Abstract
High-statistics cross sections and recoil polarizations for the reactions γ+p → K+ + Λ and γ+p → K+ Σ0 have been measured at CLAS for center-of-mass energies between 1.6 and 2.3 GeV. In the K+λ channel we confirm a resonance-like structure near W= 1.9 GeV at backward kaon angles. Our data show more complex s-and u- channel behavior than previously seen, since structure is also present at forward angles, but not at central angles. The position and width change with angle, indicating that more than one resonance is playing a role. Large positive Λ polarization at backward angles, which is also energy dependent, is consistent with sizable s- or u-channel contributions. Presently available model calculations cannot explain these aspects of the data.
| Original language | English (US) |
|---|---|
| Article number | 042201 |
| Pages (from-to) | 042201-1-042201-5 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 69 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2004 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Hyperon photoproduction in the nucleon resonance region. / McNabb, J. W C; Schumacher, R. A.; Todor, L.; Adams, G.; Anciant, E.; Anghinolfi, M.; Asavapibhop, B.; Audit, G.; Auger, T.; Avakian, H.; Bagdasaryan, H.; Ball, J. P.; Barrow, S.; Battaglieri, M.; Beard, K.; Bektasoglu, M.; Bellis, M.; Berman, B. L.; Bianchi, N.; Biselli, A. S.; Boiarinov, S.; Bonner, B. E.; Bouchigny, S.; Bradford, R.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Butuceanu, C.; Calarco, J. R.; Carman, D. S.; Carnahan, B.; Cetina, C.; Ciciani, L.; Cole, P. L.; Coleman, A.; Cords, A. D.; Corvisiero, P.; Crabb, D.; Crannell, H.; Cummings, J. P.; de Sanctis, E.; DeVita, R.; Degtyarenko, P. V.; Denizli, H.; Dennis, L.; Dharmawardane, K. V.; Dhuga, K. S.; Djalali, C.; Dodge, G. E.; Doughty, D.; Dragovitsch, P.; Dugger, Michael; Dytman, S.; Eckhause, M.; Egiyan, H.; Egiyan, K. S.; Elouadrhiri, L.; Empl, A.; Eugenio, P.; Fatemi, R.; Feuerbach, R. J.; Ficenec, J.; Forest, T. A.; Funsten, H.; Gaff, S. J.; Gavalian, G.; Gilad, S.; Gilfoyle, G. P.; Giovanetti, K. L.; Girard, P.; Gordon, C. I O; Griffioen, K.; Guidal, M.; Guillo, M.; Guo, L.; Gyurjyan, V.; Hadjidakis, C.; Hakobyan, R.; Hardie, J.; Heddle, D.; Heimberg, P.; Hersman, F. W.; Hicks, K.; Hicks, R. S.; Holtrop, M.; Hu, J.; Hyde-Wright, C. E.; Ilieva, Y.; Ito, M. M.; Jenkins, D.; Joo, K.; Kelley, J. H.; Khandaker, M.; Kim, K. Y.; Kim, K.; Kim, W.; Klein, A.; Klein, F. J.; Klimenko, A. V.; Klusman, M.; Kossov, M.; Kramer, L. H.; Kuang, Y.; Kuhn, S. E.; Lachniet, J.; Laget, J. M.; Lawrence, D.; Li, J.; Lukashin, K.; Manak, J. J.; Marchand, C.; McAleer, S.; McCarthy, J.; Mecking, B. A.; Mehrabyan, S.; Melone, J. J.; Mestayer, M. D.; Meyer, C. A.; Mikhailov, K.; Minehart, R.; Mirazita, M.; Miskimen, R.; Morand, L.; Morrow, S. A.; Muccifora, V.; Mueller, J.; Mutchler, G. S.; Napolitano, J.; Nasseripour, R.; Nelson, S. O.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Niczyporuk, B. B.; Niyazov, R. A.; Nozar, M.; O'Brien, J. T.; O'Rielly, G. V.; Osipenko, M.; Park, K.; Pasyuk, E.; Peterson, G.; Philips, S. A.; Pivnyuk, N.; Pocanic, D.; Pogorelko, O.; Polli, E.; 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.; Rossi, P.; Rowntree, D.; Rubin, P. D.; Sabatié, F.; Sabourov, K.; Salgado, C.; Santoro, J. P.; Sapunenko, V.; Serov, V. S.; Shafi, A.; Sharabian, Y. G.; Shaw, J.; Simionatto, S.; Skabelin, A. V.; Smith, E. S.; Smith, L. C.; Sober, D. I.; Spraker, M.; Stavinsky, A.; Stepanyan, S.; Stoler, P.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Taylor, S.; Tedeschi, D. J.; Thoma, U.; Thompson, R.; Tur, C.; Ungaro, M.; Vineyard, M. F.; Vlassov, A. V.; Wang, K.; Weinstein, L. B.; Weisberg, A.; Weller, H.; Weygand, D. P.; Whisnant, C. S.; Wolin, E.; Wood, M. H.; Yegneswaran, A.; Yun, J.; Zhang, B.; Zhao, J.; Zhou, Z.
In: Physical Review C - Nuclear Physics, Vol. 69, No. 4, 042201, 04.2004, p. 042201-1-042201-5.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hyperon photoproduction in the nucleon resonance region
AU - McNabb, J. W C
AU - Schumacher, R. A.
AU - Todor, L.
AU - Adams, G.
AU - Anciant, E.
AU - Anghinolfi, M.
AU - Asavapibhop, B.
AU - Audit, G.
AU - Auger, T.
AU - Avakian, H.
AU - Bagdasaryan, H.
AU - Ball, J. P.
AU - Barrow, S.
AU - Battaglieri, M.
AU - Beard, K.
AU - Bektasoglu, M.
AU - Bellis, M.
AU - Berman, B. L.
AU - Bianchi, N.
AU - Biselli, A. S.
AU - Boiarinov, S.
AU - Bonner, B. E.
AU - Bouchigny, S.
AU - Bradford, R.
AU - Branford, D.
AU - Briscoe, W. J.
AU - Brooks, W. K.
AU - Burkert, V. D.
AU - Butuceanu, C.
AU - Calarco, J. R.
AU - Carman, D. S.
AU - Carnahan, B.
AU - Cetina, C.
AU - Ciciani, L.
AU - Cole, P. L.
AU - Coleman, A.
AU - Cords, A. D.
AU - Corvisiero, P.
AU - Crabb, D.
AU - Crannell, H.
AU - Cummings, J. P.
AU - de Sanctis, E.
AU - DeVita, R.
AU - Degtyarenko, P. V.
AU - Denizli, H.
AU - Dennis, L.
AU - Dharmawardane, K. V.
AU - Dhuga, K. S.
AU - Djalali, C.
AU - Dodge, G. E.
AU - Doughty, D.
AU - Dragovitsch, P.
AU - Dugger, Michael
AU - Dytman, S.
AU - Eckhause, M.
AU - Egiyan, H.
AU - Egiyan, K. S.
AU - Elouadrhiri, L.
AU - Empl, A.
AU - Eugenio, P.
AU - Fatemi, R.
AU - Feuerbach, R. J.
AU - Ficenec, J.
AU - Forest, T. A.
AU - Funsten, H.
AU - Gaff, S. J.
AU - Gavalian, G.
AU - Gilad, S.
AU - Gilfoyle, G. P.
AU - Giovanetti, K. L.
AU - Girard, P.
AU - Gordon, C. I O
AU - Griffioen, K.
AU - Guidal, M.
AU - Guillo, M.
AU - Guo, L.
AU - Gyurjyan, V.
AU - Hadjidakis, C.
AU - Hakobyan, R.
AU - Hardie, J.
AU - Heddle, D.
AU - Heimberg, P.
AU - Hersman, F. W.
AU - Hicks, K.
AU - Hicks, R. S.
AU - Holtrop, M.
AU - Hu, J.
AU - Hyde-Wright, C. E.
AU - Ilieva, Y.
AU - Ito, M. M.
AU - Jenkins, D.
AU - Joo, K.
AU - Kelley, J. H.
AU - Khandaker, M.
AU - Kim, K. Y.
AU - Kim, K.
AU - Kim, W.
AU - Klein, A.
AU - Klein, F. J.
AU - Klimenko, A. V.
AU - Klusman, M.
AU - Kossov, M.
AU - Kramer, L. H.
AU - Kuang, Y.
AU - Kuhn, S. E.
AU - Lachniet, J.
AU - Laget, J. M.
AU - Lawrence, D.
AU - Li, J.
AU - Lukashin, K.
AU - Manak, J. J.
AU - Marchand, C.
AU - McAleer, S.
AU - McCarthy, J.
AU - Mecking, B. A.
AU - Mehrabyan, S.
AU - Melone, J. J.
AU - Mestayer, M. D.
AU - Meyer, C. A.
AU - Mikhailov, K.
AU - Minehart, R.
AU - Mirazita, M.
AU - Miskimen, R.
AU - Morand, L.
AU - Morrow, S. A.
AU - Muccifora, V.
AU - Mueller, J.
AU - Mutchler, G. S.
AU - Napolitano, J.
AU - Nasseripour, R.
AU - Nelson, S. O.
AU - Niccolai, S.
AU - Niculescu, G.
AU - Niculescu, I.
AU - Niczyporuk, B. B.
AU - Niyazov, R. A.
AU - Nozar, M.
AU - O'Brien, J. T.
AU - O'Rielly, G. V.
AU - Osipenko, M.
AU - Park, K.
AU - Pasyuk, E.
AU - Peterson, G.
AU - Philips, S. A.
AU - Pivnyuk, N.
AU - Pocanic, D.
AU - Pogorelko, O.
AU - Polli, E.
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 - Rossi, P.
AU - Rowntree, D.
AU - Rubin, P. D.
AU - Sabatié, F.
AU - Sabourov, K.
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 - Simionatto, S.
AU - Skabelin, A. V.
AU - Smith, E. S.
AU - Smith, L. C.
AU - Sober, D. I.
AU - Spraker, M.
AU - Stavinsky, A.
AU - Stepanyan, S.
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 - Tur, C.
AU - Ungaro, M.
AU - Vineyard, M. F.
AU - Vlassov, A. V.
AU - Wang, K.
AU - Weinstein, L. B.
AU - Weisberg, A.
AU - Weller, H.
AU - Weygand, D. P.
AU - Whisnant, C. S.
AU - Wolin, E.
AU - Wood, M. H.
AU - Yegneswaran, A.
AU - Yun, J.
AU - Zhang, B.
AU - Zhao, J.
AU - Zhou, Z.
PY - 2004/4
Y1 - 2004/4
N2 - High-statistics cross sections and recoil polarizations for the reactions γ+p → K+ + Λ and γ+p → K+ Σ0 have been measured at CLAS for center-of-mass energies between 1.6 and 2.3 GeV. In the K+λ channel we confirm a resonance-like structure near W= 1.9 GeV at backward kaon angles. Our data show more complex s-and u- channel behavior than previously seen, since structure is also present at forward angles, but not at central angles. The position and width change with angle, indicating that more than one resonance is playing a role. Large positive Λ polarization at backward angles, which is also energy dependent, is consistent with sizable s- or u-channel contributions. Presently available model calculations cannot explain these aspects of the data.
AB - High-statistics cross sections and recoil polarizations for the reactions γ+p → K+ + Λ and γ+p → K+ Σ0 have been measured at CLAS for center-of-mass energies between 1.6 and 2.3 GeV. In the K+λ channel we confirm a resonance-like structure near W= 1.9 GeV at backward kaon angles. Our data show more complex s-and u- channel behavior than previously seen, since structure is also present at forward angles, but not at central angles. The position and width change with angle, indicating that more than one resonance is playing a role. Large positive Λ polarization at backward angles, which is also energy dependent, is consistent with sizable s- or u-channel contributions. Presently available model calculations cannot explain these aspects of the data.
UR - http://www.scopus.com/inward/record.url?scp=80051546303&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051546303&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.69.042201
DO - 10.1103/PhysRevC.69.042201
M3 - Article
AN - SCOPUS:80051546303
VL - 69
SP - 042201-1-042201-5
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 4
M1 - 042201
ER -