Conveners
Parallel 2: Higgs 1
- yanping huang (ihep)
- Yanping Huang (高能所)
Parallel 2: Higgs 2
- Junquan (军全) TAO (陶) (IHEP/CAS (中科院高能所))
Parallel 2: Higgs 3
- Xiaocong Ai (Zhengzhou University)
Parallel 2: Higgs 4
- Chen（辰） Zhou（周） (Peking University（北京大学）)
Parallel 2: BSM 1
- Yanlin (彦麟） Liu (刘） (Shandong University)
Parallel 2: EW + top
- 子瑞 Zirui 王 Wang (复旦大学 Fudan University)
Description
Tecent meeting link: https://meeting.tencent.com/dm/hK9mzUpdHwrj
Meeting ID: 964-4383-4856
会议主题：CLHCP2025 parellel 2: Higgs/BSM/EW/Top
会议时间：2025/10/30 14:00-20:00 (GMT+08:00) 中国标准时间 - 北京
重复周期：2025/10/30-2025/11/02 14:00-20:00, 每天
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The precise study of Higgs boson production is essential both for testing the Standard Model and for probing the Higgs self-coupling through di-Higgs processes. Last year, ATLAS presented a combination of Higgs-pair (HH) searches, setting the most stringent limits to date on the Higgs self-coupling. Building on this, we present new results from single-Higgs (H) analyses obtained this year,...
The talk with present a study of the CP properties of the Higgs boson produced through vector-boson fusion mode. The analysis is using the full Run2 data collected by the ATLAS experiment at the LHC. The talk will highlight the motivation for this study, the main analysis parts like the background estimation and the signal categorisation, and finally the results will be shown. Results are...
A test of CP invariance in Higgs boson production via vector-boson fusion has been performed in the H → γγ channel using 165 fb-1 ATLAS Run-3 pp collision data at $\sqrt{s}$=13.6 TeV. The optimal observable is used to probe the CP structure of interactions between the Higgs boson and electroweak gauge bosons, as described by an effective field theory. Expected constraints on the...
Higgs boson plays a fundamental role in Standard Model. The precise measurement of Higgs couplings can help us have a better understanding of SM and explore potential new physics beyond it. The combination method can give us a higher precision and sensitivity, which is an essential experimental way. In this talk, I will present combined measurements of Higgs boson production and decay using up...
We discuss the most recent results obtained by the CMS Collaboration on properties of the Higgs boson (mass, natural width, couplings, ..) using diphoton (γγ) decays.
A reliable determination of the Higgs production mechanism in hadron collider experiments is essential in the program of the measurements of the Higgs couplings. We employ weak supervision, CWoLa in particular, to train deep neural networks using real data of the diphoton events, in the hope of reducing biases resulting from Monte Carlo simulations. Models based on the convolutional neural...
The Higgs boson’s decay to a pair of muons provides a direct probe of its Yukawa coupling to second-generation fermions. In this talk, I will presents the newest results from the ATLAS experiment based on proton-proton collision data collected in LHC Run 3 during 2022~2024, and the combination with the Run 2 results, incorporating several improvements. This measurement significantly enhance...
SMEFT and HEFT are two popular EFTs in searching for new physics. We report a comparison between them in predictions for Higgs boson pair production.
我们对多轻子末态下的 ttH 产生截面进行了精密测量，并通过控制 ttW 背景提高灵敏度。在标准模型中，tt̄H 的分支比小、信号稀少，且与 tt̄W/tt̄Z 背景强相关，使得信号提取十分具有挑战性。
本分析定义了六类按轻子数与类型划分的末态，并采用全局拟合同时约束信号与背景。测得 tt̄H 产生截面为 321⁺¹⁰²₋₉₉ fb，与 SM 预言一致，显著性为 观测 3.3σ、期望 5.3σ。在 STXS 框架下完成了随希格斯横动量的微分测量；同时进行的 tt̄H/tHq 联合分析得到信号强度：μ(tt̄H)=0.59⁺⁰·²²₋₀·²⁰，μ(tHq)=8.9⁺⁵·⁵₋₅·₀。CP 性质研究结果支持 SM 的 CP-even 预测，并以 1.8σ 排除了纯 CP-odd 假设。
与之前...
The ATLAS and CMS experiments are unique drivers of our fundamental understanding of nature at the energy frontier. In this contribution to the update of the European Strategy for Particle Physics, we update the physics reach of these experiments at the High-Luminosity LHC (HL-LHC) in a few key areas where they will dominate the state-of-the-art for decades to come.
Ref. Phys. Rev. D 111 (2025) 032006, arXiv:2411.02040
A search for the production of three Higgs bosons ($HHH$) in the $b\bar{b}b\bar{b}b\bar{b}$ final state is presented. The search uses $126~\text{fb}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector at the Large Hadron Collider. The analysis targets both non-resonant and resonant production of...
A search for the production of a Higgs boson in association with two vector bosons via vector boson scattering is presented. The search uses CMS data from proton-proton collisions at $\sqrt{s} = 13\mathrm{TeV}$ collected from 2016 to 2018, corresponding to an integrated luminosity of $138\mathrm{fb^{-1}}$. Selected events are consistent with the presence of two jets originating from vector...
Ref. Phys. Rev. Lett. 134 (2025) 121801
A search is performed for dark matter particles produced in association with a resonantly produced pair of b-quarks with $30 < m_{bb} < 150$ GeV using 140 $fb^{−1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. This signature is expected in extensions of the Standard Model predicting the...
We investigate the phenomenological prospects of the Two Higgs Doublet and Singlet Scalar Extension (2HDMS) In this work, we perform an exhaustive scan to find representative benchmarks which are consistent with all theoretical and experimental constraints. We focus on the relevant signatures at the LHC，especially about the oblique parameters, and at proposed future lepton colliders...
A search for the resonant production of a heavy scalar X decaying into a Higgs boson and a lighter scalar S, through the process X→S ( → b b) H ( → γ γ) , where the two photons are consistent with the Higgs boson decay, is performed. The search is conducted using integrated luminosities of 140 fb^{−1} and 58.6 fb^{−1} of proton--proton collision data at centre-of-mass energies of 13~TeV and...
The latest results of search for light Higgs bosons in diphoton channel at CMS with Run2 data, are presented. The talks will cover both the low-mass results with the paper published by PLB in January 2025, and the very low-mass results which were released in March 2025.
Boosted boson jet tagging has been a central focus of both theoretical and experimental high-energy physics research over the past decades, serving as a major driver of innovation at the energy frontier. We leverage the powerful ParT tagger in CMS to search for boosted H->WW and W->cb jets across multiple channels. Public results from the 0L-channel H->WW search will be presented, along with...
The phenomenological Minimal Supersymmetric Standard Model (pMSSM) scan is an analytical approach designed to reinterpret ATLAS Run 2 searches for supersymmetry (SUSY). This study evaluates and summarizes the sensitivity of ATLAS searches from Run 2 and anticipates possibilities for Run 3, all while incorporating additional constraints from dark matter (DM), flavor physics, electroweak...
In this article, we investigate the possibility of enhancing the di-jet resonance
search by tagging the final state radiation (FSR) jets, using an event-level deep neural network. It is found that solely relying on the 4-momenta of the leading three jets allows the algorithm to achieve good discriminating power that can identify the hardest FSR jet in signal, while rejecting that in...
A search for dark matter (DM) particles produced in association with bottom quarks using proton-proton collision data at a center-of-mass energy of √s= 13 TeV, corresponding to an integrated luminosity of 138fb−1 is presented. The search is performed in a final state with large missing transverse momentum and a pair of jets originating from bottom quarks. No significant excess of data is...
Measurements of $W^+W^- \to e^\pm \nu \mu^\mp \nu$ production cross-sections are presented, providing a test of the predictions of perturbative quantum chromodynamics and the electroweak theory. The measurements are based on data from $pp$ collisions at $\sqrt{s} = 13$ TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015-2018, corresponding to an integrated luminosity of 140...
The spin-1 nature of gluon caused correlations in subsequent parton radiations insdie jets. Such effects were fully incorporated in limited parton shower models. The correlation is measured for the first time in experiments, and compared to MC models.
A search for Higgs boson pair production in the $b \bar{b} \gamma \gamma$ final state is performed.
The proton--proton collision dataset corresponds to an integrated luminosity of 308 fb$^{-1}$, consisting of two samples, 140 fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s} = 13 TeV$ and 168 fb$^{-1}$ at $\sqrt{s} =13.6 TeV$, recorded between 2015 and 2024 by the ATLAS detector at the CERN...
