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Autores principales:	GlueX Collaboration, 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. V., Black, T., Boeglin, W., Briscoe, W. J., Britton, T., Brooks, W. K., Byer, D., Chudakov, E., Cole, P. L., Cortes, O., Crede, V., Dalton, M. M., Darulis, D., Deur, A., Dobbs, S., Dolgolenko, A., Dotel, R., Dugger, M., Dzhygadlo, R., Ebersole, D., Egiyan, H., Erbora, T., Eugenio, P., Fabrizi, A., Fanelli, C., Fang, S., Fegan, S., Fitches, J., Foda, A. M., Furletov, S., Gan, L., Gao, H., Gardner, A., Gasparian, A., Gleason, C., Goetzen, K., Goryachev, V. S., Grube, B., Guo, J., Guo, L., Hague, T. J., Hakobyan, H., Hernandez, J., Hoffman, N. D., Hornidge, D., Hou, G., Huber, G. M., Hurck, P., Hurley, A., Imoehl, W., Ireland, D. G., Ito, M. M., Jaegle, I., Jarvis, N. S., Jeske, T., Jones, R. T., Kakoyan, V., Kalicy, G., Khachatryan, V., Khatchatryan, M., Kourkoumelis, C., LaDuke, A., Larin, I., Lawrence, D., Lersch, D. I., Li, H., Li, W. B., Liu, B., Livingston, K., Lolos, G. J., Lorenti, L., Lyubovitskij, V., Mack, D., Mahmood, A., Martel, P. P., Marukyan, H., Matveev, V., McCaughan, M., McCracken, M., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mizutani, K., Neelamana, V., Ng, L., Nissen, E., Orei, 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. 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., Sharp, P., Shen, X., Shepherd, M. R., Smith, A., Smith, E. S., Sober, D. I., Somov, S., Somov, A., 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., Williams, M., Wunderlich, Y., Yu, B., Zarling, J., Zhang, Z., Zhao, Z., Zhou, X., Zhou, J., Zihlmann, B.
Formato:	Preprint
Publicado:	2023
Materias:	Nuclear Experiment High Energy Physics - Experiment
Acceso en línea:	https://arxiv.org/abs/2304.03845
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author	GlueX Collaboration 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. V. Black, T. Boeglin, W. Briscoe, W. J. Britton, T. Brooks, W. K. Byer, D. Chudakov, E. Cole, P. L. Cortes, O. Crede, V. Dalton, M. M. Darulis, D. Deur, A. Dobbs, S. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Ebersole, D. Egiyan, H. Erbora, T. Eugenio, P. Fabrizi, A. Fanelli, C. Fang, S. Fegan, S. Fitches, J. Foda, A. M. Furletov, S. Gan, L. Gao, H. Gardner, A. Gasparian, A. Gleason, C. Goetzen, K. Goryachev, V. S. Grube, B. Guo, J. Guo, L. Hague, T. J. Hakobyan, H. Hernandez, J. Hoffman, N. D. Hornidge, D. Hou, G. Huber, G. M. Hurck, P. Hurley, A. Imoehl, W. Ireland, D. G. Ito, M. M. Jaegle, I. Jarvis, N. S. Jeske, T. Jones, R. T. Kakoyan, V. Kalicy, G. Khachatryan, V. Khatchatryan, M. Kourkoumelis, C. LaDuke, A. Larin, I. Lawrence, D. Lersch, D. I. Li, H. Li, W. B. Liu, B. Livingston, K. Lolos, G. J. Lorenti, L. Lyubovitskij, V. Mack, D. Mahmood, A. Martel, P. P. Marukyan, H. Matveev, V. McCaughan, M. McCracken, M. Meyer, C. A. Miskimen, R. Mitchell, R. E. Mizutani, K. Neelamana, V. Ng, L. Nissen, E. Orei, 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. 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. Sharp, P. Shen, X. Shepherd, M. R. Smith, A. Smith, E. S. Sober, D. I. Somov, S. Somov, A. 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. Williams, M. Wunderlich, Y. Yu, B. Zarling, J. Zhang, Z. Zhao, Z. Zhou, X. Zhou, J. Zihlmann, B.
author_facet	GlueX Collaboration 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. V. Black, T. Boeglin, W. Briscoe, W. J. Britton, T. Brooks, W. K. Byer, D. Chudakov, E. Cole, P. L. Cortes, O. Crede, V. Dalton, M. M. Darulis, D. Deur, A. Dobbs, S. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Ebersole, D. Egiyan, H. Erbora, T. Eugenio, P. Fabrizi, A. Fanelli, C. Fang, S. Fegan, S. Fitches, J. Foda, A. M. Furletov, S. Gan, L. Gao, H. Gardner, A. Gasparian, A. Gleason, C. Goetzen, K. Goryachev, V. S. Grube, B. Guo, J. Guo, L. Hague, T. J. Hakobyan, H. Hernandez, J. Hoffman, N. D. Hornidge, D. Hou, G. Huber, G. M. Hurck, P. Hurley, A. Imoehl, W. Ireland, D. G. Ito, M. M. Jaegle, I. Jarvis, N. S. Jeske, T. Jones, R. T. Kakoyan, V. Kalicy, G. Khachatryan, V. Khatchatryan, M. Kourkoumelis, C. LaDuke, A. Larin, I. Lawrence, D. Lersch, D. I. Li, H. Li, W. B. Liu, B. Livingston, K. Lolos, G. J. Lorenti, L. Lyubovitskij, V. Mack, D. Mahmood, A. Martel, P. P. Marukyan, H. Matveev, V. McCaughan, M. McCracken, M. Meyer, C. A. Miskimen, R. Mitchell, R. E. Mizutani, K. Neelamana, V. Ng, L. Nissen, E. Orei, 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. 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. Sharp, P. Shen, X. Shepherd, M. R. Smith, A. Smith, E. S. Sober, D. I. Somov, S. Somov, A. 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. Williams, M. Wunderlich, Y. Yu, B. Zarling, J. Zhang, Z. Zhao, Z. Zhou, X. Zhou, J. Zihlmann, B.
contents	We report the total and differential cross sections for $J/ψ$ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2~GeV up to 11.44~GeV and over the full kinematic range of momentum transfer squared, $t$. Such coverage facilitates the extrapolation of the differential cross sections to the forward ($t = 0$) point beyond the physical region. The forward cross section is used by many theoretical models and plays an important role in understanding $J/ψ$ photoproduction and its relation to the $J/ψ-$proton interaction. These measurements of $J/ψ$ photoproduction near threshold are also crucial inputs to theoretical models that are used to study important aspects of the gluon structure of the proton, such as the gluon Generalized Parton Distribution (GPD) of the proton, the mass radius of the proton, and the trace anomaly contribution to the proton mass. We observe possible structures in the total cross section energy dependence and find evidence for contributions beyond gluon exchange in the differential cross section close to threshold, both of which are consistent with contributions from open-charm intermediate states.
format	Preprint
id	arxiv_https___arxiv_org_abs_2304_03845
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	Measurement of the J/$ψ$ photoproduction cross section over the full near-threshold kinematic region GlueX Collaboration 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. V. Black, T. Boeglin, W. Briscoe, W. J. Britton, T. Brooks, W. K. Byer, D. Chudakov, E. Cole, P. L. Cortes, O. Crede, V. Dalton, M. M. Darulis, D. Deur, A. Dobbs, S. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Ebersole, D. Egiyan, H. Erbora, T. Eugenio, P. Fabrizi, A. Fanelli, C. Fang, S. Fegan, S. Fitches, J. Foda, A. M. Furletov, S. Gan, L. Gao, H. Gardner, A. Gasparian, A. Gleason, C. Goetzen, K. Goryachev, V. S. Grube, B. Guo, J. Guo, L. Hague, T. J. Hakobyan, H. Hernandez, J. Hoffman, N. D. Hornidge, D. Hou, G. Huber, G. M. Hurck, P. Hurley, A. Imoehl, W. Ireland, D. G. Ito, M. M. Jaegle, I. Jarvis, N. S. Jeske, T. Jones, R. T. Kakoyan, V. Kalicy, G. Khachatryan, V. Khatchatryan, M. Kourkoumelis, C. LaDuke, A. Larin, I. Lawrence, D. Lersch, D. I. Li, H. Li, W. B. Liu, B. Livingston, K. Lolos, G. J. Lorenti, L. Lyubovitskij, V. Mack, D. Mahmood, A. Martel, P. P. Marukyan, H. Matveev, V. McCaughan, M. McCracken, M. Meyer, C. A. Miskimen, R. Mitchell, R. E. Mizutani, K. Neelamana, V. Ng, L. Nissen, E. Orei, 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. 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. Sharp, P. Shen, X. Shepherd, M. R. Smith, A. Smith, E. S. Sober, D. I. Somov, S. Somov, A. 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. Williams, M. Wunderlich, Y. Yu, B. Zarling, J. Zhang, Z. Zhao, Z. Zhou, X. Zhou, J. Zihlmann, B. Nuclear Experiment High Energy Physics - Experiment We report the total and differential cross sections for $J/ψ$ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2~GeV up to 11.44~GeV and over the full kinematic range of momentum transfer squared, $t$. Such coverage facilitates the extrapolation of the differential cross sections to the forward ($t = 0$) point beyond the physical region. The forward cross section is used by many theoretical models and plays an important role in understanding $J/ψ$ photoproduction and its relation to the $J/ψ-$proton interaction. These measurements of $J/ψ$ photoproduction near threshold are also crucial inputs to theoretical models that are used to study important aspects of the gluon structure of the proton, such as the gluon Generalized Parton Distribution (GPD) of the proton, the mass radius of the proton, and the trace anomaly contribution to the proton mass. We observe possible structures in the total cross section energy dependence and find evidence for contributions beyond gluon exchange in the differential cross section close to threshold, both of which are consistent with contributions from open-charm intermediate states.
title	Measurement of the J/$ψ$ photoproduction cross section over the full near-threshold kinematic region
topic	Nuclear Experiment High Energy Physics - Experiment
url	https://arxiv.org/abs/2304.03845

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