• Mamta

      Articles written in Pramana – Journal of Physics

    • Self-interacting one-dimensional oscillators

      Mamta Vishwamittar

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      Energy eigenvalues and 〈x2n for the oscillators having potential energyV(x)=(ω2x2/2)+λ<x2r>x2s have been determined for various values ofλ, r, s andn using renormalized hypervirial-Padé scheme. In general, the results show an improvement over the findings of earlier workers. Variation of the evaluated quantities and of the renormalization parameter withλ, r, s andn has been discussed. In addition, this potential has been employed as an illustrative example of the applicability of alternative formalism of perturbation theory developed by Kim and Sukhatme (J. Phys.A25 647 (1992)).

    • Triviality bound on lightest Higgs mass in next to minimal supersymmetric model

      S R Choudhury Mamta Sukanta Dutta

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      We study the implication of triviality on Higgs sector in next to minimal supersymmetric model (NMSSM) using variational field theory. It is shown that the mass of the lightest Higgs boson in NMSSM has an upper bound ∼10MW which is of the same order as that in the standard model.

    • Probing anomalous Higgs couplings at an $e\gamma$ collider using unpolarised beams

      Debajyoti Choudhury Mamta

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      We examine the sensitivity of $e \gamma$ colliders (based on $e^{+} e^{-}$ linear colliders of c.m. energy 500 GeV) to the anomalous couplings of the Higgs to 𝑊-boson via the process $e^{-} \gamma \rightarrow \nu WH$. This has the advantage over $e^{+} e^{-}$ collider in being able to dissociate $WWH$ vertex from $ZZH$. We are able to construct several dynamical variables which may be used to constrain the various couplings in the $WWH$ vertex.

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