With the start of the Large Hadron Collider (LHC) at CERN, Fermi Lab's physics program has shifted towards the intensity frontier from the energy frontier with a focus on the neutrino physics. Amongst others, Fermi Lab's current neutrino project includes NOvA, MicroBooNE, Minerva, MINOS+ and LArIAT. The NuMI beamline and the Booster Neutrino beamline deliver high intensity neutrino beams to Fermilab experiments such as MINOS+ and MINERvA, and for two new neutrino experiments MicroBooNE and NOvA. While we have learned a lot about the neutrino oscillation and their interaction with matter from the current generation of neutrino experiment, we still need to build future neutrino experimental facility to understand the phenomena such as CP violation in the leptonic sector, amongst others. With that goal in mind, the global neutrino physics community has come together to develop the Deep Underground Neutrino Experiment (DUNE), to be hosted at Fermi Lab.

IIT Guwahati is involved with the Nova and the DUNE experiments at Fermi Lab and this research programme is currently funded by DST-SERB (Mega Facilities for Basic Research).

The Belle experiment is a particle physics experiment conducted by the Belle Collaboration, an international collaboration of more than 400 physicists and engineers investigating CP-violation effects at the High Energy Accelerator Research Organisation (KEK) in Tsukuba, Japan. CP is the product of two fundamental symmetries in Particle Physics: C for charge conjugation, which transforms a particle into its antiparticle, and P for parity, which creates the mirror image of a physical system. The strong interaction and electromagnetic interaction seem to be invariant under the combined CP transformation operation, but this symmetry is slightly violated during certain types of weak decay. Historically, CP-symmetry was proposed to restore order after the discovery of parity violation in 1950s.

Belle, together with the BaBar experiment at SLAC, USA established the existence of CP violation in the b-quark mesons which is in agreement with the prediction of Kobayashi and Maskawa (KM) mechanism in the Standard Model.

The contributions of the Belle and BaBar experiments to our understanding of the Universe are well recognized. The 2008 Nobel Prize in Physics was awarded to Kobayashi, Maskawa and Nambu for their work on symmetry breaking and CP violation. Understanding the origins of CP violation is one of the primary goals of the experimental programs of both BaBar and Belle experiments, which were mentioned by name in the Nobel press release. Some related articles can also be read in: SLAC Today, Nature, Science , Symmetry Magazine.

The Belle II experiment is part of a broad-based search for new physics. The LHC, which is now operating with high luminosity at a center of mass energy of 7 TeV, is designed to search for new physics at the energy frontier, i.e., its high center-of-mass energy may allow it to produce heavy, as-yet-undiscovered particles such as Higgs bosons and supersymmetric partners of quarks and leptons or new particles linked to extra dimensions. The SuperKEKB/Belle II facility searches for new physics using very high luminosity, i.e., by precisely measuring and comparing with theory branching fractions, angular distributions, CP asymmetries, forward-backward asymmetries, and a host of other observables that are difficult or unfeasible to measure at the LHC. Deviations of experimental results from the SM predictions can then be interpreted in terms of NP.

This project is currently funded by DST-SERB.

Though the BaBar experiment was turned off in April 2008, there are still lots of opportunities available to perform physics analysis in a wide range of physics topics such as light Higgs search, search for dark-matter candidates, search for Lepton Flavor Violation (LFV) and search for rare decays amongst others.

This project was funded by the Start-Up Grant, IIT Guwahati.