Book of Abstracts Ii Contents

Total Page:16

File Type:pdf, Size:1020Kb

Book of Abstracts Ii Contents 43rd SLAC Summer Institute Monday, 10 August 2015 - Friday, 21 August 2015 SLAC Book of Abstracts ii Contents Project work time 166 ...................................... 1 Q & A 39 ............................................. 1 Project kick-off 38 ........................................ 1 Q & A 37 ............................................. 1 Projects 36 ............................................ 1 Q & A 35 ............................................. 1 Project work 40 ......................................... 1 Neutrinos at the LHC 24 ..................................... 1 Neutrino Astronomy 26 ..................................... 1 Global Fit to the Neutrino Data 27 ............................... 2 Leptogenesis 20 ......................................... 2 Neutrinoless Double Beta Decay: Experiments 21 ...................... 2 Neutrinos as Dark Matter 22 .................................. 2 Neutrino Floor in Dark Matter Detection 23 .......................... 2 BSM Searches Using Neutrino Detectors 28 .......................... 2 Future Neutrino Facilities 29 .................................. 3 Neutrino Basics (II) 4 ...................................... 3 Neutrino Detectors (II) 8 .................................... 3 Neutrino Sources 3 ........................................ 3 Neutrino Basics (III) 7 ...................................... 3 GeoNeutrinos 108 ........................................ 3 Contest and Project Awards 170 ................................ 3 The View Ahead 30 ....................................... 3 iii Neutrino Basics (I) 2 ....................................... 4 Neutrino Cosmology (I) 6 .................................... 4 Neutrino Cross Sections: Outstanding Issues 11 ........................ 4 Reactor Neutrinos 10 ...................................... 4 Supernova Neutrinos 13 ..................................... 4 Long Baseline Neutrinos (I) 12 ................................. 4 Long Baseline Neutrinos (II) 15 ................................. 5 Direct Mass Measurements 14 ................................. 5 Lepton Flavor Violation 17 ................................... 5 Short Baseline Neutrinos (I) 16 ................................. 5 Short Baseline Neutrinos (II) 19 ................................. 5 Neutrinoless Double Beta Decay: Theory 18 .......................... 5 Why are Neutrinos important ? 1 ............................... 5 Neutrino Detectors (I) 5 ..................................... 6 Neutrino Cosmology (II) 9 .................................... 6 Team 16: Neutrino communication to submarine 179 .................... 6 Team 14: Neutrino cross section experiment 178 ....................... 6 Team 13: Follow up neutrinos double beta decays 177 .................... 6 Team 11: Measure 2K cosmic neutrino background 176 ................... 6 Team 9: NOVA @ SLAC ? 2nd oscillation max ? 175 ..................... 6 Team 8: Exclude SM-like 3-neutrino picture ? 174 ...................... 7 Team 4: Neutrino CPV phase and leptogenesis 173 ...................... 7 Team 3: Neutrino model as DM candidate 172 ........................ 7 Team 2: Detectors for supernovae detection 171 ....................... 7 Team 19: Next generation of solar neutrino experiment ? 180 ................ 7 Results from AMS 131 ...................................... 7 Results from BaBar 130 ..................................... 7 Results from Planck/ACT 122 .................................. 8 Results from DES 123 ...................................... 8 Results from BICEP/Keck 124 .................................. 8 iv Results from BOSS/DESI 125 .................................. 8 Higgs and SM Results from ATLAS/CMS 126 ......................... 8 New Physics Searches at CMS/ATLAS 127 ........................... 8 Results from LHCb 128 ..................................... 8 Results from ALICE 129 ..................................... 9 Heavy Photon Search Experiment at JLab 133 ......................... 9 Results from Fermi 132 ..................................... 9 Results from CAST 134 ..................................... 9 Results from Borexino 137 ................................... 9 Results from NOVA 136 ..................................... 9 Results from T2K/Super-K 139 ................................. 9 Results from CUORE 138 .................................... 10 Results from PICO 135 ...................................... 10 GeoNeutrinos 25 ......................................... 10 Particle Fever: The Movie 0 ................................... 10 Team 16: How to tell if axion is 20% of DM signal ? 59 .................... 10 Team 13: Maximum mass of DM particle 58 .......................... 10 Team 8: How to detect invisible Higgs decays 55 ....................... 10 Team 5: DM signal vs astrophysical sources 54 ........................ 10 Team 11: Direct detection down to 100 MeV 57 ........................ 11 Team 10: LHC missing Et excess => DM signal ? 56 ..................... 11 Team 1a: Direct detection below neutrino floor 51 ...................... 11 Polarization in the CMB 50 ................................... 11 Team 3: Devise prediction using Dark Sky simulation 53 ................... 11 Team 1b: Direct detection below neutrino floor 52 ...................... 11 Results from the Tevatron 82 .................................. 11 Recent Results from CMS 83 .................................. 12 Recent Results from ATLAS 81 ................................. 12 Directional Detection of Dark Matter with DRIFT 33 ..................... 12 Searching for Physics Beyond the Standard Model at the LHC 32 . 12 v Physics of the Higgs Boson at the LHC 31 ........................... 12 Results from Cosmic Ray Experiments 34 ........................... 12 Team 17: Observations to distinguish CDM from other models 60 . 12 Team 19: How to distinguish decaying and stable DM ? 61 . 13 Team 20: Constrain density slope in the Milkyway 62 .................... 13 Q & A 66 ............................................. 13 Results from DES 48 ....................................... 13 Results from BOSS 49 ...................................... 13 Results from IceCube 46 ..................................... 13 Searches for Dark Matter and Other Results from the B-Factories 44 . 13 Results from the Fermi Gamma-Ray Space Telescope 45 ................... 14 Results from T2K 42 ....................................... 14 Results from LHCb 43 ...................................... 14 Soccer 72 ............................................. 14 Q & A 71 ............................................. 14 Results from EXO 41 ....................................... 14 Anomalies in the Indirect Detection of Dark Matter 47 .................... 14 A Truth Study Using Transverse Variables to Characterise Nuclear Effects in neutrino– nucleus scattering. 161 ................................... 15 Background Reduction Strategies for the MAJORANA DEMONSTRATOR 153 . 15 Neutron Majorana mass from exotic instantons 86 ...................... 15 Phenomenology in Non-minimal Universal Extra Dimensions 76 . 16 Search for new phenomena in dijet distributions using pp collision data at centre-of-mass energy 8 TeV with the ATLAS detector 80 ......................... 16 Redshift space distortions and interacting dark sector models 77 . 17 An introduction to a CC1π0 exclusive analysis using the ND280 Tracker + ECal 142 . 17 Development of a Timing Detector for the Mu3e Experiment 167 . 18 Pulse shape analysis of CUORE-0 bolometers 152 ....................... 18 Systematic Sources of Uncertainty in NaI(Tl) Dark Matter Detectors 101 . 18 TPC monitoring for LUX-ZEPLIN experiment 67 ....................... 19 vi HOLMES, an experiment for a direct neutrino mass measurement 114 . 19 The DarkSide-50 Dark Matter Detector 102 .......................... 20 LSST Camera Sensor Characterization 79 ........................... 20 TITUS- An intermediate near detector for Tokai to HyperKamiokande neutrino oscillations 164 .............................................. 20 Spin-One Top Partner: Phenomenology 78 .......................... 21 The AmC calibration source induced background at Daya Bay Experiment 159 . 21 Sensitivity analysis of JUNO to large extra dimensions 145 . 22 Dark Matter Annihilations in the Causal Diamond 104 .................... 22 Higgs Gravitational Interaction, Weak Boson Scattering, and Higgs Inflation in Jordan and Einstein Frames 97 ...................................... 22 Dedicated Trigger for Highly Ionising Particles at ATLAS 149 . 23 The Direct Detection of Boosted Dark Matter at High Energies and PeV events atIceCube 110 .............................................. 23 Adulterated Dirac neutrinos in a type-I seesaw 115 ...................... 24 The SuperCDMS Active Neutron Shielding Concept 65 .................... 24 Electroweak precision of Higgs sneutrino models 116 .................... 24 In-situ measurement of the light attenuation in liquid argon in GERDA 120 . 25 Role of electroweak radiation in predictions for dark matter indirect detection 90 . 25 Cosmogenic Background Discrimination at SNO+ 168 .................... 26 Dual-phase Liquid Xenon Detector Development at UCLA 98 . 26 A Model of Partially Interacting Dark Matter 70 ....................... 27 Signatures of Dark Matter Scattering Inelastically Off Nuclei 87 . 27 Dark matter and computational geometry 73 ......................... 27 Numerical evolution of two autogravitating scalar fields with spontaneous symmetry break- ing 85 ............................................
Recommended publications
  • Annual Report 2009 P O R T
    A LNGS/EXP-01/10 N May 2010 N U A L R E Annual Report 2009 P O R T 2 0 0 9 Lab ora tor i N o az s io as nal S i del Gran LNGS - s.s. 17 bis km 18,910 67010 ASSERGI (AQ) ITALY tel.+39 0862 4371 fax +39 0862 437559 email: [email protected] http://www.lngs.infn.it Codice ISBN ISBN-978-88-907304-5-0 Annual Report 2009 LNGS Director Dr. Lucia Votano Editor Dr. Roberta Antolini Technical Assistants Dr. Adriano Di Giovanni Marco Galeota The Gran Sasso National Laboratory My mandate as Director at LNGS took effect from September 2009 and it would be unthinkable to start this introduction to the 2009 LNGS annual report without mentioning the earthquake of last April which left 370 people dead, 15,000 injured and devastated the surrounding area together with the social and economic life of L’Aquila. Most of the lab personnel as well as the 70,000 inhabitants in L’Aquila were rendered homeless. Fortunately the Laboratory survived the devastating earthquake and escaped damage. This was possible thanks to two factors: the acceleration experienced deep underground, (0.03g), as expected, was lower than that of the external laboratory (0.15 g) and much lower than in L’Aquila (0.64 g).; the anti-seismic design of the apparatus protected the underground installations. In April Eugenio Coccia was still on duty as Director of the Lab, and I think it is proper to mention how effective his dedication and actions were, in providing support to the laboratory personnel and assuring the immediate restarting of the activities in the Laboratory.
    [Show full text]
  • Arxiv:1904.01056V1 [Physics.Ins-Det] 1 Apr 2019 ‡ † ∗ Acltos Cosawd Nryrneadi Various [5–7]
    APS/IOA-165 3 Simulated neutrino signals of low and intermediate energy neutrinos on Cd detectors J. Sinatkas∗ Department of Informatics Engineering, Technological Institute of Western Macedonia, Kastoria, GR-52100 V. Tsakstara† Electrical Engineering Department, Technological Institute of Western Macedonia, School of Applied Science,Kozani, GR-50100 and Division of Theoretical Physics, University of Ioannina, GR-45110 Ioannina, Greece Odysseas Kosmas‡ Modelling and Simulation Centre, MACE, University of Manchester, Sackville Street, Manchester, UK (Dated: April 3, 2019) Neutrino-nucleus reactions cross sections, obtained for neutrino energies in the range εν ≤ 100 − 120 MeV (low- and intermediate-energy range), which refer to promising neutrino detec- tion targets of current terrestrial neutrino experiments, are presented and discussed. At first, we evaluated original cross sections for elastic scattering of neutrinos produced from various astrophys- ical and laboratory neutrino sources with the most abundant Cd isotopes 112Cd, 114Cd and 116Cd. These isotopes constitute the main material of the COBRA detector aiming to search for neutrino- less double beta decay events and neutrino-nucleus scattering events at the Gran Sasso laboratory (LNGS). The coherent ν-nucleus reaction channel addressed with emphasis here, dominates the neutral current ν-nucleus scattering, events of which have only recently been observed for a first time in the COHERENT experiment at Oak Ridge. Subsequently, simulated ν-signals expected to be recorded at Cd detectors are derived through the application of modern simulation techniques and employment of reliable neutrino distributions of astrophysical ν-sources (as the solar, super- nova and Earth neutrinos), as well as laboratory neutrinos (like the reactor neutrinos, the neutrinos produced from pion-muon decay at rest and the β-beam neutrinos produced from the acceleration of radioactive isotopes at storage rings as e.g.
    [Show full text]
  • The COBRA Experiment
    10th Int. Conf. on Topics in Astroparticle and Underground Physics (TAUP2007) IOP Publishing Journal of Physics: Conference Series 120 (2008) 052048 doi:10.1088/1742-6596/120/5/052048 The COBRA Experiment 1J.R. Wilson2 Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH, UK E-mail: [email protected] Abstract. The COBRA experiment aims to use a large array of CdZnTe semiconductor detectors to search for neutrinoless double beta decay. The COBRA collaboration are currently operating a small proto-type array of crystals in a low-background environment. This paper presents the current status of the experiment, results from current and previous proto-types and future prospects for COBRA. 1. Concept COBRA aims to search for neutrinoless double beta decay (0νββ) in CdZnTe semiconductor crystals[1]. There are actually 9 candidate 0νββ isotopes, 5 in the form of β −β− emitters, intrinsic to the detector material, but measurements will focus on 116Cd. This has the highest Q-value at 2.8 MeV, beyond all the single gamma-lines from the natural decay chains which would be problematic in contaminating signal regions at lower energies. CdZnTe, in common with other semiconductors, can be produced cleanly with low levels of intrinsic radioactive background and offers good energy resolution. Unlike many semiconductors though, CdZnTe can be operated at room temperature without the need for expensive cryogenics close to the detectors. For a neutrino mass of about 50 meV, as suggested by neutrino oscillation data, the half-life of 116Cd is of order 1026 years (exact values depend on the nuclear matrix elements).
    [Show full text]
  • Status and Perspectives of 2, + and 2+ Decays
    Review Status and Perspectives of 2e, eb+ and 2b+ Decays Pierluigi Belli 1,2,*,† , Rita Bernabei 1,2,*,† and Vincenzo Caracciolo 1,2,3,*,† 1 Istituto Nazionale di Fisica Nucleare (INFN), sezione di Roma “Tor Vergata”, I-00133 Rome, Italy 2 Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133 Rome, Italy 3 INFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi, Italy * Correspondence: [email protected] (P.B.); [email protected] (R.B.); [email protected] (V.C.) † These authors contributed equally to this work. Abstract: This paper reviews the main experimental techniques and the most significant results in the searches for the 2e, eb+ and 2b+ decay modes. Efforts related to the study of these decay modes are important, since they can potentially offer complementary information with respect to the cases of 2b− decays, which allow a better constraint of models for the nuclear structure calculations. Some positive results that have been claimed will be mentioned, and some new perspectives will be addressed shortly. Keywords: positive double beta decay; double electron capture; resonant effect; rare events; neutrino 1. Introduction The double beta decay (DBD) is a powerful tool for studying the nuclear instability, the electroweak interaction, the nature of the neutrinos, and physics beyond the Standard Model (SM) of Particle Physics. The theoretical interpretations of the double beta decay Citation: Belli, P.; Bernabei, R.; with the emission of two neutrinos is well described in the SM; the process is characterized Caracciolo, V. Status and Perspectives by a nuclear transition changing the atomic number Z of two units while leaving the atomic of 2e, eb+ and 2b+ Decays.
    [Show full text]
  • Single-Electron Events and 0 {\Nu}{\Beta}{\Beta} Events in Cdznte
    3-D topological signatures and a new discrimination method for single-electron events and 0νββ events in CdZnTe: A Monte Carlo simulation studyI Ming Zenga,b, Teng-Lin Lia,b, Ji-Rong Canga,b, Zhi Zenga,b,∗, Jian-Qiang Fua,b, Wei-He Zenga,b, Jian-Ping Chenga,b, Hao Maa,b, Yi-Nong Liua,b aKey Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, China bDepartment of Engineering Physics, Tsinghua University, Beijing 100084, China Abstract In neutrinoless double beta (0νββ) decay experiments, the diversity of topological signatures of different particles provides an important tool to distinguish double beta events from background events and reduce background rates. Aiming at suppressing the single-electron backgrounds which are most challenging, several groups have established Monte Carlo simulation packages to study the topological characteristics of single-electron events and 0νββ events and develop methods to differentiate them. In this paper, applying the knowledge of graph theory, a new topological signature called REF track (Refined Energy-Filtered track) is proposed and proven to be an accurate approximation of the real particle trajectory. Based on the analysis of the energy depositions along the REF track of single-electron events and 0νββ events, the REF energy deposition models for both events are proposed to indicate the significant differences between them. With these differences, this paper presents a new discrimination method, which, in the Monte Carlo simulation, achieved a single-electron rejection factor of 93.8 ± 0.3 (stat.)% as well as a 0νββ efficiency of 85.6 ± 0.4 (stat.)% with optimized parameters in CdZnTe.
    [Show full text]
  • Status and Perspectives on Rare Decay Searches in Tellurium Isotopes
    universe Review Status and Perspectives on Rare Decay Searches in Tellurium Isotopes Alice Campani 1,2,† , Valentina Dompè 3,4,† and Guido Fantini 3,4,*,† 1 Dipartimento di Fisica, Università di Genova, I-16146 Genova, Italy; [email protected] 2 INFN—Sezione di Genova, I-16146 Genova, Italy 3 Dipartimento di Fisica, Sapienza Università di Roma, I-00185 Roma, Italy; [email protected] 4 INFN—Sezione di Roma, I-00185 Roma, Italy * Correspondence: [email protected] † These authors contributed equally to this work. Abstract: Neutrinoless double beta decay (0nbb) is a posited lepton number violating decay whose search is an increasingly active field in modern astroparticle physics. A discovery would imply neutrinos are Majorana particles and inform neutrino physics, cosmology and beyond-standard- model theories. Among the few nuclei where double beta decay (bb) is allowed, tellurium isotopes stand for their high natural abundance and are currently employed in multiple experiments. The search for 0nbb will provide large exposure data sets in the coming years, paving the way for unprecedented sensitivities. We review the latest rare decay searches in tellurium isotopes and compare past results with theories and prospects from running experiments. Keywords: double beta decay; tellurium; 120Te; 123Te; 128Te; 130Te Citation: Campani, A.; Dompè, V.; Fantini, G. Status and Perspectives on 1. Introduction Rare Decay Searches in Tellurium Double beta decay is a rare second order standard model (SM) weak interaction Isotopes. Universe 2021, 7, 212. process where a nucleus transforms into a member of the same isobaric multiplet. The https://doi.org/10.3390/ investigation of rare decays is an active topic of research.
    [Show full text]
  • Nai(Tl) Scintillator 60Со • Energy Resolution • Time Resolution • Coordinate Resolution • Dead Time Hpge
    Low Counting Experimental Techniques 3th lecture: Detectors for low counting experiments 1: scintillation, Cherenkov, semiconductors Fedor Danevich Institute for Nuclear Research, Kyiv, Ukraine http://lpd.kinr.kiev.ua [email protected] [email protected] 1 F.A. Danevich Univ. Tor Vergata November 24, 2015 • Brief summary of the 2nd lecture The main sources of background, natural radioactivity The main sources of background are: • Environmental radioactivity (mainly the natural radioactivity) • Cosmic rays • Neutron induced background • Cosmogenic activation • Artificial radioactivity • Noise, events pile-up The most valuable gamma quanta come from 40K and daughters of 232Th, 238U The secular equilibrium is typically broken in materials which have been subjected to physical and chemical treatment due to different physical and chemical properties of daughter elements 2 F.A. Danevich Univ. Tor Vergata November 24, 2015 • Brief summary of the 2nd lecture Main components of cosmic rays The Electromagnetic To suppress the Muons penetrate for component can be suppressed Hadronic kilometers underground by tens cm of metal (lead, component one copper, steel) need to go 5-10 m underground CdWO4 crystal scintillator 77 cm no shield GIOVE = Germanium Spectrometer with Inner and induced 5 cm lead + 10 cm copper Outer Veto (Max-Planck-Institut, muons Heidelberg) 0.5 3 F.A. Danevich Univ. Tor Vergata November 24, 2015 • Brief summary of the 2nd lecture Cosmogenic activation environmental, material of detector, in-situ Permanent production of cosmogenic radionuclides under cosmic rays irradiation (e.g. 3H, 7Be, 10Be, 14C, 36Cl) Cosmogenic activation of detector materials Cosmogenic activation of materials can be calculated with reasonable accuracy: COSMO, ACTIVIA packages Cosmogenic activation in-situ (short living radioactivity, which nevertheless cannot be vetoed by anti-coincidence counters due to increase of data acquisition dead time) 4 F.A.
    [Show full text]
  • Annual Report 2013 R T Laboratori Nazionali Del Gran Sasso 2 0 1 3 Cover Image: GERDA Experiment ISBN-978-88-940122-0-0 © Markus Knapp - Univ
    LNGS - s.s. 17 bis km 18,910 67010 ASSERGI (AQ) ITALY A LNGS/EXP-01/14 tel.+39 0862 4371 fax +39 0862 437559 September 2014 email: [email protected] N http://www.lngs.infn.it N U A L R E P O Annual Report 2013 R T Laboratori Nazionali del Gran Sasso 2 0 1 3 Cover image: GERDA Experiment ISBN-978-88-940122-0-0 © Markus Knapp - Univ. of Tübingen Codice ISBN 978-88-940122-0-0 Annual Report 2013 LNGS Director Prof. Stefano Ragazzi Editor Dr. Roberta Antolini Technical Assistants Dr. Alessia Giampaoli Mr. Marco Galeota LNGS/EXP-01/14 September 2014 INFN ali azion Laboratori N sso an Sa l Gr de 13 20 ort Annual Rep Contents BOREXINO pag. 1 COBRA pag. 12 CRESST pag. 25 CUORE pag. 34 DAMA pag. 49 DARKSIDE pag. 71 GERDA pag. 80 GINGER pag. 97 ICARUS pag. 111 LUNA pag. 121 LVD pag. 134 OPERA pag. 151 THEORY pag. 159 XENON pag. 169 COSMIC SILENCE pag. 181 ERMES pag. 188 VIP pag. 192 AUGER pag. 199 PALXA pag. 212 THE BOREXINO EXPERIMENT The Borexino collaboration Spoke-persons: C. Galbiati, M. Pallavicini, G. Ranucci G. Bellinih, J. Benzigerk, D. Bicks, G. Bonfinie, D. Bravoq, B. Caccianigah, F. Calapricel, A. Caminatac, P. Cavalcantee, A. Chavarrial, A. Chepurnovr, D. D'Angeloh, S. Davinit, A. Derbinm, A. Emplt, A. Etenkog, K. Fomenkob,e, D. Francoa, C. Galbiatil, S. Gazzanae, C. Ghianoc, M. Giammarchih, M. G¨oger-Neffn, A. Gorettil, C. Hagners, E. Hungerfordt, Aldo Iannie, Andrea Iannil, V. Kobychevf, D.
    [Show full text]
  • Poster Title List
    List of Abstracts | Poster Session II | Friday June 6th | 5.45pm-7.30pm Track Abstract ID Board # Title Presenter Long Baseline Oscillations 16 1 Track reconstruction for CHIPS Mr. PFUTZNER, Maciej 23 2 CHerenkov detectors In mine PitS (CHIPS) Prof. MARSHAK, Marvin 26 3 A 20 ton double phase LAr TPC for LBNO Dr. MURPHY, Sebastien 47 4 Physics potential of the LAGUNA/LBNO project Mr. AGOSTINO, LUCA 155 5 135 kton Liquid Scintillator Detector TRZASKA, Wladyslaw Henryk 54 6 Low Energy Neutrino Studies and Backgrounds at Hyper-Kamiokande Dr. YANO, Takatomi 202 7 Hyper-Kamiokande detector Dr. TANAKA, Hide-Kazu 330 8 Development of new 50-cm diameter photodetectors for Hyper-Kamiokande Mr. OKAJIMA, Yuji 66 9 Commissioning and Monitoring of the NOvA Far Detector Dr. MUETHER, Mathew 81 10 The NOvA electron neutrino appearance analysis Dr. BACKHOUSE, Christopher 102 11 The NOvA data driven trigger Dr. TAMSETT, Matthew 109 12 Time Synchronization and Energy Calibration in the NOvA Detector Mr. NINER, Evan 207 13 Near to Far extrapolation for the NOvA muon neutrino disappearance analysis. Dr. SUTER, Louise 217 14 Muon Neutrino Disappearance Measurements at NOvA Mr. BAYS, Kirk 321 15 Event Reconstruction with the NOvA Experiment Mr. BAIRD, Michael 351 16 Cosmic Ray Muon Data in the NOvA Far Detector Dr. DAVIES, Gavin 98 17 The need for an early anti-neutrino run of NOvA Dr. PRAKASH, Suprabh 68 18 Muon Neutrino Disappearance Measurement at T2K WONGJIRAD, Taritree 160 19 Joint Appearance and Disappearance Analysis for the T2K Long-Baseline Neutrino Experiment Dr. FRIEND, Megan 101 20 TITUS: An Intermediate Distance Detector for the Tokai-to-Hyper-Kamiokande Neutrino Beam Dr.
    [Show full text]
  • Neutrino Physics
    Neutrino Physics I. Gil-Botella Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Madrid, Spain Abstract The fundamental properties of neutrinos are reviewed in these lectures. The first part is focused on the basic characteristics of neutrinos in the Standard Model and how neutrinos are detected. Neutrino masses and oscillations are introduced and a summary of the most important experimental results on neu- trino oscillations to date is provided. Then, present and future experimental proposals are discussed, including new precision reactor and accelerator ex- periments. Finally, different approaches for measuring the neutrino mass and the nature (Majorana or Dirac) of neutrinos are reviewed. The detection of neutrinos from supernovae explosions and the information that this measure- ment can provide are also summarized at the end. 1 Introduction The last 20 years have been a revolution for neutrino physics. The observation of neutrino oscillations has established that neutrinos have masses and this implies physics beyond the Standard Model. This fact has a clear impact not only on particle physics, but also on astroparticle physics and cosmology. Nevertheless, neutrinos are still quite unknown particles. At the moment we know that there are three light neutrinos, although some theoretical models propose the existence of sterile neutrinos (not interacting weakly with matter). Neutrinos are much lighter than their charged leptonic partners and they interact very weakly with matter. In addition, during the last 13 years, neutrino experiments have proved that neutrinos have mass, contrary to the zero-neutrino-mass hypothesis of the Standard Model. Neutrinos oscillate when they propagate through space. During the past few years the solar neutrino problem has been solved and the solar and atmospheric oscillation parameters have been confirmed using artificial sources.
    [Show full text]
  • Construction of a Low Background Facility for the COBRA Experiment and Its Performance
    Construction of a Low Background Facility for the COBRA Experiment and its Performance Dissertation zur Erlangung des akademischen Grades eines Doktors der Naturwissenschaften des Fachbereichs Physik der Universität Dortmund vorgelegt von DIPL.PHYS.DANIEL MÜNSTERMANN Lehrstuhl für Experimentelle Physik IV Fachbereich Physik Universität Dortmund Dortmund, den 12. September 2007 2 In memory of my father, who passed his passion for science on to me. Construction of a Low Background Facility for the COBRA Experiment and its Performance Dissertation zur Erlangung des akademischen Grades eines Doktors der Naturwissenschaften des Fachbereichs Physik der Universität Dortmund vorgelegt von DIPL.PHYS.DANIEL MÜNSTERMANN Dekan: Prof. Dr. M. Tolan Referent: Priv. Doz. Dr. K. Zuber Korreferent: Prof. Dr. C. Gößling Beisitzer: Dr. J. Becker Tag der mündlichen Prüfung: 12. Oktober 2007 Teilergebnisse dieser Arbeit waren Gegenstand verschiedener Veröffentlichungen und Ta- gungsbeiträge. Eine Liste befindet sich am Ende der Arbeit ab Seite 153. Abstract The COBRA experiment is investigating neutrinoless double-beta decays of Cd, Zn and Te isotopes with an array of CdZnTe semiconductor detectors. The current development stage consists of 64 CPG-type detectors of 1 cm3 size each that will be arranged in form of a 3- dimensional 4×4×4-array. At the time of writing, the first 16-detector layer was installed and has been collecting data since January 2007. The remaining three layers are currently being assembled. Within the course of this work, key experimental components for the COBRA setup have been developed, among them several versions of custom-built preamplifiers, shapers and large parts of COBRA’s VME-based ADC.
    [Show full text]
  • Investigation of the 2Ν2β-Spectrum of Cd with the COBRA Experiment
    Investigation of the 2ν2β-spectrum of 116Cd with the COBRA experiment Master-Arbeit zur Erlangung des Hochschulgrades Master of Science im Master-Studiengang Physik vorgelegt von Julia K¨uttler geboren am 31.05.1995 in Rodewisch Institut f¨urKern- und Teilchenphysik Fakult¨atPhysik Technische Universit¨atDresden 2019 Eingereicht am 13. M¨arz2019 1. Gutachter: Prof. Dr. Kai Zuber 2. Gutachter: Prof. Dr. Arno Straessner Betreuer: Stefan Zatschler 3 Abstract The COBRA experiment, which is located at the LNGS underground facility in Italy, searches for extremely rare decay modes of several nuclides that are intrinsically abundant in the semi- conductor detectors made of CdZnTe. In this thesis, the 2ν2β-decay of 116Cd, which has a half-life of 2.62·1019 yr [1], will be investigated. To measure such a rare decay, large efforts regarding the background reduction and offline data analysis have to be spent. To improve the discrimination between signal-like and background-like events, a new pulse shape analysis method is implemented and optimized for the data analysis routine. A better signal acceptance compared to the previous used data cuts can be achieved. To further reduce the background level, a data partitioning was accomplished. Run periods and detectors with a higher rate could be identified and excluded from the final data set. This decreases the count rate in the ROI by a factor of 2.8. The exclusion of a certain depth region of the detectors leads to a further rate reduction by a factor of three. The identified background enriched run periods, detectors and detector regions can prospectively be used as a starting point towards a background model for the COBRA demonstrator.
    [Show full text]