Abstract

Subtleties of Einstein’s gravity would be exposed, in particularhow gravitational self interaction is incorporated in Einstein’s gravity?

Abstract

Abstract

The Higgs boson is believed to have been discovered at the Large HadronCollider.The task now is to verify whether the boson is indeed the scalar Higgs asproposedin the Standard Model of particle physics, or something more esoteric asproposedin the plethora of extensions to the Standard Model. We present a step bystepmethodology to determine the properties of this resonance without makinganyassumptions about its couplings. We present the analysis in terms ofmeasurementsthat would require the minimum number of events. We show that by studyingthe threeuni-angular distributions and other readily measurable observables, one canunambiguouslyconfirm whether the new boson is indeed the Higgs with J^{PC} = 0^{++} andwith couplingsto Z bosons exactly as predicted in the Standard Model.

Abstract

Neutrinos, “the most tiny quantity of reality ever imaginedby a human being”, as quoted by its co-discovererFrederick Reines, never ceased to puzzle physicists.Wolfgang Pauli introduced neutrino in 1930 as a desperateremedy to save the “law of conservation of Energy”. It thentook twenty seven long years to find the first experimentalevidence for its existence. The reason for this long wait isits extreme reluctance to interact with matter. Neutrino canpass through the earth, the sun or other astrophysical objectswithout much interaction. They interact at the best onlyone time over one billion in the huge apparatus built to detectthem. This particular property of neutrino however turnsout to be a blessing in disguise as it opens up a new windowto look at the interior of sun and other astrophysical objects.Over the last several decades, dedicated neutrino experimentsaround the globe have looked for neutrinos from the sun, fromouter space, from interior of the earth and from man made activities.These experiments have answered many of the questions relatedto particle physics, astrophysics and even geophysics.India has a long tradition in neutrino physics. In fact, the firstever cosmic ray produced neutrino was detected in an experimentin the deep mines of Kolar Gold Fields in 1965. India is againplanning to setup an experiment called India-Based NeutrinoObservatory (INO) to study some of the properties of neutrinos.In this talk I will describe few of these experiments and theirfindings. I will also discuss the INO experiment and its physicspotential.

Abstract

If the recently discovered new boson is confirmed to be a Higgsboson, thenstability of the electroweak vacuum in a minimal model with a universalextra dimension (mUED) willrequire a much lower cutoff for the theory than has been envisaged earlier.We show that this lowcutoff leads to important changes in much of the mUED phenomenology studiedtill now. In particular, prospects for LHC searches for n = 1, Kaluza Kleinstates are ratherlimited if conventional search strategies are used. We propose some newmethods which can overcome these difficulties.