3.5 GeV p+p 碰撞中的包容性双电子谱
核实验
2015-06-03 v1
摘要
我们给出了在 3.5 GeV 束流动能下 p+p 相互作用中双电子（ee 对）的包容性不变质量、横向动量和快度分布。在矢量介子质量区，以 2% 的质量分辨率重建了对应于直接 衰变的一个明显峰。将数据与三种模型计算的预测进行了比较。由于 HADES 装置对 不变质量大于 0.2 GeV/ 且横向对动量 p 1 GeV/ 具有大接受度，接受度修正在很大程度上是模型无关的。这使我们能够首次在此能量下从双电子数据中提取轻矢量介子的包容性产生截面。还报告了 和 介子的包容性产生截面。所得结果将作为研究质子-核与重离子碰撞中矢量介子产生的重要参考。此外，利用该数据，获得了直接 衰变为正负电子道分支比上限的改进值。
引用
@article{arxiv.1112.3607,
title = {Inclusive dielectron spectra in p+p collisions at 3.5 GeV},
author = {G. Agakishiev and A. Balanda and D. Belver and A. Belyaev and A. Blanco and M. Böhmer and J. L. Boyard and P. Cabanelas and E. Castro and J. C. Chen and S. Chernenko and T. Christ and M. Destefanis and F. Dohrmann and A. Dybczak and E. Epple and L. Fabbietti and O. Fateev and P. Finocchiaro and P. Fonte and J. Friese and I. Fröhlich and T. Galatyuk and J. A. Garzón and R. Gernhäuser and C. Gilardi and M. Golubeva and D. González-Díaz and F. Guber and M. Gumberidze and T. Heinz and T. Hennino and R. Holzmann and I. Iori and A. Ivashkin and M. Jurkovic and B. Kämpfer and K. Kanaki and T. Karavicheva and I. Koenig and W. Koenig and B. W. Kolb and R. Kotte and A. Krása and F. Krizek and R. Krücken and H. Kuc and W. Kühn and A. Kugler and A. Kurepin and R. Lalik and S. Lang and J. S. Lange and K. Lapidus and T. Liu and L. Lopes and M. Lorenz and L. Maier and A. Mangiarotti and J. Markert and V. Metag and B. Michalska and J. Michel and E. Morinière and J. Mousa and C. Müntz and L. Naumann and J. Otwinowski and Y. C. Pachmayer and M. Palka and Y. Parpottas and V. Pechenov and O. Pechenova and J. Pietraszko and W. Przygoda and B. Ramstein and A. Reshetin and A. Rustamov and A. Sadovsky and P. Salabura and A. Schmah and E. Schwab and J. Siebenson and Yu. G. Sobolev and S. Spataro and B. Spruck and H. Ströbele and J. Stroth and C. Sturm and A. Tarantola and K. Teilab and P. Tlusty and M. Traxler and R. Trebacz and H. Tsertos and V. Wagner and M. Weber and C. Wendisch and J. Wüstenfeld and S. Yurevich and Y. Zanevsky},
journal= {arXiv preprint arXiv:1112.3607},
year = {2015}
}