Noise reduction algorithm for Glueball correlators

We present an error reduction method for obtaining glueball correlators from monte carlo simulations of SU(3) lattice gauge theory. We explore the scalar and tensor channels at three different lattice spacings. Using this method we can follow glueball correlators to temporal separations even up to 1 fermi. We estimate the improvement over the naive method and compare our results with existing computations.Comment: 6 pages, 4 tables and 2 figures, computations at larger volumes added, article partially rewritten, main conclusions unchange

Adsorption Study of Metal Ions Using Zirconia Nanopowders

The present work deals with the synthesis of nanostructured ZrO2particles, with and without surfactant (CTAB) for the adsorption of metal ionsof Fe (III), Co (II) and Ni (II). The work involves systematic study and analysis of the prepared sample aswell as study of the adsorption properties of the prepared sample using various characterization techniques like XRD, BET, UVVis spectroscopy and FESEM. XRD confirmed the phase of the samples as t-ZrO2with a crystallite size of 7.3 nm. BET measurements determined the surface area as 55 m2g-1 with particle size of 19.2 nm. UV-Vis spectroscopy helped in the determination of adsorption isotherm and order of the reaction. Generally the samples followed Freundlich adsorption isotherm and pseudo-second order kinetics. Fe (III) case showed the highest adsorption among all the three whereas Ni (II) showed lowest adsorption in case of without surfactant and Co (II) showed lowest adsorption in case of with surfactant. Samples with surfactant showed better adsorption phenomenon than samples without surfactant.

Spectroscopy of Charmed and Bottom Hadrons using Lattice QCD

We present preliminary results on the light, charmed and bottom baryon spectra using overlap valence quarks on the background of 2+1+1 flavours HISQ gauge configurations of the MILC collaboration. These calculations are performed on three different gauge ensembles at three lattice spacings (a ~ 0.12 fm, 0.09 fm and 0.06 fm) and for physical strange, charm and bottom quark masses. The SU(2) heavy baryon chiral perturbation theory is used to extrapolate baryon masses to the physical pion mass and the continuum limit extrapolations are also performed. Our results are consistent with the well measured charmed baryons. We predict the masses of many other states which are yet to be discovered.Comment: 8 pages, Proceedings of the 35th International Symposium on Lattice Field Theory (Lattice 2017

A spatiotemporal universal model for the prediction of the global solar radiation based on Fourier series and the site altitude

This paper presents the development, testing and validation of a novel generic type universal model consisting of a set of sine and cosine harmonics in the temporal and spatial domain suitably parameterized for the prediction of the mean expected global solar radiation H(n,φ) on the horizontal for a day, n, at any latitude φ. Its prediction power is further enhanced with the introduction of a correction term for the site altitude taking into account the φ dependent atmospheric height. Solar radiation data from 53 stations around the earth were obtained from GEBA database to train the model. H(n,φ) is expressed by a Fourier series of compact form with the zero frequency component dependent on φ providing the main spatial dependence and two n dependent harmonics in the form of cosine functions giving the time dependence. The φ dependent model parameters follow symmetry rules and are expressed by Fourier series up to the 3rd order harmonic. The 3D spatiotemporal profile of the model is in agreement to the extraterrestrial one. The model was validated using GEBA data from additional 28 sites and compared with NASA, PVGIS and SoDa data, showing the robustness, reliability and prediction accuracy of the proposed model

Statistical analysis of proton induced reactions to generate recommended data for the production of medical radio-isotopes

Radio-isotopes produced via proton induced reaction holds special significance regarding nuclear medicine, astrophysical p-process, theragnostic and diagnostic processes. $^{76}$Br, $^{80m}$Br and $^{61}$Cu are positron emitter and they are useful in the functional studies via Positron Emission Tomography (PET), whereas $^{77}$Br bears the potential for the application in Single Photon Emission Computed Tomography (SPECT) which involves electron capture process. PET and SPECT have been in high application in medical physics, diagnostics, therapy and nuclear medicine. $^{99m}$Tc and $^{64}$Cu are two popular radionuclide which play important role in nuclear medicine, currently being used in bio-medical physics, bone scan, modern imaging, blood pool leveling, oncology and diagnosis of copper related diseases. This paper focus on the generation of recommended nuclear reaction cross sections for the production of some useful medical radio-isotopes using the experimental datasets obtained from EXFOR database and simulated datasets from nuclear reaction model codes TALYS-1.95 and EMPIRE-3.1.1. 95\% confidence interval has been implemented to ensure confidence and precision