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arXiv 1503.03643hep-ex
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用ATLAS探测器测定$WW^\ast \to e νμν$衰变道中希格斯玻色子的自旋和宇称

Determination of spin and parity of the Higgs boson in the $WW^\ast \to e νμν$ decay channel with the ATLAS detector

ATLAS Collaboration

摘要:

基于大型强子对撞机ATLAS探测器收集的质子-质子碰撞数据,对希格斯玻色子在$WW^\ast \to e νμν$末态的自旋和宇称量子数进行了研究,对应的积分亮度为20.3 fb $^{-1}$,质心能量为$\sqrt{s}=8$ TeV.标准模型自旋宇称$J^{CP} = 0^{++}$假设与自旋和CP的替代假设进行了比较。本文还研究了在超出标准模型的情况下,观测到的共振是类标准模型的希格斯玻色子和CP偶($J^{CP} = 0^{++}$)或CP奇($J^{CP} = 0^{+-}$)希格斯玻色子的混合物的情况。发现这些数据与标准模式的预测是一致的,并限制了其他自旋和CP假设,包括CP混合在不同的情况下。

英文摘要:

Studies of the spin and parity quantum numbers of the Higgs boson in the $WW^\ast \to e νμν$ final state are presented, based on proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 20.3 fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s}=8$ TeV. The Standard Model spin-parity $J^{CP} = 0^{++}$ hypothesis is compared with alternative hypotheses for both spin and CP. The case where the observed resonance is a mixture of the Standard-Model-like Higgs boson and CP-even ($J^{CP} = 0^{++}$) or CP-odd ($J^{CP} = 0^{+-}$) Higgs boson in scenarios beyond the Standard Model is also studied. The data are found to be consistent with the Standard Model prediction and limits are placed on alternative spin and CP hypotheses, including CP mixing in different scenarios.

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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