Measurement of spin density matrix elements in Λ ( 1520 ) photoproduction at 8.2–8.8 GeV

Journal Article · 03 March 2022 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.105.035201 · OSTI ID:1862834

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

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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Contributing Organization: GlueX Collaboration
• Grant/Contract Number: AC05-06OR23177
• OSTI ID: 1862834
• Report Number(s): JLAB-PHY-22-3597; DOE/OR/23177-5474; arXiv:2107.12314
• Journal Information: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 3 Vol. 105; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English