Search for TeV strings and new phenomena in Bhabha scattering at CERN LEP2
Search for TeV strings and new phenomena in Bhabha scattering at CERN LEP2
复制标题
在 CERN LEP2 寻找 TeV 弦和巴巴散射的新现象
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
D. Bourilkov
中科院分区：
文献类型：
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作者：
D. Bourilkov
结合分析LEP实验ALEPH、L3和OPAL在质心能量为183和189 GeV的Bhabha散射数据，研究TeV弦对大额外维量子引力模型的影响.没有观察到与标准模型预期的统计学显著偏差，并且推导出在95%置信水平下的串尺度MS = 0.631 TeV的下限。这些数据被用来设置下限的接触相互作用的规模从4.2到16.2 TeV取决于模型。在一个补充分析中，我们得出了电子尺寸的上限为2.8 · 10 −19 m，置信水平为95%。
A combined analysis of the data on Bhabha scattering at centre-of-mass energies 183 and 189 GeV from the LEP experiments ALEPH, L3 and OPAL is performed to search for effects of TeV strings in quantum gravity models with large extra dimensions. No statistically significant deviations from the Standard Model expectations are observed and lower limit on the string scale MS = 0.631 TeV at 95 % confidence level is derived. The data are used to set lower limits on the scale of contact interactions ranging from 4.2 to 16.2 TeV depending on the model. In a complementary analysis we derive an upper limit on the electron size of 2.8 · 10 −19 m at 95 % confidence level.