Double Higgs boson production and Higgs self-coupling extraction at CLIC
Double Higgs boson production and Higgs self-coupling extraction at CLIC
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DOI：
10.1140/epjc/s10052-020-08567-7
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
P. Roloff;U. Schnoor;R. Simoniello;Boruo Xu
中科院分区：
文献类型：
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作者：
P. Roloff;U. Schnoor;R. Simoniello;Boruo Xu
紧凑型直线对撞机（CLIC）是未来的电子-正电子对撞机，将允许测量三线性希格斯自耦合在双希格斯玻色子事件产生的高能阶段的碰撞能量从= 1.4到3 TeV。对Higgs自耦合的灵敏度是由W玻色子融合过程中Higgs玻色子对的截面和不变质量分布的测量所驱动的。它是通过包括在1.4 TeV的ZHH生产的横截面测量增强。利用全探测器模拟，研究了衰变通道下CLIC对W玻色子聚变产生Higgs对的预期灵敏度，包括积分光度= 2.5 ab的= 1.4 TeV和积分光度= 5 ab的= 3 TeV的所有相关背景。结合1.4TeV和ZHH截面测量以及3 TeV事件中的差分测量，CLIC将能够测量三线性Higgs自耦合，相对不确定度为和68% C.L.，假设标准模型。此外，三线性Higgs自耦合和Higgs-规范耦合HHWW的同时约束的前景是根据测量导出的。
The Compact Linear Collider (CLIC) is a future electron–positron collider that will allow measurements of the trilinear Higgs self-coupling in double Higgs boson events produced at its high-energy stages with collision energies from= 1.4 to 3 TeV. The sensitivity to the Higgs self-coupling is driven by the measurements of the cross section and the invariant mass distribution of the Higgs-boson pair in the W-boson fusion process,. It is enhanced by including the cross-section measurement of ZHH production at 1.4 TeV. The expected sensitivity of CLIC for Higgs pair production through W-boson fusion is studied for the decay channelsandusing full detector simulation including all relevant backgrounds at= 1.4 TeV with an integrated luminosity of= 2.5 aband at= 3 TeV with= 5 ab. Combiningand ZHH cross-section measurements at 1.4 TeV with differential measurements inevents at 3 TeV, CLIC will be able to measure the trilinear Higgs self-coupling with a relative uncertainty ofandat 68% C.L., assuming the Standard Model. In addition, prospects for simultaneous constraints on the trilinear Higgs self-coupling and the Higgs-gauge coupling HHWW are derived based on themeasurement.