Searching for Squarks(Springer Theses)

寻找斯夸克:使用阿特拉斯探测器的压缩状态及带有粲夸克喷射的状态

物理学其他学科

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作      者
出  版 社
出版时间
2021年08月28日
装      帧
平装
ISBN
9783030542900
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页      码
223
开      本
9.21 x 6.14 x 0.51
语      种
英文
版      次
2020
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图书简介
This thesis focuses on searches for squarks with the ATLAS detector in ’compressed’ scenarios where the scalar top is very close in mass to the lightest supersymmetric particle. These models are theoretically appealing because the presence of a quasi-degenerate scalar top enhances the self-annihilation cross-section of the lightest supersymmetric particle, acting therefore as a regulator of the dark matter relic density. Two main analyses are presented: the first is a search for scalar tops decaying to charm quarks. The identification of jets originating from the charm quark is very challenging due to its short lifetime. The calibration of tools for charm-tagging has paved the way to measuring the decay of the Higgs boson to pairs of charm quarks. The second analysis presented is the development of a novel technique for reconstructing low momentum b-hadrons. This tool has enabled the ATLAS collaboration to explore topologies that were previously inaccessible.
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