Conveners
Physics Beyond the Standard Model: Physics Beyond the Standard Model
- Rachid Mazini (Academia Sinica, Taiwan)
Physics Beyond the Standard Model: Physics Beyond the Standard Model
- Rachid Mazini (Academia Sinica, Taiwan)
Many theories beyond the Standard Model (BSM) have been proposed to address several of the Standard Model shortcomings, such as the origin of dark matter and neutrino masses, the fine-tuning of the Higgs Boson mass, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these BSM extensions predict new particles or interactions directly accessible at the...
A search for non-resonant Higgs boson pair (𝐻𝐻) production is presented, in which one of the Higgs bosons decays to a b-quark pair (𝑏̄𝑏) and the other decays to 𝑊𝑊∗, or 𝑍𝑍∗, or 𝜏+𝜏− , with in each case a final state with 𝑙𝑙 + neutrinos (𝑙 = 𝑒, 𝜇). Both gluon-gluon fusion and vector boson fusion are considered as production modes. Data recorded by the ATLAS detector in proton-proton collisions...
The axion particle discovery could answer the big CP problem as it is hypothetically predicted. Hence A study on the exotic decay of the Higgs boson to two Axion Like Particles (ALPs), which in turn decay to two photons, was carried out. This analysis covers the mass range of ALPs between 100 MeV and 60 GeV and ALPs-photon couplings C$_{a\gamma\gamma}$ of 10$^{-5}$ to 1, a region that includes...
Many extensions to the Standard Model (SM) introduce a hidden or a dark sector rising from an additional U(1)d gauge symmetry, to provide candidates for dark matter in the universe and a possible explanation to astrophysical observations such as the positron excess observed in the cosmic radiation flux. The gauge boson of the dark sector would be either a massless or a massive dark photon that...
First Physics Results from the FASER Experiment with LHC Run 3 Data
-on behalf of the FASER Collaboration
FASER, an experiment at the LHC, was designed to explore the existence of light, weakly interacting particles that are generated in proton-proton collisions at the ATLAS interaction point and travel in the far-forward direction. The initial data analysis focused on two searches:...
We suggest an explanation for and explore the consequences of the excess around 95 GeV in the di-photon and di-tau invariant mass distributions recently reported by the CMS collaboration at the Large Hadron Collider (LHC), together with the discrepancy that has long been observed at the Large Electron-Positron (LEP) collider in the $b\bar b$ invariant mass. Interestingly, the most recent...
In search of beyond standard model, several hints of the presence of a new state at about 95 GeV have recently been observed by both the ATLAS and CMS collaborations based on their full Run 2 data sets. This result becomes particularly intriguing when considering another excess reported by CMS in the di-tau final state at a comparable mass, which exhibits a similar local significance....
Gravitons are hypothetical particles that have yet to be directly observed, but they are predicted by various theories, including quantum gravity. One quantum mechanical process that allows for the production of particles that couple to photons, such as gravitons, is light-by-light scattering. While rare, this process can be observed and is sensitive to potential new physics beyond the...
We study the one-loop prediction for the single production of the Standard Model (SM) Higgs boson ($h_1$) in association with a photon in electron-positron collision in the context of the Two Higgs Doublet Type II seesaw Model (THDMcT). This type of process is directly sensitive to one-loop impacts because it has no amplitude at the tree level. The cross section in the standard model (SM) is...
