Download or read book Search for Light Dark Matter Interactions Enhanced by the Migdal Effect Or Bremsstrahlung in XENON1T written by Elena Aprile and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Cosmology written by Marilena Streit-Bianchi and published by Springer Nature. This book was released on 2022-12-04 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology’s journey to the present day has been a long one. This book outlines the latest research on modern cosmology and related topics from world-class experts. Through it, readers will learn how multi-disciplinary approaches and technologies are used to search the unknown and how we arrived at the knowledge used and assumptions made by cosmologists today. The book is organized into four parts, each exploring a theme that has troubled humankind for centuries. Since the dawn of time, looking at the sky, humans have tried to understand their origin, the laws governing it, and what influence it all has on human life. In most ancient civilizations, astronomers embodied the power of knowledge. This knowledge was not compartmentalized, and scientists often found philosophical implications within their quests, many of which destroyed the borders between the natural sciences. Even now, as observers and scientists continue to use conjecture to generate theoretical assumptions and laws that then have to be confirmed experimentally, said theoretical and experimental searches are being linked to philosophical thinking and artistic representation, as they were up until the 18th century. This multi-disciplinary book will appeal to anyone with an interest in the fields of Astronomy, Cosmology or Physics.

Download or read book Search for Elastic and Inelastic Dark Matter Interactions in XENON1T and Light Detection for XENONnT written by Adam Michael Brown and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Light Dark Matter Search with Ionization Signals in XENON1T written by Elena Aprile and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Backgrounds in XENON1T written by P. A. Breur and published by . This book was released on 2019 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are missing 85% of the matter in our Universe. This simple statement motivates thousands of physicists around the world to search for and explain dark matter. The first observations suggesting the existence of more non-luminous (e.g., dark matter and neutrinos) than luminous matter (e.g., stars, planets and gas) are now about 100 years old. The XENON1T experiment searches for a specific Dark Matter particle candidate, namely the weakly interacting massive particle (WIMP) with a liquid xenon target in an ultra-low background detector. XENON1T, located at the Laboratori Nazionali del Gran Sasso in Italy, uses 3.2 t of xenon as target material, which is purified and cooled continuously during operation. 248 light detectors are used to measure every particle interaction. To determine if dark matter interactions are found we compare the number of light flashes seen with the number we expect from Monte Carlo simulations. To have a chance of measuring WIMPs scattering off xenon nuclei, XENON1T was designed and built as an ultra-low background experiment. Monte Carlo simulations show that the main background component in the low energy region is from (naturally occurring) radon. This thesis starts with understanding the process of signal reconstruction and data selection in XENON1T to show its amazing performance. The second part is dedicated to determining the concentration and spatial distribution of the main background component. The last part presents the new, and most stringent, constraints on WIMPs in the space of mass versus cross-section. XENON1T is now proudly world leading in finding nothing.

Download or read book Search for Leptonically Interacting Dark Matter with the XENON1T Electronic Recoil Data written by Jean-Philippe Zopounidis and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present thesis, focus on the experimental testing of theories beyond the Standard Model, predicting a specific particle nature for the dark matter (DM) and, specifically, in the effort to directly detect leptonically interacting DM particles with the use of the low-background, underground detector XENON1T. We, initially, investigate the electronic recoil (ER) background in the search of a possible modulation, which is expected due to the relative motion between the Earth and the DM halo. In the absence of observation of WIMP-induced nuclear recoils, an alternative interpretation through a leptophilic DM, finds its place as a natural hypothesis that should be tested, taking advantage of the long-term stability of the ER background of the XENON1T detector. Then, we focus on the search of leptonically interacting DM particles with mass in the sub-GeV scale, emerging in the framework of so-called,”hidden sector" theories, predicting a leptophilic DM with mass in MeV scale, that could interact with the target causing inelastic atomic processes, such as ionization. It is in the region of this expected signal that a huge and, so far, incomprehensible background arises, driven by the so-called single electrons, small charge signals that appear to derive from a multitude of quantum processes in the atomic level of LXe. What can we infer about leptophilic DM without the possibility of background subtraction? Can we classify the processes that create this background? How can machine learning techniques, like Neural Networks, mitigate such backgrounds? These are some of the questions, about the exciting topic of DM direct detection, that we will try to address in this work.

Download or read book The XENON1T Spin Independent WIMP Dark Matter Search Results and a Model to Characterize the Reduction of Electronegative Impurities in Its 3 2 Tonne Liquid Xenon Detector written by Zachary Greene and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: XENON1T is the first tonne-scale TPC, and with 278.8 days of dark matter data has set the strictest limits on WIMP-nucleon interaction cross sections above WIMP masses of 6 GeV/c^2, with a minimum of 4.1 x10^{-47} cm^2 at 30 GeV/c^2. XENON1T and the analysis that led to this result are discussed, with an emphasis on electronic and nuclear recoil calibration fits, which help discriminate between background and WIMP-like events. Interactions in liquid xenon produce light and charge that are measured in TPCs. These signals are attenuated by electronegative impurities including O_2 and H_2O, which are homogeneously distributed throughout the liquid xenon. The decrease in observables enlarges the uncertainty in our analysis, and can decrease our sensitivity. Methods on measuring the charge loss are presented, and a physics model that describes the behavior of the electronegative impurity concentration over the lifetime of XENON1T is derived. The model is shown to successfully explain the more than two years of data.

Download or read book Solar Reflected Dark Matter with XENON1T and XENONnT written by Pueh Leng Tan and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Emission of Single and Few Electrons in XENON1T and Limits on Light Dark Matter written by [Study group] XENON Collaboration and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Delayed single- and few-electron emissions plague dual-phase time projection chambers, limiting their potential to search for light-mass dark matter. This paper examines the origins of these events in the XENON1T experiment. Characterization of the intensity of delayed electron backgrounds shows that the resulting emissions are correlated, in time and position, with high-energy events and can effectively be vetoed. In this work we extend previous S2-only analyses down to a single electron. From this analysis, after removing the correlated backgrounds, we observe rates

Download or read book First Dark Matter Search Results from the XENON1T Experiment written by Elena Aprile and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Path to the Search for Rare Event Signals in XENON1T and XENONnT Dark Matter Experiments written by Tianyu Zhu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The other is the search for the neutrinoless double-beta decay at its ?-value, ?_?? = (2457.83$\pm$0.37)\,keV. The analysis demonstrated that the relative energy resolution at one ?/? is as low as (0.80±$0.02) % in its one-ton fiducial mass, and for single-site interactions at ?_??, a world-leading resolution in ??e experiment that enhance the experimental sensitivity to the neutrinoless double-beta decay events.

Download or read book Search for Dark Matter Interactions Using Ionization Yield in Liquid Xenon written by Sergey Uvarov and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmological observations overwhelmingly support the existence of dark matter which constitutes 87% of the universe's total mass. Weakly Interacting Massive Particles (WIMPs) are a prime candidate for dark matter, and the Large Underground Xenon (LUX) experiment aims to a direct-detection of a WIMP-nucleon interaction. The LUX detector is a dual-phase xenon time-projection chamber housed 4,850 feet underground at Sanford Underground Research Facility in Lead, South Dakota. We present the ionization-only analysis of the LUX 2013 WIMP search data. In the 1.04 x 104 kg-days exposure, thirty events were observed out of the 24.8 expected from radioactive backgrounds. We employ a cut-and-count method to set a 1-sided 90% C.L. upper limit for spin-independent WIMP-nucleon cross-sections. A zero charge yield for nuclear-recoils below 0.7 keV is included upper limit calculation. This ionization-only analysis excludes an unexplored region of WIMP-nucleon cross-section for low-mass WIMPs achieving 1.56 x 10−43 cm2 WIMP-nucleon cross-section exclusion for a 5.1 GeV/c2 WIMP.

Download or read book Search for Inelastic Scattering of WIMP Dark Matter in XENON1T written by Elena Aprile and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Dark Matter Search with XENON1T and Developments for Multi ton Liquid Xenon Detectors written by Julien Wulf and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Early Career written by and published by . This book was released on 2017 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report results from a search for weakly interacting dark matter particles obtained with the LUX experiment. LUX was located at a depth of 4850 feet at the Sanford Underground Research Facility in Lead, South Dakota from 2013 through 2016. It found no evidence for dark matter particle interactions and set new constraints on the properties of such particles for masses between 6 GeV and 100 TeV. The work reported here also characterized the performance of such experiments by developing a new calibration technique based upon a tritium beta decay source.

Download or read book The Astrophysics of Galactic Cosmic Rays written by Roland Diehl and published by Springer Science & Business Media. This book was released on 2002-02-28 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings from two ISSI workshops, 18-22 October 1999 and 15-19 May 2000, Bern, Switzerland

Download or read book Theoretical Nuclear and Subnuclear Physics written by John Dirk Walecka and published by Oxford University Press, USA. This book was released on 1995 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of this text is pedagogical; providing a clear, logical, in-depth, and unifying treatment of many diverse aspects of modern nuclear theory ranging from the non-relativistic many-body problem to the standard model of the strong, electromagnetic, and weak interactions. Four key topics are emphasized in this text: basic nuclear structure, the relativistic nuclear many-body problem, strong-coupling QCD, and electroweak interactions with nuclei. The text is designed to provide graduate students with a basic level of understanding of modern nuclear physics so that they in turn can explore the scientific frontiers.