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arXiv 0811.0846hep-ph
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包含奇异夸克贡献的LHC带电双轻子对产生

Charged Bilepton Pair Production at LHC Including Exotic Quark Contribution

E. Ramirez Barreto, Y. A. Coutinho, J. Sá Borges

摘要:

在电弱标准模型(SM)框架下,一些作者计算了强子对撞机中$W^+ W^-$对的产生。在树的水平上,通过考虑新的中性规范玻色子和奇异费米子的贡献,计算了SM的一些扩展模型,如矢量单线态模型、费米子镜像费米子模型和矢量二重态模型的产生.对$e^+ e^-$和$pp$碰撞的计算结果表明,新的物理贡献是相当重要的.这促使我们计算由${SU (3)_C \times SU (3)_L \times U (1)_X}$模型(3-3-1模型)预测的更大质量的带电规范玻色子的产生。因此,本论文的目的是分析所发挥的作用的额外规范玻色子${Z^\prime}$和奇异夸克,预测在最小版本的3-3-1模型,通过考虑包括生产的一对双轻子($V^\pm$)的反应$p + p \longrightarrow V^+ + V^- + X$,在大型强子对撞机(LHC)的能量。我们的结果表明,正确的能量行为的基本截面遵循的平衡的额外的中性规范玻色子的贡献与那些从奇异夸克。额外的中性规范玻色子在树的水平上诱导变味中性流(FCNC),我们已经引入了普通夸克混合矩阵的模型时,第一家庭的转换不同的其他两个相对于$SU(3)_L$。我们得到了大量的重双轻子对产生的两个不同值的质心能量的大型强子对撞机。

英文摘要:

The production of $W^+ W^-$ pair in hadron colliders was calculated up to loop corrections by some authors in the Electroweak standard model (SM) framework. This production was also calculated, at the tree level, in some extensions of the SM such as the vector singlet, the fermion mirror fermion and the vector doublet models by considering the contributions of new neutral gauge bosons and exotic fermions. The obtained results for $e^+ e^-$ and $pp$ collisions pointed out that the new physics contributions are quite important. This motivates us to calculate the production of a more massive charged gauge boson predicted by the ${SU (3)_C \times SU (3)_L \times U (1)_X}$ model (3-3-1 model). Thus, the aim of the present paper is to analyze the role played by of the extra gauge boson ${Z^\prime}$ and of the exotic quarks, predicted in the minimal version of the 3-3-1 model, by considering the inclusive production of a pair of bileptons ($V^\pm$) in the reaction $p + p \longrightarrow V^+ + V^- + X$, at the Large Hadron Collider (LHC) energies. Our results show that the correct energy behavior of the elementary cross section follows from the balance between the contributions of the extra neutral gauge boson with those from the exotic quarks. The extra neutral gauge boson induces flavor-changing neutral currents (FCNC) at tree level, and we have introduced the ordinary quark mixing matrices for the model when the first family transforms differently to the other two with respect to $SU(3)_L$. We obtain a huge number of heavy bilepton pairs produced for two different values of the center of mass energy of the LHC.

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。

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