| 报告题目： |
Electroweak splitting functions & shower |
| 报告人： |
Dr.谌俊谋 |
| 报告人单位： |
韩国高等研究院(KIAS) |
| 报告时间： |
2018年5月29日上午 9：00 -9:45 |
| 报告地点： |
东七楼，四楼427会议室 |
| 邀请单位： |
粒子与天体物理研究所 |
| 报告摘要： |
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报告人简介：
2017- 博士后， 韩国 KIAS
2012-2017 博士， 匹兹堡大学， 美国
2009-2012 硕士， 南开大学
2004-2008 本科， 吉林大学 |
| 报告人简介： |
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We derive the electroweak (EW) collinear splitting functions up to single logs. We first derive the splitting functions in the unbroken limit, and then we systematically incorporate effects of EW symmetry breaking (EWSB), by imposing a particularly convenient gauge choice (dubbed “Goldstone Equivalence Gauge”) that disentangles the effects of Goldstone bosons and gauge fields in the presence of EWSB. As a result, we are able to derive splitting functions up to leading power corrections in v/k_T. We also implement a comprehensive, practical EW showering scheme based on these splitting functions using a Sudakov evolution formalism. The implementation of EW showering includes novel features such as ``ultra-collinear" splittings, matching between shower and decay, and mixed-state evolution of neutral bosons (γ/Z/h) using density-matrices, kinematic back-reaction corrections in multi-stage showers. We demonstrate those new phenomena and features at O(1–10 TeV) energies with some examples. |
