Estimating the Neutron Background Toward the Measurement of Neutrino Mixing Angle [theta]13 with the Double Chooz Detector PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Estimating the Neutron Background Toward the Measurement of Neutrino Mixing Angle [theta]13 with the Double Chooz Detector PDF full book. Access full book title Estimating the Neutron Background Toward the Measurement of Neutrino Mixing Angle [theta]13 with the Double Chooz Detector by Deepak Shrestha. Download full books in PDF and EPUB format.
![Estimating the Neutron Background Toward the Measurement of Neutrino Mixing Angle [theta]13 with the Double Chooz Detector PDF](https://books.google.com/books/content/images/frontcover/TCcQnQAACAAJ?fife=w150-h200)
Author: Deepak Shrestha
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Double Chooz is a reactor neutrino experiment which has shown evidence of electron anti-neutrino disappearance at 1 km distance. It has been able to exclude the no-oscillation hypothesis at 99.8% CL (2.9[sigma]) with only one detector. From a rate plus spectral shape analysis, the value of sin22[theta]13 was found to be 0.109 ± 0.030(stat) ± 0.025(syst). Correlated events mimicking an anti-neutrino event are one of the most important backgrounds for a reactor neutrino experiment like Double Chooz which measured the neutrino mixing angle [theta]13. Cosmic muons passing through the rock surrounding the detector produce fast neutrons which give rise to correlated events through proton recoil followed by a neutron capture. Muons stopping around the chimney region subsequently decay into Michel electrons also contributing to the correlated background. Measurement of the shape and rate of this background is very important for the precise measurement of [theta]13. Experimental techniques to estimate of the shape and rate of this background in the Double Chooz far detector are presented in this thesis.
![Estimating the Neutron Background Toward the Measurement of Neutrino Mixing Angle [theta]13 with the Double Chooz Detector PDF](https://books.google.com/books/content/images/frontcover/TCcQnQAACAAJ?fife=w80-h100)
Author: Deepak Shrestha
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Double Chooz is a reactor neutrino experiment which has shown evidence of electron anti-neutrino disappearance at 1 km distance. It has been able to exclude the no-oscillation hypothesis at 99.8% CL (2.9[sigma]) with only one detector. From a rate plus spectral shape analysis, the value of sin22[theta]13 was found to be 0.109 ± 0.030(stat) ± 0.025(syst). Correlated events mimicking an anti-neutrino event are one of the most important backgrounds for a reactor neutrino experiment like Double Chooz which measured the neutrino mixing angle [theta]13. Cosmic muons passing through the rock surrounding the detector produce fast neutrons which give rise to correlated events through proton recoil followed by a neutron capture. Muons stopping around the chimney region subsequently decay into Michel electrons also contributing to the correlated background. Measurement of the shape and rate of this background is very important for the precise measurement of [theta]13. Experimental techniques to estimate of the shape and rate of this background in the Double Chooz far detector are presented in this thesis.
Author: Brandon Reed White
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
Get Book Here
Book Description
The measurement of the remaining neutrino-mixing angle, [theta]13, is a critical step toward further understanding of neutrino properties and to guide future neutrino oscillation experiments. Double Chooz has a unique opportunity to perform this measurement building on the original CHOOZ reactor anti-neutrino experiment, the experience that set the previous limits on [theta]13. In the first phase of Double Chooz, 101 days of data was analyzed with only the far detector operating of a two-detector plan. In this thesis I will describe the design of the low background neutrino detector and the oscillation analysis performed. From the deficiency between the expected and measured number of electron anti-neutrinos a value of sin2(2[theta]13) = 0.104 ± 0.03(stat) ± 0.076(syst) was found for rate only analysis and 0.086 ± 0.041(stat) ± 0.030(syst) with the rate and spectral energy shape analysis.
Author: David Anselm Stüken
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: David Anselm Stüken
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Igor Ostrovskiy
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 256
Get Book Here
Book Description
The neutrino mixing angle theta-13 is the last one which value is still unknown. This dissertation presents an analysis suggesting a non-zero value of the theta-13. The analysis is based on four months of data taken with the far Double Chooz reactor anti-neutrino detector. Using only rate information yields a best fit value of sin2(2theta-13) equal to 0.0934±0.0785 (1 sigma). Incorporating information on the shape of the signal energy spectrum in the analysis results in a best fit value of 0.0849±0.0509 (1 sigma). Based on frequentist studies, sin2(2theta-13)=0 is excluded at the 92.6% confidence level. The frequentist construction using delta chi-square as an ordering rule gives [0.0098, 0.1825] interval for sin2(2theta-13) at 90% C.L.
![Estimation of the Systematic Uncertainties of the Measurement of the Neutrino Mixing Angle Θ13 [Theta] Related to the Trigger System of the Double Chooz Experiment PDF](https://books.google.com/books/content/images/frontcover/dz_FzQEACAAJ?fife=w80-h100)
Author: David Anselm Stüken
Publisher:
ISBN:
Category :
Languages : en
Pages : 153
Get Book Here
Book Description
Author: Justin Roy Dhooghe
Publisher:
ISBN: 9780355969054
Category :
Languages : en
Pages :
Get Book Here
Book Description
This dissertation provides a complimentary analysis to the official Double Chooz experiment measuring the neutrino mixing angle between the first and third mass eigenstates. Double Chooz is a liquid scintillator experiment consisting of two 8.3 ton cylindrical detectors located approximately 1km and 400m away from two 4.25 GW nuclear reactors in Chooz, France. Using 467 live days of data from the far detector along with 9 months of additional data from the upgraded far detector and the newly commissioned near detector, a best-fit value of sin2(2[theta]13) = 0.1086 ± 0.0112 is obtained. Presented in this analysis is the comparison of theoretical prediction and collected data using new experimentally determined U238 flux measurements, the testing of 8 additional isotopes as an explanation for the [4, 6] MeV event excess and the use of an alternative statistical frameworkusing Bayesian statistics. This work concludes with a discussion of the results’ relation to other [theta]13 experiments and possible insights into the discrepancies.
Author: José Ignacio Crespo Anadón
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: 陳柏安
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Tatsuya Kikawa
Publisher: Springer
ISBN: 9812877150
Category : Science
Languages : en
Pages : 276
Get Book Here
Book Description
This book is based on the author's work in the T2K long-baseline neutrino oscillation experiment, in which neutrinos are generated by a proton beam and are detected by near and far neutrino detectors. In order to achieve the precise measurement of the neutrino oscillation, an accurate understanding of the neutrino beam and the neutrino interaction is essential. Thus, the author measured the neutrino beam properties and the neutrino interaction cross sections using a near neutrino detector called INGRID and promoted a better understanding of them. Then, the author performed a neutrino oscillation analysis using the neutrino beam and neutrino interaction models verified by the INGRID measurements. As a result, some values of the neutrino CP phase are disfavored at the 90% confidence level. If the measurement precision is further improved, we may be able to discover the finite CP phase which involves the CP violation. Thus, this result is an important step towards the discovery of CP violation in the lepton sector, which may be the key to understanding the origin of the matter–antimatter asymmetry in the universe.
