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arXiv 1407.6583hep-ex
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在$\sqrt{s}$ = 8 $TeV$的PDMATHAAD碰撞数据中用ATLAS探测器寻找$65-600$ GeV质量范围内的标量双光子共振

Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$

ATLAS Collaboration

摘要:

利用大型强子对撞机ATLAS探测器收集的$\sqrt{s}$ = 8 TeV $pp$的20.3 fb $^{-1}$碰撞数据,对质量范围为$65-600$ GeV的标量粒子通过窄共振衰变为两个光子进行了搜索.最近发现的希格斯玻色子被视为背景。未观察到其他信号的显著证据。结果被呈现为在95%置信水平上的标量玻色子乘以分支比到两个光子的产生横截面上的限制,在基准体积中,重建效率近似独立于事件拓扑。设定的上限比以前的搜索范围大得多。

英文摘要:

A search for scalar particles decaying via narrow resonances into two photons in the mass range $65-600$ GeV is performed using 20.3 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV $pp$ collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as limits at the 95 % confidence level on the production cross-section of a scalar boson times branching ratio into two photons, in a fiducial volume where the reconstruction efficiency is approximately independent of the event topology. The upper limits set extend over a considerably wider mass range than previous searches.

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