$WWZ/\gamma$ production in large extra dimensions model at LHC and ILC
$WWZ/\gamma$ production in large extra dimensions model at LHC and ILC
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DOI：
10.1103/physrevd.86.095008
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发表时间：
2012-09
影响因子：
5
通讯作者：
Xiao-Zhou Li;Peng-Fei Duan;Wen-gan Ma;Ren-You Zhang;Guo Lei
中科院分区：
文献类型：
--
作者：
Xiao-Zhou Li;Peng-Fei Duan;Wen-gan Ma;Ren-You Zhang;Guo Lei
本文研究了在欧洲核子研究中心（CERN）大型强子对撞机（LHC）和国际直线对撞机（ILC）的大额外维（LED）模型框架下，Kaluza-Klein（KK）引力子对$W^+W^-\gamma/Z$产生的影响.给出了LED模型的积分截面和各种运动学分布，并与标准模型进行了比较。结果表明，在ILC和LHC中，KK-引力子交换的贡献对三重规范玻色子（$W^+W^-\gamma/Z$）产生过程的观测值有显著影响，特别是在高横动量区和中心快度区.我们还发现LHC上$W^+W^-\gamma/Z$产生的相对LED差异一般大于ILC上的，这是由于$gg$聚变子过程的额外LED贡献和$pp$碰撞中连续大碰撞能量引起的KK-引力子交换共振效应造成的。我们得出结论：在测量$W ^{+}W^{-}\gamma$和$W^{+}W^{-}Z$产生时，LHC在有效探测LED信号方面比ILC具有明显的优势。
We investigate the effect induced by the Kaluza-Klein (KK) graviton in the $W^+W^-\gamma/Z$ production in the framework of the large extra dimensions (LED) model at both the CERN Large Hadron Collider (LHC) and the International Linear Collider (ILC). The integrated cross sections and various kinematic distributions in the LED model are presented and compared with those in the standard model. The results show that the contributions from KK-graviton exchange remarkably affect the observables of the triple gauge boson ($W^+W^-\gamma/Z$) production processes at both the ILC and the LHC, particularly either in the high transverse momentum region or in the central rapidity region. We also find that the relative LED discrepancy for the $W^+W^-\gamma/Z$ production at the LHC is generally larger than that at the ILC due to the additional LED contribution via $gg$ fusion subprocess and the KK-graviton exchanging resonant effect induced by the continuous large colliding energy in $pp$ collision. We conclude that the $W^{+}W^{-}\gamma$ and $W^{+}W^{-}Z$ productions at the LHC could have the distinct advantage over at the ILC from the aspect of effectively exploring the LED signal in measuring $W^+W^-\gamma/Z$ production.