Measuring the weak mixing angle with the P2 experiment at MESA
Measuring the weak mixing angle with the P2 experiment at MESA
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通过 MESA 的 P2 实验测量弱混合角
DOI：
10.3969/j.issn.0253-2778.2016.06.006
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Zimmermann
中科院分区：
文献类型：
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作者：
N. Berger;K. Aulenbacher;S. Baunack;D. Becker;J. Diefenbach;M. Gericke;K. Gerz;Ruth Herbertz;Krishna S. Kumar;F. Maas;M. Molitor;D. Pineiro;I. Sorokin;P. Souder;H. Spiesberger;A. Tyukin;V. Tyukin;M. Zimmermann
美因茨的P2实验旨在测量电子-质子散射中的弱混合角SiN-2�W，精度为0.13%。为了抑制由于质子结构和盒图贡献引起的不确定性，选择了平均动量转移q2为4.5·10−3GeV2/c2和束流能量为15 5 MeV的低能束流。为了收集这项测量所需的大量统计数据，正在建造新的美因茨能量回收超导加速器(MESA)。这些会议描述了测量的动机、实验和加速器挑战以及我们计划如何应对这些挑战。
The P2 experiment in Mainz aims to measure the weak mixing angle sin 2 �W in electron- proton scattering to a precision of 0.13%. In order to suppress uncertainties due to proton structure and contributions from box graphs, both a low average momentum transfer Q 2 of 4.5·10 −3 GeV 2 /c 2 and a low beam energy of 155 MeV are chosen. In order to collect the enormous statistics required for this measurement, the new Mainz Energy Recovery Superconducting Accelerator (MESA) is being constructed. These proceedings describe the motivation for the measurement, the experimental and accelerator challenges and how we plan to tackle them.