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Search: authors:"Debtosh Chowdhury"

8 papers found.
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Update of global Two-Higgs-Doublet model fits

Abstract We perform global fits of Two-Higgs-Doublet models with a softly broken ℤ2 symmetry to recent results from the LHC detectors CMS and ATLAS, that is signal strengths and direct search limits obtained at \( \sqrt{s}=8 \) TeV and \( \sqrt{s}=13 \) TeV. We combine all available ATLAS and CMS constraints with the other relevant theoretical and experimental bounds and present...

Global fits of the two-loop renormalized Two-Higgs-Doublet model with soft Z 2 breaking

We determine the next-to-leading order renormalization group equations for the Two-Higgs-Doublet model with a softly broken Z 2 symmetry and CP conservation in the scalar potential. We use them to identify the parameter regions which are stable up to the Planck scale and find that in this case the quartic couplings of the Higgs potential cannot be larger than 1 in magnitude and...

Muon g − 2 in anomaly mediated SUSY breaking

Motivated by two experimental facts, the muon g − 2 anomaly and the observed Higgs boson mass around 125 GeV, we propose a simple model of anomaly mediation, which can be seen as a generalization of mixed modulus-anomaly mediation. In our model, the discrepancy of the muon g − 2 and the Higgs boson mass around 125 GeV are easily accommodated. The required mass splitting between...

Next-to-leading order unitarity fits in Two-Higgs-Doublet models with soft ℤ 2 breaking

We fit the next-to-leading order unitarity conditions to the Two-Higgs-Doublet model with a softly broken ℤ 2 symmetry. In doing so, we alleviate the existing uncertainty on how to treat higher order corrections to quartic couplings of its Higgs potential. A simplified approach to implementing the next-to-leading order unitarity conditions is presented. These new bounds are then...

Same sign di-lepton candles of the composite gluons

Composite Higgs models, where the Higgs boson is identified with the pseudo-Nambu-Goldstone-Boson (pNGB) of a strong sector, typically have light composite fermions (top partners) to account for a light Higgs. This type of models, generically also predicts the existence of heavy vector fields (composite gluons) which appear as an octet of QCD. These composite gluons become very...

Explaining the lepton non-universality at the LHCb and CMS within a unified framework

The recent results from the LHCb in the context of (B + → K + ll) decay and the CMS analysis in the context of right handed W-boson (W R ) search show a 2.6σ and a 2.8σ deviations from the Standard Model expectations respectively. In this work, we address these two seemingly uncorrelated results in the context of \( \mathrm{\mathcal{R}} \)-parity violating supersymmetry. We found...

Charge and color breaking constraints in MSSM after the Higgs discovery at LHC

We revisit the constraints on the parameter space of the Minimal Supersymmetric Standard Model (MSSM), from charge and color breaking minima in the light of information on the Higgs from the LHC so far. We study the behavior of the scalar potential keeping two light sfermion fields along with the Higgs in the pMSSM framework and analyze the stability of the vacuum. We find that...