Probing R-parity violating interactions from top-quark polarization at LHC
Probing R-parity violating interactions from top-quark polarization at LHC
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DOI：
10.1140/epjc/s10052-007-0290-y
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发表时间：
2006-08
期刊：
影响因子：
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通讯作者：
Peiying Li;G. Lu;Jin Min Yang;Huanjun Zhang
中科院分区：
文献类型：
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作者：
Peiying Li;G. Lu;Jin Min Yang;Huanjun Zhang
在最小超对称标准模型中，违反 R 宇称的相互作用可以通过 t 通道过程 dRd̄R→tLt̄L（通过交换沉子）或通过 u 通道过程 dRd̄R→tRt̄Re 交换夸克，在大型强子对撞机上引起异常顶对产生。这种具有一定手性的顶对产物会导致顶对事件中的顶夸克极化。我们发现，在大型强子对撞机上，由于统计量大，可观测到的偏振的统计显着性，以及相应的 R 宇称破缺耦合的探测能力，比 Tevatron 升级时要高得多。
In the minimal supersymmetric standard model the R-parity violating interactions can induce anomalous top pair productions at the LHC through the t-channel process dRd̄R→tLt̄Lby exchanging a slepton or by the u-channel process dRd̄R→tRt̄Rexchanging a squark. Such top pair productions with a certain chirality cause top-quark polarization in the top pair events. We found that at the LHC, due to the large statistics, the statistical significance of the polarization observable, and thus the probing ability for the corresponding R-parity violating couplings, is much higher than at the Tevatron upgrade.