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arXiv 1006.2491hep-exhep-ph
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在ALEPH的Higgs到4 Taus

Higgs to Four Taus at ALEPH

James Beacham

备注：
To appear in the proceedings of the 45th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Valle d'Aosta, Italy, 13-20 Mar 2010. 4 pages, 1 figure
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摘要：

对大电子正电子对撞机ALEPH探测器收集的683 pb $^{-1}$数据进行了搜索，质心能量从183到209 $\mathrm{GeV}$，寻找通过中间赝标量$a$粒子衰变为四个$τ$轻子的希格斯玻色子，对于70至114 $\mathrm{GeV} / c^2$的希格斯质量范围和4至12 $\mathrm{GeV} / c^2$的$a$质量范围。未观察到超过背景的过量，并在$m_h, m_a$平面中对$ξ^2 = \frac{σ(e^+ e^-\ra Z+h)}{σ_{SM}(e^+ e^-\ra Z+h)}\times(h\ra aa)\times(a\ra τ^+τ^-)^2$进行限制。对于$m_h < 107 \; \mathrm{GeV} / c^2$和$m_a < 10 \; \mathrm{GeV} / c^2$，$ξ^2 > 1$可在95\%置信水平下排除。

英文摘要：

A search has been performed on 683 pb$^{-1}$ of data collected by the ALEPH detector at the Large Electron-Positron (LEP), collider at centre-of-mass energies from 183 to 209 $\mathrm{GeV}$ looking for a Higgs boson decaying into four $τ$ leptons via intermediate pseudoscalar $a$ particles, for a Higgs mass range of 70 to 114 $\mathrm{GeV} / c^2$ and an $a$ mass range of 4 to 12 $\mathrm{GeV} / c^2$. No excess above background is seen and a limit is placed on $ξ^2 = \frac{σ(e^+ e^-\ra Z+h)}{σ_{SM}(e^+ e^-\ra Z+h)}\times(h\ra aa)\times(a\ra τ^+τ^-)^2$ in the $m_h, m_a$ plane. For $m_h < 107 \; \mathrm{GeV} / c^2$ and $m_a < 10 \; \mathrm{GeV} / c^2$, $ξ^2 > 1$ can be excluded at the 95\% confidence level.

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