Measurement of spin density matrix elements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo>(</mml:mo><mml:mn>1520</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> photoproduction at 8.2–8.8 GeV

/ Authors

GlueX Collaboration S. Adhikari, C. Akondi, M. Albrecht, A. Ali, M. Amaryan, A. Asaturyan, A. Austregesilo, Z. Baldwin, F. Barbosa, J. Barlow

and 135 more authors

E. Barriga, R. Barsotti, T. Beattie, V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, T. Britton, W. Brooks, E. Chudakov, S. Cole, P. Cole, O. Cortés, V. Credé, M. Dalton, T. Daniels, A. Deur, S. Dobbs, A. Dolgolenko, R. Dotel, M. Dugger, R. Dzhygadlo, H. Egiyan, T. Erbora, A. Ernst, P. Eugenio, C. Fanelli, S. Fegan, J. Fitches, A. M. Foda, S. Furletov, L. Gan, H. Gao, A. Gasparian, C. Gleason, K. Goetzen, V. Goryachev, L. Guo, M. Hagen, H. Hakobyan, A. Hamdi, J. Hernandez, N. Hoffman, G. Hou, G. Huber, A. Hurley, D. Ireland, M. M. Ito, I. Jaegle, N. Jarvis, R. T. Jones, V. Kakoyan, G. Kalicy, M. Kamel, V. Khachatryan, M. Khatchatryan, C. Kourkoumelis, S. Kuleshov, A. LaDuke, I. Larín, D. Lawrence, D. Lersch, H. Li, W. Li, B. Liu, K. Livingston, G. Lolos, K. Luckas, V. Lyubovitskij, D. Mack, A. Mahmood, H. Marukyan, V. Matveev, M. McCaughan, M. McCracken, C. A. Meyer, R. Miskimen, R. E. Mitchell, K. Mizutani, V. Neelamana, F. Nerling, L. Ng, A. I. Ostrovidov, Z. Papandreou, C. Paudel, P. Pauli, R. Pedroni, L. Pentchev, K. J. Peters, J. Reinhold, B. Ritchie, J. Ritman, G. Rodríguez, D. Romanov, C. Romero, K. Saldana, C. Salgado, S. Schadmand, A. Schertz, A. Schick, A. Schmidt, R. A. Schumacher, J. Schwiening, P. Sharp, X. Shen, M. Shepherd, A. Smith, E. S. Smith, D. Sober, A. Somov, S. Somov, O. Soto, J. Stevens, I. Strakovsky, B. Sumner, K. Suresh, V. Tarasov, S. Taylor, A. Teymurazyan, A. Thiel, G. Vasileiadis, T. Viducic, T. Whitlatch, N. Wickramaarachchi, M. Williams, Y. Yang, J. Zarling, Z. Zhang, Z. Zhao, J. Zhou, X. Zhou, Q. Zhou, B. Zihlmann, D. I. Glazier, V. Mathieu

/ Abstract

We report on the measurement of spin density matrix elements of the $\Lambda(1520)$ in the photoproduction reaction $\gamma p\rightarrow \Lambda(1520)K^+$, via its subsequent decay to $K^{-}p$. The measurement was performed as part of the GlueX experimental program in Hall D at Jefferson Lab using a linearly polarized photon beam with $E_\gamma =$ 8.2-8.8 GeV. These are the first such measurements in this photon energy range. Results are presented in bins of momentum transfer squared, $-(t-t_\text{0})$. We compare the results with a Reggeon exchange model and determine that natural exchange amplitudes are dominant in $\Lambda(1520)$ photoproduction.

Journal: Physical Review C

DOI: 10.1103/PhysRevC.105.035201