Apeksha Singhal M.Sc.
|Apeksha Singhal M.Sc.
- 2018-2020, M.Sc. in Physics
RWTH Aachen university
Master Thesis: Observation of CNO solar neutrinos with the Borexino Experiment
- 2015-2018, B.Sc. in Physics
Hansraj College, University of Delhi, India
Research Activity: Borexino
Spectroscopy of CNO solar neutrinos
My work concentrates towards the preparation of data and Monte Carlo inputs for the final fit, performing the spectral fits and the determination of 210Bi constraint parameters for the improved CNO solar neutrinos measurement. The contributions are used for this publication.
During my Master's thesis, I was involved in the first experimental evidence of CNO solar neutrinos. The contributions from the thesis were used for the publication in Nature.
Directionality of solar neutrinos
For the first time, the directional measurement of sub-MeV solar neutrinos has been achieved in a liquid scintillator detector, using first few hits due to Cherenkov light emission from an event with the Borexino Experiment, using the "Correlated and Integrated Directionality" (CID) technique. My work regarding this analysis includes the optimisation of fit parameters, the study of directional distribution of backgrounds using the toy Monte Carlo simulations and the evaluation of associated systematic contributions. These contributions were used for these publications: short letter and a long article.
Recently, the measurement of CNO solar neutrinos using CID technique without using a constraint on 210Bi background rate has been performed. The results on CNO using CID is then applied as external constraint to the spectral fit. I have collaborated with Johann Martyn from JGU Mainz group in performing CID analysis for CNO neutrinos measurement. My contribution involves preparation and optimisation of fit inputs, doing the fits for calibrating group velocity of Cherenkov photons and for extracting CNO solar neutrinos, performing the checks, evaluation of systematic uncertainties and co-writing the article. These contributions were used for this publication.
Research Activity: JUNO
I joined JUNO collaboration in September 2021. I was involved in the JUNO's sensitivity towards the measurement of Be7, pep and CNO solar neutrinos. My contributions are the estimation of reactor anti-neutrino background rate, doing the spectral fits to estimate the precision of rates of Be7, pep and CNO solar neutrinos that can be reached in the presence of different level of background contaminations in JUNO detector and co-writing the article. These contributions were used for this publication.
Furthermore, the estimation of JUNO's sensitivity towards the measurement of solar neutrinos using combined CID technique and the spectral fit is currently in investigation.
Tutor for Elementary Particle Physics II for Master Students, RWTH Aachen University (2021): Neutrino Physics
Talks and Posters
Parallel Talk: JUNO's sensitivity to 7Be, pep and CNO solar neutrinos
Parallel Talk: Combined directional and spectral analysis of solar neutrinos from Carbon-Nitrogen-Oxygen fusion cycle with Borexino Experiment
Parallel Talk: JUNO's sensitivity to 7Be, pep and CNO solar neutrinos and strategy for directional analysis of CNO solar neutrinos in JUNO
Flash talk: Recent results from Borexino: measurement of CNO solar neutrinos and directionality of sub-MeV solar neutrinos
Seminar talk: Update on ongoing CNO analysis with Borexino
Parallel talk: Recent results from Borexino: measurement of CNO solar neutrinos and directionality of sub-MeV solar neutrinos
Seminar talk: Updated CNO solar neutrino measurement with Borexino: analysis strategy and implication on solar physics
Poster: First directional measurement of sub-MeV solar neutrinos in the liquid scintillator detector by Borexino
Parallel talk: Analysis strategies used in the directional analysis of sub-MeV solar neutrinos in a liquid scintillator detector
Seminar talk: First directional measurement of sub-MeV solar neutrinos in a liquid scintillator detector
Plenary talk: First experimental proof of CNO fusion cycle in Sun with the Borexino Experiment
Poster: First directional detection of sub-MeV solar neutrinos in the liquid scintillator detector by Borexino
Poster: Understanding the systematic effects for the directional measurement of Be-7 solar neutrinos with Borexino
Parallel talk: Strategy used in CNO solar neutrinos analysis with the Borexino Experiment