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Near-Threshold J/$ψ\to μ^+μ^-$ Photoproduction and the Gluonic Gravitational Form Factors of the Proton

Fuente: arXiv

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Autores principales:	007 Collaboration, Joosten, S., Meziani, Z. -E., Prasad, S., Swartz, J., Duran, B., Jones, M. K., Klest, H., Paolone, M., Peng, C., Armstrong, W., Atac, H., Chudakov, E., Bhatt, H., Bhetuwal, D., Boer, M., Camsonne, A., Chen, J. -P., Dalton, M., Deokar, N., Diefenthaler, M., Dunne, J., Fassi, L. El, Flor, F., Fuchey, E., Gao, H., Gaskell, D., Hansen, O., Hauenstein, F., Higinbotham, D., Jia, S., Karki, A., Keppel, C., King, P., Ko, H. S., Li, X., Li, R., Mack, D., Malace, S., McCaughan, M., McClellan, R. E., Michaels, R., Meekins, D., Pentchev, L., Pooser, E., Puckett, A., Radloff, R., Rehfuss, M., Reimer, P. E., Riordan, S., Sawatzky, B., Smith, A., Sparveris, N., Szumila-Vance, H., Wood, S., Xie, J., Ye, Z., Yero, C., Zhao, Z.
Formato:	Preprint
Publicado:	2026
Materias:	Nuclear Experiment High Energy Physics - Experiment
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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author	007 Collaboration Joosten, S. Meziani, Z. -E. Prasad, S. Swartz, J. Duran, B. Jones, M. K. Klest, H. Paolone, M. Peng, C. Armstrong, W. Atac, H. Chudakov, E. Bhatt, H. Bhetuwal, D. Boer, M. Camsonne, A. Chen, J. -P. Dalton, M. Deokar, N. Diefenthaler, M. Dunne, J. Fassi, L. El Flor, F. Fuchey, E. Gao, H. Gaskell, D. Hansen, O. Hauenstein, F. Higinbotham, D. Jia, S. Karki, A. Keppel, C. King, P. Ko, H. S. Li, X. Li, R. Mack, D. Malace, S. McCaughan, M. McClellan, R. E. Michaels, R. Meekins, D. Pentchev, L. Pooser, E. Puckett, A. Radloff, R. Rehfuss, M. Reimer, P. E. Riordan, S. Sawatzky, B. Smith, A. Sparveris, N. Szumila-Vance, H. Wood, S. Xie, J. Ye, Z. Yero, C. Zhao, Z.
author_facet	007 Collaboration Joosten, S. Meziani, Z. -E. Prasad, S. Swartz, J. Duran, B. Jones, M. K. Klest, H. Paolone, M. Peng, C. Armstrong, W. Atac, H. Chudakov, E. Bhatt, H. Bhetuwal, D. Boer, M. Camsonne, A. Chen, J. -P. Dalton, M. Deokar, N. Diefenthaler, M. Dunne, J. Fassi, L. El Flor, F. Fuchey, E. Gao, H. Gaskell, D. Hansen, O. Hauenstein, F. Higinbotham, D. Jia, S. Karki, A. Keppel, C. King, P. Ko, H. S. Li, X. Li, R. Mack, D. Malace, S. McCaughan, M. McClellan, R. E. Michaels, R. Meekins, D. Pentchev, L. Pooser, E. Puckett, A. Radloff, R. Rehfuss, M. Reimer, P. E. Riordan, S. Sawatzky, B. Smith, A. Sparveris, N. Szumila-Vance, H. Wood, S. Xie, J. Ye, Z. Yero, C. Zhao, Z.
contents	We report on the measurement of the two-dimensional differential cross section for near-threshold J/$ψ\to μ^+μ^-$ photoproduction from the J/$ψ$-007 experiment in Hall C at Jefferson Lab. Our results agree with the previously published J/$ψ\to e^+e^-$ results. We extract the integrated photoproduction cross section and find no evidence for open-charm contributions. A combined analysis of both decay channels following a Holographic QCD approach yields improved experimental constraints on the gluonic gravitational form factor $\mathcal{C}_g(t)$. Our results agree with recent lattice QCD calculations and we obtain $\mathcal{C}_g(t)$ with a comparable statistical precision to lattice QCD. Our results support a spatial picture where gluons dominate at larger radii with a confining inward pressure. This work provides new input for exploring the mechanical properties of gluons inside the proton.
format	Preprint
id	arxiv_https___arxiv_org_abs_2602_14416
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Near-Threshold J/$ψ\to μ^+μ^-$ Photoproduction and the Gluonic Gravitational Form Factors of the Proton 007 Collaboration Joosten, S. Meziani, Z. -E. Prasad, S. Swartz, J. Duran, B. Jones, M. K. Klest, H. Paolone, M. Peng, C. Armstrong, W. Atac, H. Chudakov, E. Bhatt, H. Bhetuwal, D. Boer, M. Camsonne, A. Chen, J. -P. Dalton, M. Deokar, N. Diefenthaler, M. Dunne, J. Fassi, L. El Flor, F. Fuchey, E. Gao, H. Gaskell, D. Hansen, O. Hauenstein, F. Higinbotham, D. Jia, S. Karki, A. Keppel, C. King, P. Ko, H. S. Li, X. Li, R. Mack, D. Malace, S. McCaughan, M. McClellan, R. E. Michaels, R. Meekins, D. Pentchev, L. Pooser, E. Puckett, A. Radloff, R. Rehfuss, M. Reimer, P. E. Riordan, S. Sawatzky, B. Smith, A. Sparveris, N. Szumila-Vance, H. Wood, S. Xie, J. Ye, Z. Yero, C. Zhao, Z. Nuclear Experiment High Energy Physics - Experiment We report on the measurement of the two-dimensional differential cross section for near-threshold J/$ψ\to μ^+μ^-$ photoproduction from the J/$ψ$-007 experiment in Hall C at Jefferson Lab. Our results agree with the previously published J/$ψ\to e^+e^-$ results. We extract the integrated photoproduction cross section and find no evidence for open-charm contributions. A combined analysis of both decay channels following a Holographic QCD approach yields improved experimental constraints on the gluonic gravitational form factor $\mathcal{C}_g(t)$. Our results agree with recent lattice QCD calculations and we obtain $\mathcal{C}_g(t)$ with a comparable statistical precision to lattice QCD. Our results support a spatial picture where gluons dominate at larger radii with a confining inward pressure. This work provides new input for exploring the mechanical properties of gluons inside the proton.
title	Near-Threshold J/$ψ\to μ^+μ^-$ Photoproduction and the Gluonic Gravitational Form Factors of the Proton
topic	Nuclear Experiment High Energy Physics - Experiment
url	https://arxiv.org/abs/2602.14416