Differential cross sections and recoil polarizations for the reaction γp→K+Σ0

B. Dey, C. A. Meyer, M. Bellis, M. E. McCracken, M. Williams, K. P. Adhikari, M. Aghasyan, M. Anghinolfi, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, B. L. Berman, A. S. Biselli, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, V. CredeA. D'Angelo, A. Daniel, R. De Vita, E. De Sanctis, A. Deur, S. Dhamija, R. Dickson, C. Djalali, D. Doughty, Michael Dugger, R. Dupre, A. El Alaoui, L. El Fassi, P. Eugenio, S. Fegan, A. Fradi, M. Y. Gabrielyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, W. Gohn, R. W. Gothe, L. Graham, K. A. Griffioen, N. Guler, L. Guo, K. Hafidi, H. Hakobyan, C. Hanretty, N. Hassall, K. Hicks, M. Holtrop, Y. Ilieva, D. G. Ireland, S. S. Jawalkar, H. S. Jo, K. Joo, D. Keller, M. Khandaker, P. Khetarpal, A. Kim, W. Kim, A. Klein, F. J. Klein, P. Konczykowski, V. Kubarovsky, S. V. Kuleshov, V. Kuznetsov, K. Livingston, I. J D MacGregor, D. Martinez, J. McAndrew, B. McKinnon, K. Mikhailov, M. Mirazita, V. Mokeev, B. Moreno, K. Moriya, B. Morrison, H. Moutarde, E. Munevar, P. Nadel-Turonski, R. Nasseripour, C. S. Nepali, A. Ni, S. Niccolai, G. Niculescu, I. Niculescu, M. R. Niroula, M. Osipenko, A. I. Ostrovidov, R. Paremuzyan, K. Park, S. Park, E. Pasyuk, S. Anefalos Pereira, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, J. Salamanca, C. Salgado, D. Schott, R. A. Schumacher, E. Seder, H. Seraydaryan, Y. G. Sharabian, E. S. Smith, G. D. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, I. I. Strakovsky, S. Strauch, W. Tang, C. E. Taylor, D. J. Tedeschi, S. Tkachenko, M. Ungaro, D. P. Watts, B. Vernarsky, M. F. Vineyard, E. Voutier, L. B. Weinstein, M. H. Wood, A. Yegneswaran, J. Zhang, B. Zhao, Z. W. Zhao

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

High-statistics measurements of differential cross sections and recoil polarizations for the reaction γp→K+Σ0 have been obtained using the CLAS detector at Jefferson Lab. We cover center-of-mass energies (√s) from 1.69 to 2.84 GeV, with an extensive coverage in the K+ production angle. Independent measurements were made using the K+-(γ) and K+p(π-, γ) final-state topologies, and were found to exhibit good agreement. Our differential cross sections show good agreement with earlier CLAS, SAPHIR, and LEPS results, while offering better statistical precision and a 300-MeV increase in √s coverage. Above √s≈2.5 GeV, t- and u-channel Regge scaling behavior can be seen at forward and backward angles, respectively. Our recoil polarization (PΣ) measurements represent a substantial increase in kinematic coverage and enhanced precision over previous world data. At forward angles, we find that PΣ is of the same order of magnitude but opposite sign as PΛ, in agreement with the static SU(6) quark model prediction of PΣ≈PΛ. This expectation is violated in some mid- and backward-angle kinematic regimes, where PΣ and PΛ are of similar magnitudes but also have the same signs. In conjunction with several other meson photoproduction results recently published by CLAS, the present data will help constrain the partial-wave analyses being performed to search for missing baryon resonances.

Original languageEnglish (US)
Article number025202
JournalPhysical Review C - Nuclear Physics
Volume82
Issue number2
DOIs
StatePublished - Aug 6 2010

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cross sections
polarization
kinematics
baryon resonance
photoproduction
quark models
center of mass
topology
mesons
statistics
scaling
detectors
predictions
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Dey, B., Meyer, C. A., Bellis, M., McCracken, M. E., Williams, M., Adhikari, K. P., ... Zhao, Z. W. (2010). Differential cross sections and recoil polarizations for the reaction γp→K+Σ0. Physical Review C - Nuclear Physics, 82(2), [025202]. https://doi.org/10.1103/PhysRevC.82.025202

Differential cross sections and recoil polarizations for the reaction γp→K+Σ0. / Dey, B.; Meyer, C. A.; Bellis, M.; McCracken, M. E.; Williams, M.; Adhikari, K. P.; Aghasyan, M.; Anghinolfi, M.; Ball, J.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Berman, B. L.; Biselli, A. S.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Carman, D. S.; Crede, V.; D'Angelo, A.; Daniel, A.; De Vita, R.; De Sanctis, E.; Deur, A.; Dhamija, S.; Dickson, R.; Djalali, C.; Doughty, D.; Dugger, Michael; Dupre, R.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fegan, S.; Fradi, A.; Gabrielyan, M. Y.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Gohn, W.; Gothe, R. W.; Graham, L.; Griffioen, K. A.; Guler, N.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Hassall, N.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Jawalkar, S. S.; Jo, H. S.; Joo, K.; Keller, D.; Khandaker, M.; Khetarpal, P.; Kim, A.; Kim, W.; Klein, A.; Klein, F. J.; Konczykowski, P.; Kubarovsky, V.; Kuleshov, S. V.; Kuznetsov, V.; Livingston, K.; MacGregor, I. J D; Martinez, D.; McAndrew, J.; McKinnon, B.; Mikhailov, K.; Mirazita, M.; Mokeev, V.; Moreno, B.; Moriya, K.; Morrison, B.; Moutarde, H.; Munevar, E.; Nadel-Turonski, P.; Nasseripour, R.; Nepali, C. S.; Ni, A.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Niroula, M. R.; Osipenko, M.; Ostrovidov, A. I.; Paremuzyan, R.; Park, K.; Park, S.; Pasyuk, E.; Pereira, S. Anefalos; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Protopopescu, D.; Raue, B. A.; Ricco, G.; Ripani, M.; Ritchie, Barry; Rosner, G.; Rossi, P.; Salamanca, J.; Salgado, C.; Schott, D.; Schumacher, R. A.; Seder, E.; Seraydaryan, H.; Sharabian, Y. G.; Smith, E. S.; Smith, G. D.; Sober, D. I.; Sokhan, D.; Stepanyan, S. S.; Strakovsky, I. I.; Strauch, S.; Tang, W.; Taylor, C. E.; Tedeschi, D. J.; Tkachenko, S.; Ungaro, M.; Watts, D. P.; Vernarsky, B.; Vineyard, M. F.; Voutier, E.; Weinstein, L. B.; Wood, M. H.; Yegneswaran, A.; Zhang, J.; Zhao, B.; Zhao, Z. W.

In: Physical Review C - Nuclear Physics, Vol. 82, No. 2, 025202, 06.08.2010.

Research output: Contribution to journalArticle

Dey, B, Meyer, CA, Bellis, M, McCracken, ME, Williams, M, Adhikari, KP, Aghasyan, M, Anghinolfi, M, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Berman, BL, Biselli, AS, Branford, D, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, Crede, V, D'Angelo, A, Daniel, A, De Vita, R, De Sanctis, E, Deur, A, Dhamija, S, Dickson, R, Djalali, C, Doughty, D, Dugger, M, Dupre, R, El Alaoui, A, El Fassi, L, Eugenio, P, Fegan, S, Fradi, A, Gabrielyan, MY, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Gohn, W, Gothe, RW, Graham, L, Griffioen, KA, Guler, N, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Hassall, N, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, DG, Jawalkar, SS, Jo, HS, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, A, Klein, FJ, Konczykowski, P, Kubarovsky, V, Kuleshov, SV, Kuznetsov, V, Livingston, K, MacGregor, IJD, Martinez, D, McAndrew, J, McKinnon, B, Mikhailov, K, Mirazita, M, Mokeev, V, Moreno, B, Moriya, K, Morrison, B, Moutarde, H, Munevar, E, Nadel-Turonski, P, Nasseripour, R, Nepali, CS, Ni, A, Niccolai, S, Niculescu, G, Niculescu, I, Niroula, MR, Osipenko, M, Ostrovidov, AI, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Pereira, SA, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Salamanca, J, Salgado, C, Schott, D, Schumacher, RA, Seder, E, Seraydaryan, H, Sharabian, YG, Smith, ES, Smith, GD, Sober, DI, Sokhan, D, Stepanyan, SS, Strakovsky, II, Strauch, S, Tang, W, Taylor, CE, Tedeschi, DJ, Tkachenko, S, Ungaro, M, Watts, DP, Vernarsky, B, Vineyard, MF, Voutier, E, Weinstein, LB, Wood, MH, Yegneswaran, A, Zhang, J, Zhao, B & Zhao, ZW 2010, 'Differential cross sections and recoil polarizations for the reaction γp→K+Σ0', Physical Review C - Nuclear Physics, vol. 82, no. 2, 025202. https://doi.org/10.1103/PhysRevC.82.025202
Dey, B. ; Meyer, C. A. ; Bellis, M. ; McCracken, M. E. ; Williams, M. ; Adhikari, K. P. ; Aghasyan, M. ; Anghinolfi, M. ; Ball, J. ; Battaglieri, M. ; Batourine, V. ; Bedlinskiy, I. ; Berman, B. L. ; Biselli, A. S. ; Branford, D. ; Briscoe, W. J. ; Brooks, W. K. ; Burkert, V. D. ; Carman, D. S. ; Crede, V. ; D'Angelo, A. ; Daniel, A. ; De Vita, R. ; De Sanctis, E. ; Deur, A. ; Dhamija, S. ; Dickson, R. ; Djalali, C. ; Doughty, D. ; Dugger, Michael ; Dupre, R. ; El Alaoui, A. ; El Fassi, L. ; Eugenio, P. ; Fegan, S. ; Fradi, A. ; Gabrielyan, M. Y. ; Gilfoyle, G. P. ; Giovanetti, K. L. ; Girod, F. X. ; Gohn, W. ; Gothe, R. W. ; Graham, L. ; Griffioen, K. A. ; Guler, N. ; Guo, L. ; Hafidi, K. ; Hakobyan, H. ; Hanretty, C. ; Hassall, N. ; Hicks, K. ; Holtrop, M. ; Ilieva, Y. ; Ireland, D. G. ; Jawalkar, S. S. ; Jo, H. S. ; Joo, K. ; Keller, D. ; Khandaker, M. ; Khetarpal, P. ; Kim, A. ; Kim, W. ; Klein, A. ; Klein, F. J. ; Konczykowski, P. ; Kubarovsky, V. ; Kuleshov, S. V. ; Kuznetsov, V. ; Livingston, K. ; MacGregor, I. J D ; Martinez, D. ; McAndrew, J. ; McKinnon, B. ; Mikhailov, K. ; Mirazita, M. ; Mokeev, V. ; Moreno, B. ; Moriya, K. ; Morrison, B. ; Moutarde, H. ; Munevar, E. ; Nadel-Turonski, P. ; Nasseripour, R. ; Nepali, C. S. ; Ni, A. ; Niccolai, S. ; Niculescu, G. ; Niculescu, I. ; Niroula, M. R. ; Osipenko, M. ; Ostrovidov, A. I. ; Paremuzyan, R. ; Park, K. ; Park, S. ; Pasyuk, E. ; Pereira, S. Anefalos ; Pogorelko, O. ; Pozdniakov, S. ; Price, J. W. ; Procureur, S. ; Protopopescu, D. ; Raue, B. A. ; Ricco, G. ; Ripani, M. ; Ritchie, Barry ; Rosner, G. ; Rossi, P. ; Salamanca, J. ; Salgado, C. ; Schott, D. ; Schumacher, R. A. ; Seder, E. ; Seraydaryan, H. ; Sharabian, Y. G. ; Smith, E. S. ; Smith, G. D. ; Sober, D. I. ; Sokhan, D. ; Stepanyan, S. S. ; Strakovsky, I. I. ; Strauch, S. ; Tang, W. ; Taylor, C. E. ; Tedeschi, D. J. ; Tkachenko, S. ; Ungaro, M. ; Watts, D. P. ; Vernarsky, B. ; Vineyard, M. F. ; Voutier, E. ; Weinstein, L. B. ; Wood, M. H. ; Yegneswaran, A. ; Zhang, J. ; Zhao, B. ; Zhao, Z. W. / Differential cross sections and recoil polarizations for the reaction γp→K+Σ0. In: Physical Review C - Nuclear Physics. 2010 ; Vol. 82, No. 2.
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title = "Differential cross sections and recoil polarizations for the reaction γp→K+Σ0",
abstract = "High-statistics measurements of differential cross sections and recoil polarizations for the reaction γp→K+Σ0 have been obtained using the CLAS detector at Jefferson Lab. We cover center-of-mass energies (√s) from 1.69 to 2.84 GeV, with an extensive coverage in the K+ production angle. Independent measurements were made using the K+pπ-(γ) and K+p(π-, γ) final-state topologies, and were found to exhibit good agreement. Our differential cross sections show good agreement with earlier CLAS, SAPHIR, and LEPS results, while offering better statistical precision and a 300-MeV increase in √s coverage. Above √s≈2.5 GeV, t- and u-channel Regge scaling behavior can be seen at forward and backward angles, respectively. Our recoil polarization (PΣ) measurements represent a substantial increase in kinematic coverage and enhanced precision over previous world data. At forward angles, we find that PΣ is of the same order of magnitude but opposite sign as PΛ, in agreement with the static SU(6) quark model prediction of PΣ≈PΛ. This expectation is violated in some mid- and backward-angle kinematic regimes, where PΣ and PΛ are of similar magnitudes but also have the same signs. In conjunction with several other meson photoproduction results recently published by CLAS, the present data will help constrain the partial-wave analyses being performed to search for missing baryon resonances.",
author = "B. Dey and Meyer, {C. A.} and M. Bellis and McCracken, {M. E.} and M. Williams and Adhikari, {K. P.} and M. Aghasyan and M. Anghinolfi and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and Berman, {B. L.} and Biselli, {A. S.} and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Carman, {D. S.} and V. Crede and A. D'Angelo and A. Daniel and {De Vita}, R. and {De Sanctis}, E. and A. Deur and S. Dhamija and R. Dickson and C. Djalali and D. Doughty and Michael Dugger and R. Dupre and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and S. Fegan and A. Fradi and Gabrielyan, {M. Y.} and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and W. Gohn and Gothe, {R. W.} and L. Graham and Griffioen, {K. A.} and N. Guler and L. Guo and K. Hafidi and H. Hakobyan and C. Hanretty and N. Hassall and K. Hicks and M. Holtrop and Y. Ilieva and Ireland, {D. G.} and Jawalkar, {S. S.} and Jo, {H. S.} and K. Joo and D. Keller and M. Khandaker and P. Khetarpal and A. Kim and W. Kim and A. Klein and Klein, {F. J.} and P. Konczykowski and V. Kubarovsky and Kuleshov, {S. V.} and V. Kuznetsov and K. Livingston and MacGregor, {I. J D} and D. Martinez and J. McAndrew and B. McKinnon and K. Mikhailov and M. Mirazita and V. Mokeev and B. Moreno and K. Moriya and B. Morrison and H. Moutarde and E. Munevar and P. Nadel-Turonski and R. Nasseripour and Nepali, {C. S.} and A. Ni and S. Niccolai and G. Niculescu and I. Niculescu and Niroula, {M. R.} and M. Osipenko and Ostrovidov, {A. I.} and R. Paremuzyan and K. Park and S. Park and E. Pasyuk and Pereira, {S. Anefalos} and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and S. Procureur and D. Protopopescu and Raue, {B. A.} and G. Ricco and M. Ripani and Barry Ritchie and G. Rosner and P. Rossi and J. Salamanca and C. Salgado and D. Schott and Schumacher, {R. A.} and E. Seder and H. Seraydaryan and Sharabian, {Y. G.} and Smith, {E. S.} and Smith, {G. D.} and Sober, {D. I.} and D. Sokhan and Stepanyan, {S. S.} and Strakovsky, {I. I.} and S. Strauch and W. Tang and Taylor, {C. E.} and Tedeschi, {D. J.} and S. Tkachenko and M. Ungaro and Watts, {D. P.} and B. Vernarsky and Vineyard, {M. F.} and E. Voutier and Weinstein, {L. B.} and Wood, {M. H.} and A. Yegneswaran and J. Zhang and B. Zhao and Zhao, {Z. W.}",
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month = "8",
day = "6",
doi = "10.1103/PhysRevC.82.025202",
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journal = "Physical Review C - Nuclear Physics",
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TY - JOUR

T1 - Differential cross sections and recoil polarizations for the reaction γp→K+Σ0

AU - Dey, B.

AU - Meyer, C. A.

AU - Bellis, M.

AU - McCracken, M. E.

AU - Williams, M.

AU - Adhikari, K. P.

AU - Aghasyan, M.

AU - Anghinolfi, M.

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Crede, V.

AU - D'Angelo, A.

AU - Daniel, A.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Dhamija, S.

AU - Dickson, R.

AU - Djalali, C.

AU - Doughty, D.

AU - Dugger, Michael

AU - Dupre, R.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fegan, S.

AU - Fradi, A.

AU - Gabrielyan, M. Y.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Gohn, W.

AU - Gothe, R. W.

AU - Graham, L.

AU - Griffioen, K. A.

AU - Guler, N.

AU - Guo, L.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hassall, N.

AU - Hicks, K.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Jawalkar, S. S.

AU - Jo, H. S.

AU - Joo, K.

AU - Keller, D.

AU - Khandaker, M.

AU - Khetarpal, P.

AU - Kim, A.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Konczykowski, P.

AU - Kubarovsky, V.

AU - Kuleshov, S. V.

AU - Kuznetsov, V.

AU - Livingston, K.

AU - MacGregor, I. J D

AU - Martinez, D.

AU - McAndrew, J.

AU - McKinnon, B.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Moreno, B.

AU - Moriya, K.

AU - Morrison, B.

AU - Moutarde, H.

AU - Munevar, E.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Nepali, C. S.

AU - Ni, A.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niroula, M. R.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paremuzyan, R.

AU - Park, K.

AU - Park, S.

AU - Pasyuk, E.

AU - Pereira, S. Anefalos

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Rosner, G.

AU - Rossi, P.

AU - Salamanca, J.

AU - Salgado, C.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Seder, E.

AU - Seraydaryan, H.

AU - Sharabian, Y. G.

AU - Smith, E. S.

AU - Smith, G. D.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stepanyan, S. S.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Tang, W.

AU - Taylor, C. E.

AU - Tedeschi, D. J.

AU - Tkachenko, S.

AU - Ungaro, M.

AU - Watts, D. P.

AU - Vernarsky, B.

AU - Vineyard, M. F.

AU - Voutier, E.

AU - Weinstein, L. B.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Zhang, J.

AU - Zhao, B.

AU - Zhao, Z. W.

PY - 2010/8/6

Y1 - 2010/8/6

N2 - High-statistics measurements of differential cross sections and recoil polarizations for the reaction γp→K+Σ0 have been obtained using the CLAS detector at Jefferson Lab. We cover center-of-mass energies (√s) from 1.69 to 2.84 GeV, with an extensive coverage in the K+ production angle. Independent measurements were made using the K+pπ-(γ) and K+p(π-, γ) final-state topologies, and were found to exhibit good agreement. Our differential cross sections show good agreement with earlier CLAS, SAPHIR, and LEPS results, while offering better statistical precision and a 300-MeV increase in √s coverage. Above √s≈2.5 GeV, t- and u-channel Regge scaling behavior can be seen at forward and backward angles, respectively. Our recoil polarization (PΣ) measurements represent a substantial increase in kinematic coverage and enhanced precision over previous world data. At forward angles, we find that PΣ is of the same order of magnitude but opposite sign as PΛ, in agreement with the static SU(6) quark model prediction of PΣ≈PΛ. This expectation is violated in some mid- and backward-angle kinematic regimes, where PΣ and PΛ are of similar magnitudes but also have the same signs. In conjunction with several other meson photoproduction results recently published by CLAS, the present data will help constrain the partial-wave analyses being performed to search for missing baryon resonances.

AB - High-statistics measurements of differential cross sections and recoil polarizations for the reaction γp→K+Σ0 have been obtained using the CLAS detector at Jefferson Lab. We cover center-of-mass energies (√s) from 1.69 to 2.84 GeV, with an extensive coverage in the K+ production angle. Independent measurements were made using the K+pπ-(γ) and K+p(π-, γ) final-state topologies, and were found to exhibit good agreement. Our differential cross sections show good agreement with earlier CLAS, SAPHIR, and LEPS results, while offering better statistical precision and a 300-MeV increase in √s coverage. Above √s≈2.5 GeV, t- and u-channel Regge scaling behavior can be seen at forward and backward angles, respectively. Our recoil polarization (PΣ) measurements represent a substantial increase in kinematic coverage and enhanced precision over previous world data. At forward angles, we find that PΣ is of the same order of magnitude but opposite sign as PΛ, in agreement with the static SU(6) quark model prediction of PΣ≈PΛ. This expectation is violated in some mid- and backward-angle kinematic regimes, where PΣ and PΛ are of similar magnitudes but also have the same signs. In conjunction with several other meson photoproduction results recently published by CLAS, the present data will help constrain the partial-wave analyses being performed to search for missing baryon resonances.

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