earch for a W′ boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state at $$ \sqrt{\mathrm{s}} $$ = 13 TeV
earch for a W′ boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state at $$ \sqrt{\mathrm{s}} $$ = 13 TeV
复制标题
寻找在 $$ sqrt{mathrm{s}} $$ = 13 TeV 处全射流最终状态下衰变为矢量夸克和顶夸克或底夸克的 W−玻色子
DOI：
10.1007/jhep09(2022)088
复制
发表时间：
2022
影响因子：
5.4
通讯作者：
Krammer, N.
中科院分区：
文献类型：
--
作者：
Tumasyan, A.;Adam, W.;Andrejkovic, J. W.;Bergauer, T.;Chatterjee, S.;Dragicevic, M.;Escalante Del Valle, A.;Frühwirth, R.;Jeitler, M.;Krammer, N.
研究了重W′玻色子共振分别衰减到类B或T矢量夸克和at或ab夸克的情况.分析是使用在LHC的CMS探测器收集的质子-质子碰撞进行的。这些数据对应于138 fb− 1的积分光度，质心能量为13 TeV。这两个衰变通道都会产生at夸克、希格斯玻色子或Z玻色子和ab夸克的签名，每一种都是在显着的洛伦兹增强下产生的。希格斯或Z玻色子和t夸克的全强子衰变是使用喷注子结构技术来减少标准模型背景而选择的，从而产生了明显的三喷注W′玻色子衰变特征。未观察到数据相对于标准模型背景预测的显著偏差。上限设定在W′玻色子截面和最终态分支分数的乘积的95%置信水平。考虑到民主分支分数的基准模型假设，质量低于3.1 TeV的AW′玻色子被排除在外。此外，根据这些假设的一般化设定限制。这是迄今为止对这种最终状态最敏感的限制。
A search is presented for a heavy W′ boson resonance decaying to a B or T vector-like quark and at or ab quark, respectively. The analysis is performed using proton-proton collisions collected with the CMS detector at the LHC. The data correspond to an integrated luminosity of 138 fb− 1 at a center-of-mass energy of 13 TeV. Both decay channels result in a signature with at quark, a Higgs or Z boson, and ab quark, each produced with a significant Lorentz boost. The all-hadronic decays of the Higgs or Z boson and of the t quark are selected using jet substructure techniques to reduce standard model backgrounds, resulting in a distinct three-jet W′ boson decay signature. No significant deviation in data with respect to the standard model background prediction is observed. Upper limits are set at 95% confidence level on the product of the W′ boson cross section and the final state branching fraction. AW′ boson with a mass below 3.1 TeV is excluded, given the benchmark model assumption of democratic branching fractions. In addition, limits are set based on generalizations of these assumptions. These are the most sensitive limits to date for this final state.