Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction
Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction
Exclusive rho^0-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV^2 < Q^2 < 7.0 GeV^2, 3.0 GeV < W < 6.3 GeV, and -t' < 0.4 GeV^2. Real and imaginary parts of the ratios of the natural-parity-exchange helicity amplitudes T_{11} (\gamma^*_T --> \rho_T), T_{01} (\gamma^*_T --> \rho_L), T_{10} (\gamma^*_L --> \rho_T), and T_{1-1} (\gamma^*_{-T} -->\rho_T) to T_{00} (\gamma^*_L --> \rho_L) are extracted from the data. For the unnatural-parity-exchange amplitude U_{11}, the ratio |U_{11}/T_{00}| is obtained. The Q^2 and t' dependences of these ratios are presented and compared with perturbative QCD predictions.
M. Dueren、P. F. Dalpiaz、I. Hristova、B. -Q. Ma、L. De Nardo、Y. Holler、Y. Naryshkin、S. Gliske、S. Frullani、H. S. Jo、K. P. Schueler、G. Gavrilov、W. -D. Nowak、The HERMES Collaboration、R. Avakian、A. Avetissian、C. Van Hulse、F. Sanftl、S. Yen、P. E. Reimer、L. Lapikas、A. Terkulov、T. Keri、E. Cisbani、V. Gharibyan、L. A. Linden-Levy、R. Perez-Benito、C. Riedl、A. Ivanilov、A. R. Reolon、P. Kravchenko、L. Felawka、S. Belostotski、V. Gapienko、W. Yu、G. Hill、Y. Salomatin、R. De Leo、D. Ryckbosch、K. Rith、D. Veretennikov、F. Garibaldi、H. Marukyan、G. P. Capitani、N. Pickert、A. Hillenbrand、A. Airapetian、A. Mussgiller、J. Rubin、A. Lopez Ruiz、G. Schnell、M. Stancari、V. Bryzgalov、W. Augustyniak、L. L. Pappalardo、M. Statera、A. Nass、P. Lenisa、A. Vandenbroucke、A. Fantoni、T. -A. Shibata、L. Manfre、G. Gapienko、B. Zihlmann、M. Capiluppi、S. Yaschenko、V. Kozlov、Y. Miyachi、E. Steffens、X. -G. Lu、J. Burns、A. Kisselev、A. Martinez de la Ossa、N. C. R. Makins、Y. Van Haarlem、Y. Imazu、E. C. Aschenauer、S. Wang、I. Vilardi、S. Taroian、V. Korotkov、M. Diefenthaler、P. Di Nezza、N. Akopov、S. Joosten、A. Rostomyan、B. Marianski、C. Hadjidakis、M. Murray、J. J. M. Steijger、W. Deconinck、M. Tytgat、X. -R. Lu、H. P. Blok、V. G. Krivokhijine、G. Rosner、G. Karyan、N. Kobayashi、S. I. Manaenkov、M. Negodaev、M. Hoek、F. Giordano、E. Nappi、A. Schaefer、F. Ellinghaus、H. E. Jackson、D. Hasch、M. Hartig、P. Zupranski、G. Ciullo、F. Stinzing、A. Borissov、D. Mahon、R. Lamb、R. Kaiser、V. Vikhrov、M. Ehrenfried、L. Lagamba、C. A. Miller、M. Contalbrigo、V. Shutov、E. De Sanctis、G. Elbakian、V. Muccifora、E. Avetisyan、E. Kinney、R. Fabbri、D. Gabbert、Y. Mao、J. Bowles、W. Lorenzon、B. Seitz、A. Movsisyan、A. Trzcinski、M. Golembiovskaya、Z. Akopov、N. Bianchi、I. Lehmann
10.1140/epjc/s10052-011-1609-2
物理学
M. Dueren,P. F. Dalpiaz,I. Hristova,B. -Q. Ma,L. De Nardo,Y. Holler,Y. Naryshkin,S. Gliske,S. Frullani,H. S. Jo,K. P. Schueler,G. Gavrilov,W. -D. Nowak,The HERMES Collaboration,R. Avakian,A. Avetissian,C. Van Hulse,F. Sanftl,S. Yen,P. E. Reimer,L. Lapikas,A. Terkulov,T. Keri,E. Cisbani,V. Gharibyan,L. A. Linden-Levy,R. Perez-Benito,C. Riedl,A. Ivanilov,A. R. Reolon,P. Kravchenko,L. Felawka,S. Belostotski,V. Gapienko,W. Yu,G. Hill,Y. Salomatin,R. De Leo,D. Ryckbosch,K. Rith,D. Veretennikov,F. Garibaldi,H. Marukyan,G. P. Capitani,N. Pickert,A. Hillenbrand,A. Airapetian,A. Mussgiller,J. Rubin,A. Lopez Ruiz,G. Schnell,M. Stancari,V. Bryzgalov,W. Augustyniak,L. L. Pappalardo,M. Statera,A. Nass,P. Lenisa,A. Vandenbroucke,A. Fantoni,T. -A. Shibata,L. Manfre,G. Gapienko,B. Zihlmann,M. Capiluppi,S. Yaschenko,V. Kozlov,Y. Miyachi,E. Steffens,X. -G. Lu,J. Burns,A. Kisselev,A. Martinez de la Ossa,N. C. R. Makins,Y. Van Haarlem,Y. Imazu,E. C. Aschenauer,S. Wang,I. Vilardi,S. Taroian,V. Korotkov,M. Diefenthaler,P. Di Nezza,N. Akopov,S. Joosten,A. Rostomyan,B. Marianski,C. Hadjidakis,M. Murray,J. J. M. Steijger,W. Deconinck,M. Tytgat,X. -R. Lu,H. P. Blok,V. G. Krivokhijine,G. Rosner,G. Karyan,N. Kobayashi,S. I. Manaenkov,M. Negodaev,M. Hoek,F. Giordano,E. Nappi,A. Schaefer,F. Ellinghaus,H. E. Jackson,D. Hasch,M. Hartig,P. Zupranski,G. Ciullo,F. Stinzing,A. Borissov,D. Mahon,R. Lamb,R. Kaiser,V. Vikhrov,M. Ehrenfried,L. Lagamba,C. A. Miller,M. Contalbrigo,V. Shutov,E. De Sanctis,G. Elbakian,V. Muccifora,E. Avetisyan,E. Kinney,R. Fabbri,D. Gabbert,Y. Mao,J. Bowles,W. Lorenzon,B. Seitz,A. Movsisyan,A. Trzcinski,M. Golembiovskaya,Z. Akopov,N. Bianchi,I. Lehmann.Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction[EB/OL].(2010-12-16)[2025-05-28].https://arxiv.org/abs/1012.3676.点此复制
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