Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session L10: Higgs Physics IIRecordings Available
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Sponsoring Units: DPF Chair: Lee Sawyer, Louisiana Tech University Room: Lyceum |
Sunday, April 10, 2022 3:45PM - 3:57PM |
L10.00001: Combination of searches for resonant and non-resonant Higgs boson pair production in the bbyy, bbΟ and bbbb decay channels using pp collisions at βs= 13 TeV with the ATLAS detectors Chi Lung Cheng A combination of searches for Higgs boson pair production is performed using up to 139 fb$^{-1}$ of proton-proton collision data at a center-of-mass energy $\sqrt{s}=13$ TeV recorded with the ATLAS detector at the LHC. The combination exploits three analyses searching for $HH$ decays to $bb\gamma\gamma$, $bb\tau\tau$ and $bbbb$. Results are interpreted in the context of non-resonant and resonant Higgs boson pair production scenarios. In the non-resonant interpretation, upper limits are set on the Higgs boson pair production cross-section and on the self-coupling modifier $\kappa_\lambda$. In the resonant interpretation, upper limits are set on the Higgs boson pair production cross-section as a function of the heavy resonance mass. |
Sunday, April 10, 2022 3:57PM - 4:09PM |
L10.00002: Measurement of the Higgs boson production cross section using the H -> tau tau process in Run 2 ATLAS data Marc Tost A measurement of the Higgs boson cross section using H -> tau tau decays is performed, with the result split into 4 production modes, with both hadronic and semi-hadronic decays considered. Data was taken by the ATLAS detector during Run 2 of CERN's Large Hadron Collider, with a center-of-mass energy of 13 TeV, resulting in 139 fb^{-1} of proton-proton collision data. Full unblinded results are shown. Special attention is paid to the associated top quark pair production mode, including a proposed differential cross section measurement of the transverse momentum of the Higgs boson using a neural network to improve the resolution. |
Sunday, April 10, 2022 4:09PM - 4:21PM |
L10.00003: Differential Measurement of ttH to Multilepton Final States at CMS using Run-2 Dataset Derek J Cranshaw Searching for deviations in the trilinear Higgs coupling resulting from NLO contributions to single Higgs production is a promising way to look for hints of BSM physics. The ttH production mode, despite its somewhat lower cross-section relative to other production channels, is a good candidate for this search, since a modified trilinear Higgs coupling induces particularly strong deviations in the Higgs kinematic distributions in this channel. This talk discusses the status of the ttH differential cross-section measurement in the multilepton final state from the CMS collaboration using the Run-2 dataset. A description of the ML techniques used to regress the Higgs pT, as well as an overview of the analysis strategy used to obtain the unfolded result, is presented. |
Sunday, April 10, 2022 4:21PM - 4:33PM |
L10.00004: Shining light on the Higgs: Study of the Higgs boson couplings to photons at the Large Hadron Collider Lucas S Mandacaru Guerra, Jeffrey R Davis, Andrei Gritsan, Savvas Kyriacou, Jeffrey S Roskes, Markus Schulze A study of anomalous Higgs boson interactions in production and decay was conducted with the JHUGenerator framework, focusing on photon couplings. The framework includes an event generator, the MELA library for matrix element analyses, and the JHUGenLexicon interface. The latter relates anomalous coupling formulation with popular EFT bases, allowing comparisons between kinematic distributions in multiple frameworks. The study also includes a comparison of next-leading-order electroweak corrections to the effects from the photon couplings under the effective field theory framework. Some of the content is illustrated with projections for experimental measurements with the full LHC and HL-LHC datasets. |
Sunday, April 10, 2022 4:33PM - 4:45PM |
L10.00005: CMS Higgs physics prospect at the HL-LHC Jiajing Mao
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Sunday, April 10, 2022 4:45PM - 4:57PM |
L10.00006: Search for Higgs Production via Vector Boson Fusion in the four-lepton final state using Artificial Neural Networks Walaa Elmetenawee This work presents a standalone measurement of the Higgs boson production cross-section in the VBF production mode performed in the H → ZZ → 4l (l=e,μ) channel. The study is done using datasets corresponding to proton-proton collision data produced at the LHC at √s = 13 TeV and collected by the CMS detector, equivalent to an integrated luminosity of 137 fb-1. A multivariate analysis is performed through the usage of an artificial neural network. Statistical shape analysis developed for two orthogonal jet-based categories is done by combining the discriminant distributions from each category. The Higgs VBF signal strength modifier and the significance of the present analysis have been estimated. |
Sunday, April 10, 2022 4:57PM - 5:09PM |
L10.00007: Search for Generic Heavy Higgs Boson Using 13 TeV pp Collision Data at ATLAS Yue Xu, Xin Chen, Shih-Chieh Hsu, Ke Li A search for a fermi-phobic heavy Higgs boson via the $pp \rightarrow W^{\pm}H \rightarrow W^{\pm}W^{\pm}W^{\mp}$ process with 139 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}=13~\text{TeV}$ collected by the ATLAS detector is presented. The heavy Higgs boson has potential dimension-6 effects in an effective field theory context, which can cause significant kinematic deviations from those predicted within the Standard Model. Events with two same-sign leptons ($e$ or $\mu$) in association with one large-R jet or two small-R jets with an invariant mass consistent with a hadronically decaying $W$-boson are analyzed to test for the presence of effects from new physics. |
Sunday, April 10, 2022 5:09PM - 5:21PM |
L10.00008: Measuring Diphoton Production in Association with Heavy Flavor with the ATLAS Detector Brianna Dwyer This unique analysis investigates the production of two photons in conjunction with heavy flavor quarks using the ATLAS detector at the Large Hadron Collider at CERN using the full Run 2 dataset with a center-of-mass energy of βπ =13 TeV. The πΎπΎ + heavy flavor jets process is a dominant background in at least two important analyses: the π»π»βπΎπΎππ process, which provides a direct probe of Electroweak Symmetry Breaking due to observation of the Higgs boson self-coupling and the π‘π‘Β―π»βπΎπΎ process, which is important for measuring the Yukawa coupling between the Higgs and top quark. Despite its importance, πΎπΎ + heavy flavor jets process has never generically been measured before, nor is there any direct prediction in literature. A template fit will be implemented to the jet flavor-tagging discriminant to extract the signal to measure the components of heavy flavor in πΎπΎ+πππ‘π . The measurements will be made in the single-jet or multi-jet categories that are a combination of b-, c-, and light-flavor jets (bb, bc, bl, etc.). Preliminary sensitivity estimates will be shown. |
Sunday, April 10, 2022 5:21PM - 5:33PM |
L10.00009: Multiple Higgs boson production from W_L W_L to distinguish SMEFT from HEFT in the presence of new physics. Raquel GΓ³mez-Ambrosio, Felipe J Llanes-Estrada, Alexandre Salas-Bernardez, Juan J Sanz-Cillero If there is new electroweak physics, it may well be out of reach of the accelerator effort. In that case Effective Field Theory becomes the logic tool to parameterize the results of new physics searches, and SMEFT has become the standard. However, the most general theory with the known particle content is HEFT, and whether this is needed or SMEFT suffices should be investigated in future experimental efforts. While the San Diego and other groups have established geometric criteria to distinguish SMEFT from HEFT, which can be useful for theorists examining specific beyond-SM completions, more phenomenological understanding is needed. |
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