文章基本信息

标题：High Q2 neutral and charged current in polarised collisions at HERA II with H1
本地全文：下载
作者：S. HABIB
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2011
卷号：2011
期号：EPS-HEP2011
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Preliminary results from longitudinally polarized electron† collisions with unpolarized protons are presented. The measurements correspond to negative four momentum transfer squared Q2 & 100 GeV2 and are based on the complete HERA-II data set taken by the H1 Detector — 330 pb−1 of data at the centre of mass energy of √s = 318 GeV. Measurements demonstrating the parity violating nature of the electroweak force are presented for both neutral current and charged current interactions and are found to be in good agreement with Standard Model predictions. The polarized data sets are combined in order to extract the unpolarized cross section. The resulting single differential ds /dQ2 and double differential reduced cross sections s˜ (in Bjorken-x and Q2) are compared to SM expectations for which there is good agreement. The HERA-II unpolarized cross section is combined with its previously published H1 HERA-I measurement to give the HERA-I+II result which has improved statistical as well as systematic precision. The HERA-I+II NC cross sections are used to derive the valence sensitive xFgZ 3 structure function.