• K Prema

      Articles written in Pramana – Journal of Physics

    • Double hypernuclei and the ΛΛ interaction

      G Bhamathi K Prema Indumathi Seshadri

      More Details Abstract Fulltext PDF

      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.

    • Symmetry breaking for theBBP-couplings

      Jatinder K Bajaj M P Khanna K Prema

      More Details Abstract Fulltext PDF

      Using the consistency requirements arising from the Coleman-Glashow null result for ‘tadpole’-type symmetry-breaking, we obtain a simple method of accounting for the SU(3) symmetry-breaking at theBBP-vertex, without introducing any new parameters. The results obtained are in excellent agreement with the available numbers. We extend the analysis to the charmed baryon couplings in order to accommodate SU(4)-breaking.

    • On light supernuclei

      G Bhamathi K Prema

      More Details Abstract Fulltext PDF

      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

      More Details Abstract Fulltext PDF

      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.

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.