Letter of Interest Ultralight Bosonic Dark Matter Theory
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UC Berkeley UC Berkeley Electronic Theses and Dissertations
UC Berkeley UC Berkeley Electronic Theses and Dissertations Title Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It Permalink https://escholarship.org/uc/item/2sv8b4x5 Author Mcgehee Jr., Robert Stephen Publication Date 2020 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It by Robert Stephen Mcgehee Jr. A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Physics in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Hitoshi Murayama, Chair Professor Alexander Givental Professor Yasunori Nomura Summer 2020 Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It Copyright 2020 by Robert Stephen Mcgehee Jr. 1 Abstract Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It by Robert Stephen Mcgehee Jr. Doctor of Philosophy in Physics University of California, Berkeley Professor Hitoshi Murayama, Chair An abundance of evidence from diverse cosmological times and scales demonstrates that 85% of the matter in the Universe is comprised of nonluminous, non-baryonic dark matter. Discovering its fundamental nature has become one of the greatest outstanding problems in modern science. Other persistent problems in physics have lingered for decades, among them the electroweak hierarchy and origin of the baryon asymmetry. Little is known about the solutions to these problems except that they must lie beyond the Standard Model. The first half of this dissertation explores dark matter models motivated by their solution to not only the dark matter conundrum but other issues such as electroweak naturalness and baryon asymmetry. -
Letter of Interest Cosmic Probes of Ultra-Light Axion Dark Matter
Snowmass2021 - Letter of Interest Cosmic probes of ultra-light axion dark matter Thematic Areas: (check all that apply /) (CF1) Dark Matter: Particle Like (CF2) Dark Matter: Wavelike (CF3) Dark Matter: Cosmic Probes (CF4) Dark Energy and Cosmic Acceleration: The Modern Universe (CF5) Dark Energy and Cosmic Acceleration: Cosmic Dawn and Before (CF6) Dark Energy and Cosmic Acceleration: Complementarity of Probes and New Facilities (CF7) Cosmic Probes of Fundamental Physics (TF09) Astro-particle physics and cosmology Contact Information: Name (Institution) [email]: Keir K. Rogers (Oskar Klein Centre for Cosmoparticle Physics, Stockholm University; Dunlap Institute, University of Toronto) [ [email protected]] Authors: Simeon Bird (UC Riverside), Simon Birrer (Stanford University), Djuna Croon (TRIUMF), Alex Drlica-Wagner (Fermilab, University of Chicago), Jeff A. Dror (UC Berkeley, Lawrence Berkeley National Laboratory), Daniel Grin (Haverford College), David J. E. Marsh (Georg-August University Goettingen), Philip Mocz (Princeton), Ethan Nadler (Stanford), Chanda Prescod-Weinstein (University of New Hamp- shire), Keir K. Rogers (Oskar Klein Centre for Cosmoparticle Physics, Stockholm University; Dunlap Insti- tute, University of Toronto), Katelin Schutz (MIT), Neelima Sehgal (Stony Brook University), Yu-Dai Tsai (Fermilab), Tien-Tien Yu (University of Oregon), Yimin Zhong (University of Chicago). Abstract: Ultra-light axions are a compelling dark matter candidate, motivated by the string axiverse, the strong CP problem in QCD, and possible tensions in the CDM model. They are hard to probe experimentally, and so cosmological/astrophysical observations are very sensitive to the distinctive gravitational phenomena of ULA dark matter. There is the prospect of probing fifteen orders of magnitude in mass, often down to sub-percent contributions to the DM in the next ten to twenty years. -
Table of Contents (Print)
NEWSPAPER The PandaX-II liquid xenon detector used for dark matter searches at the China Jin-Ping Underground Laboratory. Selected for an Editors’ Suggestion. [Andi Tan et al. (PandaX-II Collaboration), Phys. Rev. Lett. 117, 121303 (2016)] PHYSICAL REVIEW LETTERS Contents Articles published 10 September–16 September 2016 VOLUME 117, NUMBER 12 16 September 2016 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. Direct Measurement of the Density Matrix of a Quantum System .................................................................... 120401 G. S. Thekkadath, L. Giner, Y. Chalich, M. J. Horton, J. Banker, and J. S. Lundeen Accessing Many-Body Localized States through the Generalized Gibbs Ensemble ........................................................... 120402 Stephen Inglis and Lode Pollet Noise Threshold and Resource Cost of Fault-Tolerant Quantum Computing with Majorana Fermions in Hybrid Systems ................................................................................................................................................................. 120403 Ying Li Quasiprobability Representations of Quantum Mechanics with Minimal Negativity .......................................................... 120404 Huangjun Zhu Grover Search and the No-Signaling Principle ..................................................................................................................... 120501 Ning Bao, Adam Bouland, and Stephen P. Jordan Gravitation and Astrophysics Observation of Noise Correlated by -
Constraining a Thin Dark Matter Disk with Gaia
LCTP 17-03, MIT-CTP 4957 Constraining a Thin Dark Matter Disk with Gaia Katelin Schutz,1, ∗ Tongyan Lin,1, 2, 3 Benjamin R. Safdi,4 and Chih-Liang Wu5 1Berkeley Center for Theoretical Physics, University of California, Berkeley, CA 94720, USA 2Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 3Department of Physics, University of California, San Diego, CA 92093, USA 4Leinweber Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, MI 48109 5Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 If a component of the dark matter has dissipative interactions, it could collapse to form a thin dark disk in our Galaxy that is coplanar with the baryonic disk. It has been suggested that dark disks could explain a variety of observed phenomena, including periodic comet impacts. Using the first data release from the Gaia space observatory, we search for a dark disk via its effect on stellar kinematics in the Milky Way. Our new limits disfavor the presence of a thin dark matter disk, and we present updated measurements on the total matter density in the Solar neighborhood. Introduction.| The particle nature of dark matter height of hDD 10 pc are required to meaningfully im- (DM) remains a mystery in spite of its large abundance pact the above∼ phenomena.1 in our Universe. Moreover, some of the simplest DM Here we present a comprehensive search for a local DD, models are becoming increasingly untenable. Taken to- using tracer stars as a probe of the local gravitational po- gether, the wide variety of null searches for particle DM tential. -
Ultra Light Axionic Dark Matter: Galactic Halos and Implications for Observations with Pulsar Timing Arrays
galaxies Article Ultra Light Axionic Dark Matter: Galactic Halos and Implications for Observations with Pulsar Timing Arrays Ivan de Martino 1,* ID , Tom Broadhurst 1,2, S.-H. Henry Tye 3, Tzihong Chiueh 4, Hsi-Yu Schive 5 and Ruth Lazkoz 1 1 Department of Theoretical Physics, University of the Basque Country UPV/EHU, E-48080 Bilbao, Spain; [email protected] (T.B.); [email protected] (R.L.) 2 Ikerbasque, Basque Foundation for Science, E-48011 Bilbao, Spain 3 Institute for Advanced Study and Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China; [email protected] 4 National Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan; [email protected] 5 National Center for Supercomputing Applications, Urbana, IL 61801, USA; [email protected] * Correspondence: [email protected] Received: 29 November 2017; Accepted: 8 January 2018; Published: 16 January 2018 Abstract: The cold dark matter (CDM) paradigm successfully explains the cosmic structure over an enormous span of redshifts. However, it fails when probing the innermost regions of dark matter halos and the properties of the Milky Way’s dwarf galaxy satellites. Moreover, the lack of experimental detection of Weakly Interacting Massive Particle (WIMP) favors alternative candidates such as light axionic dark matter that naturally arise in string theory. Cosmological N-body simulations have shown that axionic dark matter forms a solitonic core of size of '150 pc in the innermost region of the galactic halos. The oscillating scalar field associated to the axionic dark matter halo produces an oscillating gravitational potential that induces a time dilation of the pulse arrival time of −22 '400 ns/(mB/10 eV) for pulsar within such a solitonic core. -
Cora Dvorkin Curriculum Vitae
Cora Dvorkin 1 Cora Dvorkin Curriculum Vitae Contact Address: Department of Physics, Harvard University 17 Oxford Street, Lyman 334 Cambridge, MA 02138 Telephone (773) 915-3857 Email: [email protected] Website: http : ==dvorkin:physics:harvard:edu=Home:html https : ==www:physics:harvard:edu=people=facpages=dvorkin Citizenship: Argentina EDUCATION July, 2011: Doctor of Philosophy in Physics University of Chicago Dissertation: \On the Imprints of Inflation in the Cosmic Microwave Background" Advisor: Prof. Wayne Hu September, 2006: Master of Science in Physics University of Chicago June, 2005: Diploma in Physics (M.S. equivalent) University of Buenos Aires (Summa cum laude) RESEARCH INTERESTS I am a theoretical cosmologist. My areas of interest are: the nature of dark matter, neutrinos and other light relics, and the physics of the early universe. I use observables such as the Cosmic Microwave Background (CMB), the large-scale structure of the universe, 21-cm radiation, and strong gravitational lensing to shed light on these questions. POSITIONS HELD July, 2019 - present Department of Physics, Harvard University Associate Professor July, 2015 - June, 2019 Department of Physics, Harvard University Assistant Professor 2014-2015 ITC - Center for Astrophysics, Harvard University Hubble Fellow and ITC Fellow 2011-2014 Institute for Advanced Study (Princeton), School of Natural Sciences Postdoctoral Member 2006-2011 University of Chicago, Department of Physics Research Assistant at Kavli Institute for Cosmological Physics (KICP) 2004-2005 -
Tevpa 2017.Pdf
東京大学 2004.2.12 シンボルマーク+ロゴタイプ 新東大ブルー 基本形 漢字のみ 英語のみ TeV frontier in particle astrophysics Hitoshi Murayama (Berkeley, Kavli IPMU) TeVPA 2017, Columbus, Aug 11, 2017 東京大学 2004.2.12 シンボルマーク+ロゴタイプ 新東大ブルー 基本形 漢字のみ 英語のみ sub-GeV frontier in particle astrophysics Hitoshi Murayama (Berkeley, Kavli IPMU) TeVPA 2017, Columbus, Aug 11, 2017 +Yonit Hochberg, Eric Kuflik matter Ωm changes the overall heights of the peaks matter Ωm changes the overall heights of the peaks nDM 10 GeV =4.4 10− WIMP Miracles ⇥ mDM DM SM DM SM “weak” coupling correct abundance “weak” mass scale Miracle2 nDM 10 GeV =4.4 10− WIMP Miracles ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ “weak” coupling correct abundance “weak” mass scale Miracle2 sociology • Particle physicists used to think sociology • Particle physicists used to think • need to solve problems with the SM sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark matter candidate as an option sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark matter candidate as an option • big ideas: supersymmetry, extra dim sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark -
Arxiv:1906.00969V2 [Hep-Ph] 2 Sep 2019
FTUAM-19-11; IFT-UAM/CSIC-19-74 Very Light Asymmetric Dark Matter Gonzalo Alonso-Alvarez´ 1, Julia Gehrlein2;3, Joerg Jaeckel1 and Sebastian Schenk1 1Institut f¨urTheoretische Physik, Universit¨atHeidelberg, Philosophenweg 16, 69120 Heidelberg, Germany 2Instituto de F´ısica Te´orica UAM/CSIC, Calle Nicol´as Cabrera 13-15, Cantoblanco E-28049 Madrid, Spain 3Departamento de F´ısica Te´orica, Universidad Aut´onomade Madrid, Cantoblanco E-28049 Madrid, Spain Abstract Very light dark matter is usually taken to consist of uncharged bosons such as axion-like particles or dark photons. Here, we consider the prospect of very light, possibly even sub- eV dark matter carrying a net charge that is (approximately) conserved. By making use of the Affleck-Dine mechanism for its production, we show that a sizable fraction of the energy density can be stored in the asymmetric component. We furthermore argue that there exist regions of parameter space where the energy density contained in symmetric particle-antiparticle pairs without net charge can to some degree be depleted by considering couplings to additional fields. Finally, we make an initial foray into the phenomenology of this scenario by considering the possibility that dark matter is coupled to the visible sector via the Higgs portal. arXiv:1906.00969v2 [hep-ph] 2 Sep 2019 1 1 Introduction Very light bosons such as axion(-like) particles or dark photons are increasingly popular dark matter candidates (see, e.g., [1,2] for reviews). Currently, a significant and growing experimental community is set to hunt down these very weakly interacting particles [1,3{17]. -
Signature Redacted Thesis Supervisor Certified By
MASSACHUSETTS INSTMITE A Tale of Two Particles OF TECHNOLOGY by AU6 15 2014 Katelin Schutz LIBRARIES Submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Bachelor of Science in Physics at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 2014 @ Katelin Schutz, MMXIV. All rights reserved. The author hereby grants to MIT permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Signature redacted Author .. .................................. Department of Physics Signature redacted May 9, 2014 Certified by. ........................... A. David Kaiser Germeshausen Professor of the History of Science Senior Lecturer, Department of Physics Signature redacted Thesis Supervisor Certified by.. ............................. Tracy Slatyer Assistant Professor of Physics Signature redacted Thesis Supervisor Accepted by.. ..................... Nergis Mavalvala Senior Thesis Coordinator A Tale of Two Particles by Katelin Schutz Submitted to the Department of Physics on May 9, 2014, in partial fulfillment of the requirements for the degree of Bachelor of Science in Physics Abstract It was the earliest of times, it was the latest of times, it was the age of inflation, it was the age of collapse, it was the epoch of perturbation growth, it was the epoch of perturbation damping, it was the CMB of light, it was the dwarf galaxy of dark- ness, it was the largest of cosmic scales, it was the smallest of Milky Way subhalos, we had multiple nonminimally coupled inflatons before us, we had inelastically self- interacting dark matter before us, we were all going direct to the Planck scale, we were all going direct the other way. -
Electronic Newsletter December 15, 2016
Electronic Newsletter December 15, 2016 In this issue • April Meeting (in January) Washington, DC • DAP Nominations • APS Fellows from DAP • 2017 Bethe Prize • April Meeting Overview • DAP Awards Ceremony • Public Lecture and Plenary Session Highlights • DAP Session Schedule • Focus Sessions sponsored by the DAP • Invited Session Highlights APS DAP Officers 2016–2017: Finalize your plans now to attend the April 2017 meeting held Chair: Julie McEnery this year in January in Washington, DC. A number of plenary and invited sessions will feature presentations by DAP mem- Chair-Elect: Fiona Harrison bers. Here are the key details: Vice Chair: Priyamvada Natarajan Past Chair: Paul Shapiro What: April 2017 APS Meeting Secretary/Treasurer: Scott Dodelson When: Saturday, Jan 28 – Tuesday, Jan 31, 2016 Deputy Sec./Treasurer: Where: Washington, DC (Marriott Wardman Park) Keivan Stassun Member-at-Large: Registration Deadline: January 6, 2017 Brenna Flaugher Division Councilor: The 2017 April Meeting will take place at the Marriott Ward- Miriam Forman man Park. Detailed information for the meeting, including details Member-at-Large: on registration and the scientific program can be found online at Daniel Kasen http://www.aps.org/meetings/april Member-at-Large: Marc Kamionkowski Note that you can still register on-site, if you don’t do so by the Member-at-Large: deadline. Tracy Slatyer Registration fees range from $30 for undergraduates to $480 for full members. Questions? Comments? Newsletter Editor: Keivan Stassun [email protected] Nominations for the APS DAP Executive Committee Officers Deadline: December 21, 2016 Each year the Division of Astrophysics (DAP) of the APS elects new members for the open positions on the DAP Executive Committee. -
TITLES and ABSTRACTS First Name: Andrea Surname: Addazi
TITLES AND ABSTRACTS First Name: Andrea Surname: Addazi Affiliation: Fudan University (Shanghai) Quantum Vacuum & Quantum black holes: two aspects of the same question ---------------------------------------------------------------------------------------- Quantum vacuum and Quantum black holes may be considered as two aspects of the same problem. First of all, we will show how virtual black hole pairs provide a planckian contribution to the vacuum energy which screens the contribution coming from Standard Model vacuum energy. Second, we will move on the possible relation of dark energy and (Anti)evaporation instabilities in the framework of f(R)-gravity, In this case, a model for cosmology may provide insightful intuitions on the black hole thermodynamics and the information paradox. First Name: Imanol Surname: Albarran Affiliation: Universidade da Beira Interior The quantum realm of the "Little Sibling" of the Big Rip singularity ---------------------------------------------------------------------------------------- We analyse the quantum behaviour of the Little Sibling of the Big Rip singularity (LSBR). The quantisation is carried within the geometrodynamical approach given by the Wheeler- DeWitt(WDW)equation. The classical model is based on a Friedmann-Lemaître- Robertson-Walker Universe filled by a perfect fluid that can be mapped to a scalar field with phantom character. We analyse the WDW equation in two setups. In the fi rst step, we consider the scale factor as the single degree of freedom, which from a classical perspective parametrises both the geometry and the matter content given by the perfect fluid. We then solve the WDW equation within a WKB approximation, for two factor ordering choices. On the second approach, we consider the WD equation with two degrees of freedom: the scale factor and a scalar fi eld. -
Reversed out (White) Reversed
Berkeley rev.( white) Berkeley rev.( FALL 2014 reversed out (white) reversed IN THIS ISSUE Berkeley’s Space Sciences Laboratory Tabletop Physics Bringing More Women into Physics ALUMNI NEWS AND MORE! Cover: The MAVEN satellite mission uses instrumentation developed at UC Berkeley's Space Sciences Laboratory to explore the physics behind the loss of the Martian atmosphere. It’s a continuation of Berkeley astrophysicist Robert Lin’s pioneering work in solar physics. See p 7. photo credit: Lockheed Martin Physics at Berkeley 2014 Published annually by the Department of Physics Steven Boggs: Chair Anil More: Director of Administration Maria Hjelm: Director of Development, College of Letters and Science Devi Mathieu: Editor, Principal Writer Meg Coughlin: Design Additional assistance provided by Sarah Wittmer, Sylvie Mehner and Susan Houghton Department of Physics 366 LeConte Hall #7300 University of California, Berkeley Berkeley, CA 94720-7300 Copyright 2014 by The Regents of the University of California FEATURES 4 12 18 Berkeley’s Space Tabletop Physics Bringing More Women Sciences Laboratory BERKELEY THEORISTS INVENT into Physics NEW WAYS TO SEARCH FOR GOING ON SIX DECADES UC BERKELEY HOSTS THE 2014 NEW PHYSICS OF EDUCATION AND SPACE WEST COAST CONFERENCE EXPLORATION Berkeley theoretical physicists Ashvin FOR UNDERGRADUATE WOMEN Vishwanath and Surjeet Rajendran IN PHYSICS Since the Space Lab’s inception are developing new, small-scale in 1959, Berkeley physicists have Women physics students from low-energy approaches to questions played important roles in many California, Oregon, Washington, usually associated with large-scale of the nation’s space-based scientific Alaska, and Hawaii gathered on high-energy particle experiments.