Δ⁺⁺(1232)光生过程中自旋密度矩阵元的测量
核实验
2024-07-29 v2
摘要
我们利用杰斐逊实验室Hall D的GlueX实验，在光生反应γp → π⁻Δ⁺⁺(1232)中测量了Δ⁺⁺(1232)的自旋密度矩阵元（SDME）。测量使用了能量为8.2至8.8 GeV的线偏振光子束，在动量转移平方低于1.4 GeV²的区域，SDME的统计精度比之前的测量提高了三个数量级。这些数据对现有Regge交换模型中耦合常数之间先前未确定的相对符号敏感。提取的SDME的线性组合允许分解为自然和非自然交换振幅。我们发现非自然交换在低动量转移区域起着重要作用。
引用
@article{arxiv.2406.12829,
title = {Measurement of Spin-Density Matrix Elements in $\Delta^{++}(1232)$ photoproduction},
author = {F. Afzal and C. S. Akondi and M. Albrecht and M. Amaryan and S. Arrigo and V. Arroyave and A. Asaturyan and A. Austregesilo and Z. Baldwin and F. Barbosa and J. Barlow and E. Barriga and R. Barsotti and D. Barton and V. Baturin and V. V. Berdnikov and T. Black and W. Boeglin and M. Boer and W. J. Briscoe and T. Britton and S. Cao and E. Chudakov and G. Chung and P. L. Cole and O. Cortes and V. Crede and M. M. Dalton and D. Darulis and A. Deur and S. Dobbs and A. Dolgolenko and M. Dugger and R. Dzhygadlo and D. Ebersole and M. Edo and H. Egiyan and T. Erbora and P. Eugenio and A. Fabrizi and C. Fanelli and S. Fang and J. Fitches and A. M. Foda and S. Furletov and L. Gan and H. Gao and A. Gardner and A. Gasparian and D. I. Glazier and C. Gleason and V. S. Goryachev and B. Grube and J. Guo and L. Guo and J. Hernandez and K. Hernandez and N. D. Hoffman and D. Hornidge and G. Hou and P. Hurck and A. Hurley and W. Imoehl and D. G. Ireland and M. M. Ito and I. Jaegle and N. S. Jarvis and T. Jeske and M. Jing and R. T. Jones and V. Kakoyan and G. Kalicy and V. Khachatryan and C. Kourkoumelis and A. LaDuke and I. Larin and D. Lawrence and D. I. Lersch and H. Li and B. Liu and K. Livingston and G. J. Lolos and L. Lorenti and V. Lyubovitskij and R. Ma and D. Mack and A. Mahmood and H. Marukyan and V. Matveev and M. McCaughan and M. McCracken and C. A. Meyer and R. Miskimen and R. E. Mitchell and K. Mizutani and V. Neelamana and L. Ng and E. Nissen and S. Orešić and A. I. Ostrovidov and Z. Papandreou and C. Paudel and R. Pedroni and L. Pentchev and K. J. Peters and E. Prather and S. Rakshit and J. Reinhold and A. Remington and B. G. Ritchie and J. Ritman and G. Rodriguez and D. Romanov and K. Saldana and C. Salgado and S. Schadmand and A. M. Schertz and K. Scheuer and A. Schick and A. Schmidt and R. A. Schumacher and J. Schwiening and N. Septian and P. Sharp and X. Shen and M. R. Shepherd and J. Sikes and A. Smith and E. S. Smith and D. I. Sober and A. Somov and S. Somov and J. R. Stevens and I. I. Strakovsky and B. Sumner and K. Suresh and V. V. Tarasov and S. Taylor and A. Teymurazyan and A. Thiel and T. Viducic and T. Whitlatch and N. Wickramaarachchi and Y. Wunderlich and B. Yu and J. Zarling and Z. Zhang and X. Zhou and B. Zihlmann},
journal= {arXiv preprint arXiv:2406.12829},
year = {2024}
}