用CLAS12探测器测量$\gamma_v p \to \pi^+ \pi^-p'$在$Q^2$为2.4-8.0 GeV$^2$和$W$为1.4-2.1 GeV范围内的截面
Measurements of $γ_v p \to π^+ π^-p'$ Cross Sections with the CLAS12 Detector for $Q^2$ from 2.4-8.0 GeV$^2$ and $W$ from 1.4-2.1 GeV
K. Neupane, R. W. Gothe, D. S. Carman, V. I. Mokeev, A. G. Acar, P. Achenbach, J. S. Alvarado, W. R. Armstrong, H. Avakian, N. A. Baltzell, L. Barion, M. Bashkanov, M. Battaglieri, F. Benmokhtar, A. Bianconi, A. S. Biselli, A. Biswas, F. Bossù, S. Boiarinov, M. Bondi, K. -Th. Brinkmann, W. J. Briscoe, W. K. Brooks, J. Bryce, N. L. Bucuru R., V. D. Burkert, T. Cao, A. Celentano, P. Chatagnon, V. Chesnokov, H. Chinchay, G. Ciullo, E. W. Cline, P. L. Cole, M. Contalbrigo, A. D'Angelo, N. Dashyan, R. De Vita, A. Deur, S. Diehl, C. Dilks, C. Djalali, R. Dupre, H. Egiyan, M. Ehrhart, A. El Alaoui, L. El Fassi, L. Elouadrhiri, C. Fanelli, M. Farooq, S. Fegan, I. P. Fernando, E. Ferrand, A. Filippi, M. Filippini, C. Fogler, S. Frantzen, K. Gates, G. P. Gilfoyle, D. I. Glazier, Y. Gotra, S. Gramigna, B. Gualtieri, K. Hafidi, F. Hauenstein, T. B. Hayward, D. Heddle, T. Hellstern, M. Hoballah, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, T. Kageya, M. Kerr, V. Klimenko, A. Kripko, V. Kubarovsky, C. Lama, L. Lanza, S. Lee, P. Lenisa, X. Li, D. Martiryan, V. Mascagna, M. Masud, B. McKinnon, A. Mehta, R. G. Milner, R. Milton, M. Mirazita, E. F. Molina Cardenas, C. Munoz Camacho, P. Nadel-Turonski, T. Nagorna, S. Niccolai, G. Niculescu, M. Osipenko, A. Osmond, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, C. Paudel, S. J. Paul, N. Pilleux, L. Polizzi, J. Poudel, Y. Prok, A. Radic, K. Ramage, B. A. Raue, M. Ripani, M. Ronayette, P. Rossi, A. A. Rusova, C. Salgado, S. Schadmand, A. Schmidt, Y. G. Sharabian, S. Shrestha, U. Shrestha, E. Sidoretti, Iu. A. Skorodumina, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, M. Tenorio, F. Touchte Codjo, N. Tyler, R. Tyson, M. Ungaro, S. Vallarino, C. Velasquez, L. Venturelli, H. Voskanyan, E. Voutier, Y. Wang, D. P. Watts, U. Weerasinghe, X. Wei, N. Wuerfel, Z. Xu, Z. W. Zhao, M. Zurek
arXiv 2609.19395首次发表：更新：
发表机构
Thomas Jefferson National Accelerator Facility; University of South Carolina; University of York; Christopher Newport University; Argonne National Laboratory; INFN, Sezione di Ferrara; INFN, Sezione di Genova; Duquesne University（托马斯·杰斐逊国家加速器设施; 南卡罗来纳大学; 约克大学; 克里斯托弗纽波特大学; 阿贡国家实验室; 意大利核物理研究所，费拉拉分部; 意大利核物理研究所，热那亚分部; 杜肯大学）
机构由 AI 辅助整理，请以论文原文为准。
AI 中文总结
本文利用CLAS12探测器首次测量了$Q^2$达8.0 GeV$^2$的$\gamma_v p \to \pi^+ \pi^-p'$独家截面，扩展了核子共振区运动学覆盖，为提取$N^*$电耦合参数和理解其结构提供关键数据。
This paper reports exclusive cross sections for the $ep \to e'π^+π^-p'$ reaction using the CLAS12 detector at Jefferson Laboratory. The extractions of fully integrated and nine single-differential cross sections are presented for the first time for photon virtualities $Q^2$ from 2.4 to 8.0 GeV$^2$ and center-of-mass energies $W$ from 1.4 to 2.1 GeV, which covers a large part of the nucleon resonance region. These data considerably extend the kinematic reach of previous measurements from CLAS that covered $Q^2$ up to 5.0 GeV$^2$. Exclusive $γ_v p \to π^+ π^-p'$ cross section measurements are of particular importance for the extraction of $γ_vpN^*$ resonance electrocouplings across the $N^*$ spectrum, especially in the mass range above 1.6 GeV where several resonances decay preferentially to the $ππN$ final states. The electrocouplings with extended $Q^2$ coverage expected from these new data will enable an improved understanding of the emergence of $N^*$ mass and structure in the transition from the strongly coupled toward the perturbative QCD regime.
