Search for resonant and non-resonant Higgs boson pair production in the bb ll final state at s = 13 TeV
Search for resonant and non-resonant Higgs boson pair production in the bb ll final state at s = 13 TeV
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2017
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给出了共振和非共振成对产生的Higgs玻色子（hh）分别衰变为bb和VV（其中V是W玻色子或Z玻色子），随后VV衰变为两个轻子和两个中微子的计算结果.这些分析是基于LHC上能量为13 TeV的质子-质子碰撞样本，对应于36 fb−1的积分光度。标准模型的数据和预测在不确定性范围内是一致的。对于标准模型hh假设，观察到的数据（预期）排除了72（81+42 −25）fb的生产截面乘以分支比，对应于79（89 + 47 −28）乘以SM截面。缺乏偏离SM预测的观测是用来放置在不同的情况下考虑异常耦合，这可能会影响HH生产的速率和运动学的约束。在共振产生新粒子X的情况下，对于从mX = 300 GeV到mX = 900 GeV的质量假设，观察数据（预期）排除窄宽度自旋0粒子的产生横截面乘以分支比为434至17（342+135 −97到14 + 6 −4）fb和窄宽度自旋2粒子从448到14（361+140 −102到13 + 5 −4）fb。
Searches for resonant and non-resonant pair-produced Higgs bosons (hh) decaying respectively into bb and VV (with V either a W or a Z boson), with subsequent VV decays into two leptons and two neutrinos, are presented. The analyses are based on a sample of proton-proton collisions at √ s = 13 TeV at the LHC corresponding to an integrated luminosity of 36 fb−1. Data and predictions from the standard model are in agreement within uncertainties. For the standard model hh hypothesis, the data are observed (expected) to exclude a production cross-section times branching ratio of 72 (81+42 −25) fb, corresponding to 79 (89 +47 −28) times the SM cross section. Lack of deviation from the SM predictions in the observations is used to place constraints on different scenarios considering anomalous couplings which could affect the rate and kinematics of hh production. In the case of resonant production of a new particle X, for mass hypotheses from mX = 300 GeV to mX = 900 GeV, the data are observed (expected) to exclude a production cross-section times branching ratio of narrow-width spin-0 particles from 434 to 17 (342+135 −97 to 14 +6 −4) fb and narrow-width spin-2 particles from 448 to 14 (361+140 −102 to 13 +5 −4) fb.