Probing the topcolor-assisted technicolor model via the single t-quark production at the CERN LHC
Probing the topcolor-assisted technicolor model via the single t-quark production at the CERN LHC
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通过 CERN LHC 的单 t 夸克生产探索顶色辅助彩色模型
DOI：
10.1103/physrevd.77.115006
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发表时间：
2008-03
影响因子：
5
通讯作者：
Yanhui Xi
中科院分区：
文献类型：
--
作者：
Huiling Jin;Yanju Zhang;Xuelei Wang;Yanhui Xi
质子 - 质子碰撞中的单顶夸克产生可以通过三个不同的过程进行：tq、tb、tW产生。随着欧洲核子研究中心（CERN）的大型强子对撞机（LHC）的运行，它有很好的潜力去测量每一种单顶夸克产生模式。
The single t-quark production in proton-proton collisions can proceed through three distinct processes: tq, tb, tW productions. With the running of the Large Hadron Collider (LHC) at CERN, it has good potential to measure each single t-quark production mode. The topcolor-assisted technicolor (TC2) model, one of the promising dynamical theories, predicts some new particles at the several hundred GeV scale: three top-pion bosons ({pi}{sub t}{sup {+-}}, {pi}{sub t}{sup 0}) and one top-Higgs boson (h{sub t}). These particles are regarded as the typical feature of the TC2 model and can contribute to some processes. In this paper, we systematically study the contribution of the TC2 model to the single t-quark production at the Hadron colliders, especially at the LHC. The TC2 model can contribute to the cross section of the single t-quark production in two different ways. First, the existence of the top pions and top Higgs can modify the Wtb coupling via their loop contributions, and such modification can cause the correction to the cross sections of all three production modes. Our study shows that this kind of correction is negative and very small in all cases. Thus it is difficult to observe such a correction even at the LHC.more » On the other hand, there exist the tree-level flavor-changing (FC) couplings in the TC2 model which can also contribute to the cross sections of the tq and tb production processes. The resonant effect can greatly enhance the cross sections of the tq and tb productions. The first evidence of the single t-quark production has been reported by the D0 collaboration and the measured cross section for the single t-quark production of {sigma}(pp{yields}tb+X,tqb+X) is compatible at the 10% level with the standard model prediction. Because the light top pion can make a great contribution to the tb production, the top-pion mass should be very large in order to make the predicted cross section in the TC2 model be consistent with the Tevatron experiments. More detailed information about the top-pion mass and the FC couplings in the TC2 model should be obtained with the running of the LHC.« less
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影响因子：
5
作者：
Chong-Sheng Li;R. J. Oakes;Jin Min Yang
通讯作者：
Chong-Sheng Li;R. J. Oakes;Jin Min Yang
影响因子：
5
作者：
T. Stelzer;Z. Sullivan;S. Willenbrock
通讯作者：
T. Stelzer;Z. Sullivan;S. Willenbrock
影响因子：
5
作者：
Z. Sullivan
通讯作者：
Z. Sullivan
影响因子：
5
作者：
Xue-lei Wang;Xiaoxue Wang
通讯作者：
Xue-lei Wang;Xiaoxue Wang
影响因子：
4.4
作者：
D. Carlson;E. Malkawi;C. Yuan
通讯作者：
D. Carlson;E. Malkawi;C. Yuan