C. Kuruppu
A5023225329- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Pulsars and Gravitational Waves Research
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Muon and positron interactions and applications
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
University of South Carolina
2018-2025
South Carolina Department of Education
2018-2024
New Mexico State University
2024
The NOvA experiment has made a $4.4\sigma$-significant observation of $\bar\nu_{e}$ appearance in 2 GeV $\bar\nu_{\mu}$ beam at distance 810 km. Using $12.33\times10^{20}$ protons on target delivered to the Fermilab NuMI neutrino beamline, recorded 27 $\bar\nu_{\mu} \rightarrow \bar\nu_{e}$ candidates with background 10.3 and 102 \bar\nu_{\mu}$ candidates. This new antineutrino data is combined measure oscillation parameters $|\Delta m^2_{32}| = 2.48^{+0.11}_{-0.06}\times10^{-3}$ eV$^2/c^4$,...
We present updated results from the NOvA experiment for $\nu_\mu\rightarrow\nu_\mu$ and $\nu_\mu\rightarrow\nu_e$ oscillations an exposure of $8.85\times10^{20}$ protons on target, which represents increase 46% compared to our previous publication. The utilize significant improvements in both simulations analysis data. A joint fit data $\nu_\mu$ disappearance $\nu_e$ appearance gives best point as normal mass hierarchy, $\Delta m^2_{32} = 2.44\times 10^{-3}{{\rm eV}^2}/c^4$,...
We present new $ν_μ\rightarrowν_e$, $ν_μ\rightarrowν_μ$, $\overlineν_μ\rightarrow\overlineν_e$, and $\overlineν_μ\rightarrow\overlineν_μ$ oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over previously reported results. The additional data, combined published neutrino antineutrino are all analyzed using improved techniques simulations. A joint fit to $ν_e$, $ν_μ$, $\overlineν_e$, $\overlineν_μ$ candidate samples within 3-flavor framework...
Abstract The two-detector design of the NOvA neutrino oscillation experiment, in which two functionally identical detectors are exposed to an intense beam, aids canceling leading order effects cross-section uncertainties. However, limited knowledge interaction cross sections still gives rise some largest systematic uncertainties current measurements. We show contemporary models interactions be discrepant with data from NOvA, consistent discrepancies seen other experiments. Adjustments GENIE...
Abstract Measuring observables to constrain models using maximum-likelihood estimation is fundamental many physics experiments. Wilks' theorem provides a simple way construct confidence intervals on model parameters, but it only applies under certain conditions. These conditions, such as nested hypotheses and unbounded are often violated in neutrino oscillation measurements other experimental scenarios. Monte Carlo methods can address these issues, albeit at increased computational cost. In...
The NOvA long-baseline neutrino experiment uses a pair of large, segmented, liquid-scintillator calorimeters to study oscillations, using GeV-scale neutrinos from the Fermilab NuMI beam. These detectors are also sensitive flux which emitted during core-collapse supernova through inverse beta decay interactions on carbon at energies $\mathcal{O}(10~\text{MeV})$. This signature provides means dominant mode energy release for occurring in our galaxy. We describe data-driven software trigger...
We report cross-section measurements of the final-state muon kinematics for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ charged-current interactions in NOvA near detector using an accumulated $8.09\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target NuMI beam. present results as a double-differential cross section observed outgoing energy and angle, well single-differential sections derived neutrino energy, ${E}_{\ensuremath{\nu}}$, square four-momentum transfer, ${Q}^{2}$. compare to...
The inclusive electron neutrino charged-current cross section is measured in the NOvA near detector using $8.02\times10^{20}$ protons-on-target (POT) NuMI beam. sample of GeV interactions largest analyzed to date and limited by $\simeq$ 17\% systematic rather than 7.4\% statistical uncertainties. double-differential final-state energy angle presented for first time, together with single-differential dependence on $Q^{2}$ (squared four-momentum transfer) energy, range 1 $ \leq E_{\nu} < $6...
The cross section of neutrino-induced neutral-current coherent ${\ensuremath{\pi}}^{0}$ production on a carbon-dominated target is measured in the NOvA near detector. This measurement uses narrow-band neutrino beam with an average energy 2.7 GeV, which interest to ongoing and future long-baseline oscillation experiments. measured, flux-averaged...
Using two years of data from the NOvA Near Detector at Fermilab, we report a seasonal variation cosmic ray induced multiple-muon event rates which has an opposite phase to in atmospheric temperature. The strength multipl$ increase as function muon multiplicity. However, no significant dependence is seen zenith angle, or spatial angular separation between correlated muons.
This Letter reports results from the first long-baseline search for sterile antineutrinos mixing in an accelerator-based antineutrino-dominated beam. The rate of neutral-current interactions two NOvA detectors, at distances 1 and 810 km beam source, is analyzed using exposure 12.51×10^{20} protons-on-target NuMI Fermilab running antineutrino mode. A total 121 candidates are observed far detector, compared to a prediction 122±11(stat.)±15(syst.) assuming only between three active flavors. No...
Cross sections for the interaction $\nu_\mu A\rightarrow\mu^-\pi^0 X$ with neutrino energies between 1 and 5~GeV are measured using a sample of 165k selected events collected in NOvA experiment's Near Detector, hydrocarbon-based detector exposed to NuMI beam at Fermi National Accelerator Laboratory. Results presented as flux-averaged total cross section differential momenta angles outgoing muon $\pi^0$, four-momentum transfer, invariant mass hadronic system. Comparisons made predictions from...
Using the NOvA neutrino detectors, a broad search has been performed for any signal coincident with 28 gravitational wave events detected by LIGO/Virgo Collaboration between September 2015 and July 2019. For all of these events, is sensitive to possible arrival neutrinos cosmic rays GeV higher energies. five (seven) in Far (Near) Detector, timely public alerts from allowed recording MeV-scale events. No candidates were found.
We report a search for magnetic monopole component of the cosmic-ray flux in 95-day exposure NOvA experiment's Far Detector, 14 kt segmented liquid scintillator detector designed primarily to observe GeV-scale electron neutrinos. No events consistent with monopoles were observed, setting an upper limit on $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}14}\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}2}\text{ }{\mathrm{s}}^{\ensuremath{-}1}\text{ }{\mathrm{sr}}^{\ensuremath{-}1}$ at...
We report the rate of cosmic ray air showers with multiplicities exceeding 15 muon tracks recorded in NOvA Far Detector between May 2016 and 2018. The detector is located on surface under an overburden 3.6 meters water equivalent. observe a seasonal dependence multiple-muon showers, which varies magnitude multiplicity zenith angle. During this period, effective atmospheric temperature pressure ranged 210 K 230 940 mbar 990 mbar, respectively; shower rates are anticorrelated variation...
A search is performed for supernova-like neutrino interactions coincident with 76 gravitational wave events detected by the LIGO/Virgo Collaboration. For 40 of these events, full readout time around available from NOvA Far Detector. we set limits on fluence sum all flavors $F < 7(4)\times 10^{10}\mathrm{cm}^{-2}$ at 90% C.L. assuming energy and distributions corresponding to Garching supernova models masses 9.6(27)$\mathrm{M}_\odot$. Under hypothesis that any given event was caused a...
SpinQuest is a cutting-edge, high-luminosity Drell-Yan experiment utilizing polarized hy- drogen and deuterium targets to measure the Sivers asymmetry for light sea quarks in nucleon. Detecting nonzero would provide clear evidence or- bital angular momentum of quarks. The presents itself as an azimuthal production virtual photons via process, will be able this using existing SeaQuest dimuon spectrometer. In addi- tion making measurements sensitive quark function, we also J/ψ particles, which...
The analysis is based on the use of both particle identification and kinematic selection criteria Convolutional Neural Networks (CNN) to achieve a purity 60%. Given energy range 1-5 GeV accessible with available NOvA exposure in NuMI beam, results will also be relevant for f uture neutrino experiments like Deep Underground Neutrino Experiment (DUNE).
We present the status of a measurement inclusive $$\nu_{\mu}$$ CC cross section in NOvA Near Detector.