Jaydip Singh | Indian Institute of Technology Bombay (original) (raw)
Papers by Jaydip Singh
Pramana, 2005
The two-neutrino double beta decay of 96 Zr isotope for 0 + → 2 + transition has been studied in ... more The two-neutrino double beta decay of 96 Zr isotope for 0 + → 2 + transition has been studied in the PHFB model. In our earlier work, the reliability of the intrinsic wave functions of 96 Zr and 96 Mo isotopes has been established by obtaining an overall agreement between a number of theoretically calculated spectroscopic properties as well as half-lives of 2ν ββ decay for 0 + → 0 + transition and the available experimental data. In the present work, the half-life of 2ν ββ decay for 0 + → 2 + transition T 2ν 1/2 (0 + → 2 +) has been calculated using the same set of intrinsic wave functions. Keywords. 2ν ββ decay; 0 + → 2 + transition; PHFB model; spectroscopic properties; half-life T 2ν 1/2 (0 + → 2 +).
Journal of Instrumentation
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowi... more The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current in...
arXiv (Cornell University), Aug 7, 2022
Long baseline (LBL) neutrino experiments aim to measure the neutrino oscillation parameters to hi... more Long baseline (LBL) neutrino experiments aim to measure the neutrino oscillation parameters to high precision. These experiments use nuclear targets for neutrino scattering and hence are inflicted with complexities of nuclear effects. Nuclear effects and their percolation into sensitivity measurement of neutrino oscillations parameters are not yet fully understood and therefore need to be dealt with carefully. In a recent work [1], we reported some results on this for NOνA experiment using the kinematic method of neutrino energy reconstruction, where it was observed that the nuclear effects are important in sensitivity analysis, and inclusion of realistic detector set up specifications increases uncertainty in this analysis as compared to ideal detector case. Precise reconstruction of neutrino energy is an important component in the extraction of oscillation parameters, and it is required that the neutrino energy is reconstructed with very high precision. With this motivation, in this work, we use two methods of neutrino energy reconstruction-kinematic and calorimetric, including the nuclear effects, and study their impact on sensitivity analysis. We consider nuclear interactions such as RPA and 2p2h and compare two energy reconstruction methods with reference to events generation, measurement of neutrino oscillation parameters ∆m 2 32 and θ23 for (νµ → νµ) disappearance channel, mass hierarchy sensitivity, and CP-violation sensitivity for (νµ → νe) appearance channel of the NOνA experiment. It is observed that with an ideal detector setup, the kinematic method shows significant dependence on nuclear effects, as compared to the calorimetric method. We also investigate the impact of realistic detector setup for NOνA in these two methods (with nuclear effects) and find that the calorimetric method shows more bias (uncertainty increases) in sensitivity contours, as compared to the kinematic method. This is found to be true for both the mass hierarchies and for both neutrino and antineutrino incoming beams. The results of this study can offer useful insights into future neutrino oscillation analysis at LBL experiments (including leptonic CP phase measurement), especially when we are in the precision measurement era for the same, particularly in the context of some nuclear effects and energy reconstruction methods.
arXiv (Cornell University), Jun 7, 2021
In this paper, we discuss neutrino mass eigenvalues for four flavor neutrino mixing. An extra mas... more In this paper, we discuss neutrino mass eigenvalues for four flavor neutrino mixing. An extra mass states, in four flavor mixing and possible various combination of CP violating Majorana phases effects the neutrino mass eigenvalues. We have considered the effective Majorana mass me, related for (ββ) 0ν decay. In calculation, we consider two different neutrino mass order, normal and inverted. We find the limits for neutrino mass eigenvalue mi in the different neutrino mass spectrum and the sum of all four neutrino masses is ≡ m1 + m2 + m3 + m4 ∼ 1.17eV which is relevant for cosmological observations and explain the different neutrino oscillations data.
Advances in High Energy Physics, 2019
Inspired by the experimental anomalies in neutrino physics and recent oscillation data from short... more Inspired by the experimental anomalies in neutrino physics and recent oscillation data from short baseline and another neutrino experiment, the realization of one extra neutrino flavor seems to be favoring. This extra flavor may change the observable, |mββ|, of current data taking and next-generation (ββ)0ν-decay experiments aim to probe and possibly look at the Inverted Ordering region (|mββ|≃10-2eV) of parameter space. This observation would allow establishing physics beyond the standard model and phenomena like lepton number violation and Majorana nature of neutrino. The range of this observable (|mββ|) is not very well defined for both the ordering of mass spectrum (Normal Ordering and Inverted Ordering). Several attempts have been made for defining exactly the range for three active neutrino states. For contrasting this range, I have worked with an extra mass state, ν4, and its effect on the observable with various combinations of CP violation Majorana phases by taking into acc...
Energy reconstruction of very high energy muons originating from cosmogenic neutrinos 1 and very ... more Energy reconstruction of very high energy muons originating from cosmogenic neutrinos 1 and very high energy cosmic rays. Searches for Weakly Interacting Massive Particles (WIMPs) using neutrino-induced upward-going muons, as done by Super-Kamiokande 2. This kind of multimessenger astronomy works at the TeV scale and are being tested with IceCube 3 and SK. DUNE far detector (FD) may also be used to detect high-energy (TeV range) muons.
Cornell University - arXiv, Nov 2, 2022
CERN European Organization for Nuclear Research - Zenodo, Aug 17, 2022
International Journal of Theoretical Physics
The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement ... more The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement of neutrino mixing parameters and the confirmation of the mass hierarchy. The systematic inaccuracy in the cross-section models introduces inaccuracy in the neutrino mixing parameters estimation. It is important to secure a large decrease of uncertainties, particularly those related to cross-section, neutrino-nucleus interactions, and neutrino energy reconstruction, in order to achieve these ambitious goals. In this research article, we use three alternative neutrino event generators, GENIE, NuWro, and GiBUU, to analyze the sensitivity studies of T2HK, DUNE, and combined sensitivity of DUNE, and T2HK for mass hierarchy, CP violation, and octant degeneracy caused by cross-section uncertainties. The cross-section models of these generators are separate and independent.
Le Centre pour la Communication Scientifique Directe - HAL - Paris Observatory, Jul 18, 2022
The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic es... more The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic essential to the reconstruction of particle interactions in liquid argon time projection chamber detectors. Pandora is the primary event reconstruction software used at ProtoDUNE-SP, a prototype for the Deep Underground Neutrino Experiment far detector. ProtoDUNE-SP, located at CERN, is exposed to a charged-particle test beam. This paper gives an overview of the Pandora reconstruction algorithms and how they have been tailored for use at ProtoDUNE-SP. In complex events with numerous cosmic-ray and beam background particles, the simulated reconstruction and identification efficiency for triggered test-beam particles is above 80% for the majority of particle type and beam momentum combinations. Specifically, simulated 1 GeV/c charged pions and protons are correctly reconstructed and identified with efficiencies of 86.1±0.6% and 84.1±0.6%, respectively. The efficiencies measured for test-beam data are shown to be within 5% of those predicted by the simulation.
The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement ... more The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement of neutrino mixing parameters and the confirmation of mass hierarchy. The systematic inaccuracy in the cross-section models introduces inaccuracy in the neutrino mixing parameters estimation. It is important to secure a large decrease of uncertainties, particularly those relating to cross-section, neutrino-nucleus interactions, and neutrino-energy reconstruction, in order to achieve these ambitious goals. In this research article, we use three alternative neutrino event generators, GENIE, NuWro, and GiBUU, to analyze sensitivity studies of T2HK, DUNE, and combined sensitivity of DUNE, and T2HK for mass hierarchy, CP violation, and octant degeneracy caused by cross-section uncertainties. The cross-section models of these generators are separate and independent.
Brazilian Journal of Physics
To achieve appropriate interaction rates in recent neutrino oscillation studies, high atomic numb... more To achieve appropriate interaction rates in recent neutrino oscillation studies, high atomic number nuclear targets were utilized. Because of the nuclear effects in the experimental observable, the utilization of these complicated targets produced systematic uncertainties that needed to be assessed accurately to constrain the discovery. We made an effort to calculate the nuclear effects in the Ar and H targets, which are intended to be employed at the DUNE distant and near detectors, respectively, through our simulation effort. The DUNE flux is peaking around 2.5 GeV and CCRES is the dominant process at this energy. So, this work will be focused only on the CCQE and CCRES interactions and the simulations will be done using two different neutrino event generators. We reported the ratio of the oscillation probability (P(Ar)/P(H) as a function of reconstructed neutrino energy for CCRES channels to quantify the systematic errors in the observables.
Ukrainian Journal of Physics, 2022
Recent neutrino oscillation experiments used high atomic number nuclear targets to attain suffici... more Recent neutrino oscillation experiments used high atomic number nuclear targets to attain sufficient interaction rates. The use of these complex targets introduced systematic uncertainties due to the nuclear effects in the experimental observables and need to be measured properly to pin down the discovery. Through this simulation work, we are trying to quantify the nuclear effects in the argon (Ar) target in comparison to hydrogen (H) target which are proposed to be used at Deep Underground Neutrino Experiment far detector and near detector, respectively. Generated Events for Neutrino Interaction Experiments and NuWro, two neutrino event generators, are used to construct final state kinematics. To quantify the systematic uncertainties in the observables, we present the ratio of the oscillation probabilities (P(Ar)/P(H)) as a function of the reconstructed neutrino energy.
Springer Proceedings in Physics, 2021
The precise measurement of neutrino oscillation parameters is one of the highest priorities in ne... more The precise measurement of neutrino oscillation parameters is one of the highest priorities in neutrino oscillation physics. To achieve the desired precision, it is necessary to reduce the systematic uncertainties related to neutrino energy reconstruction. An error in energy reconstruction is propagated to all the oscillation parameters; hence, a careful estimation of neutrino energy is required. To increase the statistics, neutrino oscillation experiments use heavy nuclear targets like Argon (Z=18). The use of these nuclear targets introduces nuclear effects that severely impact the neutrino energy reconstruction which in turn poses influence in the determination of neutrino oscillation parameters. In this work we have tried to study the impact of nuclear effects on the determination of CP phase at DUNE using final state interactions.
Cosmic rays primarily composed of high energy protons and atomic nuclei which interact with the e... more Cosmic rays primarily composed of high energy protons and atomic nuclei which interact with the earth’s atmospheric nuclei and produce pions and kaons, these particles further decay to muons. The charge ratio of these energetic muons is an important measurable which carries information about (i) pi/k hadronic production ratio (ii) Composition of cosmic ray primaries (iii) Contribution of charmed hadrons (iv) Neutrino flux at very high energies etc. Measurement of this ratio up to tens of TeV has been made by several experiments(MINOS (Adamson et al., Phys Rev, D76:052003, (2007), [4]), OPERA (Agafonova et al., Eur Phys J, C67:25,(2010), [5]), CMS (Khachatryan et al., Phys Lett, B692:83, (2010), [6]) etc.). The proposed ICAL detector at INO (Chatterjee et al., JINST, 9(2014):PO7001, (2014), [1]) is a large underground magnetized iron detector. This detector is shielded by 1.2 Km of rock(approx). When the muons produced in the atmosphere pass through rock, low energy muons are stopped...
Recent neutrino oscillation experiments used high atomic number nuclear targets to attain suffici... more Recent neutrino oscillation experiments used high atomic number nuclear targets to attain sufficient interaction rates. The use of these complex targets introduced systematic uncertainties due to the nuclear effects in the experimental observable and need to be measured properly to pin down the discovery. Through this simulation work, we are trying to quantify the nuclear effects in the Ar target in comparison to H target which are proposed to be used at DUNE far detector and near detector respectively. GENIE and NuWro, two neutrino event generators, are used to construct final state kinematics. To quantify the systematic uncertainties in the observables, we present the ratio of the oscillation probability (P(Ar)/P(H)) as a function of reconstructed neutrino energy.
arXiv: Nuclear Theory, 2019
Different neutrino oscillation experiments use nuclear targets for the study of exotic physics. N... more Different neutrino oscillation experiments use nuclear targets for the study of exotic physics. Nuclear effects are introduced in the experimental environment by the use of these targets and need to be quantified as they add to the systematic errors. In low energy region(around 1 GeV) multi-nucleon events are present along with QE and Delta interactions. Therefore if these multinucleon events are not incorporated in the data set properly, we end up with an inaccurate reconstruction of neutrino energy. In our work, we have illustrated the importance of incorporation of multinucleon events for the reduction of systematic errors in physics predictions for DUNE. To achieve this we have presented the event distribution ratio of Ar/C, Ar/Ar and C/C as a function of squared four momentum transfer by employing different nuclear models. This analysis recommends the addition of 2p2h or multinucleon events in the event sample and promotes model with RPA effect for the analysis of the event sam...
Instruments, 2021
The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed... more The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. DUNE will study questions pertaining to the preponderance of matter over antimatter in the early universe, the dynamics of supernovae, the subtleties of neutrino interaction physics, and a number of beyond the Standard Model topics accessible in a powerful neutrino beam. A critical component of the DUNE physics program involves the study of changes in a powerful beam of neutrinos, i.e., neutrino oscillations, as the neutrinos propagate a long distance. The experiment consists of a near detector, sited close to the source of the beam, and a far detector, sited along the beam at a large distance. This document, the DUNE Near Detector Conceptual Design Report (CDR), describes the design of the DUNE near detector and the science program that drives the design and te...
Pramana, 2005
The two-neutrino double beta decay of 96 Zr isotope for 0 + → 2 + transition has been studied in ... more The two-neutrino double beta decay of 96 Zr isotope for 0 + → 2 + transition has been studied in the PHFB model. In our earlier work, the reliability of the intrinsic wave functions of 96 Zr and 96 Mo isotopes has been established by obtaining an overall agreement between a number of theoretically calculated spectroscopic properties as well as half-lives of 2ν ββ decay for 0 + → 0 + transition and the available experimental data. In the present work, the half-life of 2ν ββ decay for 0 + → 2 + transition T 2ν 1/2 (0 + → 2 +) has been calculated using the same set of intrinsic wave functions. Keywords. 2ν ββ decay; 0 + → 2 + transition; PHFB model; spectroscopic properties; half-life T 2ν 1/2 (0 + → 2 +).
Journal of Instrumentation
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowi... more The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current in...
arXiv (Cornell University), Aug 7, 2022
Long baseline (LBL) neutrino experiments aim to measure the neutrino oscillation parameters to hi... more Long baseline (LBL) neutrino experiments aim to measure the neutrino oscillation parameters to high precision. These experiments use nuclear targets for neutrino scattering and hence are inflicted with complexities of nuclear effects. Nuclear effects and their percolation into sensitivity measurement of neutrino oscillations parameters are not yet fully understood and therefore need to be dealt with carefully. In a recent work [1], we reported some results on this for NOνA experiment using the kinematic method of neutrino energy reconstruction, where it was observed that the nuclear effects are important in sensitivity analysis, and inclusion of realistic detector set up specifications increases uncertainty in this analysis as compared to ideal detector case. Precise reconstruction of neutrino energy is an important component in the extraction of oscillation parameters, and it is required that the neutrino energy is reconstructed with very high precision. With this motivation, in this work, we use two methods of neutrino energy reconstruction-kinematic and calorimetric, including the nuclear effects, and study their impact on sensitivity analysis. We consider nuclear interactions such as RPA and 2p2h and compare two energy reconstruction methods with reference to events generation, measurement of neutrino oscillation parameters ∆m 2 32 and θ23 for (νµ → νµ) disappearance channel, mass hierarchy sensitivity, and CP-violation sensitivity for (νµ → νe) appearance channel of the NOνA experiment. It is observed that with an ideal detector setup, the kinematic method shows significant dependence on nuclear effects, as compared to the calorimetric method. We also investigate the impact of realistic detector setup for NOνA in these two methods (with nuclear effects) and find that the calorimetric method shows more bias (uncertainty increases) in sensitivity contours, as compared to the kinematic method. This is found to be true for both the mass hierarchies and for both neutrino and antineutrino incoming beams. The results of this study can offer useful insights into future neutrino oscillation analysis at LBL experiments (including leptonic CP phase measurement), especially when we are in the precision measurement era for the same, particularly in the context of some nuclear effects and energy reconstruction methods.
arXiv (Cornell University), Jun 7, 2021
In this paper, we discuss neutrino mass eigenvalues for four flavor neutrino mixing. An extra mas... more In this paper, we discuss neutrino mass eigenvalues for four flavor neutrino mixing. An extra mass states, in four flavor mixing and possible various combination of CP violating Majorana phases effects the neutrino mass eigenvalues. We have considered the effective Majorana mass me, related for (ββ) 0ν decay. In calculation, we consider two different neutrino mass order, normal and inverted. We find the limits for neutrino mass eigenvalue mi in the different neutrino mass spectrum and the sum of all four neutrino masses is ≡ m1 + m2 + m3 + m4 ∼ 1.17eV which is relevant for cosmological observations and explain the different neutrino oscillations data.
Advances in High Energy Physics, 2019
Inspired by the experimental anomalies in neutrino physics and recent oscillation data from short... more Inspired by the experimental anomalies in neutrino physics and recent oscillation data from short baseline and another neutrino experiment, the realization of one extra neutrino flavor seems to be favoring. This extra flavor may change the observable, |mββ|, of current data taking and next-generation (ββ)0ν-decay experiments aim to probe and possibly look at the Inverted Ordering region (|mββ|≃10-2eV) of parameter space. This observation would allow establishing physics beyond the standard model and phenomena like lepton number violation and Majorana nature of neutrino. The range of this observable (|mββ|) is not very well defined for both the ordering of mass spectrum (Normal Ordering and Inverted Ordering). Several attempts have been made for defining exactly the range for three active neutrino states. For contrasting this range, I have worked with an extra mass state, ν4, and its effect on the observable with various combinations of CP violation Majorana phases by taking into acc...
Energy reconstruction of very high energy muons originating from cosmogenic neutrinos 1 and very ... more Energy reconstruction of very high energy muons originating from cosmogenic neutrinos 1 and very high energy cosmic rays. Searches for Weakly Interacting Massive Particles (WIMPs) using neutrino-induced upward-going muons, as done by Super-Kamiokande 2. This kind of multimessenger astronomy works at the TeV scale and are being tested with IceCube 3 and SK. DUNE far detector (FD) may also be used to detect high-energy (TeV range) muons.
Cornell University - arXiv, Nov 2, 2022
CERN European Organization for Nuclear Research - Zenodo, Aug 17, 2022
International Journal of Theoretical Physics
The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement ... more The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement of neutrino mixing parameters and the confirmation of the mass hierarchy. The systematic inaccuracy in the cross-section models introduces inaccuracy in the neutrino mixing parameters estimation. It is important to secure a large decrease of uncertainties, particularly those related to cross-section, neutrino-nucleus interactions, and neutrino energy reconstruction, in order to achieve these ambitious goals. In this research article, we use three alternative neutrino event generators, GENIE, NuWro, and GiBUU, to analyze the sensitivity studies of T2HK, DUNE, and combined sensitivity of DUNE, and T2HK for mass hierarchy, CP violation, and octant degeneracy caused by cross-section uncertainties. The cross-section models of these generators are separate and independent.
Le Centre pour la Communication Scientifique Directe - HAL - Paris Observatory, Jul 18, 2022
The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic es... more The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic essential to the reconstruction of particle interactions in liquid argon time projection chamber detectors. Pandora is the primary event reconstruction software used at ProtoDUNE-SP, a prototype for the Deep Underground Neutrino Experiment far detector. ProtoDUNE-SP, located at CERN, is exposed to a charged-particle test beam. This paper gives an overview of the Pandora reconstruction algorithms and how they have been tailored for use at ProtoDUNE-SP. In complex events with numerous cosmic-ray and beam background particles, the simulated reconstruction and identification efficiency for triggered test-beam particles is above 80% for the majority of particle type and beam momentum combinations. Specifically, simulated 1 GeV/c charged pions and protons are correctly reconstructed and identified with efficiencies of 86.1±0.6% and 84.1±0.6%, respectively. The efficiencies measured for test-beam data are shown to be within 5% of those predicted by the simulation.
The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement ... more The ultimate objectives of ongoing and upcoming neutrino experiments are the precise measurement of neutrino mixing parameters and the confirmation of mass hierarchy. The systematic inaccuracy in the cross-section models introduces inaccuracy in the neutrino mixing parameters estimation. It is important to secure a large decrease of uncertainties, particularly those relating to cross-section, neutrino-nucleus interactions, and neutrino-energy reconstruction, in order to achieve these ambitious goals. In this research article, we use three alternative neutrino event generators, GENIE, NuWro, and GiBUU, to analyze sensitivity studies of T2HK, DUNE, and combined sensitivity of DUNE, and T2HK for mass hierarchy, CP violation, and octant degeneracy caused by cross-section uncertainties. The cross-section models of these generators are separate and independent.
Brazilian Journal of Physics
To achieve appropriate interaction rates in recent neutrino oscillation studies, high atomic numb... more To achieve appropriate interaction rates in recent neutrino oscillation studies, high atomic number nuclear targets were utilized. Because of the nuclear effects in the experimental observable, the utilization of these complicated targets produced systematic uncertainties that needed to be assessed accurately to constrain the discovery. We made an effort to calculate the nuclear effects in the Ar and H targets, which are intended to be employed at the DUNE distant and near detectors, respectively, through our simulation effort. The DUNE flux is peaking around 2.5 GeV and CCRES is the dominant process at this energy. So, this work will be focused only on the CCQE and CCRES interactions and the simulations will be done using two different neutrino event generators. We reported the ratio of the oscillation probability (P(Ar)/P(H) as a function of reconstructed neutrino energy for CCRES channels to quantify the systematic errors in the observables.
Ukrainian Journal of Physics, 2022
Recent neutrino oscillation experiments used high atomic number nuclear targets to attain suffici... more Recent neutrino oscillation experiments used high atomic number nuclear targets to attain sufficient interaction rates. The use of these complex targets introduced systematic uncertainties due to the nuclear effects in the experimental observables and need to be measured properly to pin down the discovery. Through this simulation work, we are trying to quantify the nuclear effects in the argon (Ar) target in comparison to hydrogen (H) target which are proposed to be used at Deep Underground Neutrino Experiment far detector and near detector, respectively. Generated Events for Neutrino Interaction Experiments and NuWro, two neutrino event generators, are used to construct final state kinematics. To quantify the systematic uncertainties in the observables, we present the ratio of the oscillation probabilities (P(Ar)/P(H)) as a function of the reconstructed neutrino energy.
Springer Proceedings in Physics, 2021
The precise measurement of neutrino oscillation parameters is one of the highest priorities in ne... more The precise measurement of neutrino oscillation parameters is one of the highest priorities in neutrino oscillation physics. To achieve the desired precision, it is necessary to reduce the systematic uncertainties related to neutrino energy reconstruction. An error in energy reconstruction is propagated to all the oscillation parameters; hence, a careful estimation of neutrino energy is required. To increase the statistics, neutrino oscillation experiments use heavy nuclear targets like Argon (Z=18). The use of these nuclear targets introduces nuclear effects that severely impact the neutrino energy reconstruction which in turn poses influence in the determination of neutrino oscillation parameters. In this work we have tried to study the impact of nuclear effects on the determination of CP phase at DUNE using final state interactions.
Cosmic rays primarily composed of high energy protons and atomic nuclei which interact with the e... more Cosmic rays primarily composed of high energy protons and atomic nuclei which interact with the earth’s atmospheric nuclei and produce pions and kaons, these particles further decay to muons. The charge ratio of these energetic muons is an important measurable which carries information about (i) pi/k hadronic production ratio (ii) Composition of cosmic ray primaries (iii) Contribution of charmed hadrons (iv) Neutrino flux at very high energies etc. Measurement of this ratio up to tens of TeV has been made by several experiments(MINOS (Adamson et al., Phys Rev, D76:052003, (2007), [4]), OPERA (Agafonova et al., Eur Phys J, C67:25,(2010), [5]), CMS (Khachatryan et al., Phys Lett, B692:83, (2010), [6]) etc.). The proposed ICAL detector at INO (Chatterjee et al., JINST, 9(2014):PO7001, (2014), [1]) is a large underground magnetized iron detector. This detector is shielded by 1.2 Km of rock(approx). When the muons produced in the atmosphere pass through rock, low energy muons are stopped...
Recent neutrino oscillation experiments used high atomic number nuclear targets to attain suffici... more Recent neutrino oscillation experiments used high atomic number nuclear targets to attain sufficient interaction rates. The use of these complex targets introduced systematic uncertainties due to the nuclear effects in the experimental observable and need to be measured properly to pin down the discovery. Through this simulation work, we are trying to quantify the nuclear effects in the Ar target in comparison to H target which are proposed to be used at DUNE far detector and near detector respectively. GENIE and NuWro, two neutrino event generators, are used to construct final state kinematics. To quantify the systematic uncertainties in the observables, we present the ratio of the oscillation probability (P(Ar)/P(H)) as a function of reconstructed neutrino energy.
arXiv: Nuclear Theory, 2019
Different neutrino oscillation experiments use nuclear targets for the study of exotic physics. N... more Different neutrino oscillation experiments use nuclear targets for the study of exotic physics. Nuclear effects are introduced in the experimental environment by the use of these targets and need to be quantified as they add to the systematic errors. In low energy region(around 1 GeV) multi-nucleon events are present along with QE and Delta interactions. Therefore if these multinucleon events are not incorporated in the data set properly, we end up with an inaccurate reconstruction of neutrino energy. In our work, we have illustrated the importance of incorporation of multinucleon events for the reduction of systematic errors in physics predictions for DUNE. To achieve this we have presented the event distribution ratio of Ar/C, Ar/Ar and C/C as a function of squared four momentum transfer by employing different nuclear models. This analysis recommends the addition of 2p2h or multinucleon events in the event sample and promotes model with RPA effect for the analysis of the event sam...
Instruments, 2021
The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed... more The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. DUNE will study questions pertaining to the preponderance of matter over antimatter in the early universe, the dynamics of supernovae, the subtleties of neutrino interaction physics, and a number of beyond the Standard Model topics accessible in a powerful neutrino beam. A critical component of the DUNE physics program involves the study of changes in a powerful beam of neutrinos, i.e., neutrino oscillations, as the neutrinos propagate a long distance. The experiment consists of a near detector, sited close to the source of the beam, and a far detector, sited along the beam at a large distance. This document, the DUNE Near Detector Conceptual Design Report (CDR), describes the design of the DUNE near detector and the science program that drives the design and te...