Measurement and QCD analysis of neutral and charged current cross sections at HERA
Measurement and QCD analysis of neutral and charged current cross sections at HERA
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DOI：
10.1140/epjc/s2003-01257-6
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发表时间：
2003-09-01
影响因子：
4.4
通讯作者：
zur Nedden, M
中科院分区：
文献类型：
--
作者：
Adloff, C;Andreev, V;zur Nedden, M
用HERA的H1探测器测量了中性电流和带电电流过程的包括e(+)p的单和双微分截面。数据采集于1999年和2000年，质量中心能量为根= 319 GeV，对应的综合光度为65.2 pb（-1）。横截面的测量范围为四动量传递平方Q(2)在100 ~ 30000 GeV2之间，比约肯x在0.0013 ~ 0.65之间。对新的e(+)p数据和1998年和1999年早期的e(+)p数据的中性电流分析扩展到散射电子的小能量，从而扩展到更高的非弹性y值，从而可以确定高Q(2) （110 - 700 GeV2）时的纵向结构函数F-L。利用新的e(+)p和以前发表的e(+)p中性电流在高Q(2)处的截面数据，获得了波浪(3)上结构函数x (F)的新测量值。这些数据与H1低Q(2)精度数据一起进一步用于在标准模型框架内执行新的次领先阶QCD分析，以提取质子中的风味分离部分分布。
The inclusive e(+)p single and double differential cross sections for neutral and charged current processes axe measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a centre-of-mass energy of roots = 319 GeV and correspond to an integrated luminosity of 65.2 pb(-1). The cross sections are measured in the range of four-momentum transfer squared Q(2) between 100 and 30 000 GeV2 and Bjorken x between 0.0013 and 0.65. The neutral current analysis for the new e(+)p data and the earlier e-p data taken in 1998 and 1999 is extended to small energies of the scattered electron and therefore to higher values of inelasticity y, allowing a determination of the longitudinal structure function F-L at high Q(2) (110 - 700 GeV2). A new measurement of the structure function x (F) over tilde (3) is obtained using the new e(+)p and previously published e p neutral current cross section data at high Q(2). These data together with H1 low Q(2) precision data are further used to perform new next-to-leading order QCD analyses in the framework of the Standard Model to extract flavour separated parton distributions in the proton.