First Measurement of $a^0_2(1320)$ Polarized Photoproduction Cross Section

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Main Authors: GlueX Collaboration, Afzal, F., Akondi, C. S., Albrecht, M., Amaryan, M., Arrigo, S., Arroyave, V., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Barton, D., Baturin, V., Berdnikov, V. V., Black, T., Boeglin, W., Boer, M., Briscoe, W. J., Britton, T., Cao, S., Chudakov, E., Chung, G., Cole, P. L., Cortes, O., Crede, V., Dalton, M. M., Darulis, D., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Dzhygadlo, R., Ebersole, D., Edo, M., Egiyan, H., Erbora, T., Eugenio, P., Fabrizi, A., Fanelli, C., Fang, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gardner, A., Gasparian, A., Glazier, D. I., Gleason, C., Goryachev, V. S., Grube, B., Guo, J., Guo, L., Hernandez, J., Hernandez, K., Hoffman, N. D., Hornidge, D., Hou, G., Hurck, P., Hurley, A., Imoehl, W., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jeske, T., Jing, M., Jones, R. T., Kakoyan, V., Kalicy, G., Khachatryan, V., Kourkoumelis, C., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Liu, B., Livingston, K., Lolos, G. J., Lorenti, L., Lyubovitskij, V., Ma, R., Mahmood, A., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Moran, P., Neelamana, V., Ng, L., Nissen, E., Orešić, S., Ostrovidov, A. I., Papandreou, Z., Paudel, C., Pedroni, R., Pentchev, L., Peters, K. J., Prather, E., Veetil, L. Puthiya, Rakshit, S., Reinhold, J., Remington, A., Ritchie, B. G., Ritman, J., Rodriguez, G., Romanov, D., Saldana, K., Salgado, C., Schadmand, S., Schertz, A. M., Scheuer, K., Schick, A., Schmidt, A., Schumacher, R. A., Schwiening, J., Scott, M., Septian, N., Sharp, P., Shen, X., Shepherd, M. R., Sikes, J., Smith, A., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Stevens, J. R., Strakovsky, I. I., Sumner, B., Suresh, K., Tarasov, V. V., Taylor, S., Teymurazyan, A., Thiel, A., Viducic, T., Whitlatch, T., Wickramaarachchi, N., Wunderlich, Y., Yu, B., Zarling, J., Zhang, Z., Zhou, X., Zihlmann, B.
Format: Preprint
Published: 2025
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_version_ 1866916552625881088
author GlueX Collaboration
Afzal, F.
Akondi, C. S.
Albrecht, M.
Amaryan, M.
Arrigo, S.
Arroyave, V.
Asaturyan, A.
Austregesilo, A.
Baldwin, Z.
Barbosa, F.
Barlow, J.
Barriga, E.
Barsotti, R.
Barton, D.
Baturin, V.
Berdnikov, V. V.
Black, T.
Boeglin, W.
Boer, M.
Briscoe, W. J.
Britton, T.
Cao, S.
Chudakov, E.
Chung, G.
Cole, P. L.
Cortes, O.
Crede, V.
Dalton, M. M.
Darulis, D.
Deur, A.
Dobbs, S.
Dolgolenko, A.
Dugger, M.
Dzhygadlo, R.
Ebersole, D.
Edo, M.
Egiyan, H.
Erbora, T.
Eugenio, P.
Fabrizi, A.
Fanelli, C.
Fang, S.
Fitches, J.
Foda, A. M.
Furletov, S.
Gan, L.
Gao, H.
Gardner, A.
Gasparian, A.
Glazier, D. I.
Gleason, C.
Goryachev, V. S.
Grube, B.
Guo, J.
Guo, L.
Hernandez, J.
Hernandez, K.
Hoffman, N. D.
Hornidge, D.
Hou, G.
Hurck, P.
Hurley, A.
Imoehl, W.
Ireland, D. G.
Ito, M. M.
Jaegle, I.
Jarvis, N. S.
Jeske, T.
Jing, M.
Jones, R. T.
Kakoyan, V.
Kalicy, G.
Khachatryan, V.
Kourkoumelis, C.
LaDuke, A.
Larin, I.
Lawrence, D.
Lersch, D. I.
Li, H.
Liu, B.
Livingston, K.
Lolos, G. J.
Lorenti, L.
Lyubovitskij, V.
Ma, R.
Mahmood, A.
Marukyan, H.
Matveev, V.
McCaughan, M.
McCracken, M.
Meyer, C. A.
Miskimen, R.
Mitchell, R. E.
Mizutani, K.
Moran, P.
Neelamana, V.
Ng, L.
Nissen, E.
Orešić, S.
Ostrovidov, A. I.
Papandreou, Z.
Paudel, C.
Pedroni, R.
Pentchev, L.
Peters, K. J.
Prather, E.
Veetil, L. Puthiya
Rakshit, S.
Reinhold, J.
Remington, A.
Ritchie, B. G.
Ritman, J.
Rodriguez, G.
Romanov, D.
Saldana, K.
Salgado, C.
Schadmand, S.
Schertz, A. M.
Scheuer, K.
Schick, A.
Schmidt, A.
Schumacher, R. A.
Schwiening, J.
Scott, M.
Septian, N.
Sharp, P.
Shen, X.
Shepherd, M. R.
Sikes, J.
Smith, A.
Smith, E. S.
Sober, D. I.
Somov, A.
Somov, S.
Stevens, J. R.
Strakovsky, I. I.
Sumner, B.
Suresh, K.
Tarasov, V. V.
Taylor, S.
Teymurazyan, A.
Thiel, A.
Viducic, T.
Whitlatch, T.
Wickramaarachchi, N.
Wunderlich, Y.
Yu, B.
Zarling, J.
Zhang, Z.
Zhou, X.
Zihlmann, B.
author_facet GlueX Collaboration
Afzal, F.
Akondi, C. S.
Albrecht, M.
Amaryan, M.
Arrigo, S.
Arroyave, V.
Asaturyan, A.
Austregesilo, A.
Baldwin, Z.
Barbosa, F.
Barlow, J.
Barriga, E.
Barsotti, R.
Barton, D.
Baturin, V.
Berdnikov, V. V.
Black, T.
Boeglin, W.
Boer, M.
Briscoe, W. J.
Britton, T.
Cao, S.
Chudakov, E.
Chung, G.
Cole, P. L.
Cortes, O.
Crede, V.
Dalton, M. M.
Darulis, D.
Deur, A.
Dobbs, S.
Dolgolenko, A.
Dugger, M.
Dzhygadlo, R.
Ebersole, D.
Edo, M.
Egiyan, H.
Erbora, T.
Eugenio, P.
Fabrizi, A.
Fanelli, C.
Fang, S.
Fitches, J.
Foda, A. M.
Furletov, S.
Gan, L.
Gao, H.
Gardner, A.
Gasparian, A.
Glazier, D. I.
Gleason, C.
Goryachev, V. S.
Grube, B.
Guo, J.
Guo, L.
Hernandez, J.
Hernandez, K.
Hoffman, N. D.
Hornidge, D.
Hou, G.
Hurck, P.
Hurley, A.
Imoehl, W.
Ireland, D. G.
Ito, M. M.
Jaegle, I.
Jarvis, N. S.
Jeske, T.
Jing, M.
Jones, R. T.
Kakoyan, V.
Kalicy, G.
Khachatryan, V.
Kourkoumelis, C.
LaDuke, A.
Larin, I.
Lawrence, D.
Lersch, D. I.
Li, H.
Liu, B.
Livingston, K.
Lolos, G. J.
Lorenti, L.
Lyubovitskij, V.
Ma, R.
Mahmood, A.
Marukyan, H.
Matveev, V.
McCaughan, M.
McCracken, M.
Meyer, C. A.
Miskimen, R.
Mitchell, R. E.
Mizutani, K.
Moran, P.
Neelamana, V.
Ng, L.
Nissen, E.
Orešić, S.
Ostrovidov, A. I.
Papandreou, Z.
Paudel, C.
Pedroni, R.
Pentchev, L.
Peters, K. J.
Prather, E.
Veetil, L. Puthiya
Rakshit, S.
Reinhold, J.
Remington, A.
Ritchie, B. G.
Ritman, J.
Rodriguez, G.
Romanov, D.
Saldana, K.
Salgado, C.
Schadmand, S.
Schertz, A. M.
Scheuer, K.
Schick, A.
Schmidt, A.
Schumacher, R. A.
Schwiening, J.
Scott, M.
Septian, N.
Sharp, P.
Shen, X.
Shepherd, M. R.
Sikes, J.
Smith, A.
Smith, E. S.
Sober, D. I.
Somov, A.
Somov, S.
Stevens, J. R.
Strakovsky, I. I.
Sumner, B.
Suresh, K.
Tarasov, V. V.
Taylor, S.
Teymurazyan, A.
Thiel, A.
Viducic, T.
Whitlatch, T.
Wickramaarachchi, N.
Wunderlich, Y.
Yu, B.
Zarling, J.
Zhang, Z.
Zhou, X.
Zihlmann, B.
contents We measure for the first time the differential photoproduction cross section $dσ/dt$ of the $a_2(1320)$ meson at an average photon beam energy of 8.5~GeV, using data with an integrated luminosity of 104~pb$^{-1}$ collected by the GlueX experiment. We fully reconstruct the $γp \to ηπ^0 p$ reaction and perform a partial-wave analysis in the $a_2(1320)$ mass region with amplitudes that incorporate the linear polarization of the beam. This allows us to separate for the first time the contributions of natural- and unnatural-parity exchanges. These measurements provide novel information about the photoproduction mechanism, which is critical for the search for spin-exotic states.
format Preprint
id arxiv_https___arxiv_org_abs_2501_03091
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle First Measurement of $a^0_2(1320)$ Polarized Photoproduction Cross Section
GlueX Collaboration
Afzal, F.
Akondi, C. S.
Albrecht, M.
Amaryan, M.
Arrigo, S.
Arroyave, V.
Asaturyan, A.
Austregesilo, A.
Baldwin, Z.
Barbosa, F.
Barlow, J.
Barriga, E.
Barsotti, R.
Barton, D.
Baturin, V.
Berdnikov, V. V.
Black, T.
Boeglin, W.
Boer, M.
Briscoe, W. J.
Britton, T.
Cao, S.
Chudakov, E.
Chung, G.
Cole, P. L.
Cortes, O.
Crede, V.
Dalton, M. M.
Darulis, D.
Deur, A.
Dobbs, S.
Dolgolenko, A.
Dugger, M.
Dzhygadlo, R.
Ebersole, D.
Edo, M.
Egiyan, H.
Erbora, T.
Eugenio, P.
Fabrizi, A.
Fanelli, C.
Fang, S.
Fitches, J.
Foda, A. M.
Furletov, S.
Gan, L.
Gao, H.
Gardner, A.
Gasparian, A.
Glazier, D. I.
Gleason, C.
Goryachev, V. S.
Grube, B.
Guo, J.
Guo, L.
Hernandez, J.
Hernandez, K.
Hoffman, N. D.
Hornidge, D.
Hou, G.
Hurck, P.
Hurley, A.
Imoehl, W.
Ireland, D. G.
Ito, M. M.
Jaegle, I.
Jarvis, N. S.
Jeske, T.
Jing, M.
Jones, R. T.
Kakoyan, V.
Kalicy, G.
Khachatryan, V.
Kourkoumelis, C.
LaDuke, A.
Larin, I.
Lawrence, D.
Lersch, D. I.
Li, H.
Liu, B.
Livingston, K.
Lolos, G. J.
Lorenti, L.
Lyubovitskij, V.
Ma, R.
Mahmood, A.
Marukyan, H.
Matveev, V.
McCaughan, M.
McCracken, M.
Meyer, C. A.
Miskimen, R.
Mitchell, R. E.
Mizutani, K.
Moran, P.
Neelamana, V.
Ng, L.
Nissen, E.
Orešić, S.
Ostrovidov, A. I.
Papandreou, Z.
Paudel, C.
Pedroni, R.
Pentchev, L.
Peters, K. J.
Prather, E.
Veetil, L. Puthiya
Rakshit, S.
Reinhold, J.
Remington, A.
Ritchie, B. G.
Ritman, J.
Rodriguez, G.
Romanov, D.
Saldana, K.
Salgado, C.
Schadmand, S.
Schertz, A. M.
Scheuer, K.
Schick, A.
Schmidt, A.
Schumacher, R. A.
Schwiening, J.
Scott, M.
Septian, N.
Sharp, P.
Shen, X.
Shepherd, M. R.
Sikes, J.
Smith, A.
Smith, E. S.
Sober, D. I.
Somov, A.
Somov, S.
Stevens, J. R.
Strakovsky, I. I.
Sumner, B.
Suresh, K.
Tarasov, V. V.
Taylor, S.
Teymurazyan, A.
Thiel, A.
Viducic, T.
Whitlatch, T.
Wickramaarachchi, N.
Wunderlich, Y.
Yu, B.
Zarling, J.
Zhang, Z.
Zhou, X.
Zihlmann, B.
Nuclear Experiment
High Energy Physics - Experiment
We measure for the first time the differential photoproduction cross section $dσ/dt$ of the $a_2(1320)$ meson at an average photon beam energy of 8.5~GeV, using data with an integrated luminosity of 104~pb$^{-1}$ collected by the GlueX experiment. We fully reconstruct the $γp \to ηπ^0 p$ reaction and perform a partial-wave analysis in the $a_2(1320)$ mass region with amplitudes that incorporate the linear polarization of the beam. This allows us to separate for the first time the contributions of natural- and unnatural-parity exchanges. These measurements provide novel information about the photoproduction mechanism, which is critical for the search for spin-exotic states.
title First Measurement of $a^0_2(1320)$ Polarized Photoproduction Cross Section
topic Nuclear Experiment
High Energy Physics - Experiment
url https://arxiv.org/abs/2501.03091