分类: 核科学技术 >> 粒子加速器 提交时间: 2023-06-18 合作期刊: 《Nuclear Science and Techniques》
摘要: A test system is developed for the BESIII ETOF/MRPC beam tests of data acquisition, environment monitoring and automatic control. The software framework is based on the CAMAC bus, VME bus and Serial Port, which are responsible for communications with the detectors. The monitor system works well in the beam test.
分类: 物理学 >> 核物理学 提交时间: 2016-09-14
摘要: Based on J/ψ events collected with the BESIII detector, with corresponding Monte Carlo samples, the tracking efficiency and its systematic uncertainty are studied using a control sample of J/ψ→pp¯¯¯π+π−. Validation methods and different factors influencing the tracking efficiency are presented in detail. The tracking efficiency and its systematic uncertainty for protons and pions with the transverse momentum and polar angle dependence are also discussed.
分类: 物理学 >> 核物理学 提交时间: 2016-09-14
摘要: The LHC discovery of a light Higgs particle h0 (125GeV) opens up new prospect for searching heavier Higgs boson(s) at the LHC Run-2, which will unambiguously point to new physics beyond the standard model (SM). We study the detection of a heavier neutral Higgs boson H0 via di-Higgs production channel at the LHC (14TeV), H0→h0h0→WW∗γγ. This directly probes the Hhh cubic Higgs interaction, which exists in most extensions of the SM Higgs sector. For the decay products of final states WW∗, we include both pure leptonic mode WW∗→ℓν¯ℓ¯ν and semi-leptonic mode WW∗→qq¯′ℓν. We analyze signals and backgrounds by performing fast detector simulation for the full processes pp→H→hh→WW∗γγ→ℓν¯ℓ¯νγγ and pp→H→hh→WW∗γγ→ℓνqq¯′γγ, over the mass range MH=250−600GeV. For generic two-Higgs-doublet models (2HDM), we present the discovery reach of the heavier Higgs boson at the LHC Run-2, and compare it with the current Higgs global fit of the 2HDM parameter space.