Indian Institute of Technology Bhubaneswar

About: Indian Institute of Technology Bhubaneswar is a education organization based out in Bhubaneswar, India. It is known for research contribution in the topics: Large Hadron Collider & Computer science. The organization has 1185 authors who have published 3132 publications receiving 48832 citations.

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at $ \sqrt{s} $ = 13 TeV

Abstract: The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d t) and chromomagnetic (μ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μt=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d t| < 0.03 at 95% confidence level.

Observational perspective of SST changes during life cycle of tropical cyclones over Bay of Bengal

Abstract: Sea surface temperature (SST) plays a significant role in tropical cyclone (TC) formation and intensity evolution, while at the same time, TC induces SST changes during its life cycle. This work deals with the TC-induced SST changes associated with 21 TCs of Bay of Bengal (BoB) during 2006–2013. The SST analyses obtained from National Centre for Oceanic Information Services (INCOIS-SST) and real-time global SST (RTG-SST) are used along with buoy observations. Initial analyses reveal that INCOIS-SST is consistently better than RTG-SST with a good correlation and least root-mean-square error for both post- and pre-monsoon seasons. Overall results demonstrated that mean SST cooling decreases with increased translation speed of TCs within a radius of 50, 100 and 200 km from its centre. Further, a maximum SST cooling of ~2 and ~1.8 °C is noticed in pre- and post-monsoon, respectively, within the radial distance of 50–100 km from centre for slow-moving TCs, 1.2 and 1.0 °C for moderate and 0.9 and 0.7 °C for fast-moving TCs. The TCs formed over the southern BoB have a greater SST cooling up to 200 km radial distance followed by those formed over central and northern BoB in pre- and post-monsoon; however, the magnitudes of cooling in pre-monsoon seasons are greater than post-monsoon season. The minimum cooling over northern BoB may be attributed to the strong haline stratification as compared to the central and southern BoB during both seasons. However, there is a higher magnitude of stratification in post- compared to pre-monsoon, which might play a significant role in lesser SST cooling in post-monsoon season compared to pre-monsoon season.

Search for a low-mass τ−τ+ resonance in association with a bottom quark in proton-proton collisions at s√ = 13 TeV

Abstract: A general search is presented for a low-mass τ−τ+ resonance produced in association with a bottom quark. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. The data are consistent with the standard model expectation. Upper limits at 95% confidence level on the cross section times branching fraction are determined for two signal models: a light pseudoscalar Higgs boson decaying to a pair of τ leptons produced in association with bottom quarks, and a low-mass boson X decaying to a τ-lepton pair that is produced in the decay of a bottom-like quark B such that B → bX. Masses between 25 and 70 GeV are probed for the light pseudoscalar boson with upper limits ranging from 250 to 44 pb. Upper limits from 20 to 0.3 pb are set on B masses between 170 and 450 GeV for X boson masses between 20 and 70 GeV.

Phase and Shape Dependent Non–enzymatic Glucose Sensing Properties of Nickel Molybdate

Abstract: In this work, we demonstrate a facile low temperature synthesis approach to tune α and β-NiMoO4 by controlling the urea concentration. Comparative non-enzymatic electrochemical glucose sensing properties of NiMoO4 nanomaterials with α and β phases have been studied in detail. The mechanisms related to the phase and morphology transformation from α-NiMoO4 nanoparticles to β-NiMoO4 nanosheets are proposed and discussed by thoroughly characterizing the as-prepared materials. It is observed that the α-NiMoO4 exhibits sensitivity of 0.208 μAμM−1cm−2 whereas sensitivity of 1.057 μAμM−1cm−2 is achieved for the β-NiMoO4. Thus, it is confirmed that β- NiMoO4 nanosheets perform five times high glucose sensing performance as compared to the α-NiMoO4 nanoparticles and demonstrates its application as high-performance glucose sensor.

Comparative electrochemical energy storage performance of cobalt sulfide and cobalt oxide nanosheets: experimental and theoretical insights from density functional theory simulations

Abstract: In this study, we have carried out studies on supercapacitor performance comparing cobalt oxide (Co3O4) with cobalt sulfide (Co3S4) nanosheets grown using a facile electrodeposition approach. We have investigated the origin of enhanced energy storage performance of Co3S4 as compared to Co3O4 both by supported experiments and density functional theory investigations. Cobalt oxide exhibits a specific capacitance of 200 F g-1 at a current density of 2 A g-1, whereas a high specific capacitance of 558 F g-1 was achieved in the case of the Co3S4 nanosheets. The enhanced supercapacitor performance of Co3S4 is due to the high surface area, better wettability and high conductivity of the nanosheets. The asymmetric device exhibited a maximum energy density of 47.3 W h kg-1 with a power density of 2388.4 W kg-1 for Co3S4//MWCNT. The electrochemical impedance spectroscopic analysis revealed that Co3O4 has a substantially bigger semicircle as compared to Co3S4, confirming inferior charge-transfer characteristics in Co3O4. Density functional theory (DFT) simulations revealed that bulk structures of both Co3S4 and Co3O4 have an anti-ferromagnetic (AFM) configuration with Co atoms at the tetrahedral site having an opposite spin (∼2.55 μB each) and those at the octahedral sites being non-magnetic. Co3S4 nanosheets are found to be more conducting due to the presence of higher density of states near the Fermi level and a smaller bandgap compared to Co3O4 which support the observed experimental data on enhanced energy storage performance of Co3S4.