70 GeV pA 相互作用中近阈粲产生
核实验
2017-03-17 v1
摘要
本文展示了在 U-70 加速器（IHEP, Protvino）上进行的 SERP-E-184 实验的结果。通过研究 70 GeV 质子束与 C、Si 和 Pb 靶的相互作用，探测了粲 、、、 介子和 重子在其产生阈值附近的衰变。寿命和质量的测量结果显示与 PDG 数据良好吻合。获得了粲产生的包容截面及其 A 依赖性。将这些粒子的产额与理论预测及其他实验数据进行了比较。在质心碰撞能量 = 11.8 GeV 下，测得的总开粲产生截面（ = 7.1 2.3(stat) 1.4(syst) b/nucleon）远高于 QCD 模型预测。在质子-核相互作用中，不同种类的粲粒子对总开粲产生截面的贡献随能量变化。
引用
@article{arxiv.1703.05639,
title = {Charm production nearby threshold in pA-interactions at 70 GeV},
author = {A. Afonin and E. Ardashev and V. Balandin and G. Bogdanova and M. Bogolyubsky and O. Gavrishchuk and S. Golovnia and S. Gorokhov and V. Golovkin and D. Karmanov and A. Kiryakov and E. Kokoulina and V. Kramarenko and A. Leflat and Yu. Petukhov and A. Pleskach and V. Popov and V. Riadovikov and V. Ronjin and I. Rufanov and Yu. Tsyupa and V. Volkov and A. Vorobiev and A. Voronin and A. Yukaev and V. Zapolsk and E. Zverev},
journal= {arXiv preprint arXiv:1703.05639},
year = {2017}
}
备注
4 pages, 6 pages, 38th International Conference on High Energy Physics 3-10 August 2016, Chicago, USA