论文标题
探测LHC和未来强子壁的中性三重量规耦合
Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders
论文作者
论文摘要
我们研究了LHC和拟议的100TEV $ PP $ colliders中性三重量规耦合（NTGC）的探针，并将其灵敏度与拟议的$ E^+ E^ - $ colliders的敏感性达到。 NTGC为超出标准模型（SM）以外的新物理学提供了一个独特的窗口，因为它们可以由SM有效的场理论（SMEFT）操作员构成，该操作员尊重全部electroweak量规组$ su（2）_l \ otimes u（1）_y $的SM仅在dimension-8或更高的级别上。我们在破碎的相中得出由这些尺寸-8运算符生成的中性三重量规顶点（NTGVS），并将它们映射到新的概括型颜料公式中，该配方公式仅考虑了残差u（1）$ _ {\ rm {em}}} $ gauge Symmetry。使用此映射，我们在保证NTGV的真正一致的外形式配方的形式之间得出了新的关系，并消除了大型非物理能量依赖性项。然后，我们分析了LHC和未来100TEV HADRON的敏感性，以通过尺寸-8 NTGC运算符和相应的NTGC形式在反应$ pp（q \ bar {q}）\ tozγ$ t tozγ$中，用$ z \ to $ z \ to \ ell^el^el^+ell^el^bar NTGC探测NTGC。我们将它们的敏感性与NTGC的现有LHC测量以及高能量$ e^+e^ - $ colliders进行了比较。 In general, we find that the prospective LHC sensitivities are comparable to those of an $e^+ e^-$ collider with center-of-mass energy $\leq 1$TeV, whereas an $e^+ e^-$ collider with center-of-mass energy $(3 - 5)$TeV would have greater sensitivities, and a 100TeV $pp$ collider could provide the most sensitive probes of the nTGCs.
We study probes of neutral triple gauge couplings (nTGCs) at the LHC and the proposed 100TeV $pp$ colliders, and compare their sensitivity reaches with those of the proposed $e^+ e^-$ colliders. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $SU(2)_L\otimes U(1)_Y$ of the SM only at the level of dimension-8 or higher. We derive the neutral triple gauge vertices (nTGVs) generated by these dimension-8 operators in the broken phase and map them onto a newly generalized form factor formulation, which takes into account only the residual U(1)$_{\rm{em}}$ gauge symmetry. Using this mapping, we derive new relations between the form factors that guarantee a truly consistent form factor formulation of the nTGVs and remove large unphysical energy-dependent terms. We then analyze the sensitivity reaches of the LHC and future 100TeV hadron colliders for probing the nTGCs via both the dimension-8 nTGC operators and the corresponding nTGC form factors in the reactions $ pp(q\bar{q})\to Zγ$ with $Z\to\ell^+\ell^-,ν\barν$. We compare their sensitivities with the existing LHC measurements of nTGCs and with those of the high-energy $e^+e^-$ colliders. In general, we find that the prospective LHC sensitivities are comparable to those of an $e^+ e^-$ collider with center-of-mass energy $\leq 1$TeV, whereas an $e^+ e^-$ collider with center-of-mass energy $(3 - 5)$TeV would have greater sensitivities, and a 100TeV $pp$ collider could provide the most sensitive probes of the nTGCs.
