Dark Energy and Its Cosmic Density from Einstein's Relativity And
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The Messenger
THE MESSENGER No. 35-March 1984 Report on the First ESO-CERN Symposium on "Large Scale Structure of the Universe, Cosmology and Fundamental Physics" G. Setti, ESO The first ESO-CERN Symposium was held at CERN, deuterium, were produced when the age of the Universe was Geneva, from 21 st to 25th November 1983 and was attended only about 100 seconds, the temperature about one billion by approximately 200 participants. The discussions concen degrees and the density of the order of the density of water, in trated on the general field of Cosmology, where the progress a phase that lasted about 8 minutes. At that moment the made in the past twenty years, both in elementary particles Universe was essentially a gaseous mixture composed of and astronomy, has shown that these two fields of basic protons, neutrons, electrons, positrons, neutrinos and anti research are merging toward a new and fundamental under neutrinos (and perhaps some other exotic particles, such as standing of the laws that govern our Universe. A detailed photinos) immersed in a heat bath of photons. The equilibrium account is contained in the Proceedings of the Symposium between these components is maintained by the weak which will be available in a few months. interaction, one of the four fundamental forces wh ich are The meeting was started with an introductory lecture by believed to govern all natural phenomena.* The weak force D. W. Sciama (Oxford and Trieste) who highlighted the numer together with the "hot big-bang" model allows definite predic ous and fundamental problems the understanding of which tions about the abundances of primordial elements. -
Extending Symmetries of the Standard Model Towards Grand Unification
Master research Extending Symmetries of the Standard Model towards Grand Unification Anno Touwen Supervisor prof. dr. Dani¨el Boer August 3, 2018 Abstract In this master thesis the spacetime, global and gauge symmetries of the Standard Model are reviewed. These symmetries are used as a basis for finding possible extensions of this successful model, such as the two Higgs doublet model and Left-Right model. Methods of finding subgroups and the slitting up of representations are discussed based on Dynkin diagrams. These methods are applied to analyse the subgroups of the exceptional group E6 as candidates for Grand Unified 3 Theory groups. In this study SU(5), SO(10) and SU(3) and SU(4)×SU(2)×SU(2) are most important. A phenomenological comparison between these models is given focussed on the different types of leptoquarks that could be responsible for the not yet observed proton decay. Contents 1 Introduction 3 2 Symmetry groups and Gauge theories 5 2.1 Group theory . .5 2.2 Unitary and Special Unitary groups . .8 2.3 Orthogonal and Special Orthogonal groups . 10 2.4 Gauge theories and fields . 11 2.5 Spacetime symmetries . 13 2.6 C, P and T transformations . 14 3 The Standard Model 16 3.1 The Electroweak interaction . 16 3.2 The Strong interaction . 19 3.3 Fermion content . 19 3.4 Eigenstates and the CKM-matrix . 22 3.5 Global symmetries . 23 4 Beyond the Standard Model 28 4.1 Two Higgs doublet model . 28 4.2 Left-Right models . 34 5 A further study of Lie Groups and Algebras 37 5.1 Root systems . -
Anomaly and Cobordism Constraints Beyond the Standard Model
Anomaly and Cobordism Constraints Beyond the Standard Model: Topological Force Juven Wang Center of Mathematical Sciences and Applications, Harvard University, Cambridge, MA 02138, USA Abstract Standard lore uses perturbative local anomalies to check the kinematic consistency of gauge theories coupled to chiral fermions, such as the Standard Models (SM) of particle physics. In this work, based on a systematic cobordism classification, we examine the constraints from invertible quantum anomalies (including all perturbative local anomalies and all nonperturbative global anomalies) for SM and chiral gauge theories. We also clarify the different uses of these anomalies: including (1) anomaly cancellations of dynamical gauge fields, (2) ’t Hooft anomaly matching conditions of background fields of global symmetries. We apply several 4d anomaly constraints of Z16, Z4, and Z2 classes, beyond the familiar Feynman-graph perturbative Z class local anomalies. As an application, for SU(3)×SU(2)×U(1) Zq SM (with q = 1; 2; 3; 6) and SU(5) Grand Unification with 15n chiral Weyl fermions and with a discrete baryon minus lepton number X = 5(B L) 4Y preserved, we discover a new hidden gapped sector previously unknown to the SM and− Georgi-Glashow− model. The gapped sector at low energy contains either (1) 4d non-invertible topological quantum field theory (TQFT, above the energy gap with heavy fractionalized anyon excitations from 1d particle worldline and 2d string worldsheet, inaccessible directly from Dirac or Majorana mass gap of the 16th Weyl fermions [i.e., right-handed neutrinos], but accessible via a topological quantum phase transition), or (2) 5d invertible TQFT in extra dimensions. -
Elsevier - Wikipedia
9/23/2020 Elsevier - Wikipedia Elsevier Elsevier (Dutch: [ˈɛlzəviːr]) is a Netherlands-based information and analytics company specializing in scientific, technical, and medical content. It is a part of the RELX Group, known until 2015 as Reed Elsevier. Its products Elsevier include journals such as The Lancet and Cell, the ScienceDirect collection of electronic journals, the Trends and Current Opinion series of journals, the online citation database Scopus, SciVal, a tool that measures research performance, and the ClinicalKey search engine for clinicians. Elsevier's products also include digital tools for data management, instruction, and assessment.[3][4] Elsevier publishes more than about 500,000 articles annually in 2,500 journals.[1] Its archives contain over 17 million documents and 40,000 e-books. Total yearly downloads amount to more than 1 billion.[1] Elsevier's high operating profit margins (37% in 2018) and 950 million pounds in profits, often on publicly funded research works[1][5] and its copyright practices have subjected it to criticism by researchers.[6] Contents Industry Publishing Founded 1880 History Headquarters Amsterdam, Company statistics Netherlands Market model Revenue £2.54 billion Products and services (2018)[1] Research and information ecosystem Net income 600,000,000 United [2] Conferences States dollar Pricing (2009) Shill review offer Number of 6,900 (2008) employees Blocking text mining research Parent RELX Academic practices www.elsevier.com "Who's Afraid of Peer Review" Website (https://www.elsevie Fake -
Global Journal of Science Frontier Research: a Physics & Space Science
Online ISSN : 2249-4626 Print ISSN : 0975-5896 DOI : 10.17406/GJSFR OutlineofRealPhysics QuantumSetTheoryProposal ProgressinPhysicsandCosmology CrystallizationofMagneticMoments VOLUME20ISSUE3VERSION1.0 Global Journal of Science Frontier Research: A Physics & Space Science Global Journal of Science Frontier Research: A Physics & Space Science Volume 20 Issue 3 (Ver. 1.0) Open Association of Research Society Global Journals Inc. © Global Journal of Science (A Delaware USA Incorporation with “Good Standing”; Reg. Number: 0423089) Frontier Research. 2020 . Sponsors:Open Association of Research Society Open Scientific Standards All rights reserved. This is a special issue published in version 1.0 Publisher’s Headquarters office of “Global Journal of Science Frontier Research.” By Global Journals Inc. Global Journals ® Headquarters All articles are open access articles distributed 945th Concord Streets, under “Global Journal of Science Frontier Research” Framingham Massachusetts Pin: 01701, Reading License, which permits restricted use. United States of America Entire contents are copyright by of “Global USA Toll Free: +001-888-839-7392 Journal of Science Frontier Research” unless USA Toll Free Fax: +001-888-839-7392 otherwise noted on specific articles. No part of this publication may be reproduced Offset Typesetting or transmitted in any form or by any means, electronic or mechanical, including G lobal Journals Incorporated photocopy, recording, or any information storage and retrieval system, without written 2nd, Lansdowne, Lansdowne Rd., Croydon-Surrey, permission. Pin: CR9 2ER, United Kingdom The opinions and statements made in this book are those of the authors concerned. Packaging & Continental Dispatching Ultraculture has not verified and neither confirms nor denies any of the foregoing and no warranty or fitness is implied. -
Searching for New Physics with Ultrahigh Energy Cosmic Rays
Searching for New Physics with Ultrahigh Energy Cosmic Rays Floyd W Steckert Astrophysics Science Division NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Sean T Scully Dept. of Physics and Astronomy James Madison University, Harrisonburg, VA 22807, USA Abstract. Ultrahigh energy cosmic rays that produce giant extensive showers of charged particles and photons when they interact in the Earth’s atmosphere provide a unique tool to search for new physics. Of particular interest is the possibility of detecting a very small violation of Lorentz invariance such as may be related to the structure of space-time near the Planck scale of — 10 -35m. We discuss here the possible signature of Lorentz invariance violation on the spectrum of ultrahigh energy cosmic rays as compared with present observations of giant air showers. We also discuss the possibilities of using more sensitive detection techniques to improve searches for Lorentz invariance violation in the future. Using the latest data from 23 , the Pierre Auger Observatory, we derive a best fit to the LIV parameter of 3 .0±3:0 x 10- corresponding to an upper limit of 4.5 x 10-23 at a proton Lorentz factor of — 2 x 10 11 . This result has fundamental implications for quantum gravity models. 1. Introduction 1.1. Why Test Fundamental Physics at Ultrahigh Energies? Owing to the uncertainty principle, it has long been realized that the higher the particle energy attained, the smaller the scale of physics that can be probed. Thus, optical, UV and X-ray observations led to the understanding of the structure of the atom, -y-ray observations led to an understanding of the structure of the atomic nucleus, and deep inelastic scattering experiments with high energy electrons led to an understanding of the structure of the proton. -
Searches for Double Beta Decay the Allure of Ultra-Sensitive Experiments Carter Hall, Univ
Searches for Double Beta Decay The Allure of Ultra-Sensitive Experiments Carter Hall, Univ. of Maryland - February 18, 2014! Outline • The Majorana/Dirac question • Is neutrino mass an example of beyond-standard-model physics? • Double beta decay as a Majorana/Dirac discriminant • Experimental techniques and challenges • Current status of experimental efforts Spin 1/2 mass spectrum 1st 2nd 3rd TeV Higgs! t b GeV c τ s 5 µ ~10 d MeV u e Fermion Mass Fermion keV ~105 eV at least one neutrino meV Charged fermions masses are due to interactions with the Higgs top quark: H H H H tL tL tL tL tL t t tR R R tR tR H H H H H mass term H electron - - e L - e R e R H Dirac mass term: conserves charge (e- →e-) Spin 1/2 mass spectrum 1st 2nd 3rd TeV t b GeV c τ s 5 µ ~10 d MeV u e Fermion Mass Fermion keV ~105 eV at least one neutrino meV Higgs? Types of Neutrino mass terms Dirac Neutrino Mass Standard model X ν Higgs creates only νR L Conserves Dirac masses! lepton number Majorana Mass 1 X ν νR L violates conservation of lepton number Majorana Mass 2 Neutrinos could, X νR νL in principle, have more than one mass term. What if neutrinos have two mass terms? Dirac Mass Dirac Mass (Higgs?) (Higgs?) X X νL ν νR R X νL Majorana Mass (New physics) Majorana ν νL Neutrino R Mass If neutrinos have more than one mass term, then they are Majorana particles. -
Beyond the Standard Model
Beyond the Standard Model V. Hedberg Beyond the Standard Model 1 The Standard Model What is the standard model ? The standard model describes the electromagnetic, strong and weak interactions. It is based on the principle of gauge invariance. The model has lots of free parameters: lepton and quark masses, coupling constants, quark and neutrino mixing parameters, W, Z and H masses... H It uses a basic set of fermions and gauge bosons: W Z g V. Hedberg Beyond the Standard Model 2 The Standard Model The Standard Model agrees very well with all experimental data. The model has been tested down to 10-18 m. It has been tested to a precision better than 0.1% . Problems with the standard model: Does the Higgs exist ? If neutrinos have mass, are there right-handed neutrinos ? Why are there 3 generations ? What about gravity ? V. Hedberg Beyond the Standard Model 3 The Standard Model Why are the masses so different (the hierarchy problem) ? Can the strong and electroweak interaction be described by a unified theory ? What happened with the anti-matter in the Big Bang ? What is dark matter ? What is dark energy ? V. Hedberg Beyond the Standard Model 4 Grand Unified Theories (GUTs) The Georgi-Glashow model Weak and electromagnetic interactions are unified, why not to add the strong one ? g2 g 2 s ’ W W= =8 =8 W We know that coupling 4 4 g’2 g 2 constants are not truely ’ = =8 Z =8 Z 4 4 Z constant but that they g 2 = s depend on energy (or Q2) ’ s 4 W g 2 in the interaction. -
Looking for the God Particle at the Large Hadron Collider Mary Beth De Repentigny
Papers Looking for the God Particle at the Large Hadron Collider Mary Beth De Repentigny The Large Hadron Collider at CERN is scheduled to begin colliding protons in October of this year. Two of its main goals are to look for both the Standard Model’s Higgs particle and supersymmetry’s sparticles. An objective overview of these theories, along with string theory, reveals the precarious balancing act that high-energy physics is in because of theorists’ attempts to explain away fine-tuning which points to an intelligent designer. Ironically, their foundational theory is rooted in a faith in very large numbers that they hope will cancel out impossible odds. n the autumn of 1993, a vote came before the United 11,000 loops per second around the circle, reaching a speed IStates Congress to continue funding construction of the to within 10 km per hour of the speed of light, making Superconducting Super Collider near Waxahachie, Texas. 50 million collisions within a second. Powerful particle It was to be a machine that would produce 40 trillion detectors will register the direction and energy of the electron-volts (TeV) of energy, twenty times the total resultant particle debris and collect a full DVD’s worth of energy of the Tevatron near Chicago, which was, at the data every five seconds. According to current schedule, the time the highest-energy particle accelerator in the world. first beam of protons will circulate through the entire LHC Although two billion dollars had already been poured on September 10, 2008. The first collisions will occur after into the project, and 22 km of the total 87 km tunnel had its official unveiling on October 21, 2008. -
Predictive Physics of Inflation and Grand Unification for and from the CMB Observations
Contribution Prospectives IN2P3 2020 Predictive Physics of Inflation and Grand Unification for and from the CMB observations Principal Author: Name: Norma G. SANCHEZ Institution: CNRS LERMA OP-PSL SU Email: [email protected] Phone: 06 08 34 09 38 Abstract : Inflation is today part of the Standard Model of the Universe supported by the cosmic microwave background (CMB), large scale structure (LSS) and other precision cosmological data. It solves the horizon and flatness problems and naturally generates the density fluctuations that seed LSS, CMB anisotropies, and tensor perturbations (primordial gravitational waves of quantum origin: the primordial gravitons). Inflation is based on a scalar field ϕ (the inflaton) whose potential is fairly flat leading to a slow-roll evolution. This white paper to the IN2P3 prospective focuses on the following, realistic and timely situations of inflation in connection with the CMB, gravitational and particle physics, adding inter- disciplinarity and unification values within a strongly predictive physical approach. The formulation of inflation in the Ginsburg-Landau approach clarifies and places inflation in the setting of the effective field theories of particle physics. In addition, it sets up a clean way to directly confront the inflationary predictions with the available and forthcoming CMB data and select a definitive model. In the effective theory of inflation `a la Ginsburg-Landau the inflaton potential is a polynomial in the field ϕ, highlighting and capturing the relevant scales of the 4 problem with a universal form V (ϕ) = N M w(ϕ/[√N MPl]), where M ≪ MPl is the scale of inflation and N ∼ 60 is the number of Inflation efolds, (MPl is the Planck scale).The slow-roll expansion thus becomes a systematic 1/N expansion and the inflaton couplings become 2 naturally small as powers of the ratio (M/MPl) . -
Freya Blekman
Application Form Odysseus-programme Part A: Administrative Details and Project Summary Administrative Details of Applicant Family Name Blekman Birth Family Name First Name (s) Freya Male Gender Female x Date of Birth (16/11/1974) 1st Nationality Dutch 2nd Nationality Country of Residence Switzerland Country of Birth Netherlands Contact address Street Name and number Rue de Lausanne 87 PO Box Postal Code 1202 Cedex Town Genève Country Switzerland Phone 1 +41 765467148 Phone 2 Fax e-mail Freyaf [email protected] Qualifications University degree Date of award (DD/MM/YYYY) 09/02/2000 Doctorate Date of award (DD/MM/YYYY) 01/04/2005 Full-time postdoctoral experience Number of months In Oct 2008: 43 months Place of activity (previous 5 years) From 2000 To 2005 Country 60 % Netherlands, 40% United States From 2005 To 2007 Country United Kingdom From 2007 To Now Country United States and Switzerland Proposed start date of the Award (01/10/2009) Choose Odysseus Group I project Odysseus Group II project Administrative Details of Host Institution Name of host institution Name of research unit/department Local co-promotor Legal address Street Name and Number Postal Code Town Country Phone 1 Phone 2 Fax Web site Part A: Administrative Details and Project Summary Project Summary Project title (maximum 100 characters) New physics at the Energy Frontier: Supersymmetry search at the Compact Muon Solenoid Project summary (maximum 300 words) At the presently accessible energies, elementary particle interactions are well described by the Standard Model. The Standard Model however has some fundamental limitations, and is expected to be no longer valid at energies that are easily accessed by the Large Hadron Collider (LHC) when it starts operation in 2009 The LHC will collide protons at a centre-of-mass energy of 14 TeV, which is a factor 7 higher than Tevatron, the most powerful accelerator in operation Today. -
Mohamed El Naschie Photo Gallery
Chaos, Solitons and Fractals 25 (2005) 915–933 www.elsevier.com/locate/chaos Photo Gallery Mohamed El Naschie Photo 1. Mohamed El Naschie in Cairo, Egypt, 2004. doi:10.1016/j.chaos.2005.02.020 916 Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 Photo 2. Honouring Mohamed El Naschie in the Institute of Physics, University of Frankfurt, Frankfurt, Germany. Photo 3. In clockwise order: (a) El Naschie with Professor Peter Weipel looking into the ‘‘Festschrift’’ dedicated to Mohamed El Naschie. (b) Together with Otto Rossler and David Finkelstein. (c) Between Peter Weipel and Professor Dr. Dr. habil Multi Walter Greiner and Prof. Dr. Dr. habil Werner Martienssen. (d) El Naschie with Professor Otto Rossler, Dr. Hans Diebner and Peter Weipel. Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 917 Photo 4. El Naschie with Nobel Laureate Gerardus ÕtHooft. 918 Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 Photo 5. Top: El Naschie with Nobel Laureate Gerd Binnig. Bottom: taken after giving his lecture dedicated to the memory of Nobel Laureate Ilya Prigogine. Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 919 Photo 6. The transfinite Cantorian spacetime trio: Garnet Ord, Laurent Nottale and Mohamed El Naschie in 1998. 920 Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 Photo 7. Top: El Naschie with Garnet Ord. Bottom: El Naschie dedicating his lecture to the memory of his teacher, Nobel Laureate Ilya Prigogine. Photo Gallery / Chaos, Solitons and Fractals 25 (2005) 915–933 921 Photo 8. Top: Nobel Laureate Gerardus ÕtHooft and M.S.