arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.00338physics.ins-dethep-ex
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用于未来对撞机的分段晶体量热器的新观点

New perspectives on segmented crystal calorimeters for future colliders

Marco T. Lucchini, Wonyong Chung, Sarah C. Eno, Yihui Lai, Lorenzo Lucchini, Minh-Thi Nguyen, Christopher G. Tully

摘要:

晶体量热仪在推动高分辨率电磁(EM)量热法的前沿方面有着悠久的历史。在本文中,我们探讨了碰撞检测器性能的主要创新,可以实现与晶体量热法时,纵向分割和双读出能力相结合,一个新的高EM分辨率的方法PFA在多喷流事件,如$e^+e^+\rightarrow HZ$事件在所有强子末态希格斯工厂。我们展示了一种新的技术,预处理$π^0$动量通过组合双光子配对之前,应用喷射算法。该过程显著减少了多射流事件中跨射流的$π^0$光子分裂。正确的光子-喷流分配效率在$3\%/\sqrt{E}$ EM分辨率下提高了3倍。此外,韧致辐射光子恢复技术显着改善电子动量测量。一个高EM分辨率的量热计增加了Z玻色子反冲质量分辨率在Higgstrahlung事件衰变成电子对的80%的μ子对。我们提出了一个高度分段的晶体探测器的概念,实现所需的能量分辨率,时间分辨率优于30 ps提供卓越的粒子识别能力的设计和优化。我们证明,与以前的探测器设计,遭受从一个相互作用长度的晶体在前面的采样强子量能器的大中性强子分辨率退化,双读出晶体上的实施允许实现一个分辨率优于$30\%/\sqrt{E}\oplus 2\%$中性强子。我们的研究发现,将晶体量热法集成到未来的希格斯工厂对撞机探测器中,可以通过在PFA范例中产生最高水平的EM和中性强子分辨率来开辟新的前景。

英文摘要:

Crystal calorimeters have a long history of pushing the frontier on high-resolution electromagnetic (EM) calorimetry. We explore in this paper major innovations in collider detector performance that can be achieved with crystal calorimetry when longitudinal segmentation and dual-readout capabilities are combined with a new high EM resolution approach to PFA in multi-jet events, such as $e^+e^+\rightarrow HZ$ events in all-hadronic final-states at Higgs factories. We demonstrate a new technique for pre-processing $π^0$ momenta through combinatoric di-photon pairing in advance of applying jet algorithms. This procedure significantly reduces $π^0$ photon splitting across jets in multi-jet events. The correct photon-to-jet assignment efficiency improves by a factor of 3 with a $3\%/\sqrt{E}$ EM resolution. In addition, the technique of bremsstrahlung photon recovery significantly improves electron momentum measurements. A high EM resolution calorimeter increases the Z boson recoil mass resolution in Higgstrahlung events for decays into electron pairs to 80% of that for muon pairs. We present the design and optimization of a highly segmented crystal detector concept that achieves the required energy resolution, and a time resolution better than 30 ps providing exceptional particle identification capabilities. We demonstrate that, contrary to previous detector designs that suffered from large neutral hadron resolution degradation from one interaction length of crystals in front of a sampling hadron calorimeter, the implementation of dual-readout on crystals permits to achieve a resolution better than $30\%/\sqrt{E}\oplus 2\%$ for neutral hadrons. Our studies find that the integration of crystal calorimetry into future Higgs factory collider detectors can open new perspectives by yielding the highest level of combined EM and neutral hadron resolution in the PFA paradigm.

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。

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