Muti-jet cross sections in charged current e{sup plus_minus}p scattering at HERA.
Muti-jet cross sections in charged current e{sup plus_minus}p scattering at HERA.
复制标题
HERA 处带电电流 e{sup plus_minus}p 散射的多射流横截面。
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
E. al.
中科院分区：
文献类型：
--
作者：
Z. C. S. Chekanov;E. al.
在HERA II的ZEUS探测器上，使用0.36 fb{sup-1}的积分光度，在高玻色子虚拟度Q{sup 2}下，在带电电流深度非弹性e{sup {+-}}p散射中测量射流截面。微分截面的包含射流生产的功能Q{sup 2}，Bjorken x和射流横向能量和赝快度。给出了双喷流不变质量截面。首次报道了在荷电e{sup {+-}}p过程中观测到的三喷流和四喷流事件。的预测下一个领先阶（NLO）QCD计算进行比较的测量。所测得的包含射流截面的形状和归一化的NLO预测很好地描述。数据有可能约束质子中的u和d价夸克分布，如果包括作为输入到全球拟合。
Jet cross sections were measured in charged-current deep inelastic e{sup {+-}}p scattering at high boson virtualities Q{sup 2} with the ZEUS detector at HERA II using an integrated luminosity of 0.36 fb{sup -1}. Differential cross sections are presented for inclusive-jet production as functions of Q{sup 2}, Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e{sup {+-}}p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The measured inclusive-jet cross sections are well described in shape and normalization by the NLO predictions. The data have the potential to constrain the u and d valence-quark distributions in the proton if included as input to global fits.