Siksha ‘O’ Anusandhan University
Bhubaneshwar, India

Siksha O Anusandhan University is a Deemed to be university in Bhubaneswar, Odisha, India. It was designated to be a deemed university by the Ministry of Human Resource Development on 17 July 2007. Wikipedia.

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Awasthi R.L.,Harish Chandra Research Institute | Parida M.K.,Siksha ‘O’ Anusandhan University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012

Recently realization of TeV scale inverse seesaw mechanism in supersymmetric SO(10) framework has led to a number of experimentally verifiable predictions including low-mass WR± and Z ′ gauge bosons and nonunitarity effects. Using nonsupersymmetric SO(10) grand unified theory, we show how a TeV scale inverse seesaw mechanism for neutrino masses is implemented with a low-mass Z ′ boson accessible to Large Hadron Collider. We derive renormalization group equations for fermion masses and mixings in the presence of the intermediate symmetries of the model and extract the Dirac neutrino mass matrix at the TeV scale from successful grand unified theory-scale parametrization of fermion masses. We estimate leptonic nonunitarity effects measurable at neutrino factories and lepton flavor violating decays expected to be probed in the near future. While our prediction on the nonunitarity matrix element η μτ for degenerate right-handed neutrinos is similar to the supersymmetric SO(10) case, we find new predictions with significantly enhanced value of its phase δ μτ10 -4-10 -2 when partial degeneracy among these neutrino masses is adequately taken into account by a constraint relation that emerges naturally in this approach. Other predictions on branching ratios and CP-violating parameters are discussed. An important distinguishing characteristic as another test of the minimal model is that the threshold corrected two-loop prediction of the proton lifetime with maximum value (τ p) maxa1035yrs. is accessible to ongoing search experiments for the decay p→e +π0 in the near future. Simple model extensions with longer proton lifetime predictions are also discussed. © 2012 American Physical Society.

Heeck J.,Free University of Colombia | Patra S.,Max Planck Institute for Nuclear Physics | Patra S.,Siksha ‘O’ Anusandhan University
Physical Review Letters | Year: 2015

We show that left-right symmetric models can easily accommodate stable TeV-scale dark matter particles without the need for an ad hoc stabilizing symmetry. The stability of a newly introduced multiplet either arises accidentally as in the minimal dark matter framework or comes courtesy of the remaining unbroken Z2 subgroup of B-L. Only one new parameter is introduced: the mass of the new multiplet. As minimal examples, we study left-right fermion triplets and quintuplets and show that they can form viable two-component dark matter. This approach is, in particular, valid for SU(2)×SU(2)×U(1) models that explain the recent diboson excess at ATLAS in terms of a new charged gauge boson of mass 2 TeV. © 2015 American Physical Society. © 2015 American Physical Society.

Joshi R.K.,Siksha ‘O’ Anusandhan University
Molecular biotechnology | Year: 2012

Majority of the plant disease resistance genes expresses cytoplasmic receptor-like proteins characterized by an N-terminal nucleotide-binding site (NBS) and a leucine-rich repeat (LRR) domain. Degenerative primers based on these conserved motifs were used to isolate NBS type sequences in Kaempferia galanga. Cloning and sequencing identified 12 Kaempferia NBS-type sequences called resistance gene candidates (RGCs) classified into four classes. The amino acid sequences of the RGCs detected the presence of conserved domains, viz., kinase-1a, kinase-2, and hydrophobic GLPL, categorizing them with the NBS-LRR class gene family. Structural and phylogenetic characterization grouped the RGCs with the non-toll interleukin receptor (non-TIR) subclasses of the NBS sequences. Reverse transcription PCR with 10 Kaempferia RGC specific primers revealed 7 out of 10 Kaempferia RGCs to be expressive. The isolation and characterization of Kaempferia RGCs has been reported for the first time in this study. This will provide a starting point towards characterization of candidate resistance genes in Kaempferia and can act as a source pool for disease resistance development in other asexually reproducing plants.

Biswal M.,Silicon Institute of Technology | Dash P.K.,Siksha ‘O’ Anusandhan University
IEEE Transactions on Industrial Informatics | Year: 2013

This paper proposes a new scheme for measurement, identification, and classification of various types of power quality (PQ) disturbances. The proposed method employs a fast variant of S-Transform (ST) algorithm for the extraction of relevant features, which are used to distinguish among different PQ events by a fuzzy decision tree (FDT)-based classifier. Various single as well as simultaneous power signal disturbances have been simulated to demonstrate the efficiency of the proposed technique. The simulation result implies that the proposed scheme has a higher recognition rate while classifying simultaneous PQ faults, unlike other methods. The Fast dyadic S-transform (FDST) algorithm for accurate time-frequency localization, Decision Tree algorithms for optimal feature selection, Fuzzy decision rules to complement overlapping patterns, robust performance under different noise conditions and a relatively simple classifier methodology are the strengths of the proposed scheme. © 2013 IEEE.

Parida M.K.,Siksha ‘O’ Anusandhan University | Patra S.,Siksha ‘O’ Anusandhan University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2013

In TeV scale left-right symmetric models, new dominant predictions to neutrinoless double beta decay and light neutrino masses are in mutual contradiction because of large contribution to the latter through popular seesaw mechanisms. We show that in a class of left-right models with high-scale parity restoration, these results coexist without any contravention with neutrino oscillation data and the relevant formula for light neutrino masses is obtained via gauged inverse seesaw mechanism. The most dominant contribution to the double beta decay is shown to be via WL --WR - mediation involving both light and heavy neutrino exchanges, and the model predictions are found to discriminate whether the Dirac neutrino mass is of quark-lepton symmetric origin or without it. We also discuss associated lepton flavor violating decays. © 2012 Elsevier B.V.

Achary P.G.R.,Siksha ‘O’ Anusandhan University
SAR and QSAR in Environmental Research | Year: 2014

CORAL software has been used to build quantitative structure-activity relationships (QSARs) for the prediction of binding affinities (pEC50, i.e., minus decimal logarithm of the 50% effective concentration) of 35 potent inhibitors towards the voltage-gated potassium channel subunit Kv7.2. The pEC50 has been modelled using eight random splits, with the following representations of the molecular structure: (i) hydrogen-suppressed graph (HSG); (ii) simplified molecular input line entry system (SMILES); (iii) graph atomic orbitals (GAOs) and (iv) hybrid representation, which is HSG together with SMILES. These models have been examined using three methods, the classic scheme, balance correlation, and balance correlation with ideal slope. The QSAR model based on single optimal descriptors using SMILES provided the best accuracy for the prediction of the pEC50. The robustness of these models has been checked using parameters such as rm 2, r* m 2, and using a randomization technique. The best QSAR model based on single optimal descriptors has been applied to study the in vitro structure-activity relationships of pyrazolo[1,5-a]pyrimidin-7(4H)-one derivatives as Kv7.2 modulators. The pEC50 is found to be significantly increased by the incorporation of -OH, -NO2 or -Br groups in place of one -F, whereas -NH2 has a negative effect on the pEC50 values. © 2014 Taylor & Francis.

Patra S.,Siksha ‘O’ Anusandhan University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

We present an alternative formulation of the left-right symmetric theory where the scalar sector consists of two Higgs doublets. This formulation differs from the standard version of the left-right model that makes use of L- and R- Higgs triplets and a Higgs bidoublet. The basic idea is to consider a few extra charged isosinglet fields; the fermion masses can be realized by integrating out these heavy isosinglet fields. We also give a detailed discussion on neutrinoless double beta decay in this particular left-right symmetric theory where the right-handed (RH) Majorana neutrino can be of MeV range. With this RH Majorana mass around the MeV scale, the contribution to neutrinoless double beta decay coming from the right-handed current can be comparable to the contributions coming from the standard left-handed sector only if the right-handed gauge boson mass is around 5 TeV. With this operative scale of WR around a few TeV, it is possible to probe at the LHC. We have briefly commented on cosmological constraints from the big-bang nucleosynthesis and Universe cosmology on the RH neutrinos involved in this discussion. © 2013 American Physical Society.

Patra S.,Max Planck Institute for Nuclear Physics | Patra S.,Siksha ‘O’ Anusandhan University | Queiroz F.S.,Max Planck Institute for Nuclear Physics | Rodejohann W.,Max Planck Institute for Nuclear Physics
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2016

In canonical left-right symmetric models the lower mass bounds on the charged gauge bosons are in the ballpark of 3-4 TeV, resulting in much stronger limits on the neutral gauge boson ZR, making its production unreachable at the LHC. However, if one evokes different patterns of left-right symmetry breaking the ZR might be lighter than the WR± motivating an independent ZR collider study. In this work, we use the 8 TeV ATLAS 20.3 fb-1 luminosity data to derive robust bounds on the ZR mass using dilepton data. We find strong lower bounds on the ZR mass for different right-handed gauge couplings, excluding ZR masses up to ∼3.2 TeV. For the canonical LR model we place a lower mass bound of ∼2.5 TeV. Our findings are almost independent of the right-handed neutrino masses (∼2% effect) and applicable to general left-right models. © 2015 The Authors.

Pal S.S.,Siksha ‘O’ Anusandhan University
Journal of High Energy Physics | Year: 2013

We have obtained an expression of the entropy density depending on the scale transformation of the spatial directions in the field theory. It takes the following form in d + 1 dimensional bulk spacetime: s∼ T Hδ(d-1)-θ/z, where z and T H are the dynamical exponent and temperature in the field theory, respectively. θ is related to the scaling violation exponent, whereas δ gives us the information about the scaling behavior of the spatial field theoretic direction. This we demonstrate by finding solutions to the Einstein-DBI-dilaton system in generic spacetime dimensions. Upon restricting to d = 3, we show the linear temperature dependence of the specific heat and inverse quadratic temperature dependence of the resistivity for z = 2, θ = 0 and δ = 1, which resembles that of the Fermi-like liquid. Whereas for z = 2, θ = -2 and δ = 0 gives us a solution that is conformal to AdS 2 ⊠- R 2, which resembles with the non-Fermi-like liquid. Moreover, it shows the logarithmic violation of the entanglement entropy when the entangling region is of the strip type. © 2013 SISSA, Trieste, Italy.

Pal S.S.,Siksha ‘O’ Anusandhan University
Nuclear Physics B | Year: 2014

We have obtained the equation of the extremal hypersurface by considering the Jacobson-Myers functional and computed the entanglement entropy. In this context, we show that the higher derivative corrected extremal surfaces cannot penetrate the horizon. Also, we have studied the entanglement temperature and entanglement entropy for low excited states for such higher derivative theories when the entangling region is of the strip type. © 2014 The Authors.

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