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Collected Works of Prof. Rajasekaran: Recent submissions

  • The recent single-tag two-photon experiments at petra and the issue of quark charges 
    Godbole R.M.; Pati J.C.; Rindani S.D.; Jayaraman T.; Rajasekaran G. (1984)
    The data of recent single-tag two-photon experiments indicating noticeable excess in (Rγγ)jet over fractionally charged quark-parton model-predictions is studied from the point of view of its implications on the gauge ...
  • A note on the annihilation of polarised e+e- beams into jets in the broken colour gauge theory 
    Lakshmibala S.; Rajasekaran G.; Rindani S.D. (1982)
    The dependence of angular distribution on polarisation for the processes of transverse or longitudinally polarised e+e- beams annihilating into two or three jets has been got from very general considerations. It is seen ...
  • Direct photon production in e+e- collisions 
    Jayaraman T.; Rajasekaran G.; Rindani S.D. (1985)
    We study the process e+e-+X as a possible test to distinguish between fractionally-charged-quark models and gauged integer-charged-quark models. We find that charge-asymmetry measurement in this process would not distinguish ...
  • Do the PETRA two-photon jet experiments rule out integrally charged quarks? 
    Jayaraman T.; Rajasekaran G.; Rindani S.D. (1982)
    The data on two-jet production in the PETRA single-tag two-photon experiments have been analyzed in the integer-charge quark model based on a spontaneously broken SU(3) colour gauge theory. The results show that the model ...
  • Large-N gauge theory of loops and strings. II 
    Bohr H.; Rajasekaran G. (1985)
    A QCD model that is constructed entirely in terms of gauge-invariant composite fields, i.e., Wilson loops and strings as a nonlocal SU(N) gauge theory, will be approximately solved in this article. A scattering theory is ...
  • Large-N gauge theory of loops and strings. I 
    Bohr H.; Rajasekaran G. (1985)
    A large-N gauge model is constructed entirely in terms of gauge-invariant composite fields. The model is formulated in a canonical framework where the Hamiltonian contains only the Wilson-loop and string operators and their ...
  • Erratum: Color gluon excitation at Fermilab 
    Rajasekaran G.; Roy P. (1976)
    [No abstract available]
  • Neutral current cross-sections for neutrinos on protons 
    Rajasekaran G.; Sarma K.V.L. (Indian Academy of Sciences, Bangalore, 1978)
    Defining the ratios rp =σ(vp →vx)/σ(vp →μ- x) and {Mathematical expression} we obtain the bounds 0.28 ≤rp ≤ 0.61 and {Mathematical expression} using only the parton model and the data of CDHS group with iron target. We ...
  • Effect of gluons on neutral-current interactions in deep inelastic neutrino scattering 
    Rajasekaran G.; Roy P. (Indian Academy of Sciences, Bangalore, 1975)
    The contribution of neutral spin-1 gluons to the deep inelastic neutral-current processes v(v)+N→v(v)+ hadrons is worked out in the parton model. Such a contribution violates Bjorken scaling strongly. © 1975 the Indian ...
  • Fields with vanishing colour-currents 
    Rajasekaran G.; Srinivasan V.; Ram M.S.S. (Springer India, 1985)
    We consider spinor, scalar and vector fields with colour degrees of freedom and find the classical solutions when the constraint of vanishing colour currents is imposed. We find that there are no non-trivial c-number ...
  • Radiative decays, photoproduction and total cross section of the ψ particles 
    Sarma K.V.L.; Rajasekaran G.; Pasupathy J. (Indian Academy of Sciences, Bangalore, 1976)
    It is pointed out that the coupling characterizing the ψ-γ vertex must change substantially between the limits, ψ on mass-shell which occurs in ψ→e+ e- and photon on mass-shell which is relevant in radiative decays like ...
  • Interpretation of the recent Kolar events 
    Joshipura A.S.; Rajasekaran G.; Gupta V.; Sarma K.V.L. (Indian Academy of Sciences, Bangalore, 1989)
    We give plausible interpretations of the unusual events seen in the proton decay detector at Kolar Gold Fields indicating the existence of a massive (≳2GeV) long lived (10-8-10-9s) particle. We show that it is possible to ...
  • Radiative magnification of neutrino mixings in split supersymmetry 
    Mohapatra R.N.; Parida M.K.; Rajasekaran G. (2005)
    Radiative corrections to neutrino mixings in seesaw models depend on the nature of new physics between the weak and the grand unified theory (GUT)-seesaw scales and can be taken into account using the renormalization group ...
  • Phenomenology of neutrino oscillations 
    Rajasekaran G. (Indian Academy of Sciences, Bangalore, 2000)
    The phenomenology of solar, atmospheric, supernova and laboratory neutrino oscillations is described. Analytical formulae for matter effects are reviewed. The results from oscillations are confronted with neutrinoless ...
  • Solar neutrinos and the eclipse effect 
    Narayan M.; Rajasekaran G.; Sinha R.; Burgess C.P. (1999)
    The solar neutrino counting rate in a real time detector such as Super-Kamiokanda, SNO, or Borexino is enhanced due to neutrino oscillations in the Moon during a partial or total solar eclipse. The enhancement is calculated ...
  • Hexagonal SU(3) unification and its manifestation at the TeV scale 
    Cao Q.-H.; Chen S.-L.; Ma E.; Rajasekaran G. (American Physical Society, 2006)
    We consider SU(3)C×SU(2)AL×SU(2)BL×U(1)Y as the low-energy subgroup of supersymmetric SU(3)6 unification. This may imply small deviations from quark-lepton universality at the TeV scale, as allowed by neutron-decay data. ...
  • Solar eclipse and neutrinos 
    Narayan M.; Rajasekaran G.; Sinha R. (1996)
    It is pointed out that due to neutrino oscillations the observed solar neutrino rate in the terrestrial neutrino detectors may be enhanced during a partial or total solar eclipse. The enhancement is calculated as a function ...
  • Solar and atmospheric neutrino oscillations with three flavors 
    Narayan M.; Murthy M.V.N.; Rajasekaran G.; Umasankar S. (1996)
    We analyze the solar and the atmospheric neutrino problems in the context of three flavor neutrino oscillations. We assume a mass hierarchy in the vacuum mass eigenvalues (formula presented), but make no approximation ...
  • Double threefold degeneracies for active and sterile neutrinos 
    Ma E.; Rajasekaran G. (2001)
    We explore the possibility that the three active (doublet) neutrinos have nearly degenerate masses which are split only by the usual seesaw mechanism from three sterile (singlet) neutrinos in the presence of a softly broken ...
  • Softly broken A4 symmetry for nearly degenerate neutrino masses 
    Ma E.; Rajasekaran G. (American Physical Society, 2001)
    The leptonic Higgs doublet model of neutrino masses is implemented with an A4 discrete symmetry (the even permutation of four objects or equivalently the symmetry of the tetrahedron) which has four irreducible representations: ...

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