Constraints on models of the Higgs boson with exotic spin and parity using decays to bottom-antibottom quarks in the full CDF data set.
Constraints on models of the Higgs boson with exotic spin and parity using decays to bottom-antibottom quarks in the full CDF data set.
复制标题
使用完整 CDF 数据集中的底反底夸克衰变对具有奇异自旋和宇称的希格斯玻色子模型进行约束。
DOI：
10.1103/physrevlett.114.141802
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发表时间：
2015
影响因子：
8.6
通讯作者：
Aaltonen T
中科院分区：
文献类型：
--
作者：
Aaltonen T
寻找粒子的质量和耦合的标准模型希格斯玻色子，但不同的自旋和宇称量子数相同。我们测试了两种具体的替代希格斯玻色子假设：具有自旋宇称的伪标量希格斯玻色子和具有自旋宇称的类引力子希格斯玻色子，假设两者的质量都是。我们寻找这些奇异的状态与矢量玻色子和衰变成一个底反底夸克对。矢量玻色子通过衰变为电子或μ子对，或者电子或μ子和中微子，或者从总横动量的不平衡中推断出来。我们使用包含外来希格斯玻色子和那些包含标准模型希格斯玻色子的事件之间的预期运动学差异。这些数据是由CDF实验在Tevatron质子-反质子对撞机上收集的，该对撞机的质心能量为，对应于积分光度为。我们排除了标准模型的预测与希格斯玻色子的质量在5个标准差的水平偏差，假设信号强度为外来玻色子生产等于标准模型希格斯玻色子的预测，并设置上限约为30%，相对于标准模型率的可能生产率的每个异国情调的状态。
A search for particles with the same mass and couplings as those of the standard model Higgs boson but different spin and parity quantum numbers is presented. We test two specific alternative Higgs boson hypotheses: a pseudoscalar Higgs boson with spin-parityand a gravitonlike Higgs boson with, assuming for both a mass of. We search for these exotic states produced in association with a vector boson and decaying into a bottom-antibottom quark pair. The vector boson is reconstructed through its decay into an electron or muon pair, or an electron or muon and a neutrino, or it is inferred from an imbalance in total transverse momentum. We use expected kinematic differences between events containing exotic Higgs bosons and those containing standard model Higgs bosons. The data were collected by the CDF experiment at the Tevatron proton-antiproton collider, operating at a center-of-mass energy of, and correspond to an integrated luminosity of. We exclude deviations from the predictions of the standard model with a Higgs boson of massat the level of 5 standard deviations, assuming signal strengths for exotic boson production equal to the prediction for the standard model Higgs boson, and set upper limits of approximately 30% relative to the standard model rate on the possible rate of production of each exotic state.
希格斯玻色子物理学
影响因子：
4.4
作者：
L. Reina
通讯作者：
L. Reina