论文标题
搜索Higgs Boson使用$ \ sqrt {s} = 13 $ tev的$ pp $ collisions在4 $ b $ channel的两个新的低质量旋转0粒子中衰减。
Search for Higgs boson decays into two new low-mass spin-0 particles in the 4$b$ channel with the ATLAS detector using $pp$ collisions at $\sqrt{s}= 13$ TeV
论文作者
论文摘要
This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into $b$-quark pairs, $H \rightarrow aa \rightarrow (b\bar{b})(b\bar{b})$, using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy $ \ sqrt {s} = 13 $ tev。这项搜索重点关注衰减产品的准则，在$ 15 \ leq m_a \ leq 30 $ GEV的范围内，并且与以前在同一最终状态的搜索相辅相成，该状态针对衰减产品的范围良好的范围$ 20 \ leq m_a \ leq m_a \ leq leq 60 $ gev。鉴定$ a \ rightarrow b \ bar {b} $衰减的一种新颖策略是为提高具有较小分离角度的拓扑的效率。搜索是在2015年和2016年收集的36 fb $^{ - 1} $进行的，并设定了$ h \ rightarrow aa \ rightarrow（b \ bar {b}）（b \ bar {b}）$的生产横截面上的上限。
This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into $b$-quark pairs, $H \rightarrow aa \rightarrow (b\bar{b})(b\bar{b})$, using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy $\sqrt{s}=13$ TeV. This search focuses on the regime where the decay products are collimated and in the range $15 \leq m_a \leq 30$ GeV and is complementary to a previous search in the same final state targeting the regime where the decay products are well separated and in the range $20 \leq m_a \leq 60$ GeV. A novel strategy for the identification of the $a \rightarrow b\bar{b}$ decays is deployed to enhance the efficiency for topologies with small separation angles. The search is performed with 36 fb$^{-1}$ of integrated luminosity collected in 2015 and 2016 and sets upper limits on the production cross-section of $H \rightarrow aa \rightarrow (b\bar{b})(b\bar{b})$, where the Higgs boson is produced in association with a $Z$ boson.
