arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.1487hep-ex
收藏

寻找sqrt(s)=7 TeV pp碰撞中衰变为双光子的标准模型希格斯玻色子

Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV

CMS Collaboration

摘要:

描述了一种寻找衰变为两个光子的希格斯玻色子的方法。使用CMS实验记录的数据集进行分析,在LHC从pp碰撞在质心能量为7 TeV,这对应于一个积分亮度为4.8个反femtobarns。在标准模型希格斯玻色子衰变为两个光子的截面上设定了限制。在95%置信水平下,预期的排除极限在110和150 GeV之间的质量范围内为标准模型截面的1.4和2.4倍之间。在95%的置信水平下,数据分析排除了标准模型希格斯玻色子在128至132 GeV的质量范围内衰变为两个光子。超过预期的标准模型背景的事件最大的过剩观察到的希格斯玻色子质量假设为124 GeV的本地意义为3.1西格玛。在搜索范围110-150 GeV的任何地方观察到局部显著性大于3.1 sigma的过量的全局显著性估计为1.8 sigma。需要更多的数据来确定这一过剩的根源。

英文摘要:

A search for a Higgs boson decaying into two photons is described. The analysis is performed using a dataset recorded by the CMS experiment at the LHC from pp collisions at a centre-of-mass energy of 7 TeV, which corresponds to an integrated luminosity of 4.8 inverse femtobarns. Limits are set on the cross section of the standard model Higgs boson decaying to two photons. The expected exclusion limit at 95% confidence level is between 1.4 and 2.4 times the standard model cross section in the mass range between 110 and 150 GeV. The analysis of the data excludes, at 95% confidence level, the standard model Higgs boson decaying into two photons in the mass range 128 to 132 GeV. The largest excess of events above the expected standard model background is observed for a Higgs boson mass hypothesis of 124 GeV with a local significance of 3.1 sigma. The global significance of observing an excess with a local significance greater than 3.1 sigma anywhere in the search range 110-150 GeV is estimated to be 1.8 sigma. More data are required to ascertain the origin of this excess.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑