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arXiv 1107.4087hep-ph
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在四位无希格斯粒子模型中LHC的W'产生

W' production at the LHC in the 4-site Higgsless model

Elena Accomando, Diego Becciolini, Stefania De Curtis, Daniele Dominici, Luca Fedeli

摘要:

我们在现有的对撞机上研究了基于$SU(2)_L\times SU(2)_1\times SU(2)_2\times U(1)_Y$规范对称性的四格点无Higgs模型的唯象。该模型预言存在两个中性和四个带电的额外规范玻色子Z1,Z2,W1,W2。在本文中,我们专注于收费的规范部门。我们首先从Tevatron的直接搜索中得到W1,W2玻色子质量和SM费米子耦合的限制。然后,我们估计在7 TeV的LHC的排除限制与实际L=1 fb-1和发现的潜力与预期的L=10 fb-1。相对于最小(或3-位)希格斯无模型,它预测了几乎是疏费米的额外规范玻色子,次最小(或4-位)希格斯无模型恢复了相当大的W1,W2玻色子耦合到普通物质,表达了非疏费米的多维多共振理论的内在本质。由于这一特点,我们发现,从现在起的一年,新的重规范玻色子,W1和W2,可以发现在7 TeV LHC的电子和大的失踪横向能量的最终状态,在TeV区域的W1,W2玻色子质量,取决于模型参数。

英文摘要:

We study the phenomenology of the 4-site Higgsless model, based on the $SU(2)_L\times SU(2)_1\times SU(2)_2\times U(1)_Y$ gauge symmetry, at present colliders. The model predicts the existence of two neutral and four charged extra gauge bosons, Z1,Z2,W1,W2. In this paper, we focus on the charged gauge sector. We first derive limits on W1,W2-boson masses and couplings to SM fermions from direct searches at the Tevatron. We then estimate at the 7 TeV LHC the exclusion limits with the actual L=1 fb-1 and the discovery potential with the expected L=10 fb-1. In contrast to the minimal (or 3-site) Higgsless model which predicts almost fermiophobic extra gauge bosons, the next-to-minimal (or 4-site) Higgsless model recovers sizeable W1,W2-boson couplings to ordinary matter, expressing the non-fermiophobic multiresonance inner nature of extra-dimensional theories. Owing to this feature, we find that in one year from now the new heavy gauge bosons, W1 and W2, could be discovered in the final state with an electron and large missing transverse energy at the 7 TeV LHC for W1,W2-boson masses in the TeV region, depending on model parameters.

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