首次测量原子核上当前与目标碎裂区的 Λ 电产生
核实验
2023-04-18 v2 高能物理 - 实验
摘要
我们报道了使用 CLAS 探测器和连续电子束加速器装置 5.014~GeV 电子束在氘、碳、铁和铅靶上的半inclusive深度非弹性散射中 Λ 超子产生的结果。这些结果代表了首次测量 Λ 多重数比值和横动量展宽作为能量分数~() 在当前和目标碎裂区的函数。多重数比值在高~~处表现出强烈抑制,在低~~处表现出增强。所测得的横动量展宽比轻介子的情况大一个数量级。这表明传播实体与核介质发生非常强的相互作用,意味着即使在高~~下,双夸克组态在核介质中的传播也至少部分发生。这些结果的趋势被 Giessen Boltzmann-Uehling-Uhlenbeck 输运模型定性描述,尤其是对于多重数比值。这些观测有望开启核子结构及奇异重子研究的新时代。
引用
@article{arxiv.2210.13691,
title = {First Measurement of $\Lambda$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions},
author = {T. Chetry and L. El Fassi and W. K. Brooks and R. Dupré and A. El Alaoui and K. Hafidi and P. Achenbach and K. P. Adhikari and Z. Akbar and W. R. Armstrong and M. Arratia and H. Atac and H. Avakian and L. Baashen and N. A. Baltzell and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and B. Benkel and F. Benmokhtar and A. Bianconi and A. S. Biselli and M. Bondi and W. A. Booth and F. Bossù and S. Boiarinov and K. -Th. Brinkmann and W. J. Briscoe and D. Bulumulla and V. D. Burkert and D. S. Carman and J. C. Carvajal and A. Celentano and P. Chatagnon and V. Chesnokov and G. Ciullo and P. L. Cole and M. Contalbrigo and G. Costantini and A. D'Angelo and N. Dashyan and R. De Vita and M. Defurne and A. Deur and S. Diehl and C. Djalali and H. Egiyan and L. Elouadrhiri and P. Eugenio and S. Fegan and A. Filippi and G. Gavalian and Y. Ghandilyan and G. P. Gilfoyle and D. I. Glazier and A. A. Golubenko and G. Gosta and R. W. Gothe and K. A. Griffioen and M. Guidal and L. Guo and H. Hakobyan and M. Hattawy and T. B. Hayward and D. Heddle and A. Hobart and M. Holtrop and Y. Ilieva and D. G. Ireland and E. L. Isupov and D. Jenkins and H. S. Jo and M. L. Kabir and A. Khanal and M. Khandaker and A. Kim and W. Kim and F. J. Klein and A. Kripko and V. Kubarovsky and V. Lagerquist and L. Lanza and M. Leali and S. Lee and P. Lenisa and X. Li and K. Livingston and I. J. D. MacGregor and D. Marchand and V. Mascagna and B. McKinnon and C. McLauchlin and Z. E. Meziani and S. Migliorati and T. Mineeva and M. Mirazita and V. Mokeev and C. Munoz Camacho and P. Nadel-Turonski and K. Neupane and S. Niccolai and M. Nicol and G. Niculescu and M. Osipenko and A. I. Ostrovidov and P. Pandey and M. Paolone and L. L. Pappalardo and R. Paremuzyan and E. Pasyuk and S. J. Paul and W. Phelps and N. Pilleux and M. Pokhrel and J. Poudel and J. W. Price and Y. Prok and B. A. Raue and T. Reed and J. Richards and M. Ripani and J. Ritman and G. Rosner and F. Sabatié and C. Salgado and S. Schadmand and A. Schmidt and R. A. Schumacher and Y. G. Sharabian and E. V. Shirokov and U. Shrestha and P. Simmerling and D. Sokhan and N. Sparveris and S. Stepanyan and I. I. Strakovsky and S. Strauch and J. A. Tan and N. Trotta and R. Tyson and M. Ungaro and S. Vallarino and L. Venturelli and H. Voskanyan and E. Voutier and X. Wei and L. B. Weinstein and R. Williams and R. Wishart and M. H. Wood and N. Zachariou and Z. W. Zhao and M. Zurek},
journal= {arXiv preprint arXiv:2210.13691},
year = {2023}
}
备注
14 pages, 6 figures