Measurement of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target

The HERMES Collaboration: A. Airapetian , N. Akopov , Z. Akopov , E.C. Aschenauer , W. Augustyniak , R. Avakian , A. Avetissian , E. Avetisyan

show 122 more authors

S. Belostotski N. Bianchi H.P. Blok A. Borissov J. Bowles I. Brodski V. Bryzgalov J. Burns M. Capiluppi G.P. Capitani E. Cisbani G. Ciullo M. Contalbrigo P.F. Dalpiaz W. Deconinck R. De Leo L. De Nardo E. De Sanctis P. Di Nezza M. Dueren M. Ehrenfried G. Elbakian F. Ellinghaus R. Fabbri A. Fantoni L. Felawka S. Frullani D. Gabbert G. Gapienko V. Gapienko F. Garibaldi G. Gavrilov V. Gharibyan F. Giordano S. Gliske M. Golembiovskaya M. Hartig D. Hasch 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 P. Lenisa A. Lopez Ruiz W. Lorenzon X.-G. Lu X.-R. Lu B.-Q. Ma D. Mahon N.C.R. Makins S.I. Manaenkov L. Manfre Y. Mao B. Marianski A. Martinez de la Ossa H. Marukyan C.A. Miller Y. Miyachi A. Movsisyan M. Murray A. Mussgiller E. Nappi Y. Naryshkin A. Nass M. Negodaev W.-D. Nowak L.L. Pappalardo R. Perez-Benito M. Raithel P.E. Reimer A.R. Reolon C. Riedl K. Rith G. Rosner A. Rostomyan J. Rubin D. Ryckbosch Y. Salomatin A. Schaefer G. Schnell K.P. Schueler B. Seitz T.-A. Shibata V. Shutov M. Stancari M. Statera E. Steffens J.J.M. Steijger F. Stinzing S. Taroian A. Terkulov R. Truty A. Trzcinski M. Tytgat Y. Van Haarlem C. Van Hulse D. Veretennikov V. Vikhrov I. Vilardi S. Wang S. Yaschenko Z. Ye S. Yen V. Zagrebelnyy D. Zeiler B. Zihlmann P. Zupranski

Authors on Pith no claims yet

classification ✦ hep-ex

keywords asymmetriestargetbeamcomptondouble-spindeeplyhelicityhydrogen

0 comments

read the original abstract

Double-spin asymmetries in exclusive electroproduction of real photons from a transversely polarized hydrogen target are measured with respect to the product of target polarization with beam helicity and beam charge, and with respect to the product of target polarization with beam helicity alone. The asymmetries arise from the deeply virtual Compton scattering process and its interference with the Bethe--Heitler process. They are related to the real part of the same combination of Compton form factors as that determining the previously published transverse target single-spin asymmetries through the imaginary part. The results for the double-spin asymmetries are found to be compatible with zero within the uncertainties of the measurement, and are not incompatible with the predictions of the only available GPD-based calculation.

This paper has not been read by Pith yet.

Measurement of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target

discussion (0)