Conveners
Parallel: BSM: 1
- Arely Cortes Gonzalez (Humboldt-Universität zu Berlin)
- Shankha Banerjee ()
Parallel: BSM: 2
- Christina Gao (University of Illinois Urbana Champaign)
- Davide Zuliani ()
- Jonathon Langford ()
Parallel: BSM: 3
- Arely Cortes Gonzalez (Humboldt-Universität zu Berlin)
- Shankha Banerjee (IMSc, Chennai)
Parallel: BSM: 4
- Arely Cortes Gonzalez (Humboldt-Universität zu Berlin)
- Shankha Banerjee ()
Parallel: BSM: 5
- Christina Gao (University of Illinois Urbana Champaign)
- Davide Zuliani ()
- Jonathon Langford (Imperial College London)
The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable of solely explaining some observations. Many extensions of the Standard Model addressing such shortcomings introduce additional Higgs-like bosons. The current status of...
Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV in the diphoton final state in proton-proton collisions at √s=13 TeV with CMS
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...
The CMS collaboration has reported the di-tau and also di-photon excesses with the local significance of $\approx 3\sigma$ levels where the invariant mass is m = 95–100 GeV. These excesses can be interpreted as a light scalar boson that couples to the third-generation fermions, particularly top and tau. Based on the simplest model that can account for the CMS di-tau excess, we evaluate...
Searches for additional Higgs bosons with mass above 125 GeV are presented, using the Run-2 data set collected by the CMS experiment. A variety of processes and final states (A->tautau/bb, Z* -> h/H A, A->Zh, ...) are discussed.
Search for light (within the mass range 84–200 GeV) doubly-charged Higgs bosons decaying into a pair of $W$-bosons has been deemed challenging using the conventional LHC searches with leptons, jets and missing transverse momentum in the final state. Such Higgses together with slightly heavier singly-charged and neutral Higgses, when arranged in an $SU(2)_L$ triplet as in the type-II see-saw...
Most of the current experimental searches for charged Higgs bosons at the Large Hadron Collider (LHC) concentrate upon the tb and τν decay channels. In the present study, we analyze instead the feasibility of the bosonic decay channel W±∗h, with the charged gauge boson being off-shell and h being a neutral light Higgs boson, which decays predominantly into b¯b. We perform a Monte Carlo (MC)...
In the Standard Model, one doublet of complex scalar fields is the minimal content of the Higgs sector in order to achieve spontaneous electroweak symmetry breaking. However, several theories beyond the Standard Model predict a non-minimal Higgs sector and introduce charged scalar fields that do not exist in the Standard Model. As a result, singly- and doubly-charged Higgs bosons would be a...
Searches are being carried out at the Large Hadron Collider (LHC) for the decay of the CP-odd scalar $(A^{0})$ in Two-Higgs-Doublet Models (2HDMs) with Natural Flavour Conservation (NFC) in the channel $A^{0}\rightarrow h^{0}Z^{*}$ (with $m_{h^{0}}=125 GeV$ and Z on-shell). In the absence of any signal, limits on the parameter space of $[tan\beta , cos(\beta -\alpha ), m_{A^{0}}]$in each 2HDM...
we would like to introduce our recent work about BSM Higgs searches at LHC, in the framework of 2HDM. The study will include both the neutral and charged Higgs studies. including various BSM Higgs production and decay channels, as well as the exotic Higgs decays.
We present CMS searches for exotic decays of the Higgs boson with the CMS experiment. Searches where the 125 GeV Higgs boson decays into two low-mass scalars are discussed. We also present searches for the 125 GeV Higgs boson decaying to a Z boson and a light scalar.
Full one-loop QCD and electroweak corrections to the Higgs-starhlung process at the LHC, $pp \to W^{\pm} H, ZH$ in the inert doublet model (IDM) are studied. Taking all available constraints on the parameter space of the IDM, we consider the case where the IDM qualifies as a good dark matter (DM) candidate within the freeze-out mechanism and the case where DM constraints are not imposed, hence...
Searches for dark matter in final states with invisible particles recoiling against a Higgs boson are presented. Various final states, topologies and kinematic variables are explored. In this talk, we focus on the recent CMS results obtained using the full Run-II dataset collected at the LHC.
Weakly-Interacting Massive Particle (WIMP), a strong candidate for dark matter (DM), faces the dilemma of being severely constrained by DM direct detection experiments when trying to explain DM relic abundance.
One WIMP model that avoids this dilemma is the pseudo-Nambu-Goldstone dark matter model (pNGB DM model). The pNGB DM requires explicit global symmetry breaking, but all realistic and...
Unsatisfied with model-building opportunities offered by the 2HDM or singlet extensions, many researchers turn to more elaborate Higgs sectors. 3HDMs offer to a bSM model-builder many novel options absent in the 2HDM. One of them is CP4, the CP symmetry of order 4, physically distinct from the usual CP. Imposing CP4 on the 3HDM leads to remarkable connections between the scalar and Yukawa...
CP4 3HDM is a three-Higgs-doublet model based on the CP symmetry of order 4 (CP4) without any accidental symmetries. Imposing CP4 leads to remarkable connections between the scalar and Yukawa sectors and unavoidably generates tree-level Lepton Flavor-Violation (LFV). It remains unclear whether LFV can be sufficiently suppressed in the CP4 3HDM. Here we explore which CP4-invariant scenarios can...
Multi-Higgs-doublet models equipped with global symmetry groups, either exact or softly bro- ken, offer a rich framework for constructions beyond the Standard Model and lead to remarkable phenomenological consequences. Knowing all the symmetry options within each class of models can guide its phenomenological exploration, as confirmed by the vast literature on the two- and three-Higgs-doublet...
It has been confirmed experimentally the existence of a mass gap between Standard Model and eventual New Physics states. Consequently, the use of effective approaches to search for signals of Physics Beyond the Standard Model is very engaging. We consider a non-linear realizations of the electroweak symmetry breaking, where the Higgs is a singlet with free couplings and the SM fields are also...
Assuming that the Higgs potential arises from a strong BSM sector and that this sector lies in the same universality class as non-perturbative QCD, we show that several model approaches to strongly coupled field dynamics (AdS/QCD, Nambu-Jona-Lasinio model, spectral sum rules) indicate on a possible existence of a Higgs-like scalar particle h’ with the mass near 0.5 TeV. We suggest also that...
In this talk, we present a novel model that extends the standard model (SM) by introducing a $SU(2)_L$ singlet vectorlike quark (VLQ) charged under an additional local $U(1)_d$ symmetry group, along with the associated gauge boson, known as the dark photon. Owing to the additional $U(1)_d$ charge, the model predicts a suppressed branching ratio for the VLQ in the standard modes, leading to an...
