Abstract
Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions γ→+p→K++→ andγ →+p → K + +Σ → 0. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) detector at the Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85cos θ K+c.m.<+0.95. For the θ, the polarization transfer coefficient along the photon momentum axis, Cz, was found to be near unity for a wide range of energy and kaon production angles. The associated transverse polarization coefficient Cx is smaller than Cz by a roughly constant difference of unity. Most significantly, the total polarization vector, including the induced polarization P, has magnitude consistent with unity at all measured energies and production angles when the beam is fully polarized. For the 0 this simple phenomenology does not hold. All existing hadrodynamic models are in poor agreement with these results.
| Original language | English (US) |
|---|---|
| Article number | 035205 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 75 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 21 2007 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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First measurement of beam-recoil observables Cx and Cz in hyperon photoproduction. / Bradford, R. K.; Schumacher, R. A.; Adams, G.; Amaryan, M. J.; Ambrozewicz, P.; Anciant, E.; Anghinolfi, M.; Asavapibhop, B.; Asryan, G.; Audit, G.; Avakian, H.; Bagdasaryan, H.; Baillie, N.; Ball, J. P.; Baltzell, N. A.; Barrow, S.; Batourine, V.; Battaglieri, M.; Beard, K.; Bedlinskiy, I.; Bektasoglu, M.; Bellis, M.; Benmouna, N.; Berman, B. L.; Bianchi, N.; Biselli, A. S.; Bonner, B. E.; Bouchigny, S.; Boiarinov, S.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Bültmann, S.; Burkert, V. D.; Butuceanu, C.; Calarco, J. R.; Careccia, S. L.; Carman, D. S.; Carnahan, B.; Chen, S.; Cole, P. L.; Coleman, A.; Collins, P.; Coltharp, P.; Cords, D.; Corvisiero, P.; Crabb, D.; Crannell, H.; Crede, V.; Cummings, J. P.; Masi, R. De; De Sanctis, E.; De Vita, R.; Degtyarenko, P. V.; Denizli, H.; Dennis, L.; Deur, A.; Dharmawardane, K. V.; Dickson, R.; Djalali, C.; Dodge, G. E.; Donnelly, J.; Doughty, D.; Dragovitsch, P.; Dugger, Michael; Dytman, S.; Dzyubak, O. P.; Egiyan, H.; Egiyan, K. S.; El Fassi, L.; Elouadrhiri, L.; Empl, A.; Eugenio, P.; Fatemi, R.; Fedotov, G.; Feldman, G.; Feuerbach, R. J.; Forest, T. A.; Funsten, H.; Garçon, M.; Gavalian, G.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gonenc, A.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Guillo, M.; Guler, N.; Guo, L.; Gyurjyan, V.; Hadjidakis, C.; Hafidi, K.; Hakobyan, H.; Hakobyan, R. S.; Hardie, J.; Heddle, D.; Hersman, F. W.; Hicks, K.; Hleiqawi, I.; Holtrop, M.; Hu, J.; Huertas, M.; Hyde-Wright, C. E.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Ito, M. M.; Jenkins, D.; Jo, H. S.; Joo, K.; Juengst, H. G.; Kalantarians, N.; Kellie, J. D.; Khandaker, M.; Kim, K. Y.; Kim, K.; Kim, W.; Klein, A.; Klein, F. J.; Klusman, M.; Kossov, M.; Kramer, L. H.; Kubarovsky, V.; Kuhn, J.; Kuhn, S. E.; Kuleshov, S. V.; Lachniet, J.; Laget, J. M.; Langheinrich, J.; Lawrence, D.; Lima, A. C S; Livingston, K.; Lu, H. Y.; Lukashin, K.; MacCormick, M.; Manak, J. J.; Marchand, C.; Markov, N.; McAleer, S.; McKinnon, B.; McNabb, J. W C; Mecking, B. A.; Mestayer, M. D.; Meyer, C. A.; Mibe, T.; Mikhailov, K.; Mirazita, M.; Miskimen, R.; Mokeev, V.; Moriya, K.; Morrow, S. A.; Moteabbed, M.; Muccifora, V.; Mueller, J.; Mutchler, G. S.; Nadel-Turonski, P.; Napolitano, J.; Nasseripour, R.; Natasha, N.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Niczyporuk, B. B.; Niroula, M. R.; Niyazov, R. A.; Nozar, M.; O'Rielly, G. V.; Osipenko, M.; Ostrovidov, A. I.; Park, K.; Pasyuk, E.; Paterson, C.; Philips, S. A.; Pierce, J.; Pivnyuk, N.; Pocanic, D.; Pogorelko, O.; Polli, E.; Popa, I.; Pozdniakov, S.; Preedom, B. M.; Price, J. W.; Prok, Y.; Protopopescu, D.; Qin, L. M.; Quinn, B. P.; Raue, B. A.; Riccardi, G.; Ricco, G.; Ripani, M.; Ritchie, Barry; Ronchetti, F.; Rosner, G.; Rossi, P.; Rowntree, D.; Rubin, P. D.; Sabatiã, F.; Salamanca, J.; Salgado, C.; Santoro, J. P.; Sapunenko, V.; Serov, V. S.; Shafi, A.; Sharabian, Y. G.; Shaw, J.; Shvedunov, N. V.; Simionatto, S.; Skabelin, A. V.; Smith, E. S.; Smith, L. C.; Sober, D. I.; Sokhan, D.; Spraker, M.; Stavinsky, A.; Stepanyan, S. S.; Stepanyan, S.; Stokes, B. E.; Stoler, P.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Taylor, S.; Tedeschi, D. J.; Thoma, U.; Thompson, R.; Tkabladze, A.; Tkachenko, S.; Todor, L.; Tur, C.; Ungaro, M.; Vineyard, M. F.; Vlassov, A. V.; Wang, K.; Watts, D. P.; Weinstein, L. B.; Weller, H.; Weygand, D. P.; Williams, M.; Wolin, E.; Wood, M. H.; Yegneswaran, A.; Yun, J.; Zana, L.; Zhang, J.; Zhao, B.; Zhao, Z. W.
In: Physical Review C - Nuclear Physics, Vol. 75, No. 3, 035205, 21.03.2007.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - First measurement of beam-recoil observables Cx and Cz in hyperon photoproduction
AU - Bradford, R. K.
AU - Schumacher, R. A.
AU - Adams, G.
AU - Amaryan, M. J.
AU - Ambrozewicz, P.
AU - Anciant, E.
AU - Anghinolfi, M.
AU - Asavapibhop, B.
AU - Asryan, G.
AU - Audit, G.
AU - Avakian, H.
AU - Bagdasaryan, H.
AU - Baillie, N.
AU - Ball, J. P.
AU - Baltzell, N. A.
AU - Barrow, S.
AU - Batourine, V.
AU - Battaglieri, M.
AU - Beard, K.
AU - Bedlinskiy, I.
AU - Bektasoglu, M.
AU - Bellis, M.
AU - Benmouna, N.
AU - Berman, B. L.
AU - Bianchi, N.
AU - Biselli, A. S.
AU - Bonner, B. E.
AU - Bouchigny, S.
AU - Boiarinov, S.
AU - Branford, D.
AU - Briscoe, W. J.
AU - Brooks, W. K.
AU - Bültmann, S.
AU - Burkert, V. D.
AU - Butuceanu, C.
AU - Calarco, J. R.
AU - Careccia, S. L.
AU - Carman, D. S.
AU - Carnahan, B.
AU - Chen, S.
AU - Cole, P. L.
AU - Coleman, A.
AU - Collins, P.
AU - Coltharp, P.
AU - Cords, D.
AU - Corvisiero, P.
AU - Crabb, D.
AU - Crannell, H.
AU - Crede, V.
AU - Cummings, J. P.
AU - Masi, R. De
AU - De Sanctis, E.
AU - De Vita, R.
AU - Degtyarenko, P. V.
AU - Denizli, H.
AU - Dennis, L.
AU - Deur, A.
AU - Dharmawardane, K. V.
AU - Dickson, R.
AU - Djalali, C.
AU - Dodge, G. E.
AU - Donnelly, J.
AU - Doughty, D.
AU - Dragovitsch, P.
AU - Dugger, Michael
AU - Dytman, S.
AU - Dzyubak, O. P.
AU - Egiyan, H.
AU - Egiyan, K. S.
AU - El Fassi, L.
AU - Elouadrhiri, L.
AU - Empl, A.
AU - Eugenio, P.
AU - Fatemi, R.
AU - Fedotov, G.
AU - Feldman, G.
AU - Feuerbach, R. J.
AU - Forest, T. A.
AU - Funsten, H.
AU - Garçon, M.
AU - Gavalian, G.
AU - Gilfoyle, G. P.
AU - Giovanetti, K. L.
AU - Girod, F. X.
AU - Goetz, J. T.
AU - Gonenc, A.
AU - Gothe, R. W.
AU - Griffioen, K. A.
AU - Guidal, M.
AU - Guillo, M.
AU - Guler, N.
AU - Guo, L.
AU - Gyurjyan, V.
AU - Hadjidakis, C.
AU - Hafidi, K.
AU - Hakobyan, H.
AU - Hakobyan, R. S.
AU - Hardie, J.
AU - Heddle, D.
AU - Hersman, F. W.
AU - Hicks, K.
AU - Hleiqawi, I.
AU - Holtrop, M.
AU - Hu, J.
AU - Huertas, M.
AU - Hyde-Wright, C. E.
AU - Ilieva, Y.
AU - Ireland, D. G.
AU - Ishkhanov, B. S.
AU - Isupov, E. L.
AU - Ito, M. M.
AU - Jenkins, D.
AU - Jo, H. S.
AU - Joo, K.
AU - Juengst, H. G.
AU - Kalantarians, N.
AU - Kellie, J. D.
AU - Khandaker, M.
AU - Kim, K. Y.
AU - Kim, K.
AU - Kim, W.
AU - Klein, A.
AU - Klein, F. J.
AU - Klusman, M.
AU - Kossov, M.
AU - Kramer, L. H.
AU - Kubarovsky, V.
AU - Kuhn, J.
AU - Kuhn, S. E.
AU - Kuleshov, S. V.
AU - Lachniet, J.
AU - Laget, J. M.
AU - Langheinrich, J.
AU - Lawrence, D.
AU - Lima, A. C S
AU - Livingston, K.
AU - Lu, H. Y.
AU - Lukashin, K.
AU - MacCormick, M.
AU - Manak, J. J.
AU - Marchand, C.
AU - Markov, N.
AU - McAleer, S.
AU - McKinnon, B.
AU - McNabb, J. W C
AU - Mecking, B. A.
AU - Mestayer, M. D.
AU - Meyer, C. A.
AU - Mibe, T.
AU - Mikhailov, K.
AU - Mirazita, M.
AU - Miskimen, R.
AU - Mokeev, V.
AU - Moriya, K.
AU - Morrow, S. A.
AU - Moteabbed, M.
AU - Muccifora, V.
AU - Mueller, J.
AU - Mutchler, G. S.
AU - Nadel-Turonski, P.
AU - Napolitano, J.
AU - Nasseripour, R.
AU - Natasha, N.
AU - Niccolai, S.
AU - Niculescu, G.
AU - Niculescu, I.
AU - Niczyporuk, B. B.
AU - Niroula, M. R.
AU - Niyazov, R. A.
AU - Nozar, M.
AU - O'Rielly, G. V.
AU - Osipenko, M.
AU - Ostrovidov, A. I.
AU - Park, K.
AU - Pasyuk, E.
AU - Paterson, C.
AU - Philips, S. A.
AU - Pierce, J.
AU - Pivnyuk, N.
AU - Pocanic, D.
AU - Pogorelko, O.
AU - Polli, E.
AU - Popa, I.
AU - Pozdniakov, S.
AU - Preedom, B. M.
AU - Price, J. W.
AU - Prok, Y.
AU - Protopopescu, D.
AU - Qin, L. M.
AU - Quinn, B. P.
AU - Raue, B. A.
AU - Riccardi, G.
AU - Ricco, G.
AU - Ripani, M.
AU - Ritchie, Barry
AU - Ronchetti, F.
AU - Rosner, G.
AU - Rossi, P.
AU - Rowntree, D.
AU - Rubin, P. D.
AU - Sabatiã, F.
AU - Salamanca, J.
AU - Salgado, C.
AU - Santoro, J. P.
AU - Sapunenko, V.
AU - Serov, V. S.
AU - Shafi, A.
AU - Sharabian, Y. G.
AU - Shaw, J.
AU - Shvedunov, N. V.
AU - Simionatto, S.
AU - Skabelin, A. V.
AU - Smith, E. S.
AU - Smith, L. C.
AU - Sober, D. I.
AU - Sokhan, D.
AU - Spraker, M.
AU - Stavinsky, A.
AU - Stepanyan, S. S.
AU - Stepanyan, S.
AU - Stokes, B. E.
AU - Stoler, P.
AU - Strakovsky, I. I.
AU - Strauch, S.
AU - Taiuti, M.
AU - Taylor, S.
AU - Tedeschi, D. J.
AU - Thoma, U.
AU - Thompson, R.
AU - Tkabladze, A.
AU - Tkachenko, S.
AU - Todor, L.
AU - Tur, C.
AU - Ungaro, M.
AU - Vineyard, M. F.
AU - Vlassov, A. V.
AU - Wang, K.
AU - Watts, D. P.
AU - Weinstein, L. B.
AU - Weller, H.
AU - Weygand, D. P.
AU - Williams, M.
AU - Wolin, E.
AU - Wood, M. H.
AU - Yegneswaran, A.
AU - Yun, J.
AU - Zana, L.
AU - Zhang, J.
AU - Zhao, B.
AU - Zhao, Z. W.
PY - 2007/3/21
Y1 - 2007/3/21
N2 - Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions γ→+p→K++→ andγ →+p → K + +Σ → 0. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) detector at the Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85cos θ K+c.m.<+0.95. For the θ, the polarization transfer coefficient along the photon momentum axis, Cz, was found to be near unity for a wide range of energy and kaon production angles. The associated transverse polarization coefficient Cx is smaller than Cz by a roughly constant difference of unity. Most significantly, the total polarization vector, including the induced polarization P, has magnitude consistent with unity at all measured energies and production angles when the beam is fully polarized. For the 0 this simple phenomenology does not hold. All existing hadrodynamic models are in poor agreement with these results.
AB - Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions γ→+p→K++→ andγ →+p → K + +Σ → 0. The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) detector at the Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85cos θ K+c.m.<+0.95. For the θ, the polarization transfer coefficient along the photon momentum axis, Cz, was found to be near unity for a wide range of energy and kaon production angles. The associated transverse polarization coefficient Cx is smaller than Cz by a roughly constant difference of unity. Most significantly, the total polarization vector, including the induced polarization P, has magnitude consistent with unity at all measured energies and production angles when the beam is fully polarized. For the 0 this simple phenomenology does not hold. All existing hadrodynamic models are in poor agreement with these results.
UR - http://www.scopus.com/inward/record.url?scp=33947531209&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947531209&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.75.035205
DO - 10.1103/PhysRevC.75.035205
M3 - Article
AN - SCOPUS:33947531209
VL - 75
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 3
M1 - 035205
ER -