• Volume 54, Issue 4

      April 2000,   pages  453-683

    • Foreword

      J M Kohli M Kaur

      More Details Fulltext PDF
    • Recent results from LEP

      A Gurtu

      More Details Abstract Fulltext PDF

      Recent results from the LEP collider at CERN are presented: on the identification of e+eW+W and the determination of the W mass and width and limits on its anomalous couplings; the search for the Standard Model and non-minimal Higgs; search for SUSY and other new particles. Fits to all electroweak data leading to predictions of the Higgs mass within the Standard Model are presented.

    • Baryogenesis

      U A Yajnik

      More Details Abstract Fulltext PDF

      Developments in understanding of baryogenesis are reviewed. We start with early motivations and the proposals in the context of GUTs. Next, the importance of the sphaleron solution and its implications are discussed. Studies of the Standard Model reveal that the latter has a Higgs structure incompatible with existence of observed B asymmetry. We then discuss a generic scenario for electroweak baryogenesis relying on bubble wall dynamics. We also summarise the status of the MSSM, and alternative scenarios utilising topological defects as the source of non-equilibrium behaviour and leptogenesis

    • Recent advances in lattice gauge theories

      R V Gavai

      More Details Abstract Fulltext PDF

      Recent progress in the field of lattice gauge theories is briefly reviewed for a nonspecialist audience. While the emphasis is on the latest and more definitive results that have emerged prior to this symposium, an effort has been made to provide them with minimal technicalities.

    • Higgs and SUSY searches at future colliders

      Rohini M Godbole

      More Details Abstract Fulltext PDF

      In this talk, I discuss some aspects of Higgs searches at future colliders, particularly comparing and contrasting the capabilities of LHC and next linear collider (NLC), including the aspects of Higgs searches in supersymmetric theories. I will also discuss how the search and study of sparticles other than the Higgs can be used to give information about the parameters of the minimal supersymmetric Standard Model (MSSM).

    • Large hadron collider physics program: Compact muon solenoid experiment

      J B Singh

      More Details Abstract Fulltext PDF

      The LHC physics program at CERN addresses some of the fundamental issues in particle physics and CMS experiment would concentrate on them. The CMS detector is designed for the search of Standard Model Higgs boson in the whole possible mass range. Also it will be sensitive to Higgs bosons in the minimal supersymmetric model and well adapted to searches for SUSY particles, new massive vector bosons, CP-violation in B-system, search for subtructure of quarks and leptons, etc. In the LHC heavy ion collisions the energy density would be well above the threshold for the possible formation of quark-gluon plasma.

    • Review of recent results in deep inelastic scattering

      D Indumathi

      More Details Abstract Fulltext PDF

      This talk gives a summary of recent results in deep inelastic lepton hadron scattering. This includes structure functions from inclusive measurements as well as fragmentation in semi-inclusive processes, mainly with respect to data from colliders such as HERA at DESY, and their associated phenomenology.

    • Understanding fields using strings: A review

      Sunil Mukhi

      More Details Abstract Fulltext PDF

      In addition to being a prime candidate for a fundamental unified theory of all interactions in nature, string theory provides a natural setting to understand gauge field theories. This is linked to the concept of ‘D-branes’: extended, solitonic excitations of string theory which can be studied using techniques of string theory and which support gauge fields localized along their world-volumes. It follows that the techniques of string theory can be very useful even for those particle physicists who are not specifically interested in unification and/or quantum gravity. In this talk I attempt to review how strings help us to understand fields. The discussion is restricted to 3+1 spacetime dimensions.

    • Quark gluon plasma

      C P Singh

      More Details Abstract Fulltext PDF

      Recent trends in the research of quark gluon plasma (QGP) are surveyed and the current experimental and theoretical status regarding the properties and signals of QGP is reported. We hope that the experiments commencing at relativistic heavy-ion collider (RHIC) in 2000 will provide a glimpse of the QGP formation.

    • Electromagnetic signals of quark gluon plasma

      Bikash Sinha

      More Details Abstract Fulltext PDF

      Successive equilibration of quark degrees of freedom and its effects on electromagnetic signals of quark gluon plasma are discussed. The effects of the variation of vector meson masses and decay widths on photon production from hot strongly interacting matter formed after Pb + Pb and S + Au collisions at CERN SPS energies are considered. It has been shown that the present photon spectra measured by WA80 and WA98 Collaborations can not distinguish between the formation of quark matter and hadronic matter in the initial state.

    • Recent results from CERN SPS experiments and the future heavy ion programme

      Y P Viyogi

      More Details Abstract Fulltext PDF

      We describe the important results from the recent experiments using lead beams at the CERN SPS. The results of the WA98 experiment, which has substantial Indian participation along with the photon multiplicity detector is described in some detail. Combining the preliminary results from various experiments looking at different signals of phase transition, one finds enough evidences to suggest that phase transition has taken place in nuclear collisions at the SPS. Future programme of heavy ion physics at the LHC is being greared around the ALICE experiment. This will comprise of detector subsystems capable of studying almost all the signals in the same event. The photon multiplicity detector will be an important component of the ALICE experiment, being a totally Indian contribution to ALICE.

    • Three flavour oscillation interpretation of neutrino data

      S Uma Sankar

      More Details Abstract Fulltext PDF

      I consider the mixing of the three active neutrino flavours and obtain the constraints on the parameters of this mixing from the solar, atmospheric and reactor neutrino data.

    • The solar neutrino problem

      Harrison B Prosper

      More Details Abstract Fulltext PDF

      I review the solar neutrino problem and what it has taught us about the Sun and fundamental physics.

    • Electroweak couplings of the τ lepton

      John Swain

      More Details Abstract Fulltext PDF

      The tau lepton is the heaviest known lepton and studies of its production and decay allow measurements of its couplings to the electroweak gauge bosons. In particular, sensitive tests of the idea of lepton universality are possible, with the hope that some light will be shed on not just the nature of the origin of mass, but also on why there seem to be three generations. The recent LEP results provide most of this experimental data, and very recently measurements of the anomalous magnetic and electric dipole moments of the tau have been performed. I present an overview of all these results, and discuss what this means in the framework of the Standard Model and attempts to go beyond it.

    • An overview of progress in string theory

      Janadeva Maharana

      More Details Abstract Fulltext PDF

      There has been many interesting developments in string theory in last couple of years. The purpose of this article is to present a brief account of the progress made in string theory. The two invited talks by S R Das and S Mukhi in this volume contain more detailed accounts of our understanding of black hole physics and the intimate connections between string theory and gauge theories.

    • Supersymmetric unification in the light of neutrino mass

      Charanjit S Aulakh

      More Details Abstract Fulltext PDF

      We argue that with the discovery of neutrino mass effects at super-Kamiokande there is a clear logical chain leading from the standard model through the MSSM and the recently developed minimal left right supersymmetric models with a renormalizable see-saw mechanism for neutrino mass to left right symmetric SUSY GUTS: in particular, SO(10) and SU(2)L × SU(2)R × SU(4)c. The progress in constructing such GUTS explicitly is reviewed and their testability/falsifiability by proton decay measurements emphasized.

    • Recent developments in high energy physics

      S N Ganguli

      More Details Abstract Fulltext PDF

      Recent results from experiments with solar, atmospheric and accelerator neutrinos are presented. Some of the important results from the LEP and TEVATRON colliders are summarised.

    • List of Participants

      More Details Abstract Fulltext PDF
  • 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.