Search for high-mass diboson resonances with boson-tagged jets in proton-proton collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
Search for high-mass diboson resonances with boson-tagged jets in proton-proton collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
复制标题
使用 ATLAS 探测器在 s = 8 $$ sqrt{s}=8 $$ TeV 的质子-质子碰撞中搜索带有玻色子标记喷流的高质量双玻色子共振
DOI：
10.1007/jhep12(2015)055
复制
发表时间：
2015
影响因子：
5.4
通讯作者：
Aad G
中科院分区：
文献类型：
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作者：
Aad G
使用20搜索衰减成WW、WZ或ZZ玻色子对的窄共振。3 fb− 1的质子-质子碰撞数据，质心能量为TeV，由大型强子对撞机的ATLAS探测器记录。质量在1.3至3.0 TeV范围内的Diboson共振寻求后，使用不变的质量分布的dijets，其中两个射流被标记为玻色子射流，兼容的高度提升的W或Z玻色子衰变到夸克，使用射流质量和子结构特性。从一个平稳下降的背景中观察到的dijet不变的质量分布的最大偏差发生在2 TeV左右的WZ通道，具有全球意义的2.5个标准差。在95%的置信水平上，将新的重规范玻色子W′的WZ终态和体Randall-Sundrum模型中的引力子的Kaluza-Klein激发的WW和ZZ终态的产生截面乘以分支比设定为共振质量的函数。在95%的置信水平下，排除了质量范围为1.3 ~ 1.5TeV的扩展规范模型预测的耦合W′玻色子。
A search is performed for narrow resonances decaying into WW, WZ, or ZZ boson pairs using 20. 3 fb− 1 of proton-proton collision data at a centre-of-mass energy ofTeV recorded with the ATLAS detector at the Large Hadron Collider. Diboson resonances with masses in the range from 1.3 to 3.0 TeV are sought after using the invariant mass distribution of dijets where both jets are tagged as a boson jet, compatible with a highly boosted W or Z boson decaying to quarks, using jet mass and substructure properties. The largest deviation from a smoothly falling background in the observed dijet invariant mass distribution occurs around 2 TeV in the WZ channel, with a global significance of 2.5 standard deviations. Exclusion limits at the 95% confidence level are set on the production cross section times branching ratio for the WZ final state of a new heavy gauge boson, W′, and for the WW and ZZ final states of Kaluza-Klein excitations of the graviton in a bulk Randall-Sundrum model, as a function of the resonance mass. W′ bosons with couplings predicted by the extended gauge model in the mass range from 1.3 to 1.5 TeV are excluded at 95% confidence level.