., Salomatin; F., Sanftl; A., Schaefer; G., Schnell; K. P., Schueler; B., Seitz; T. . ., A.; V., Shutov; Stancari, Michelle Dawn; Statera, Marco; E., Steffens; J. J., M.; J., Stewart; F., Stinzing; S., Taroian; A., Terkulov; R., Truty; A., Trzcinski; M., Tytgat; A., Vandenbroucke; Y. V., Haarlem; C. V., Hulse; D., Veretennikov; V., Vikhrov; I., Vilardi; S., Wang; S., Yaschenko; Z., Ye; S., Yen; V., Zagrebelnyy; D., Zeiler; B., Zihlmann; P., Zupranski
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1678683
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 30
social impact