论文标题
TEV $ E^+E^ - $具有有效现场理论的colliders的双Higgs生产：对BSM Higgs耦合的敏感性
Double Higgs production at TeV $e^+e^-$ colliders with Effective Field Theories: sensitivity to BSM Higgs couplings
论文作者
论文摘要
在这项工作中，我们研究了在有效的野外理论（EFT）的背景下，在TEV域，CLIC和ILC的两个计划的电子正电子山脉（EFT）中生产两个Higgs玻色子，以超越标准模型HIGGS HIGGS物理学。我们首先关注Higgs有效田间理论（HEFT）的情况，接下来我们将其与标准模型有效场理论（SMEFT）的情况进行比较。首先，针对参与我们感兴趣的总过程的最相关的子进程的双HIGGS生产的预测，$ e^+e^ - \ tohhν\ barbν$，这是两个量表玻色子的散射，$ ww \ to hh $，也称为$ ww $ fusion $ WW $ fusion。对于两个EFT，对横截面$σ（W_x W_Y \ to HH）$的预测均已完整详细分析，用于两个EFT，对于所有具有纵向和横向模式的极化通道$ xy = ll，tt，tt，tt，lt，tl $，以及两种情况下最相关的有效运营者。我们将证明，在有限的情况下，可以从$ ll $贡献方面完全理解横截面的总横截面，而这反过来又可以在这些TEV Energies中占主导地位。通过在子过程的散射幅度级别上进行两个EFT之间的匹配，我们将能够在重量和SMEFT中找到前导系数的对应关系。在这项工作的最后一部分中，我们将在CLIC（3 TEV，5 AB $^{ - 1} $）和ILC（1 TEV，8 AB $^{ - 1} $）上探索对这两个最相关的重量系数的敏感性。然后，我们将通过研究这两个$ e^+e^ - $ collider的预测速率的最终状态$ b \ b b b b b b b b b b b b b b b b b b b b b b b b b b bν$在这两个参数的可访问区域中得出结论。
In this work we study the production of two Higgs bosons at the two planned electron positron colliders with energies at the TeV domain, CLIC and ILC, within the context of Effective Field Theories (EFTs) to describe beyond the Standard Model Higgs Physics. We focus first on the case of the Higgs Effective Field Theory (HEFT) and next we compare with the case of the Standard Model Effective Field Theory (SMEFT). The predictions for double Higgs production in both EFTs are first presented for the most relevant subprocess participating in the total process of our interest, $e^+e^- \to HH ν\bar ν$, which is the scattering of two gauge bosons, $WW \to HH$, also called $WW$ fusion. The predictions for the cross section $ σ(W_X W_Y\to HH)$ as a function of the subprocess energy are analyzed in full detail for the two EFTs, for all the polarization channels with longitudinal and transverse modes $XY=LL, TT,LT,TL$, and for the most relevant effective operators in both cases. We will demonstrate that in the HEFT case, the total cross section can be fully understood in terms of the $LL$ contribution and this in turn is dominated at these TeV energies mainly by two HEFT coefficients. By doing the matching between the two EFTs at the level of the scattering amplitude for the subprocess, we will be able to find the correspondence of the leading coefficients in the HEFT and the SMEFT. In the final part of this work we will then explore the sensitivity to these two most relevant HEFT coefficients, at CLIC (3 TeV, 5 ab$^{-1}$) and ILC (1 TeV, 8 ab$^{-1}$). We will then conclude on the accessible region of these two parameters by studying the predicted rates at these two $e^+e^-$ colliders for the final state $b \bar b b \bar b ν\bar ν$ leading to characteristic signals with 4 bottom jets and missing energy.
