Measurement of the charm fragmentation function in D* photoproduction at HERA
Measurement of the charm fragmentation function in D* photoproduction at HERA
复制标题
HERA D* 摄影制作中魅力碎片函数的测量
DOI：
10.1088/1126-6708/2009/04/082
复制
发表时间：
2009
影响因子：
5.4
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Z. C. S. Chekanov;et al.
利用HERA的ZEUS探测器，在集成光度为120 pb（-1）的情况下，测量了D*光生产中的魅力碎片函数。根据z = （E + p（平行于））(D)* / 2E（射流）测量碎片函数，其中E为D*介子的能量，p（平行于）为D*介子相对于能量E-射流的相关射流轴的纵向动量。射流重构采用k(T)聚类算法，要求射流横向能量大于9GeV。与喷流相关的D*介子需要具有大于2GeV的横向动量。将测量的函数与引入前对数蒙特卡罗模拟和次前阶QCD计算的不同碎片模型进行比较。将每个碎片模型中的自由参数拟合到数据中。将提取的参数和函数本身与e(+)e（-）实验的测量结果进行比较。
The charm fragmentation function has been measured in D* photoproduction with the ZEUS detector at HERA using an integrated luminosity of 120 pb(-1). The fragmentation function is measured versus z = (E + p(parallel to))(D)* / 2E(jet), where E is the energy of the D* meson and p(parallel to) is the longitudinal momentum of the D* meson relative to the axis of the associated jet of energy E-jet. Jets were reconstructed using the k(T) clustering algorithm and required to have transverse energy larger than 9GeV. The D* meson associated with the jet was required to have a transverse momentum larger than 2GeV. The measured function is compared to different fragmentation models incorporated in leading-logarithm Monte Carlo simulations and in a next-to-leading-order QCD calculation. The free parameters in each fragmentation model are fitted to the data. The extracted parameters and the function itself are compared to measurements from e(+)e(-) experiments.
使用 √<s>=318 GeV 的 ep 碰撞中双射流事件中衰变为 μ 子来测量底部光产生
DOI：
--
发表时间：
2004
期刊：
Physical Review D70
影响因子：
--
作者：
ZEUS Collaboration;S.Chekanov et al.
通讯作者：
S.Chekanov et al.