Pramana (PRAMANA-J PHYS)

Journal description

Pramana - Journal of Physics is a monthly research journal in English published by the Indian Academy of Sciences in collaboration with Indian National Science Academy and Indian Physics Association. The journal publishes refereed papers covering current research in Physics, both original contributions - research papers, brief reports or rapid communications - and invited reviews. Pramana also publishes special issues devoted to advances in specific areas of Physics and proceedings of select high quality conferences.

Impact Factor Rankings

2016 Impact Factor Available summer 2017 0.649 0.72 0.562 0.575 0.561 0.349 0.274 0.383 0.417 0.38 0.301 0.333 0.324 0.283 0.314 0.278 0.284 0.34 0.354 0.349 0.345 0.383 0.39

Impact factor over time

Impact factor
.
Year

5-year impact 0.62 8.00 0.10 0.00 0.18 Pramana - Journal of Physics website Pramāṇa (Online), Epramana, Pramāṇa, journal of physics 0304-4289 51300167 Document, Periodical, Internet resource Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

• Pre-print
• Author can archive a pre-print version
• Post-print
• Author cannot archive a post-print version
• Conditions
• Publisher's version/PDF must be used
• On author's personal website and/or institutional repository
• All titles are open access journals
• Classification
green

Publications in this journal

• Article: Exact solutions of certain nonlinear chemotaxis diffusion reaction equations
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ABSTRACT: Using the auxiliary equation method, we obtain exact solutions of certain nonlinear chemotaxis diffusion reaction equations in the presence of a stimulant. In particular, we account for the nonlinearities arising not only from the density-dependent source terms contributed by the particles and the stimulant but also from the coupling term of the stimulant. In addition to this, the diffusion of the stimulant and the effect of long-range interactions are also accounted for in the constructed coupled differential equations. The results obtained here could be useful in the studies of several biological systems and processes, e.g., in bacterial infection, chemotherapy, etc.
No preview · Article · Feb 2016 · Pramana
• Article: Periodic and solitary wave solutions of cubic–quintic nonlinear reaction-diffusion equation with variable convection coefficients
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ABSTRACT: Attempts have been made to explore the exact periodic and solitary wave solutions of nonlinear reaction diffusion (RD) equation involving cubic–quintic nonlinearity along with time-dependent convection coefficients. Effect of varying model coefficients on the physical parameters of solitary wave solutions is demonstrated. Depending upon the parametric condition, the periodic, double-kink, bell and antikink-type solutions for cubic–quintic nonlinear reaction-diffusion equation are extracted. Such solutions can be used to explain various biological and physical phenomena.
No preview · Article · Feb 2016 · Pramana
• Article: Scattering chamber facility for double-differential cross-section measurement with 14 MeV DT neutron generator at IPR
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ABSTRACT: Measurement of double-differential cross-sections of 14 MeV neutron-induced charged-particle productions is very important for estimating the nuclear heating and radiation damage of a fusion reactor. Only a few experimental data are available even though the nuclear reaction cross-section data of structural materials are important in fusion nuclear technology. In this context, general purpose scattering chamber facility has been developed for accelerator-based 14 MeV DT neutron generator to measure double-differential nuclear reaction cross-section at Fusion Neutronics Laboratory, IPR. It has been designed for experiments using silicon surface barrier detectors for the online detection of charged particles. It offers flexibility in the arrangement of silicon surface barrier detectors.
No preview · Article · Feb 2016 · Pramana
• Article: On separation of exchange term from the coefficient of the magnetoelectromechanical coupling
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ABSTRACT: The purpose of this analysis is to introduce the separated exchange coefficient and to graphically investigate it. This coefficient, depending on the electromagnetic constant plus two coefficients of the electromechanical and magnetomechanical couplings, form the coefficient of magnetoelectromechanical coupling (CMEMC), a very important characteristic used for analysing magnetoelectroelastic smart (composite) materials. It was analytically and graphically demonstrated that the CMEMC can have a minimum due to the minimum of the exchange coefficient at a certain value of the electromagnetic constant. For graphical investigation, the frequently used transversely isotropic (6mm) composite materials such as BaTiO 3–CoFe 2O 4 and PZT–5H–Terfenol–D are exploited.
No preview · Article · Feb 2016 · Pramana
• Article: Is the size of θ 13 related to the smallness of the solar mass splitting?
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ABSTRACT: θ 13 is small compared to the other neutrino mixing angles. The solar mass splitting is about two orders smaller than the atmospheric splitting. We indicate how both could arise from a perturbation of a more symmetric structure. The perturbation also affects the solar mixing angle and can tweak alternate mixing patterns such as tribimaximal, bimaximal, or other variants to viability. For real perturbations only normal mass ordering with the lightest neutrino mass less than 10−2 eV can accomplish this goal. Both mass orderings can be accommodated by going over to complex perturbations if the lightest neutrino is heavier. The CP-phase in the lepton sector, fixed by θ 13 and the lightest neutrino mass, distinguishes different options.
No preview · Article · Jan 2016 · Pramana
• Article: Constraining the lightest neutrino mass and m ee from general lepton mass matrices
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ABSTRACT: Despite spectacular advances in fixing the neutrino mass and mixing parameters through various neutrino oscillation experiments, we still have little knowledge about the magnitudes of some vital parameters in the neutrino sector such as the absolute neutrino mass scale, effective Majorana mass m ee measured in neutrinoless double beta decay. In this context, the present work aims to make an attempt to obtain some bounds for m ee and the lightest neutrino mass using fairly general lepton mass matrices in the Standard Model.
No preview · Article · Jan 2016 · Pramana
• Article: Twin-unified SU(5) × SU(5)′ GUT and phenomenology
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ABSTRACT: In this article, after a short introduction, grand unified S U(5)×S U(5)′ model augmented by D 2 parity has been discussed. The latter turns out to be important for phenomenology. Specific pattern of the GUT symmetry breaking causes new strong dynamics at low energies. Consequently, the Standard Model leptons, along with right-handed /sterile neutrinos, come out as composite states. Issues of the gauge coupling unification, generation of the charged fermion and neutrino masses will be presented. Also, various phenomenological implications and constraints will be discussed.
No preview · Article · Jan 2016 · Pramana
• Article: Inelastic surface vibrations versus energy-dependent nucleus–nucleus potential in sub-barrier fusion dynamics of 3 6 Li + 62 144 Sm ${~}_{\boldsymbol {3}}^{\boldsymbol {6}} \text {Li}\boldsymbol {+}{~}_{\hspace *{6pt}\boldsymbol {62}}^{\boldsymbol {144}} \text {Sm}$ system
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ABSTRACT: Limitations of the static Woods–Saxon potential and the applicability of the energy-dependent Woods–Saxon potential (EDWSP) model within the framework of one-dimensional Wong formula to explore the sub-barrier fusion data are highlighted. The inelastic surface excitations of the fusing nuclei are found to be dominating in the enhancement of sub-barrier fusion excitation function data and the effects of such dominant vibrational states are exploited through the coupled channel calculations obtained by using the code CCFULL. It is worth mentioning here that the influence of multiphonon vibrational states of the reactants can be simulated by introducing the energy dependence in the nucleus–nucleus potential.
No preview · Article · Jan 2016 · Pramana
• Article: A novel four-wing non-equilibrium chaotic system and its circuit implementation
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ABSTRACT: In this paper, we construct a novel, 4D smooth autonomous system. Compared to the existing chaotic systems, the most attractive point is that this system does not display any equilibria, but can still exhibit four-wing chaotic attractors. The proposed system is investigated through numerical simulations and analyses including time phase portraits, Lyapunov exponents, bifurcation diagram, and Poincaré maps. There is little difference between this chaotic system without equilibria and other chaotic systems with equilibria shown by phase portraits and Lyapunov exponents. But the bifurcation diagram shows that the chaotic systems without equilibria do not have characteristics such as pitchfork bifurcation, Hopf bifurcation etc. which are common to the normal chaotic systems. The Poincaré maps show that this system is a four-wing chaotic system with more complicated dynamics. Moreover, the physical existence of the four-wing chaotic attractor without equilibria is verified by an electronic circuit.
No preview · Article · Jan 2016 · Pramana
• Article: Z 0 / γ ∗ +Jet via electron decay mode at s = $\boldsymbol {\sqrt {s}=}$ 7 TeVin CMS@LHC
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ABSTRACT: The area-normalized angular distributions in events containing a Z 0 boson and a jet, using the electron decay mode, are presented. The data samples correspond to 5 fb −1 of proton–proton collisions at $$\sqrt {s}=7$$ TeV, collected by the CMS detector. Events in which there is a Z boson and at least one jet, with a jet transverse momentum threshold of 30 GeV /c and absolute jet rapidity less than 2.4, are selected for this analysis. We compare our measurements with a next-to-leading order perturbative QCD calculation and two generators that combine tree-level matrix element calculations with parton showers.
No preview · Article · Jan 2016 · Pramana
• Article: Interplay between grand unification and supersymmetry in SU(5) and E 6
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ABSTRACT: Some aspects of minimal supersymmetric renormalizable grand unified theories are reviewed here. These include some constraints on the model parameters from the Higgs and light fermion masses in SU(5), and the issues of symmetry breaking, doublet–triplet splitting and fermion masses in E 6.
No preview · Article · Jan 2016 · Pramana
• Article: Kalb–Ramond fields and the CMBR
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ABSTRACT: Cosmological implications on the polarization of the cosmic microwave background radiation, of a Kalb–Ramond field interacting with gauge fields and gravity as dictated by quantum consistency of heterotic string theory are surveyed. A parity violating augmentation going beyond the dictates of string theory is shown to lead to possible appearance of a B mode generated in the cosmic microwave background (CMB) in the post-last scattering epoch. This generation of the B mode of CMB appears to be dramatic when the augmentation is embedded within a Randall–Sundrum braneworld scenario of the first kind.
No preview · Article · Jan 2016 · Pramana
• Article: Neutrino mass bounds from neutrinoless double beta-decays and cosmological probes
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ABSTRACT: We investigate the way the total mass sum of neutrinos can be constrained from the neutrinoless double beta-decay and cosmological probes with cosmic microwave background (CMBR), large-scale structures including 2dFGRS and SDSS datasets. First we discuss, in brief, the current status of neutrino mass bounds from neutrino beta decays and cosmic constraint within the flat ΛCMD model. In addition, we explore the interacting neutrino dark-energy model, where the evolution of neutrino masses is determined by quintessence scalar field, which is responsible for cosmic acceleration. Assuming the flatness of the Universe, the constraint we can derive from the current observation is $$\sum m_{\nu } < 0.87$$ eV at 95% confidence level, which is consistent with $$\sum m_{\nu } < 0.68$$ eV in the flat ΛCDM model without Lyman alpha forest data. In the presence of Lyman- α forest data, interacting dark-energy models prefer a weaker bound $$\sum m_{\nu } < 0.43$$ eV to $$\sum m_{\nu } < 0.17$$ eV (Seljark et al). Finally, we discuss the future prospect of the neutrino mass bound with weak-lensing effects.
No preview · Article · Jan 2016 · Pramana
• Article: Inclusive decays of B-meson to J/ψ and χ c1 using 386 × 1 0 6 B B ̄ $\boldsymbol {386\times 10^{6} B\bar {B}}$ events
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ABSTRACT: The inclusive decays of B-mesons to charmonium have been studied in a data sample of 386 million $$B\bar {B}$$ events. The data sample has been collected by the Belle detector at the KEKB asymmetric energy e +e − collider operating at the Υ(4S) resonance. The branching fractions have been measured for the inclusive decays to J/ψ + X and χ c1 + X. The measured branching fraction for J/ψ + X is $$\mathcal {B}(B \to J/\psi (\to e^{+}e^{-})+X) = (1.10\pm 0.005\pm 0.057)\%$$ and $$\mathcal {B}(B\to J/\psi (\to \mu ^{+}\mu ^{-})+X) = (1.08\pm 0.004\pm 0.056)\%$$, while the inclusive χ c1 + X branching fraction is found to be $$\mathcal {B}(B\to \chi _{c1}+X) = (0.44\pm 0.01\pm 0.06)\%$$. The feed-down contribution from higher charmonium states is subtracted from the measured branching fractions and the direct branching fractions are obtained to be $$\mathcal {B}(B\to J/\psi +X) = (0.77\pm 0.04\pm 0.06)\%$$ and $$\mathcal {B}(B \to \chi _{c1}+X) = (0.41\pm 0.01\pm 0.06)\%.$$
No preview · Article · Jan 2016 · Pramana
• Article: Anomalous hydrodynamics in two dimensions
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ABSTRACT: A new approach is presented to discuss two-dimensional hydrodynamics with gauge and gravitational anomalies. Exact constitutive relations for the stress tensor and charge current are obtained. Also, a connection between response parameters and anomaly coefficients is discussed. These are new results which, in the absence of the gauge sector, reproduce the results found by the gradient expansion approach.
No preview · Article · Jan 2016 · Pramana
• Article: Neutrinos in the time of Higgs
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ABSTRACT: In this paper, the recent progress in the determination of neutrino oscillation parameters and future prospects have been discussed. The tiny neutrino masses as inferred from oscillation data and cosmology cannot be explained naturally by the Higgs mechanism and warrant some new physics. The latter can be connected to the Majorana nature of the neutrinos which can be probed by neutrinoless double beta decay (0 ν β β). The paper also summarizes the latest experimental results in 0 ν β β and discusses some implications for the left–right symmetric model which could be a plausible new physics scenario for the generation of neutrino masses.
No preview · Article · Jan 2016 · Pramana
• Article: Muon response in ICAL detector at India-based neutrino observatory
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ABSTRACT: The magnetized iron calorimeter (ICAL) detector, proposed to be built in the India-based neutrino observatory (INO) laboratory, aims to study atmospheric neutrino oscillations. A simulations study of response of muons to the ICAL detector is presented in the form of momentum reconstruction, angle resolution and reconstruction, and charge identification efficiency (CID).
No preview · Article · Jan 2016 · Pramana
• Article: Evidence for leptonic CP phase from NOνA, T2K and ICAL
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ABSTRACT: The phenomenon of neutrino oscillation is now well understood from the solar, atmospheric, reactor and accelerator neutrino experiments. This oscillation is characterized by a unitary PMNS matrix which is parametrized by three mixing angles (𝜃 12, 𝜃 23 and 𝜃 13) and one phase (δ CP) known as the leptonic CP phase. Neutrino oscillation also involves two mass squared differences: the solar mass square difference ($${\Delta }_{21} = {m_{2}^{2}} - {m_{1}^{2}}$$) and the atmospheric mass square difference ($${\Delta }_{31} = |{m_{3}^{2}} - {m_{1}^{2}}|$$). Though there is already significant amount of information about the three mixing angles, the CP phase is still unknown. Apart from the CP phase, one should also know what is the true nature of the neutrino mass hierarchy, i.e., normal (m 3>m 1: NH) or inverted (m 1>m 3: IH) and what is the true octant of 𝜃 23, i.e., lower (𝜃 23<45∘: LO) or higher (𝜃 23>45∘: HO). The long-baseline experiments (LBL) have CP sensitivity coming from the appearance channel ($$\nu _{\mu } \rightarrow \nu _{e}$$). On the other hand, atmospheric neutrinos are known to have negligible CP sensitivity. In this work, we study the synergy between the LBL experiment NOνA, T2K and the atmospheric neutrino experiment ICAL@INO for obtaining the first hint of CP violation in the lepton sector. We find that due to the lack of knowledge of hierarchy and octant, CP sensitivity of NOν A/T2K is poorer for some parameter ranges. Addition of ICAL data to T2K and NOνA can exclude these spurious wrong-hierarchy and /or wrong-octant solutions and cause a significant increase in the range of δ CP values for which a hint of CP violation can be achieved. Similarly, the precision with which δ CP can be measured also improves with the inclusion of ICAL data.
No preview · Article · Jan 2016 · Pramana
• Article: Inflation in the light of BICEP2 and PLANCK
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ABSTRACT: The BICEP2 /Keck + PLANCK joint analysis of the B-model polarization and polarization by foreground dust sets an upper bound on the tensor-to-scalar ratio of r 0.05 < 0.12 at 95% CL. The popular Starorbinsky model Higgs-inflation or the conformally equivalent Higgs-inflation model allow low r values (∼ 10−3). We survey the generalizations of the Starobinsky–Higgs models which would allow larger values (r ∼ 0.1). The Starobinsky–Higgs inflation models require an exponential potential which can be naturally derived from SUGRA models. We show that a variation of the no-scale SUGRA model can give rise to the generalized Starobinsky models which give large r. We also examine non-standard boundary conditions which would allow a large deviation of the tensor spectral index from the slow roll values and propose that the presence of a thermal component in the tensor spectrum arises from Gibbons–Hawking temperature of the de-Sitter space.
No preview · Article · Jan 2016 · Pramana