Monte Carlo Simulation for the Majorana Neutrinoless Double-betaDecay Experiment PDF Download
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Author: Reyco Henning Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Majorana experiment is a proposed HPGe detector array that will primarily search for neutrinoless double-beta decay and dark matter. It will rely on pulse-shape discrimination and crystal segmentation to suppress backgrounds following careful materials selection. A critical aspect of the design phase of Majorana is a reliable simulation of the detector response, pulse formation, and its radioactive backgrounds. We are developing an adaptable and complete simulation based on GEANT 4 to address these requirements and the requirements of a modern, large collaboration experiment. The salient aspects of the simulation are presented. The Majorana experiment is presented in a parallel poster by Kareem Kazkaz.
Author: Reyco Henning Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Majorana experiment is a proposed HPGe detector array that will primarily search for neutrinoless double-beta decay and dark matter. It will rely on pulse-shape discrimination and crystal segmentation to suppress backgrounds following careful materials selection. A critical aspect of the design phase of Majorana is a reliable simulation of the detector response, pulse formation, and its radioactive backgrounds. We are developing an adaptable and complete simulation based on GEANT 4 to address these requirements and the requirements of a modern, large collaboration experiment. The salient aspects of the simulation are presented. The Majorana experiment is presented in a parallel poster by Kareem Kazkaz.
Author: Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
The performance of the MOON detector for a next-generation neutrino-less double-beta decay experiment was evaluated by means of the Monte Carlo method. The MOON detector was found to be a feasible solution for the future experiment to search for the Majorana neutrino mass in the range of 100-30 meV.
Author: Veronika Palušová Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Presented dissertation thesis is focused on Monte Carlo simulations of background induced by high energy gamma rays in the SuperNEMO experiment.The discovery of neutrino masses through the observation of neutrino oscillations renewed the interest in neutrinoless double beta decay searches. They can probe lepton number conservation and investigate the nature of the neutrinos - Dirac or Majorana - and also probe their absolute mass scale. SuperNEMO experiment aims to search for the signal of neutrinoless double beta decay. It utilizes a tracking approach by separating the source isotope from the detector, while combining tracker and calorimetry techniques to detect emitted electrons independently. The first module of the experiment, the Demonstrator, is located in Modane underground laboratory. Its background suppression technique is based on rejection method by reconstructing the topology of events and on background suppression by selecting radiopure materials used in detector construction and passive shielding.Part of the thesis is dedicated to evaluation of different sources of background, namely ambient background sources in the Modane underground laboratory that are unavoidable to all experiments operating here, and radiogenic sources of neutrons produced in fission processes of uranium and thorium, and in (alpha,n) reactions. This part represents an important component of inputs used for Monte Carlo simulation of the background induced by high energy gamma rays. A problem with simulation of gamma cascades emitted after thermal neutron capture in the software package along with the solution of this problem is discussed.Another part is dedicated to simulations of attenuation of radiation passing through different shielding configurations and geometries. This study helps to optimize the final design of passive shielding used for the Demonstrator module.All these parts are then used as inputs for the final Monte Carlo simulations of external background in the SuperNEMO experiment.The main goal of this task is to study and to identify events that mimic the 2 electron topology of neutrinoless double beta decay.
Author: Hans Volker Klapdor-Kleingrothaus Publisher: World Scientific ISBN: 9812832351 Category : Science Languages : en Pages : 1559
Book Description
In the last 20 years the disciplines of particle physics, astrophysics, nuclear physics and cosmology have grown together in an unprecedented way. A brilliant example is nuclear double beta decay, an extremely rare radioactive decay mode, which is one of the most exciting and important fields of research in particle physics at present and the flagship of non-accelerator particle physics. While already discussed in the 1930s, only in the 1980s was it understood that neutrinoless double beta decay can yield information on the Majorana mass of the neutrino, which has an impact on the structure of space-time. Today, double beta decay is indispensable for solving the problem of the neutrino mass spectrum and the structure of the neutrino mass matrix. The potential of double beta decay has also been extended such that it is now one of the most promising tools for probing beyond-the-standard-model particle physics, and gives access to energy scales beyond the potential of future accelerators. This book presents the breathtaking manner in which achievements in particle physics have been made from a nuclear physics process. Consisting of a 150-page highly factual overview of the field of double beta decay and a 1200-page collection of the most important original articles, the book outlines the development of double beta decay research theoretical and experimental from its humble beginnings until its most recent achievements, with its revolutionary consequences for the theory of particle physics. It further presents an outlook on the exciting future of the field.
Author: Alexis G. Schubert Publisher: ISBN: Category : Languages : en Pages : 350
Book Description
The neutrino, an elementary particle, has been the subject of experimental investigation for over 50 years. Recent experiments have shown that neutrinos have mass and oscillate, but questions about fundamental properties of the neutrino remain. The observation of neutrinoless double-beta decay could determine whether lepton number is violated, discover whether the neutrino is its own antiparticle, and provide information about the absolute scale of neutrino mass. The MAJORANA Collaboration will search for neutrinoless double-beta decay of germanium-76 in an array of germanium detectors. Previous experiments indicate that the half life of this decay mode is greater than 1025 years. To be sensitive to this rate, MAJORANA must construct an ultra-low-background detector. MAJORANA is building the DEMONSTRATOR, a 40-kg detector array, at the Sanford Underground Research Facility in Lead, South Dakota. The neutrinoless double-beta decay of 76-Ge would produce 76-Se and two electrons with 2039 keV of energy. The physics reach of the DEMONSTRATOR will be determined by the background count rate in a 4-keV energy region surrounding the 2039-keV Q-value. MAJORANA has a background goal of less than three counts in the energy region of interest per tonne-year of DEMONSTRATOR exposure. Projections of the DEMONSTRATOR's sensitivity are determined from a background energy-spectrum model based on material assay data and Monte Carlo simulation results. Understanding and minimization of backgrounds is critical to the success of the DEMONSTRATOR. MAJORANA Collaborators operate a low-background detector in a shielded environment at the Kimballton Underground Research Facility near Ripplemeade, Virginia. The contents of the detector cryostat are well known, making it a good candidate for testing the MAJORANA background model. This dissertation describes the creation of a background energy- spectrum model for the Kimballton detector. Energy spectra measured with the detector at Kimballton are compared to results of the background model, and implications for the DEMONSTRATOR are explored.
Author: Guido Altarelli Publisher: Springer ISBN: 3540449019 Category : Science Languages : en Pages : 0
Book Description
Reviews the current state of knowledge of neutrino masses and the related question of neutrino oscillations. After an overview of the theory of neutrino masses and mixings, detailed accounts are given of the laboratory limits on neutrino masses, astrophysical and cosmological constraints on those masses, experimental results on neutrino oscillations, the theoretical interpretation of those results, and theoretical models of neutrino masses and mixings. The book concludes with an examination of the potential of long-baseline experiments. This is an essential reference text for workers in elementary-particle physics, nuclear physics, and astrophysics.
Author: Hans Volker Klapdor-kleingrothaus Publisher: World Scientific ISBN: 9814495239 Category : Science Languages : en Pages : 1313
Book Description
Nuclear double beta decay is one of the most promising tools for probing beyond-the-standard-model physics on beyond-accelerator energy scales. It is already now probing the TeV scale, on which new physics should manifest itself according to theoretical expectations. Only in the early 1980s was it known that double beta decay yields information on the Majorana mass of the exchanged neutrino. At present, the sharpest bound for the electron neutrino mass arises from this process. It is only in the last 10 years that the much more far-reaching potential of double beta decay has been discovered. Today, the potential of double beta decay includes a broad range of topics that are equally relevant to particle physics and astrophysics, such as masses of heavy neutrinos, of sneutrinos, as SUSY models, compositeness, leptoquarks, left-right symmetric models, and tests of Lorentz symmetry and equivalence principle in the neutrino sector. Double beta decay has become indispensable nowadays for solving the problem of the neutrino mass spectrum and the structure of the neutrino mass matrix — together with present and future solar and atmospheric neutrino oscillation experiments. Some future double beta experiments (like GENIUS) will be capable to be simultaneously neutrino observatories for double beta decay and low-energy solar neutrinos, and observatories for cold dark matter of ultimate sensitivity.This invaluable book outlines the development of double beta research from its beginnings until its most recent achievements, and also presents the outlook for its highly exciting future.
Author: Reyco Henning
Author: Reyco Henning
Author: 
Author: Veronika Palušová
Author: Hans Volker Klapdor-Kleingrothaus
Author: Joseph Mario Krivicich
Author: Alexis G. Schubert
Author: Robert Scott Moore
Author: Guido Altarelli
Author: 
Author: Hans Volker Klapdor-kleingrothaus