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Collected Works of Prof. Rajasekaran: Recent submissions

  • An algebra for ordered particles 
    Mishra A.K.; Rajasekaran G. (1995)
    We construct an algebra of creation and destruction operators for a system whose multiparticle states have the property that the permutation of coordinates is forbidden. Although this "null statistics" can be related to a ...
  • Quantum interference effects in a generalised Kaluza-Klein theory 
    Parthasarathy R.; Nagarajan R.; Rajasekaran G. (1987)
    The change in the phase of the wavefunction of a test particle in a (4+n)-dimensional Kaluza-Klein theory is computed. It is found to contain the gravitational and non-Abelian phase shifts separately and simultaneously.
  • e+e-→γ+2 jets as a test of quark charges 
    HE X.G.; Pakvasa S.; Rajasekaran G.; Rindani S.D. (1987)
    It is shown that angular distribution in e+e-→γ+2 jets can serve as a possible test of quark charges but only above color threshold. © 1987.
  • An SO(10) GUT with see-saw masses for all fermions 
    Desai B.R.; Rajasekaran G.; Sarkar U. (2005)
    We propose an SO(10) grand unified theory in which all fermions acquire see-saw masses. We include only two Higgs scalars, a 210-plet and a 16-plet. In addition to the regular fermions we include one singlet per generation, ...
  • New forms of quantum statistics 
    Mishra A.K.; Rajasekaran G. (Indian Academy of Sciences, Bangalore, 1992)
    We propose a new two-parameter deformation of the algebra of creation and destruction operators, which allows the construction of a new family of Hillbert spaces with positive definite inner product. This provides a ...
  • Seesaw fermion masses in an SO(10) grand unified theory 
    Bhattacharya K.; Sarkar U.; Das C.R.; Rajasekaran G.; Desai B.R. (2006)
    In this work we study an SO(10) GUT model with minimum Higgs representations belonging only to the 210 and 16 dimensional representations of SO(10). We add a singlet fermion S in addition to the usual 16 dimensional ...
  • Three flavor implications of the result of the CHOOZ Collaboration 
    Narayan M.; Rajasekaran G.; Sankar S.U. (American Institute of Physics Inc., 1998)
    We analyze the recent result of the CHOOZ Collaboration in the context of mixing and oscillations between all the three neutrino flavors. If one assumes the hierarchy among the vacuum mass eigenvalues δ21≪δ31 where δ21=μ22-μ21 ...
  • Atmospheric neutrinos with three flavor mixing 
    Narayan M.; Rajasekaran G.; Sankar S.U. (1997)
    We analyze the atmospheric neutrino data in the context of three flavor neutrino oscillations taking account of the matter effects in the Earth. With the hierarchy among the vacuum mass eigenvalues [Formula presented], the ...
  • Constraints on mixing angles of Majorana neutrinos 
    Adhikari R.; Rajasekaran G. (2000)
    By combining the inputs from the neutrinoless double beta decay and the fits of cosmological models of dark matter with solar and atmospheric neutrino data, we obtain constraints on two of the mixing angles of Majorana ...
  • Radiative stability of neutrino-mass textures 
    Parida M.K.; Das C.R.; Rajasekaran G. (Indian Academy of Sciences, Bangalore, 2004)
    Neutrino-mass textures proposed at high scales are known to be unstable against radiative corrections especially for nearly degenerate mass eigenvalues. We find a mechanism in a class of gauge models including 2HDM where ...
  • Erratum: Algebra for fermions with a new exclusion principle 
    Mishra A.K.; Rajasekaran G. (Indian Academy of Sciences, Bangalore, 1991)
    [No abstract available]
  • Threshold effects on quasidegenerate neutrinos with high-scale mixing unification 
    Mohapatra R.N.; Parida M.K.; Rajasekaran G. (American Physical Society, 2005)
    We consider threshold effects on neutrino masses and mixings in a recently proposed model for understanding large solar and atmospheric mixing angles using radiative magnification for the case of quasidegenerate neutrinos. ...
  • A new mechanism for neutrino mass 
    Divakaran P.P.; Rajasekaran G. (World Scientific Publishing Co. Pte Ltd, 1999)
    A mechanism for generating massive but naturally light Dirac neutrinos is proposed. It involves composite Higgs within the standard model as well as some new interaction beyond the standard model. According to this scenario, ...
  • Time-of-night variation of solar neutrinos 
    Narayan M.; Rajasekaran G.; Sinha R. (World Scientific Publishing Co. Pte Ltd, 1998)
    We investigate the time-of-night variation of solar neutrino rate which will be of relevance to super-Kamioka and Sudbury neutrino detectors in the framework of oscillations among the three flavors. An analytical method ...
  • Neutrinos from stellar collapse: Comparison of the effects of three and four flavor mixings 
    Dutta G.; Indumathi D.; Murthy M.V.N.; Rajasekaran G. (2000)
    We study the effect of non-vanishing masses and mixings among neutrino flavors on the detection of neutrinos from stellar collapse by a water Cherenkov detector. We consider a framework in which there are four neutrino ...
  • Three inequivalent mass-degenerate Majorana neutrinos and a scenario of their splitting for neutrino oscillations 
    Adhikari R.; Ma E.; Rajasekaran G. (2000)
    The mass matrix of three Majorana neutrinos of equal mass is not necessarily proportional to the identity matrix, but expressible in terms of two angles and one phase. We discuss how such a mass matrix may be stable or ...
  • Neutrinos from stellar collapse: Comparison of signatures in water and heavy water detectors 
    Dutta G.; Indumathi D.; Murthy M.V.N.; Rajasekaran G. (American Physical Society, 2001)
    Signatures of neutrino and antineutrino signals from stellar collapse in heavy water detectors are contrasted . with those in water detectors. The effects of mixing, especially due to the highly dense matter in the supernova ...
  • Light sterile neutrinos from large extra dimensions 
    Ma E.; Rajasekaran G.; Sarkar U. (2000)
    An experimentally verifiable Higgs-triplet model of neutrino masses from large extra dimensions was recently proposed. We extend it to accommodate a light sterile neutrino which also mixes with the three active neutrinos. ...
  • New "square root" model of lepton family cyclic symmetry 
    Ma E.; Rajasekaran G. (American Physical Society, 2003)
    Following the newly formulated notion of form invariance of the neutrino mass matrix, a complete model of leptons is constructed. It is based on a specific unitary 3×3 matrix U in family space, such that U2 is the simple ...
  • Light unstable sterile neutrino 
    Ma E.; Rajasekaran G. (American Physical Society, 2001)
    The three massless active (doublet) neutrinos may mix with two heavy and one light sterile (singlet) neutrino so that the induced masses and mixings among the former are able to explain the present data on atmospheric and ...

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