Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2–8.8GeV

Adhikari, S. et al. (2023) Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2–8.8GeV. Physical Review C, 108(5), 055204. (doi: 10.1103/PhysRevC.108.055204)

Abstract

The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized 8.5GeV photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neutral particles. We present measurements of spin-density matrix elements for the photoproduction of the vector meson ρ(770). The statistical precision achieved exceeds that of previous experiments for polarized photoproduction in this energy range by orders of magnitude. We confirm a high degree of s-channel helicity conservation at small squared four-momentum transfer t and are able to extract the t dependence of natural- and unnatural-parity exchange contributions to the productionprocess in detail. We confirm the dominance of natural-parity exchange over the full t range. We also find that helicity amplitudes in which the helicity of the incident photon and the photoproduced ρ(770) differ by two units are negligible for −t<0.5GeV2/c2.

• Item Type: Articles
• Additional Information: The analysis in this article was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DOE Grant No. DE-FG02- 87ER40315. The work of A.A. was supported by the DOE, Office of Science, Office of Nuclear Physics in the Early Career Program.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Livingston, Dr Kenneth and Hurck, Dr Peter and Fitches, Jamie and Darulis, Mr Darius and Ireland, Professor David
• Authors: Adhikari, S., Afzal, F., Akondi, C. S., Albrecht, M., Amaryan, M., Arroyave, V., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Beattie, T. D., Berdnikov, V., Black, T., Boeglin, W., Briscoe, W., Britton, T., Brooks, W. K., Byer, D., Chudakov, E., Cole, P., Cortes, O., Crede, V., Macrae Dalton, M., Darulis, D., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Ebersole, D., Edo, M., Egiyan, H., Erbora, T., Eugenio, P., Fabrizi, A., Fanelli, C., Fang, S., Fegan, S., Fitches, J., Marwan Foda, A., Furletov, S., Gan, L., Gao, H., Gardner, A., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V., Grube, B., Guo, J., Guo, L., Hague, T.J., Hakobyan, H., Hernandez, J., Hoffman, N., Hornidge, D., Hou, G., Huber, G. M., Hurck, P., Hurley, A., Imoehl, W., Ireland, D., Ito, M., Jaegle, I., Jarvis, N., Jeske, T., Jones, R., Kakoyan, V., Kalicy, G., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., LaDuke, A., Larin, I., Lawrence, D., Lersch, D., Li, H., Liu, B., Livingston, K., Lolos, G. J., Lorenti, L., Lyubovitskij, V., Ma, R., Mack, D., Mahmood, A., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C.A., Miskimen, R., Mitchell, R., Mizutani, K., Neelamana, V., Ng, L., Nissen, E., Orešić, S., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pedroni, R., Pentchev, L., Peters, K. J., Prather, E., Rakshit, S., Reinhold, J., Remington, A., Ritchie, B., Ritman, J., Rodriguez Linera, G., Romanov, D., Saldana, K., Salgado, C., Schadmand, S., Schertz, A., Scheuer, K., Schick, A., William Schmidt, A., Schumacher, R., Schwiening, J., Sharp, P., Shen, X., Shepherd, M., Smith, A., Smith, E.S., Sober, D. I., Somov, A., Somov, S., Stevens, J.R., Strakovsky, I., Sumner, B., Suresh, K., Tarasov, V., Taylor, S., Teymurazyan, A., Thiel, A., Viducic, T., Whitlatch, T., Wickramaarachchi, N., Williams, M., Wunderlich, Y., Yu, B., Zarling, J., Zhang, Z., Zhao, Z., Zhou, J., Zhou, X., and Zihlmann, B.
• College/School: College of Science and Engineering; College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review C
• Publisher: American Physical Society
• ISSN: 2469-9985
• ISSN (Online): 2469-9993

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