arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1007.4984hep-phastro-ph.HEhep-ex
收藏

GeV-Scale e+ e对撞机上的辐射事件作为暗力的探测

Radiative Events as a Probe of Dark Forces at GeV-Scale e+ e- Colliders

L. Barze', G. Balossini, C. Bignamini, C. M. Carloni Calame, G. Montagna, O. Nicrosini, F. Piccinini

摘要:

GeV级的高亮度e+ e对撞机(香料工厂)最近被认为是一个理想的环境,以寻找一个轻弱耦合矢量玻色子U(暗光子)出现在几个新的物理模型,能够解释异常天体物理观测的暗物质。在香料工厂,一个特别干净的通道是与光子结合的U玻色子的产生,然后U玻色子衰变为轻子对。除了在以前的作品中解决的近似,我们重新审视这个通道的达到潜力,通过执行一个精确的最低阶计算的信号和背景过程。我们还包括迄今为止被忽略的初态和末态QED修正的影响,以显示它们如何影响实验感兴趣的分布。我们提出了在KLOE/KLOE-2和未来的超级B工厂的暗光子信号的预期统计意义的新结果。该计算在新版本的事件生成器BabaYaga@NLO中实现,可用于完整的事件模拟和数据分析。

英文摘要:

High-luminosity e+ e- colliders at the GeV scale (flavor factories) have been recently recognized to be an ideal environment to search for a light weakly coupled vector boson U (dark photon) emerging in several new physics models able to interpret anomalous astrophysical observations in terms of dark matter. At flavor factories a particularly clean channel is the production of the U boson in association with a photon, followed by the decay of the U boson into lepton pairs. Beyond the approximations addressed in previous works, we revisit the reach potential of this channel by performing an exact lowest-order calculation of the signal and background processes. We also include the effect of initial and final state QED corrections neglected so far, to show how they affect the distributions of experimental interest. We present new results for the expected statistical significance to a dark photon signal at KLOE/KLOE-2 and future super-B factories. The calculation is implemented in a new release of the event generator BabaYaga@NLO, which is available for full event simulations and data analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑