A. Kumar

ORCID: 0000-0002-8477-9079
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Particle Detector Development and Performance
  • Dark Matter and Cosmic Phenomena
  • Cosmology and Gravitation Theories
  • Neutrino Physics Research
  • Computational Physics and Python Applications
  • Atomic and Molecular Physics
  • Astrophysics and Cosmic Phenomena
  • Nuclear physics research studies
  • Radiation Detection and Scintillator Technologies
  • Black Holes and Theoretical Physics
  • Medical Imaging Techniques and Applications
  • Nuclear reactor physics and engineering
  • CCD and CMOS Imaging Sensors
  • Astronomical and nuclear sciences
  • Nuclear Physics and Applications
  • Advanced Chemical Physics Studies
  • X-ray Spectroscopy and Fluorescence Analysis
  • Atomic and Subatomic Physics Research
  • Cold Atom Physics and Bose-Einstein Condensates
  • Particle Accelerators and Free-Electron Lasers
  • Superconducting Materials and Applications
  • Distributed and Parallel Computing Systems

Panjab University
2016-2025

A. Alikhanyan National Laboratory
2015-2024

University of Delhi
2015-2024

University of Antwerp
2024

Institute of High Energy Physics
2024

Rice University
2021-2024

Deutsches Elektronen-Synchrotron DESY
2024

University of Alaska Anchorage
2024

Providence College
2024

Lawrence Berkeley National Laboratory
2024

We report a search for neutrino oscillations to sterile neutrinos under model with three active and one (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>3</a:mn><a:mo>+</a:mo><a:mn>1</a:mn></a:mrow></a:math> model). This analysis uses the NOvA detectors exposed NuMI beam, running in mode. The data exposure, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...

10.1103/physrevlett.134.081804 article EN cc-by Physical Review Letters 2025-02-26

A family of four odd parity bands in 127Xe has been investigated via in-beam γ-ray spectroscopy and conclusive evidence for the first second phonon longitudinal wobbling excitations found. Spectroscopic measurements confirm predominant E2 character ΔI=1 transitions between bands. This provides experimental mode associated with a neutron configuration.

10.1016/j.physletb.2020.135854 article EN cc-by Physics Letters B 2020-10-15

Fast highly charged C and O ion-induced total ionization of an RNA base molecule, uracil (C${}_{4}$H${}_{4}$N${}_{2}$O${}_{2}$, $m=112$ amu), has been investigated in a wide energy range keV to MeV. A combined study the collision products using time-of-flight mass spectrometer electron allows one determine absolute cross sections (TCSs). Experimental measurements TCSs are compared theoretical predictions performed classical trajectory Monte Carlo over-barrier (CTMC-COB) quantum mechanical...

10.1103/physreva.85.032711 article EN Physical Review A 2012-03-26

We use the forward-backward angular asymmetry in electron emission cross sections fast ion impact ionization of ${\mathrm{H}}_{2}$ as a probe inversion symmetric coherence homonuclear diatomic molecules. The energy dependence parameter for exhibits oscillatory structure due to Young-type interference contrast atomic targets such He. technique provides self-normalized method reveal oscillation independent theoretical models and complementary measurements on H target.

10.1103/physreva.74.060701 article EN Physical Review A 2006-12-19

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...

10.1088/1748-0221/20/02/t02001 article EN Journal of Instrumentation 2025-02-01

This project presents the design and development of a semi-autonomous drone system that integrates advanced technologies to enhance its operational efficiency, adaptability, functionality. The incorporates multiple components, including an LCD display for real-time data monitoring, GSM module remote communication, GPS autonomous navigation. A key innovation in this is human identification feature, which utilizes wireless cameras image processing techniques detect track individuals within...

10.32628/ijsrst25122213 article EN International Journal of Scientific Research in Science and Technology 2025-03-08

Double- and single-differential cross sections for inclusive charged-current <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>ν</a:mi><a:mi>μ</a:mi></a:msub></a:math>-nucleus scattering are reported the kinematic domain 0 to <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mn>2</c:mn><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>GeV</c:mi><c:mo>/</c:mo><c:mi>c</c:mi></c:mrow></c:math> in three-momentum transfer 2 GeV...

10.1103/physrevd.111.052009 article EN cc-by Physical review. D/Physical review. D. 2025-03-19

We report the energy and angular distribution of electron double differential cross sections (DDCS) in collision $6\text{\ensuremath{-}}\mathrm{MeV}∕\mathrm{u}\phantom{\rule{0.3em}{0ex}}{\mathrm{C}}^{6+}$ ions with molecular hydrogen. explain observed distributions terms two-center effect Young-type interference effect. The secondary electrons having energies between 1 $1000\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ are detected at about 10 different emission angles...

10.1103/physreva.75.052712 article EN Physical Review A 2007-05-17

Experimental measurements of evaporation residue (ER) cross sections for the $^{19}F$ + $^{194,196,198}\mathrm{Pt}$ reactions forming $^{213,215,217}\mathrm{Fr}$ compound nuclei are reported. The measured at beam energies in range 101--137.3 MeV. survival probability $^{213}\mathrm{Fr}$ nucleus with neutron number $N=126$ is found to be lower than probabilities $^{215}\mathrm{Fr}$ and $^{217}\mathrm{Fr}$ numbers $N=128$ 130 respectively. Statistical model analysis ER show that an excitation...

10.1103/physrevc.89.024609 article EN Physical Review C 2014-02-18

The fixed-target MIPP experiment, Fermilab E907, was designed to measure the production of hadrons from collisions momenta ranging 5 120 GeV/c on a variety nuclei. These data will generally improve simulation particle detectors and predictions beam fluxes at accelerators. spectrometer momentum resolution is between 3 4%, identification performed for particles 0.3 80 using $dE/dx$, time-of-flight Cherenkov radiation measurements. collected $1.42 \times10^6$ events GeV Main Injector protons...

10.1103/physrevd.90.032001 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2014-08-04

The High Luminosity phase of the Large Hadron Collider will deliver 10 times more integrated luminosity than existing collider, posing significant challenges for radiation tolerance and event pileup on detectors, especially forward calorimetry. As part its upgrade program, Compact Muon Solenoid collaboration is designing a high-granularity calorimeter (HGCAL) to replace endcap calorimeters. It feature unprecedented transverse longitudinal readout triggering segmentation both electromagnetic...

10.1088/1748-0221/13/10/p10023 article EN cc-by Journal of Instrumentation 2018-10-18

NOvA is a long-baseline neutrino oscillation experiment that measures oscillations in charged-current <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi>ν</a:mi></a:mrow><a:mrow><a:mi>μ</a:mi></a:mrow></a:msub><a:mo stretchy="false">→</a:mo><a:msub><a:mrow><a:mi>ν</a:mi></a:mrow><a:mrow><a:mi>μ</a:mi></a:mrow></a:msub></a:mrow></a:math> (disappearance) and <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"...

10.1103/physrevd.110.012005 article EN cc-by Physical review. D/Physical review. D. 2024-07-10

As the heaviest known fundamental particle, top quark has taken a central role in study of interactions. Production quarks pairs provides an important probe strong The mass is key parameter which places valuable constraint on Higgs boson and electroweak symmetry breaking. Observations relative rates kinematics final states constrain potential new physics. In many cases, tests available with are both critical unique. Large increases data samples from Fermilab Tevatron have been coupled major...

10.1142/s0217751x08039293 article EN International Journal of Modern Physics A 2008-02-10

We have measured the absolute double-differential cross sections (DDCSs) for electron emission in ionization of O${}_{2}$ molecules under impact 3.5-MeV/u C${}^{6+}$ ions. The data were collected between 10 and 600 eV, an angular range ${30}^{\ensuremath{\circ}}$ to ${150}^{\ensuremath{\circ}}$. single-differential (SDCSs) angle energy are deduced from DDCS spectra. Also, total section has been obtained SDCS spectra as well compared with continuum distorted-wave eikonal initial-state...

10.1103/physreva.85.062705 article EN Physical Review A 2012-06-18

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.

10.1103/physrevd.99.122004 article EN publisher-specific-oa Physical review. D/Physical review. D. 2019-06-28

10.5281/zenodo.1331565 article EN cc-by Zenodo (CERN European Organization for Nuclear Research) 2008-01-27

A simple physics-based analytical model for a non-self-aligned GaN MESFET suitable microwave frequency applications is presented. The includes the effect of parasitic source/drain resistances and gate length modulation. then extended to evaluate I–V C–V characteristics, transconductance, cut-off frequency, transit time, RC time constant, optimum noise figure maximum power density. transconductance about 21 mS/mm obtained using present theory in comparison 23 reported data. more than 1 GHz, 6...

10.1016/s0026-2692(01)00062-3 article EN Microelectronics Journal 2001-12-01

The one-loop effective energy density of a pure SU (2) Yang–Mills theory in the Savvidy background is reconsidered. stable and unstable modes are identified. treated quadratic approximation. For modes, full expansion including cubic quartic terms fluctuations used. functional integral for evaluated added to result modes. resulting coincides with real part approximation earlier studies there now no imaginary part.

10.1142/s0217732305017913 article EN Modern Physics Letters A 2005-07-11

Excited states of 127Xe were populated in the 122Sn(9Be, 4nγ) fusion-evaporation reaction at a beam energy 48 MeV. A sequence ΔI = 2 γ-transitions has been observed above Iπ 19/2+ state 2307 keV. Spin and parity belonging to this band have assigned firmly. The dynamic moment inertia is found be low almost constant as function angular momentum. Observed experimental features along with results theoretical semiclassical model calculation suggest an antimagnetic rotational character for band.

10.1088/1361-6471/ab5374 article EN Journal of Physics G Nuclear and Particle Physics 2019-11-01
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