Pre-launch estimates for GLAST sensitivity to Dark Matter annihilation signals (2008)
Baltz, E. A., Berenji, B., Bertone, G., Bergstrom, L., Bloom, E., Bringmann, T., ...
We investigate the sensitivity of the Gamma-ray Large Area Space Telescope (GLAST) to indirectly detect weakly interacting massive particles (WIMPs) through the $\gamma$-ray signal that their pair...
Science with the new generation high energy gamma- ray experiments (2007)
Alvarez, M., D'Armiento, D., Agnetta, G., Alberdi, A., Antonelli, A., Argan, A., ...
This Conference is the fifth of a series of Workshops on High Energy Gamma- ray Experiments, following the Conferences held in Perugia 2003, Bari 2004, Cividale del Friuli 2005, Elba Island 2006....
Radiative Scattering of Neutralino Dark Matter (2007)
Aminneborg Bergstrom And, S. Aminneborg, L. Bergstrom, B. A. Lindholm
We investigate scattering between a photino and a nucleus accompanied by direct photon emission. We find that, as in the case of nuclear excitation with delayed gamma emission, the cross sections are...
Cosmological WIMPs, Higgs Dark Matter and GLAST (2007)
Sellerholm, A., Conrad, J., Bergstrom, L., Edsjo, J.
Measurement of the extragalactic background (EGBR) of diffuse gamma-rays is perhaps one of the most challenging tasks for future gamma-ray observatories, such as GLAST. This is because any...
Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy (2006)
Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...
The Supernova / Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe's expansion by...
An Integral Field Spectrograph for SNAP Supernova Identification (2006)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
A well-adapted spectrograph concept has been developed for the SNAP (SuperNova/Acceleration Probe) experiment. The goal is to ensure proper identification of Type Ia supernovae and to standardize the...
Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)
Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...
For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...
Wide-field surveys from the SNAP mission (2005)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
Complex Curvatures in Form Theory and String Theory (2005)
Akner-Koler, Cheryl., Bergstrom, L. (Lars)
Leonardo - Volume 38, Number 3, June 2005
Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)
Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...
For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...
Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)
Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...
For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...
McNeill, Ann Marie, Eriksen, J., Bergstrom, L., Smith, K. A., Marstorp, H., Kirchmann, H., ...
The definitive version is available at www.blackwell-synergy.com
McNeill, Ann Marie, Eriksen, J., Bergstrom, L., Smith, K. A., Marstorp, H., Kirchmann, H., ...
The definitive version is available at www.blackwell-synergy.com
DarkSUSY: Computing Supersymmetric Dark Matter Properties Numerically (2004)
Gondolo, P., Edsjo, J., Ullio, P., Bergstrom, L., Schelke, M., Baltz, E. A.
The question of the nature of the dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candidates is the...
Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy (2004)
Aldering, SNAP Collaboration: G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...
The Supernova / Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe's expansion by...
No evidence for Dark Energy Metamorphosis ? (2004)
Jonsson, J., Goobar, A., Amanullah, R., Bergstrom, L.
Recent attempts to fit Type Ia supernova data by modeling the dark energy density as a truncated Taylor series have suggested the possibility of metamorphosis, i.e., a rapidly evolving equation of...
SNAP Satellite Focal Plane Development (2003)
Bebek, C., Akerlof, C., Aldering, G., Amanullah, R., Astier, P., Baltay, C., ...
The proposed SuperNova/Acceleration Probe (SNAP) mission will have a two-meter class telescope delivering diffraction-limited images to an instrumented 0.7 square degree field in the visible and...
Overview of the SuperNova/Acceleration probe (SNAP) (2003)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2003)
Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...
Detection of Leptonic Dark Matter (2002)
Weakly interacting massive particles (WIMPs) are among the favored candidates for cold dark matter in the universe. The phenomenology of supersymmetric WIMPs has been quite developed during recent...
Can MAP and Planck map Planck physics? (2002)
Bergstrom, L., Danielsson, U. H.
We investigate whether a recently proposed modulation of the power spectrum of primordial density fluctuations generated through transplankian (maybe stringy) effects during inflation can be...
The SNAP near infrared detectors (2002)
Tarle, G., Akerlof, C., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
An integral field spectrograph for SNAP supernova studies (2002)
Ealet, Anne, Prieto, E., Bonissent, A., Malina, R., Basa, S., LeFevre, O., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, Gregory L., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Wide-field surveys from the SNAP mission (2002)
Kim, Alex G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
SNOC: a Monte-Carlo simulation package for high-z supernova observations (2002)
Goobar, A., Mortsell, E., Amanullah, R., Goliath, M., Bergstrom, L., Dahlen, T.
We present a Monte-Carlo package for simulation of high-redshift supernova data, SNOC. Optical and near-infrared photons from supernovae are ray-traced over cosmological distances from the simulated...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, G., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Wide-field surveys from the SNAP mission (2002)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
Overview of the SuperNova/Acceleration probe (SNAP) (2002)
Aldering, G., Akerlof, C.W., Amanullah, R., Astier, P., Barrelet, E., Bebek, C., ...
Wide-field surveys from the SNAP mission (2002)
Kim, A.G., Akerlof, C.W., Aldering, G., Amanullah, R., Astier, P., Barrelet, E., ...
Determining the fraction of compact objects in the Universe using supernova observations (2001)
Moertsell, E., Goobar, A., Bergstrom, L.
We investigate the possibility to determine the fraction of compact objects in the Universe by studying gravitational lensing effects on Type Ia supernova observations. Using simulated data sets from...
Non-Baryonic Dark Matter - Observational Evidence and Detection Methods (2000)
The evidence for the existence of dark matter in the universe is reviewed. A general picture emerges, where both baryonic and non-baryonic dark matter is needed to explain current observations. In...
Dynamical effects of a cosmological constant (2000)
The observational evidence for the existence of a non-zero cosmological constant is getting stronger. It is therefore timely to address the question of its eventual effect on the dynamics of...
Indirect detection of neutralino dark matter (1999)
Dark matter detection experiments are getting ever closer to the sensitivity needed to detect the primary particle physics candidates for nonbaryonic dark matter. Indirect detection methods include...
Constraints on the Variation of the Fine Structure Constant from Big Bang Nucleosynthesis (1999)
Bergstrom, L., Iguri, S., Rubinstein, H.
We put bounds on the variation of the value of the fine structure constant $\alpha$, at the time of Big Bang nucleosynthesis. We study carefully all light elements up to $^7$Li. We correct a previous...
Cosmic antiprotons as a probe for supersymmetric dark matter? (1999)
Bergstrom, L., Edsjo, J., Ullio, P.
The flux of cosmic ray antiprotons from neutralino annihilations in the galactic halo is computed for a large sample of models in the MSSM (the Minimal Supersymmetric extension of the Standard...
Indirect detection of dark matter in km-size neutrino telescopes (1999)
Gondolo, Paolo, Bergstrom, L.; Edsjo, J.
Neutrino telescopes of kilometer size are currently being planned. They will be two or three orders of magnitude larger than presently operating detectors, but they will have a much higher muon...
Indirect Detection of Dark Matter in km-size Neutrino Telescopes (1998)
Bergstrom, L., Edsjo, J., Gondolo, P.
Neutrino telescopes of kilometer size are currently being planned. They will be two or three orders of magnitude bigger than presently operating detectors, but they will have a much higher muon...
Clumpy Neutralino Dark Matter (1998)
Bergstrom, L., Edsjo, J., Gondolo, P., Ullio, P.
We investigate the possibility to detect neutralino dark matter in a scenario in which the galactic dark halo is clumpy. We find that under customary assumptions on various astrophysical parameters,...
Possible Indications of a Clumpy Dark Matter Halo (1998)
Bergstrom, L., Edsjo, J., Ullio, P.
We investigate if the gamma ray halo, for which recent evidence has been found in EGRET data, can be explained by neutralino annihilations in a clumpy halo. We find that the measured excess gamma ray...
Bergstrom, L, Kirchmann, H.(Holger)
The product of a symposium held at the University of Zimbabwe in May 1996
The AMANDA Neutrino Telescope and the Indirect Search for Dark Matter (1998)
Francis Halzen For, R. C. Bay, Y. He, D. Lowder, P. Miocinovic, ...
With an effective telescope area of order 10 4 m 2 , a threshold of 50 GeV and a pointing accuracy of 2.5 degrees, the AMANDA detector represents the first of a new generation of high energy neutrino...
Observability of Gamma Rays from Dark Matter Neutralino Annihilations in the Milky Way Halo (1997)
Bergstrom, L., Ullio, P., Buckley, J.
Recent advances in N-body simulations of cold dark matter halos point to a substantial density enhancement near the center. This means that, e.g., the $\gamma$ ray signals from neutralino dark matter...
Non-Baryonic Dark Matter (1997)
The need for dark matter is briefly reviewed. A wealth of observational information points to the existence of a non-baryonic component. To the theoretically favoured candidates today belong axions,...
Neutralino Annihilation into a Photon and a Z boson (1997)
A full one-loop calculation of neutralino S-wave annihilation into the $Z\gamma$ final state is performed in the minimal supersymmetric extension of the Standard Model. This process, like the similar...
Full One-loop Calculation of Neutralino Annihilation into Two Photons (1997)
For the first time, a full one-loop calculation of the process $\chi\chi\to 2\gamma$ is performed, where $\chi$ is the lightest neutralino in the minimal supersymmetric extension of the Standard...
High-Energy Gamma and Neutrino Astronomy (1997)
An overview is given of high-energy gamma-ray and neutrino astronomy, emphasizing the links between the two fields. With several new large detectors just becoming operational, the TeV gamma-ray and...
Astrophysical-Neutrino Detection with Angular and Energy Resolution (1997)
Bergstrom, L., Edsjo, J., Kamionkowski, M.
We investigate the improvement in sensitivity to astrophysical point sources of energetic ($\gtrsim1$ GeV) neutrinos which can be achieved with angular and/or energy resolution of the...
Optical Properties of Deep Ice at the South Pole - Absorption (1997)
We discuss recent measurements of the wavelength-dependent absorption coefficients in deep South Pole ice. The method uses transit time distributions of pulses from a variable-frequency laser sent...
THE AMANDA EXPERIMENT - status and prospects for indirect Dark Matter detection (1996)
At the AMANDA South Pole site, four new holes were drilled to depths 2050 m to 2180 m and instrumented with 86 photomultipliers (PMTs) at depths 1520-2000 m. Of these PMTs 79 are working, with 4-ns...
Indirect Neutralino Detection Rates in Neutrino Telescopes (1996)
Bergstrom, L., Edsjo, J., Gondolo, P.
Neutralinos annihilating in the center of the Sun or the Earth may give rise to a detectable signal of neutrinos. We derive the indirect detection rates for neutrino telescopes in the minimal...
Direct detection of neutralino dark matter and b->s+gamma decays (1996)
We analyze the direct detection rate of minimal supersymmetric neutralino dark matter in germanium, sapphire and sodium iodide detectors, imposing cosmological and accelerator bounds including those...
Limits on direct detection of neutralino dark matter from b -> s gamma decays (1995)
We analyze the rate of detection of minimal supersymmetric neutralino dark matter in germanium, sapphire and sodium iodide detectors, imposing cosmological and recent accelerator bounds including...
Gamma ray lines from TeV dark matter (1994)
We calculate, using unitarity, a lower bound on the branching ratio $\chi\chi\to \gamma\gamma$ and $\chi\chi\to \gamma Z$, where $\chi$ is any halo dark matter particle that has $W^+W^-$ as one of...
QCD corrections to direct B -> J/Psi decays (1994)
We calculate next to leading order QCD corrections to the direct decays b -> J/Psi + X and b -> eta_c + X. The strong renormalization scale dependence is seen to persist also in this order and in...
Elkin, P. L., Ruggieri, A. P., Brown, S. H., Buntrock, J., Bauer, B. A., Wahner-Roedler, D., ...
BACKGROUND: Concept-based Indexing is purported to provide more granular data representation for clinical records.1,2 This implies that a detailed clinical terminology should be able to provide...
A randomized controlled trial of concept based indexing of Web page content.
Elkin, P. L., Ruggieri, A., Bergstrom, L., Bauer, B. A., Lee, M., Ogren, P. V., ...
OBJECTIVE: Medical information is increasingly being presented in a web-enabled format. Medical journals, guidelines, and textbooks are all accessible in a web-based format. It would be desirable to...