Higgs cross-section (including di-Higgs) with ATLAS and CMS

The latest results of Higgs cross section measurements from the ATLAS and CMS experiments were presented. This proceeding focuses on the production cross section measurement under the simplified template cross section framework in multiple decay modes and their combination. This proceeding also covers the differential cross section measurement and di-Higgs cross section limits and the interpretation of self-coupling constants. Most of the results are based on the full LHC Run 2 dataset and achieve the highest sensitivity to date which marks an important milestone of Higgs physics entering the precision era.Comment: Contribution to the 2023 QCD session of the 57th Rencontres de Morion

Induction of Changes Over time in the Rat Proximal Femur Following Ovariectomy: A Model with Clinical Implications

The menopause-related expansion of the proximal femoral marrow cavity is thought to have implications  for the long-term cohesion of hip prostheses. This theory would be further strengthened if there was evidence  to show that the expansion of the proximal femur marrow cavity takes place after the occurrence of  a femoral neck fracture, which, it is often recommended, should be fixed with a hip prosthesis. But till now,  the temporal relationship between those two osteoporotic-related changes has not been checked carefully.  The objective of the current study was to examine the temporal relationship between the marrow cavity  expansion of the proximal femur and the biomechanical deterioration of the femoral neck in a rat model.  To do so, a cross-sectional study with multiple time points was carried out on 6-month old Sprague-Dawley  rats, which were ovariectomized or sham-operated (as controls). The biomechanical properties of the femur  neck and geometrical parameters of the femur shaft were evaluated at 0, 3, 6, 9, 12, 15, 18, and 21 weeks  postoperatively, with special reference to the timescale of the observed changes. We found that the maximum  load of the femoral neck in ovariectomized rats could bear decreased significantly compared, to that  of controls, at 9 weeks postoperatively (p=0.03), while the marrow cavity of the proximal femur in ovariectomized  rats turned out to be significantly enlarged at 15 weeks postoperatively (p=0.04). Conclusion: Our  result demonstrated that the osteoporosis-related marrow-enlarged posterior led to the collapse of femoral  neck strength. If the change in postmenopausal women is analogous to that in ovariectomized rats, the  menopause-related marrow cavity expansion would be a risk factor for the longevity of hip prostheses.

Cr3_3X4_4 (X=Se, Te) monolayers as new platform to realize robust spin filter, spin diode and spin valve

Two-dimensional ferromagnetic (FM) half-metals are promising candidates for advanced spintronic devices with small-size and high-capacity. Motivated by recent report on controlling synthesis of FM Cr$_3$Te$_4$ nanosheet, herein, to explore the potential application in spintronics, we designed spintronic devices based on Cr$_3$X$_4$ (X=Se, Te) monolayers and investigated their spin transport properties. We found that Cr$_3$Te$_4$ monolayer based device shows spin filtering and dual spin diode effect when applying bias voltage, while Cr$_3$S$_4$ monolayer is an excellent platform to realize a spin valve. The different transport properties are primarily ascribed to the semiconducting spin channel, which is close to and away from the Fermi level in Cr$_3$Te$_4$ and Cr$_3$Se$_4$ monolayers, respectively. Interestingly, the current in monolayer Cr$_3$Se$_4$ based device also displays a negative differential resistance effect (NDRE) and a high magnetoresistance ratio (up to 2*10$^3$). Moreover, we found thermally induced spin filtering effect and NDRE in Cr$_3$Se$_4$ junction when applying temperature gradient instead of bias voltage. These theoretical findings highlight the potential of Cr$_3$X$_4$ (X=Se, Te) monolayers in spintronic applications and put forward realistic materials to realize nanosale spintronic device

Higgs cross-section (including di-Higgs) with ATLAS and CMS

The latest results of Higgs cross section measurements from the ATLAS and CMS experiments are presented. This presentation focuses on the production cross section measurement under the simplified template cross section framework in multiple decay modes and their combination and also covers the differential cross section measurement and di-Higgs cross section measurement and the interpretation of self-coupling constants. Most of the results are based on the full LHC Run 2 dataset, achieving the highest sensitivity to date and marking an important milestone of Higgs physics entering precision era.The latest results of Higgs cross section measurements from the ATLAS and CMS experiments were presented. This proceeding focuses on the production cross section measurement under the simplified template cross section framework in multiple decay modes and their combination. This proceeding also covers the differential cross section measurement and di-Higgs cross section limits and the interpretation of self-coupling constants. Most of the results are based on the full LHC Run 2 dataset and achieve the highest sensitivity to date which marks an important milestone of Higgs physics entering the precision era

Measurements of multi-boson productions including vector-boson fusion and vector-boson scattering at ATLAS

The electroweak production of multi-boson processes are a powerful tool to probe the Standard Model. The processes are sensitive to gauge boson self-interactions, which is related to non-Abelian structure of the electroweak interactions. Such processes also offer discovery opportunities. In this talk the latest results are presented, including Zyjj, ZZjj and WWW processes

Higgs cross-section (including di-Higgs) with ATLAS and CMS

This slides report the latest results on Higgs cross section measurement on ATLAS and CMS, focusing STXS results and di-Higgs results, mentioning differential XS

Measurements of the Higgs cross section and inclusive ZZ lineshape using 4ℓ\ell final state with the ATLAS experiment

The physics analyses presented in this dissertation use four-lepton (4$\ell, ~\ell = e, \mu$) final state to measure the Higgs boson to $ZZ$ coupling, and the inclusive $ZZ$ production lineshape with data collected by the ATLAS experiment in the proton-proton collisions of the Large Hadron Collider (LHC) at a center-of-mass energy of $\sqrt{s} = 13~{Te\kern -0.1em V}$. The first analysis presented is the Higgs boson production cross section measurement in reaction of $H \rightarrow ZZ^* \rightarrow 4\ell$. The 4$\ell$ final state has the highest signal to background ratio compared to all other Higgs decay channels, thus it is ideal for precision measurement of the Higgs properties. The analysis uses the full Run 2 dataset, corresponding to an integrated luminosity of 139 $fb^{-1}$. The Higgs boson production mode and kinematic variables are used to categorize the selected Higgs events both at fiducial and the reconstructed level under the latest Simplified Template Cross Section(STXS) framework to reduce the dependence on uncertainties of theoretical modeling. In each of the signal category in the Higgs mass window with enough statistics, multivariate analysis is performed to further separate Higgs signal from different production modes and the Standard Model (SM) background. The output discriminant is used as the observable in the simultaneous fit to extract the Higgs boson production cross section. Furthermore, several new categories are optimized in the Higgs mass side-band region to constrain SM background from data. The inclusive cross section times branching ratio over the SM prediction in the Higgs production rapidity range, $|y_H| 4\ Ge\kern -0.1em V$ as: \begin{equation*} \mathcal{B}_{Z\rightarrow4l} = \left(4.70 \pm 0.32 (\text{stat.}) \pm 0.21 (\text{sys.}) \pm 0.03 (\text{theo.}) \pm 0.14 (\text{lumi})\right)\times 10^{-6} . \end{equation*} Finally, a 95% confidence level CL$_s$ exclusion contour is set on modified Higgs coupling parameters ($c_t$, $c_g$) in a Higgs effective field theory

Measurement of Higgs production cross sections in the four lepton channel at 13 TeV with the ATLAS detector

The proton$-$proton collision data were produced at the Large Hadron Collider at a centre-of-mass energy of 13~TeV~and recorded by the ATLAS detector from 2015 to 2017, with an integrated luminosity of 79.8 fb$^{-1}$. In this talk, I will cover the measurement of production mode cross sections of the Higgs boson production under the Simplified template cross sections(STXS) in proton-proton collisions in the $H \to ZZ^{*} \to 4\ell$ decay channel. I will talk about the physical motivation, analysis design, some techniques and result. The measurements are in agreement with the Standard Model prediction

Measurements of Multi-Boson Productions Including Vector-Boson Fusion and Vector-Boson Scattering at ATLAS

The electroweak production of multi-boson processes are a powerful tool to probe the Standard Model. The processes are sensitive to gauge boson self-interactions, which is related to non-Abelian structure of the electroweak interactions. Such processes also offer discovery opportunities. In this talk the latest results are presented, including $ZZjj$, $Z\gamma jj$, and $WWW$ processes