A bstract Suppose a heavy neutral Higgs or scalar boson H is discovered at the LHC, it is important to investigate its couplings to the standard model particles as much as possible. Here in this work we attempt to probe the CP-even and CP-odd couplings of the heavy Higgs boson to a pair of top quarks, through the decay H → t t ˉ → b W + b ˉ W ? $$ Ho toverline{t}o b{W}^{+}overline{b}{W}^{-} $$ . We use the helicity-amplitude method to write down the most general form for the angular distributions of the final-state b quarks and W bosons. We figure out that there are 6 types of angular observables and, under C P T ? $$ mathrm{C}mathrm{P}ilde{mathrm{T}} $$ conservation, one-dimensional angular distributions can only reveal two of them. Nevertheless, the H couplings to the t t ˉ $$ toverline{t} $$ pair can be fully determined by exploiting the one-dimensional angular distributions. A Higgs-boson mass of 380 GeV not too far above the t t ˉ $$ toverline{t} $$ threshold is illustrated with full details. With a total of 10_(4)events of H → t t ˉ → b W + b ˉ W + $$ Ho toverline{t}o b{W}^{+}overline{b}{W}^{+} $$ , one can determine the couplings up to 10-20% uncertainties.
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机译：Bstract假设在LHC在LHC中发现了沉重的中性Higgs或标量玻色子H，重要的是尽可能地研究其与标准模型颗粒的联接器。在这项工作中，我们试图通过衰变H→T T→B→T T→W探测重金属玻色子的CP-op和CP-odd耦合到一对顶部夸曲面。 $$ h to t overline {t} to b {w} ^ {+} ovline {b} {w} ^ { - } $$。我们使用螺旋度幅度方法写下最终状态B夸克和W玻色子的角分布的最通用形式。我们弄清楚有6种角度可观察到，并且在c p t下面？ $$ mathrm {c} mathrm {p} tilde { mathrm {t}} $$ vertencation，一维角分布只能揭示其中的两个。然而，通过利用一维角分布，可以完全确定对TT∈$$ t overline {t} $$对的H耦合。 Higgs-Boson Mass的380 Gev在t tˉ$$ t overline {t} $$阈值以完整的详细信息说明。总共10_（4）个事件的H→TT→B W +BˉW+ $$ H overline {T} 到B {W} ^ {+} overline {b} {w } ^ {+} $$，可以确定高达10-20％的联轴器的不确定性。
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