Particle and Astroparticle theory in Sweden Lars Bergström Department of Physics Stockholm University
(c) 2001-2008 Orasis Photo and Pontus Walck
R-ECFA Meeting Uppsala, 9 May 2008 A field with great tradition in Sweden…
Oskar Klein (1894 – 1977)
Klein’s paradox, Klein-Nishina formula, Kaluza- Klein extra dimensions, Alfvén-Klein cosmology,… The Klein lecture and medal
1988 - Chen Ning Yang 1989 - Steven Weinberg 1990 - Hans Bethe 1991 - Alan Guth 1992 - John A. Wheeler 1993 - Tsung-Dao Lee 1994 - The Oskar Klein Centenary Symposium, September 19-21, 1994 1995 - Nathan Seiberg 1996 - Alexander Polyakov 1997 - P. J. E. Peebles 1998 - Edward Witten 1999 - Gerard 't Hooft 2000 - David Gross 2001 - Andrei Linde 2002 - Martin Rees 2003 - Stephen Hawking 2004 - Pierre Ramond 2005 - Yoichiro Nambu The 2008 Klein lecture will be given 2006 - Viatcheslav Mukhanov 2007 - Gabriele Veneziano May 22nd by Helen R. Quinn, SLAC The Swedish Particle-related Theory Map
Theory Exp. Phenom. AP exp. Ap theory
Luleå x (x) Uppsala x x x x (x)
Stockholm x x (x) x x Karlstad x Göteborg x Lund x x Uppsala University
From university-wide evaluation 2007:
”In the Department of Theoretical Physics, panel 13 identified research that has had enormous impact in the field of string theory, obviously of world-leading quality. Other areas of research at the department were also assessed to be first rate and to have international impact.”
“The panel was concerned about a tendency that professors leave after a few years. It recognizes that this may be a sign of high quality of individuals but it underlines that it is important to make positions more attractive, e.g. by distributing teaching load in a different way.” Ulf Danielsson, Professor Ulf Lindström, Joseph Minahan, dS/CFT correspondence, Professor Professor Transplanckian cosmology Complex Geometry, AdS/CFT Supersymmetry correspondence, Integrability
A. Alekseev, leave of absence
M. Zabzine, Research Assistant D. Chialva & J. Qiu, Postdocs
H. Rubinstein, prof. em. (Executive Editor of Antti Niemi, Professor Konstantin Zarembo, Associate JHEP and JCAP) Mathematical physics from professor fundamental interactions to protein Yang-Mills Theory, AdS/CFT + 11 PhD Students folding correspondence Göteborg
University Lars Brink, Martin Cederwall, Gabriele Ferretti, Professor Professor Professor Superstring String theory, M- String theory, The Göteborg group: Theory, theory Gauge theory, Originators of supersymmetry Supergravity, Supersymmetry Supersymmetric and string theory in Sweden, gauge field and to some extent, in the world theories, gauge field theories. (e.g., Brink, Schwarz & Scherk, 1976: ”Supersymmetric Yang- Mills Theories”)
Ulf Gran, N. Wyllard Research Assistants Bent E W Nilsson, 1 Postdoc Professor (+ 1 Postdoc in Måns Henningson, String/M theory, Robert Marnelius, astroparticle theory: Professor supergravity, quantum Professor Julia Becker) Theoretical gravity, conformal field Theoretical Particle elementary particle theory, Kac-Moody and Physics and 4 PhD students physics vertex operator algebra, related elementary particle mathematics Per Salomonson, physics, cosmology, Lecturer integrable systems Cosmology, Particle Astrophysics and Strings (CoPS) group at Physics Department, Stockholm University
A new group, formed in 2004 by joining parts of the Field and Particle Theory, and Experimental Particle Physics groups.
The group participates in the AlbaNova High Energy Astrophysics and Cosmology (HEAC) excellence centre, funded by the Swedish Research Council, together with groups from the Astronomy Department and Royal Institute of Technology Physics Department. Lars Bergström, Joakim Edsjö, Ariel Goobar, Edvard Mörtsell, Professor Associate Professor Professor Associate Professor Cosmology and Dark Supersymmetry, Supernova Cosmology, Matter , DarkSUSY Cosmology Project, supernovae, weak Supersymmetry, Gruber Prize winner lensing Higgs, KK models 2007
Marcus Berg, Research Assistant Jan Conrad, Research Assistant
Guest Professor: H. Rubinstein (see Uppsala)
Postdocs: Serena Nobili, Christine Meurer, Vallery Stanishev
10 PhD students (2 female)
Bo Sundborg, Fawad Hassan, Associate Professor Associate Professor String theory, string String theory, string cosmology cosmology New! In January, 2007, NORDITA moved from Copenhagen to Stockholm (the AlbaNova campus)
NORDITA is the Nordic Institute for Theoretical Physics. Its purpose is to carry out research and strengthen the Nordic collaboration within the basic areas of theoretical physics. The main research areas at Nordita are: Astrophysics and Astrobiology Biological Physics Condensed Matter and Statistical Physics High Energy and Nuclear Physics
The institute is run jointly by Royal Institute of Technology (KTH) and Stockholm University and is located on the premises of AlbaNova University Center in Stockholm One more assistant professor being announced in ”High energy theoretical physics (such as LHC physics and/or string theory)” Paolo di Vecchia, Stefan Hofmann, Ulf Lindström, Professor Assistant Prof. Adjunct Also, presently 5 String theory Astroparticle Professor Fellows: 2 in string theory Complex theory, 1 relativistic Geometry, astrophysics, 1 Supersymmetry cosmology, and 1 supersymmetry
Programmes: Frank Wilczek spent TeV Scale Physics and Dark Matter autumn 2007, at 1 June - 31 July 2008 NORDITA Stockholm Geometrical Aspects of String Theory 15 October - 15 December 2008 Jürgen Fuchs, Professor Mathematical Physics, Conformal Field Theory, String theory
+ 3 PhD students
Stephen Hwang, Professor Mathematical Physics, String theory Sverker Fredriksson,
Division of Physics Professor
SE-971 87 Luleå Tel: +46 (0)920-49 11 07 Fax: +46 (0)920-49 10 84 E-mail: Physics Composite quarks and leptons; diquarks
Johan Hansson, Lecturer Preon stars
”Preon star” Trend in Sweden since beginning of 1990’s:
Particle Physics Astroparticle physics
AMANDA, IceCube, GLAST, SPS, LEP,……, LHC PAMELA, PoGo Higgs, SUSY, Higgs, SUSY, Neutrinos, Dark Neutrinos Matter, Dark Energy Trend in Sweden from beginning of 2010’s ?
Particle Physics Astroparticle Dark Matter! physics
AMANDA, IceCube, GLAST, SPS, LEP,……, LHC,…., ILC PAMELA, PoGo Higgs, SUSY Higgs, SUSY New Physics required in cosmology: Dark Matter and Dark Energy, Matter-Antimatter Asymmetry.
Also in particle physics: Neutrino Masses, Hierarchy mW << mPl
Ordinary matter: Physics Dark Matter: of the Standard Model What is it? Is it 4 % related to new particle 23 % physics beyond the 73 % SM? Does it have a signature at LHC or in direct and indirect Dark energy: cosmological detection constant or time-evolving field experiments? (quintessence or k-essence?) Latest results from the Supernova Cosmology Project
Stockholm Supernova Cosmology Group led by A.Goobar, CoPS Is the dark energy density constant or not?
Current data compatible with w
SNAP: contender for the next generation of experiments: SNe + weak lensing Other large SN-projects with participation of the Stockholm group
• SuperNova Legacy Survey, SNLS (2003-2008): More than 500 supernovae with z<1 • Sloan Digital Sky Survey, SDSS - II (2005-2007): More than 500 SNe with z around 0.2 Dark Matter
Methods of Weakly Interacting Massive Particle (WIMP) Dark Matter detection: Direct detection • Discovery at accelerators (Fermilab, LHC,...) • Direct detection of halo particles in terrestrial detectors • Indirect detection of neutrinos, gamma rays, radio waves, antiprotons, positrons in earth- or space-based experiments • For a convincing claim, probably need more than one method
The basic process for indirect detection is annihilation, e.g., neutralinos:
Enhanced for _ 2 p ann n v clumpy halo; near galactic centre and in Sun & Earth e+ Indirect detection Via Lactea simulation (J. Diemand & al, 2006)
21 Tool for computing cosmological relic density, masses, branching ratios, direct and indirect detection cross sections for general WIMPs, especially super- symmetric ones:
P. Gondolo, J. Edsjö, L.B., P. Ullio, Mia Schelke and E. A. Baltz, JCAP 2004 Example of more ”conventional” Dark Matter model: One extra, Inert, Higgs Doublet
No data exists in this range! GLAST will get it!
Ordinary Higgs can be as heavy as 300 GeV without violation of electroweak precision tests
40 – 70 GeV inert Higgs gives correct dark matter density
The perfect candidate for detection in GLAST!
M. Gustafsson , L.B., J. Edsjö, E. Lundström, PRL 2007
Can be searched for at LHC through cf. A. Goobar, S. Hannestad, E. Mörtsell & H. Tu:
m 0.62 eV i i May 2010
ATLAS Reveals Dark Matter Particle