• G Bhamathi

      Articles written in Pramana – Journal of Physics

    • Double hypernuclei and the ΛΛ interaction

      G Bhamathi K Prema Indumathi Seshadri

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      The double hypernuclei$$ \wedge \wedge He^6 $$ and$$ \wedge \wedge Be^{10} $$ have been analysed using purely attractive nonlocal separable potential. These double hypernuclei have been considered as three body (Λ+Λ+α) and four body (Λ+Λ+α+α) systems respectively. A consistent description of both the systems has been obtained for an intrinsic rangeb=1.5 fm of the ΛΛ interaction in the1S0 state. For the purely attractive Yukawa potential this corresponds to the two pion exchange range. The strength of the ΛΛ interaction deduced from the double hypernuclei was found insufficient to bind the two body ΛΛ system. The lightest double hypernucleus that is expected to be bound is$$ \wedge \wedge He^5 $$. The heavier double hypernuclei$$ \wedge \wedge C^{14} $$ and$$ \wedge \wedge O^{18} $$ have also been analysed. The binding energies obtained are in reasonable agreement with those of earlier workers.

    • $$N\bar N$$ resonance and the corrections to the Goldberger-Treiman relationresonance and the corrections to the Goldberger-Treiman relation

      G Bhamathi Sekhar Raghavan

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      The relevance of the recent experimental observation of possible bound and resonant states in$$N\bar N$$ scattering to the Goldberger-Treiman (GT) relation is examined. It is pointed out that anS-wave resonance in$$N\bar N$$ scattering goes a long way towards accounting for the corrections to the GT relations. Values of the mass and width of the resonance capable of giving a reasonable fit for the GT relation are presented.

    • On light supernuclei

      G Bhamathi K Prema

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      The possible existence of charmed analogues of the YN and light hypernuclear systems are investigated using phenomenological one-boson-exchange potential and the SU(4) symmetry. Bound light supernuclei such as C1N (I=3/2, J=0) and C1NN(I=2, J=1/2) C0NN (I=1, J=1/2, and I=0, J=1/2 or 3/2) are predicted with reasonable binding energies using Faddeev formalism for the three body systems.

    • On the mass spectroscopy of charmed multiquark hadrons

      G Bhamathi K Prema A Ramachandran

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      The possible existence of charmed multiquark hadrons are investigated using phenomenologicalmit bag model and the SU(4) flavour symmetry. The masses of 6q, 9q and 15q systems having the same quantum numbers as the physically interesting ordinary nuclei, hypernuclei and supernuclei are estimated. We find that several new states with distinct signatures are predicted.

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