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The Search For Neutrinoless Double Beta Decay With 130te With Cuore 0
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Book Synopsis The Search for Neutrinoless Double Beta Decay with 130Te with CUORE-0 by :
Download or read book The Search for Neutrinoless Double Beta Decay with 130Te with CUORE-0 written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the design, operation and results of an experimental search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^$Te using the CUORE-0 detector. The discovery of 0$\nu\beta\beta$ would have profound implications for particle physics and our understanding of the Universe. Its discovery would demonstrate the violation of lepton number and imply that neutrinos are Majorana fermions and therefore their own anti-particles. Combined with other experimental results, the discovery of 0$\nu\beta\beta$ could also have implications for understanding the absolute neutrino mass scale as well as the presently unknown neutrino mass hierarchy. The CUORE experiment is a ton-scale search for 0$\nu\beta\beta$ in $^$Te expected to begin operation in late 2015. The first stage of this experiment is a smaller 39-kg active-mass detector called CUORE-0. This detector contains 11~kg of $^$Te and operates in the Laboratori Nazionali del Gran Sasso lab in Italy from 2013 -- 2015. The results presented here are based on a $^\text{nat}$TeO$_2$ exposure of 35.2~kg$\cdot$yr, or 9.8~kg$\cdot$yr exposure of $^$Te collected between 2013 -- 2015. We see no evidence of 0$\nu\beta\beta$ and place an upper limit on the 0$\nu\beta\beta$ decay rate of $\Gamma_\text{0$\nu\beta\beta$}0.25\times10^{-24}$~yr$^{-1}$ (90\% C.L.), corresponding to a lower limit on the half-life of $T^{0\nu}_1/22.8\times10^{24}$~yr (90\% C.L.). We combine the present result with the results of previous searches in $^$Te. Combining it with the 1.2~kg$\cdot$yr $^$Te exposure from the Three Towers Test run we place a half-life limit of $T_1/2^{0\nu}>3.3\times10^{24}$~yr (90\% C.L.). And combining these results with the 19.75~kg$\cdot$yr $^$Te exposure from CUORE-0ino, we place the strongest limit on the 0$\nu\beta\beta$ half-life of $^$Te to date, at $T^{0\nu}_1/2>4.5\times10^{24}$~yr (90\% C.L.). Using the present nuclear matrix element calculations for $^$Te, this result corresponds to a 90\% upper limit range on the effective Majorana mass of $m_{\beta\beta}
Book Synopsis Searching for Neutrinoless Double-Beta Decay of 130Te with CUORE. by :
Download or read book Searching for Neutrinoless Double-Beta Decay of 130Te with CUORE. written by and published by . This book was released on 2015 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Neutrinoless Double-Beta Decay of with CUORE-0 by :
Download or read book Search for Neutrinoless Double-Beta Decay of with CUORE-0 written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of 130Te using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are 5.1 ± 0.3 keV FWHM and 0.058 ± 0.004 (stat.) ± 0:002 (syst.) counts/(keV kg yr), respectively. The median 90% C.L. lower-limit sensitivity of the experiment is 2.9 x 1024 yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of 130Te and place a Bayesian lower bound on the decay half-life, T0$_1$1/2 > 2.7 x 1024 yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of 130Te from the Cuoricino experiment we obtain T0$_1$1/2 > 4.0 x 1024 yr at 90% C.L. (Bayesian), the most stringent limit to date on this half-life. Using a range of nuclear matrix element estimates we interpret this as a limit on the effective Majorana neutrino mass, m??
Book Synopsis Searching for Neutrinoless Double-Beta Decay of 130 Te with CUORE. by :
Download or read book Searching for Neutrinoless Double-Beta Decay of 130 Te with CUORE. written by and published by . This book was released on 2015 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Neutrinoless Double-Beta Decay of Te130 with CUORE-0 by :
Download or read book Search for Neutrinoless Double-Beta Decay of Te130 with CUORE-0 written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of 130Te using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are 5:1± 0:3 keV FWHM and 0:058 ± 0:004 (stat) ± 0:002 (syst) counts / (keV kg yr), respectively. The median 90% C.L. lower-limit half-life sensitivity of the experiment is 2:9x1024 yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of 130Te and place a Bayesian lower bound on the decay half-life, T0[nu]1/2> 2.7 x 1024 yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of 130Te from the Cuoricino experiment we obtain T0[nu]1/2> 4.0 x 1024 yr at 90% C.L. (Bayesian), the most stringent limit to date on this half-life. Lastly, using a range of nuclear matrix element estimates we interpret this as a limit on the e ective Majorana neutrino mass, m[beta][beta]
Book Synopsis Analysis Techniques for the Evaluation of the Neutrinoless Double-[beta] Decay Lifetime in 130Te with the CUORE-0 Detector by :
Download or read book Analysis Techniques for the Evaluation of the Neutrinoless Double-[beta] Decay Lifetime in 130Te with the CUORE-0 Detector written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we describe in detail the methods used to obtain the lower bound on the lifetime of neutrinoless double-beta (0[nu][beta][beta]) decay in 130Te and the associated limit on the effective Majorana mass of the neutrino using the CUORE-0 detector. CUORE-0 is a bolometric detector array located at the Laboratori Nazionali del Gran Sasso that was designed to validate the background reduction techniques developed for CUORE, a next-generation experiment scheduled to come online in 2016. CUORE-0 is also a competitive 0[nu][beta][beta] decay search in its own right and functions as a platform to further develop the analysis tools and procedures to be used in CUORE. These include data collection, event selection and processing, as well as an evaluation of signal efficiency. In particular, we describe the amplitude evaluation, thermal gain stabilization, energy calibration methods, and the analysis event selection used to create our final 0[nu][beta][beta] search spectrum. We define our high level analysis procedures, with emphasis on the new insights gained and challenges encountered. We outline in detail our fitting methods near the hypothesized 0[nu][beta][beta] decay peak and catalog the main sources of systematic uncertainty. Finally, we derive the 0[nu][beta][beta] decay half-life limits previously reported for CUORE-0, T0[nu]1/2> 2.7×1024yr, and in combination with the Cuoricino limit, T0[nu]1/2> 4.0×1024yr.
Book Synopsis The Search for Neutrinoless Double Beta Decay in $^$Te With CUORE-0 by : Jonathan Loren Ouellet
Download or read book The Search for Neutrinoless Double Beta Decay in $^$Te With CUORE-0 written by Jonathan Loren Ouellet and published by . This book was released on 2015 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the design, operation and results of an experimental search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^$Te using the CUORE-0 detector. The discovery of 0$\nu\beta\beta$ would have profound implications for particle physics and our understanding of the Universe. Its discovery would demonstrate the violation of lepton number and imply that neutrinos are Majorana fermions and therefore their own anti-particles. Combined with other experimental results, the discovery of 0$\nu\beta\beta$ could also have implications for understanding the absolute neutrino mass scale as well as the presently unknown neutrino mass hierarchy. The CUORE experiment is a ton-scale search for 0$\nu\beta\beta$ in $^$Te expected to begin operation in late 2015. The first stage of this experiment is a smaller 39-kg active-mass detector called CUORE-0. This detector contains 11~kg of $^$Te and operates in the Laboratori Nazionali del Gran Sasso lab in Italy from 2013 -- 2015. The results presented here are based on a $^\text{nat}$TeO$_2$ exposure of 35.2~kg$\cdot$yr, or 9.8~kg$\cdot$yr exposure of $^$Te collected between 2013 -- 2015. We see no evidence of 0$\nu\beta\beta$ and place an upper limit on the 0$\nu\beta\beta$ decay rate of $\Gamma_{0\nu\beta\beta}0.25\times10^{-24}$~yr$^{-1}$ (90\% C.L.), corresponding to a lower limit on the half-life of $T^{0\nu}_{1/2}2.8\times10^{24}$~yr (90\% C.L.). We combine the present result with the results of previous searches in $^$Te. Combining it with the 1.2~kg$\cdot$yr $^$Te exposure from the Three Towers Test run we place a half-life limit of $T_{1/2}^{0\nu}>3.3\times10^{24}$~yr (90\% C.L.). And combining these results with the 19.75~kg$\cdot$yr $^$Te exposure from CUORE-0ino, we place the strongest limit on the 0$\nu\beta\beta$ half-life of $^$Te to date, at $T^{0\nu}_{1/2}>4.5\times10^{24}$~yr (90\% C.L.). Using the present nuclear matrix element calculations for $^$Te, this result corresponds to a 90\% upper limit range on the effective Majorana mass of $m_{\beta\beta}
Book Synopsis Neutrinoless Double-beta Decay Search with CUORE and CUORE-0 Experiments by :
Download or read book Neutrinoless Double-beta Decay Search with CUORE and CUORE-0 Experiments written by and published by . This book was released on 2015 with total page 3004 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment designed to search for the neutrinoless double-beta decays. Observation of the process would unambiguously establish that neutrinos are Majorana particles and provide information on their absolute mass scale hierarchy. CUORE is now under construction and will consist of an array of 988 TeO2 crystal bolometers operated at 10 mK, but the first tower (CUORE-0) is already taking data. The experimental techniques used will be presented as well as the preliminary CUORE-0 results. The current status of the full-mass experiment and its expected sensitivity will then be discussed.
Book Synopsis Background Model and a Measurement of the 2nbb Decay Rate in 130Te with CUORE-0 by : Xiaoyu Zhu
Download or read book Background Model and a Measurement of the 2nbb Decay Rate in 130Te with CUORE-0 written by Xiaoyu Zhu and published by . This book was released on 2016 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: CUORE is a ton-scale cryogenic bolometer experiment designed to search for neutrinoless double beta decay ($0\nu\beta\beta$) in $^{130}$Te. CUORE-0 was a single array experiment consisting of 11 kg of $^{130}$Te and was designed to test the detector construction and analysis techniques for CUORE. CUORE-0 operated from 2013 to 2015 in the Laboratori Nazionali del Gran Sasso in Italy and collected a data sample of 9.8 kg$\cdot$yr of $^{130}$Te. This dissertation will focus on a method for reconstructing the background spectrum and extracting the two neutrino double beta decay ($2\nu\beta\beta$) signal of $^{130}$Te in CUORE-0. Identifying and reducing the most significant background contributions are keys to improving the sensitivity of future $0\nu\beta\beta$ experiments. The background spectrum of CUORE-0 was fit using the spectra of radioactive contaminants generated by Monte Carlo simulations and the $2\nu\beta\beta$ half-life was measured to be $T^{2\nu}_{1/2} = (8.27^{+1.38}_{-0.99} \text{(stat+syst)})\times10^{20} \text{ yr}$
Book Synopsis Measurement of the Two-neutrino Double-beta Decay Half-life of $^$Te with the CUORE-0 Experiment by :
Download or read book Measurement of the Two-neutrino Double-beta Decay Half-life of $^$Te with the CUORE-0 Experiment written by and published by . This book was released on 2017 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we report on the measurement of the two-neutrino double-beta decay half-life of 130Te with the CUORE-0 detector. From an exposure of 33.4 kg year of TeO2, the half-life is determined to be T2[nu]1/2 = [8.2 ± 0.2 (stat.) ± 0.6 (syst.)] × 1020 year. This result is obtained after a detailed reconstruction of the sources responsible for the CUORE-0 counting rate, with a specific study of those contributing to the 130Te neutrinoless double-beta decay region of interest.
Book Synopsis Cosmogenic Activation of TeO2 in the Neutrinoless Double-Beta Decay Experiment CUORE by : Barbara Sue Wang
Download or read book Cosmogenic Activation of TeO2 in the Neutrinoless Double-Beta Decay Experiment CUORE written by Barbara Sue Wang and published by . This book was released on 2014 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment that will search for neutrinoless double-beta (0 & nu & beta & beta) decay of 130Te and other rare processes. Observing 0 & nu & beta & beta decay would establish that neutrinos are massive Majorana fermions, demonstrate that lepton number is not conserved, and constrain the neutrino mass scale and hierarchy. The CUORE detector, currently being constructed underground at the Gran Sasso National Laboratory in Italy, is an array of 988 high-resolution TeO2 bolometers. Each bolometer is comprised of a thermistor and a TeO2 crystal that serves as both the source and the detector of 0 & nu & beta & beta decay. The 0 & nu & beta & beta decay signature for 130Te is a peak at the Q-value 2528 keV. Observation of 0 & nu & beta & beta decay requires that the background at the peak be ultra-low. Background-source identification and characterization are therefore extremely important. One source of background that is poorly characterized is activation of the TeO2 crystals by sea-level cosmic-ray neutrons. This process, known as cosmogenic activation, produces long-lived radioisotopes that can obscure the 0 & nu & beta & beta peak. Existing cross-section data is insufficient to estimate this background; therefore, an additional cross-section measurement has been performed in which a TeO2 target was irradiated with a neutron spectrum similar to that of cosmic-ray neutrons at sea-level. Analysis of the radionuclides produced reveals that 110mAg will dominate the cosmogenic activation background in CUORE. Estimations using the measured cross section for 110mAg indicate this source will be negligible compared with other contributions to the CUORE background.
Book Synopsis Investigation of Background Sources and Search for Neutrinoless Double-beta Decay in CUORE by : Krystal Alfonso
Download or read book Investigation of Background Sources and Search for Neutrinoless Double-beta Decay in CUORE written by Krystal Alfonso and published by . This book was released on 2022 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The CUORE and CUORE-0 Experiments at Gran Sasso by :
Download or read book The CUORE and CUORE-0 Experiments at Gran Sasso written by and published by . This book was released on 2015 with total page 4024 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay (0[nu][beta][beta]) in 130Te and other rare processes. CUORE is a cryogenic detector composed of 988 TeO2 bolometers for a total mass of about 741 kg. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/(keV·kg·y) will be reached, in five years of data taking CUORE will have an half life sensitivity around 1 × 1026 y at 90% C.L. As a first step towards CUORE a smaller experiment CUORE-0, constructed to test and demonstrate the performances expected for CUORE, has been assembled and is running. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.
Book Synopsis Sensitivity of CUORE to Neutrinoless Double-Beta Decay by :
Download or read book Sensitivity of CUORE to Neutrinoless Double-Beta Decay written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we study the sensitivity of CUORE, a bolometric double-beta decay experiment under construction at the Laboratori Nazionali del Gran Sasso in Italy. Two approaches to the computation of experimental sensitivity are discussed and compared, and the formulas and parameters used in the sensitivity estimates are provided. Assuming a background rate of 10−2 cts/(keV kg y), we find that, after 5 years of live time, CUORE will have a 1 [sigma] sensitivity to the neutrinoless double-beta decay half-life of {caret T{sup 0[nu]}{sub 1/2}}(1[sigma]) = 1.6x 1026 y and thus a potential to probe the effective Majorana neutrino mass down to 41-95 meV; the sensitivity at 1.64[sigma], which corresponds to 90% C.L., will be {caret T{sup 0[nu]}{sub 1/2}(1.64[sigma] }) = 9.5x1025 y. This range is compared with the claim of observation of neutrinoless double-beta decay in 76Ge and the preferred range in the neutrino mass parameter space from oscillation results.
Download or read book IGISOL written by Juha Äystö and published by Springer Science & Business Media. This book was released on 2014-01-23 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IGISOL group at the University of Jyväskyla studies the properties of nuclei far off the line of beta stability. These studies are performed locally at the Jyväskylä Ion Guide Isotope Separator On-Line (IGISOL) facility, as well as at a number of other laboratories such as the ISOLDE facility in CERN, at GANIL and in Helmholzzentrum GSI, the location of the future radioactive beam facility FAIR. The group is also actively involved in work to support the development of international future facilities EURISOL and aforementioned FAIR. This book presents carefully selected papers to portrait the work at IGISOL. Previously published in the journals Hyperfine Interactions and European Physical Journal A.
Book Synopsis Searching for the 0νββ Decay of 130Te with the Ton-Scale CUORE Bolometer Array by : Alexey Drobizhev
Download or read book Searching for the 0νββ Decay of 130Te with the Ton-Scale CUORE Bolometer Array written by Alexey Drobizhev and published by . This book was released on 2018 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: CUORE--the Cryogenic Underground Observatory for Rare Events--is an experiment searching for the neutrinoless double-beta ($0\nu\beta\beta$) decay of $^$Te, based at the Laboratori Nazionali del Gran Sasso in Italy. The detector consists of 988 5$\times$5$\times$5 cm$^3$ TeO$_2$ crystals operated as bolometers at temperatures of $\sim$10 mK inside the world's largest and most powerful dilution refrigerator. CUORE began physics data collection in the spring of 2017, and has recently released its first limit on the $0\nu\beta\beta$ decay half-life of $^$Te from 24 kg $\cdot$ y isotope exposure ($\sim$2 months live time). This result--T$^{0\nu}_{1/2} > 1.5 \cdot 10^{25}$ y (Bayesian) and T$^{0\nu}_{1/2} > 2.3 \cdot 10^{25}$ y (Frequentist) at $90 \%$ C.L.--is the most stringent to date and, together with two alternative analyses necessary to calculate it, forms the centerpiece of this thesis. In the future, with five years of live time, CUORE is projected to reach a median sensitivity of $9 \cdot 10^{25}$ y on this half-life. Besides the main physics conclusions, in this work I present an analysis modeling the spectral line shape of the bolometer, which is used for constructing the region of interest fit PDF. Additionally, I discuss the major CUORE hardware projects to which I have contributed in a significant way. Specifically, these are our world-leading cryostat, a cryogenic feedback temperature control system, a radon-free detector installation environment, and a room temperature detector calibration system.
Book Synopsis A Search for Neutrinoless Double Beta Decay of Te-130 by : Adam Douglas Bryant
Download or read book A Search for Neutrinoless Double Beta Decay of Te-130 written by Adam Douglas Bryant and published by . This book was released on 2010 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Analysis Techniques for the Evaluation of the Neutrinoless Double-[beta] Decay Lifetime in 130Te with the CUORE-0 Detector PDF Online Free](https://books.google.com/books/content/images/frontcover/nX4RuAEACAAJ?fife=w200-h370)
