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arXiv 1411.3441hep-ex
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希格斯玻色子自旋宇称和反常HVV耦合在7和8 TeV质子碰撞中的约束

Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV

CMS Collaboration

摘要:

利用H到ZZ、Z γ *、γ * γ * 到4 l、H到WW到1 nu l nu和H到γ γ衰变模式,研究了最近发现的希格斯玻色子相互作用的自旋宇称和张量结构.使用CMS实验在LHC运行1期间记录的完整数据集,对应于在7 TeV的质心能量下高达5.1个反毫微微电子能垒的积分亮度和在8 TeV下高达19.7个反毫微微电子能垒。在99%或更高的置信水平下,或在99.87%的置信水平下,对于最小的类重力耦合,排除了广泛的自旋2模型,无论是否对产生机制进行了假设。在ZZ和WW模式中,任何混合宇称自旋为1的状态都被排除在99.999%的置信水平之外。在自旋为零玻色子的假设下,研究了希格斯玻色子玻色子与两个矢量玻色子ZZ、Z γ、γ γ和WW相互作用的张量结构,并给出了11个反常贡献的极限.通过结合HZZ和HWW测量,获得了对异常HVV相互作用的更严格的约束。所有观测结果都与标准模型希格斯玻色子的预期一致,其量子数J[PC]=0[++]。

英文摘要:

The study of the spin-parity and tensor structure of the interactions of the recently discovered Higgs boson is performed using the H to ZZ, Z gamma*, gamma* gamma* to 4 l, H to WW to l nu l nu, and H to gamma gamma decay modes. The full dataset recorded by the CMS experiment during the LHC Run 1 is used, corresponding to an integrated luminosity of up to 5.1 inverse femtobarns at a center-of-mass energy of 7 TeV and up to 19.7 inverse femtobarns at 8 TeV. A wide range of spin-two models is excluded at a 99% confidence level or higher, or at a 99.87% confidence level for the minimal gravity-like couplings, regardless of whether assumptions are made on the production mechanism. Any mixed-parity spin-one state is excluded in the ZZ and WW modes at a greater than 99.999% confidence level. Under the hypothesis that the resonance is a spin-zero boson, the tensor structure of the interactions of the Higgs boson with two vector bosons ZZ, Z gamma, gamma gamma, and WW is investigated and limits on eleven anomalous contributions are set. Tighter constraints on anomalous HVV interactions are obtained by combining the HZZ and HWW measurements. All observations are consistent with the expectations for the standard model Higgs boson with the quantum numbers J[PC]=0[++].

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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