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1. Indirect detection of WIMPs

Author

J. Edsjö

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, Massive particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Lightest Supersymmetric Particle, Atomic and Molecular Physics, and Optics, WIMP, Weakly interacting massive particles, Neutralino, High Energy Physics::Experiment, Neutrino, Light dark matter
Abstract

There is compelling evidence for the existence of dark matter in the Universe. One of the favourite candidates is a Weakly Interacting Massive Particle (WIMP). We will here focus on indirect ways to search for WIMPs and compare their advantages and disadvantages, the emphasis though will be on searches via neutrinos from the Earth/Sun. As a concrete WIMP example, we will focus on the neutralino that arises in supersymmetric extensions of the standard model.

Published
2005
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2. Les Houches 2011: Physics at TeV Colliders New Phys

Author

G. Brooijmans, B. Gripaios, F. Moortgat, J. Santiago, P. Skands, D. Albornoz Vásquez, B. C. Allanach, A. Alloul, A. Arbey, A. Azatov, H. Baer, C. Balázs, A. Barr, L. Basso, M. Battaglia, P. Bechtle, G. Bélanger, A. Belyaev, K. Benslama, L. Bergström, A. Bharucha, C. Boehm, M. Bondarenko, O. Bondu, E. Boos, F. Boudjema, T. Bringmann, M. Brown, V. Bunichev, S. Calvet, M. Campanelli, A. Carmona, D. G. Cerdeño, M. Chala, R. S. Chivukula, D. Chowdhury, N. D. Christensen, M. Cirelli, S. Cox, K. Cranmer, J. Da Silva, T. Delahaye, A. De Roeck, A. Djouadi, E. Dobson, M. Dolan, F. Donato, G. Drieu La Rochelle, G. Duda, C. Duhr, B. Dumont, J. Edsjö, J. Ellis, C. Evoli, A. Falkowski, M. Felcini, B. Fuks, D. Gaggero, S. Gascon Shotkin, D. K. Ghosh, A. Giammanco, E. Gabrielli, GABRIELLI, Emidio, G. Brooijmans, et. al., G., Brooijman, B., Gripaio, F., Moortgat, J., Santiago, P., Skand, D., Albornoz Vásquez, B. C., Allanach, A., Alloul, A., Arbey, A., Azatov, H., Baer, C., Baláz, A., Barr, L., Basso, M., Battaglia, P., Bechtle, G., Bélanger, A., Belyaev, K., Benslama, L., Bergström, A., Bharucha, C., Boehm, M., Bondarenko, O., Bondu, E., Boo, F., Boudjema, T., Bringmann, M., Brown, V., Bunichev, S., Calvet, M., Campanelli, A., Carmona, D. G., Cerdeño, M., Chala, R. S., Chivukula, D., Chowdhury, N. D., Christensen, M., Cirelli, S., Cox, K., Cranmer, J., Da Silva, T., Delahaye, A., De Roeck, A., Djouadi, E., Dobson, M., Dolan, F., Donato, G., Drieu La Rochelle, G., Duda, C., Duhr, B., Dumont, J., Edsjö, J., Elli, C., Evoli, A., Falkowski, M., Felcini, B., Fuk, Gabrielli, Emidio, D., Gaggero, S., Gascon Shotkin, D. K., Ghosh, A., Giammanco, and E., Gabrielli

Subjects
LARGE HADRON COLLIDER
Abstract

We present the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 30 May-17 June, 2011). Our report includes new agreements on formats for interfaces between computational tools, new tool developments, important signatures for searches at the LHC, recommendations for presentation of LHC search results, as well as additional phenomenological studies.

Published
2012

3. The AMANDA neutrino telescope

Author

E.C. Andrés, P. Askebjer, S.W. Barwick, R.C. Bay, L. Bergström, A. Biron, J. Booth, O. Botner, A. Bouchta, S. Carius, M. Carlson, W. Chinowsky, D. Chirkin, J. Conrad, C.G.S. Costa, D. Cowen, E. Dalberg, T. DeYoung, J. Edsjö, P. Ekström, A. Goobar, L. Gray, A. Hallgren, F. Halzen, R. Hardtke, S. Hart, Y. He, C.P. de los Heros, G. Hill, P.O. Hulth, S. Hundertmark, J. Jacobsen, A. Jones, V. Kandhadai, A. Karle, J. Kim, H. Leich, M. Leuthold, P. Lindahl, I. Liubarsky, P. Loaiza, D. Lowder, P. Marciniewski, T.C. Miller, P. Miocinovic, P.C. Mock, R. Morse, M. Newcomer, P. Niessen, D. Nygren, R. Porrata, D. Potter, P.B. Price, G. Przybylski, W. Rhode, S. Richter, J. Rodriguez, P. Romenesko, D. Ross, H. Rubinstein, T. Schmidt, E. Schneider, R. Schwarz, U. Schwendicke, G. Smoot, M. Solarz, V. Sorin, C. Spiering, P. Steffen, R. Stokstad, O. Streicher, I. Taboada, T. Thon, S. Tilav, C. Walck, C.H. Wiebusch, R. Wischnewski, K. Woschnagg, W. Wu, G. Yodh, and S. Young

Subjects
Particle physics, High energy, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Neutrino telescope, FOS: Physical sciences, Astrophysics, Particle detector, High Energy Physics - Experiment, law.invention, Telescope, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), law, Physics, Muon, Astrophysics (astro-ph), High Energy Physics::Phenomenology, Detector, Astronomy, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, High Energy Physics - Phenomenology, Early results, Space and Planetary Science, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino
Abstract

With an effective telescope area of order $10^4$ m$^2$ for TeV neutrinos, a threshold near $\sim$50 GeV and a pointing accuracy of 2.5 degrees per muon track, the AMANDA detector represents the first of a new generation of high energy neutrino telescopes, reaching a scale envisaged over 25 years ago. We describe early results on the calibration of natural deep ice as a particle detector as well as on AMANDA's performance as a neutrino telescope., Comment: 12 pages, Latex2.09, uses espcrc2.sty and epsf.sty, 13 postscript files included. Talk presented at the 18th International Conference on Neutrino Physics and Astrophysics (Neutrino 98), Takayama, Japan, June 1998

Published
1998
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4. SUSY tools

Author

F. Boudjema, J. Edsjö, and P. Gondolo

Subjects
Physics, Particle physics, WIMP, Dark matter, Particle, Supersymmetry, Cosmology
Published
2010
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5. INDIRECT DETECTION OF NEUTRALINOS

Author

J. Edsjö

Subjects
Physics, Particle physics, Weakly interacting massive particles, Warm dark matter, Strongly interacting massive particle, Lightest Supersymmetric Particle, Light dark matter
Published
2005
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6. WIMP SEARCHES WITH AMANDA-B10

Author

C. Pérez de los Heros, T. C. Miller, K. Rawlins, D. Bertrand, A. Chen, T. Neunhöffer, Stefan Richter, J. Edsjö, T. Scheider, James Madsen, Timothy W. Schmidt, P. B. Price, James Kim, Ariel Goobar, M. M. Boyce, J. Ludvig, H. G. Sander, A. Silvestri, R. C. Bay, W. Wu, P. Ekström, G. Barouch, C. H. Wiebusch, Glenn Spiczak, Wolfgang Rhode, P. Loaiza, J. P Dewulf, S. Hundertmark, D. F. Cowen, D. M. Lowder, R. Hardtke, Dmitry Chirkin, N. Starinsky, Y. Minaeva, H. Leich, P. Steffen, Hakki Ögelman, A. Goldschmidt, Staffan Carius, P. Niessen, R. Schwarz, Tyce DeYoung, Joakim Edsjö, M. Kowalski, J. Rodriguez Martino, M. Hellwig, D. Steele, X. Bai, K.-H. Becker, Kael Hanson, L. Köpke, I. Taboada, Ch. Weinheimer, A. Biron, A. Karle, Steven W. Barwick, M. Solarz, Paolo Desiati, G. Smoot, C. Spiering, Lars Bergström, B. Koci, R. Morse, K. Woschnagg, Matthias Leuthold, G. C. Hlll, D. Ross, Olga Botner, D. R. Nygren, Jan Conrad, T. Feser, C. Walck, G. B. Yodh, P. O. Hulth, Jodi Cooley, S. Young, M. Gaug, M. Vander Donckt, Caroline Costa, P. Doksus, Pawel Marciniewski, Janet Jacobsen, H. S. Matis, H. Rubinstein, Adam Bouchta, Francis Halzen, Allan Hallgren, R. G. Stokstad, R. Wischnewski, Ole Streicher, J. I. Lamoureux, E. Dalberg, P. Romenesko, J. Dailing, P. Lindahl, Donald P. Schneider, and P. Miocinovic

Subjects
Astroparticle physics, Physics, Nuclear physics, Particle physics, WIMP, Weakly interacting massive particles
Published
2001
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7. Results from the AMANDA High Energy Neutrino Detector

Author

E. Andres, P. Askebjer, X. Bai, G. Barouch, S.W. Barwick, R.C. Bay, K.-H. Becker, L. Bergström, D. Bertrand, A. Biron, J. Booth, O. Botner, A. Bouchta, M.M. Boyce, S. Carius, D. Chirkin, J. Conrad, C.G.S. Costa, D.F. Cowen, J. Dailing, E. Dalberg, T. DeYoung, P. Desiati, J.-P. Dewulf, P. Doksus, J. Edsjö, P. Ekström, B. Erlandsson, T. Feser, M. Gaug, A. Goldschmidt, A. Goobar, H. Haase, A. Hallgren, F. Halzen, K. Hanson, R. Hardtke, Y.D. He, M. Hellwig, H. Heukenkamp, G.C. Hill, P.O. Hulth, S. Hundertmark, J. Jacobsen, A. Karle, J. Kim, B. Koci, L. Köpke, M. Kowalski, H. Leich, M. Leuthold, P. Lindahl, I. Liubarsky, P. Loaiza, D.M. Lowder, J. Ludvig, J. Madsen, P. Marciniewski, H. Matis, T. Mikolajski, T.C. Miller, Y. Minaeva, P. Miocinovic, P. Mock, R. Morse, T. Neunhöffer, F.M. Newcomer, P. Niessen, D.R. Nygren, C. Pérez de los Heros, R. Porrata, P.B. Price, K. Rawlins, C. Reed, W. Rhode, A. Richards, S. Richter, J. Rodriguez Martino, P. Romenesko, D. Ross, H. Rubinstein, H.-G. Sander, T. Scheider, T. Schmidt, D. Schneider, E. Schneider, R. Schwarz, A. Silvestri, M. Solarz, G. Spiczak, C. Spiering, N. Starinski, D. Steele, P. Steffen, R.G. Stokstad, O. Streicher, Q. Sun, I. Taboada, L. Thollander, T. Thon, S. Tilav, M. Vander Donckt, C. Walck, C. Weinheimer, C.H. Wiebusch, R. Wischnewski, K. Woschnagg, W. Wu, G. Yodh, and S. Young

Subjects
Physics, Nuclear and High Energy Physics, Point source, Physics::Instrumentation and Detectors, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics (astro-ph), FOS: Physical sciences, Cosmic ray, Astrophysics, Atomic and Molecular Physics, and Optics, Air shower, Neutrino detector, Sky, Angular resolution, High Energy Physics::Experiment, Neutrino, media_common
Abstract

This paper briefly summarizes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector. The complete data set from 1997 was analyzed. For E_mu>10 TeV, the detector exceeds 10,000 m^2 in effective area between declinations of 25 and 90 degrees. Neutrinos generated in the atmosphere by cosmic ray interactions were used to verify the overall sensitivity of the detector. The absolute pointing accuracy and angular resolution has been confirmed by the analysis of coincident events between the SPASE air shower array and the AMANDA detector. Preliminary flux limits from point source candidates are presented. For declinations larger than +45 degrees, our results compare favorably to existing limits for sources in the Southern sky. We also present the current status of the searches for high energy neutrino emission from diffusely distributed sources, GRBs, and WIMPs from the center of the earth., 8 pages, 9 figures, submitted to Int. Conf. Neut. Phys. Astro. (Neutrino 2000)

Published
2000
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8. Status of the scalar singlet dark matter model.

Author

Athron P, Balázs C, Bringmann T, Buckley A, Chrząszcz M, Conrad J, Cornell JM, Dal LA, Edsjö J, Farmer B, Jackson P, Kahlhoefer F, Krislock A, Kvellestad A, McKay J, Mahmoudi F, Martinez GD, Putze A, Raklev A, Rogan C, Saavedra A, Savage C, Scott P, Serra N, Weniger C, and White M

Abstract

One of the simplest viable models for dark matter is an additional neutral scalar, stabilised by a Z 2 symmetry. Using the GAMBIT package and combining results from four independent samplers, we present Bayesian and frequentist global fits of this model. We vary the singlet mass and coupling along with 13 nuisance parameters, including nuclear uncertainties relevant for direct detection, the local dark matter density, and selected quark masses and couplings. We include the dark matter relic density measured by Planck , direct searches with LUX, PandaX, SuperCDMS and XENON100, limits on invisible Higgs decays from the Large Hadron Collider, searches for high-energy neutrinos from dark matter annihilation in the Sun with IceCube, and searches for gamma rays from annihilation in dwarf galaxies with the Fermi -LAT. Viable solutions remain at couplings of order unity, for singlet masses between the Higgs mass and about 300 GeV, and at masses above ∼ 1 TeV. Only in the latter case can the scalar singlet constitute all of dark matter. Frequentist analysis shows that the low-mass resonance region, where the singlet is about half the mass of the Higgs, can also account for all of dark matter, and remains viable. However, Bayesian considerations show this region to be rather fine-tuned., (© The Author(s) 2017.)

Published
2017
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9. Dark matter interpretation of recent electron and positron data.

Author

Bergström L, Edsjö J, and Zaharijas G

Abstract

We analyze the recently released Fermi-LAT data on the sum of electrons and positrons. Compared to a conventional, pre-Fermi, background model, a surprising excess in the several hundred GeV range is found and here we analyze it in terms of dark matter models. We also compare with newly published results from PAMELA and H.E.S.S., and find models giving very good fits to these data sets as well. If this dark matter interpretation is correct, we also predict the possibility of a sharp break in the diffuse gamma-ray spectrum coming from final state radiation.

Published
2009
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10. Significant gamma lines from inert Higgs dark matter.

Author

Gustafsson M, Lundström E, Bergström L, and Edsjö J

Abstract

One way to unambiguously confirm the existence of particle dark matter and determine its mass would be to detect its annihilation into monochromatic gamma-rays in upcoming telescopes. One of the most minimal models for dark matter is the inert doublet model, obtained by adding another Higgs doublet with no direct coupling to fermions. For a mass between 40 and 80 GeV, the lightest of the new inert Higgs particles can give the correct cosmic abundance of cold dark matter in agreement with current observations. We show that for this scalar dark matter candidate, the annihilation signal of monochromatic gammagamma and Zgamma final states would be exceptionally strong. The energy range and rates for these gamma-ray line signals make them ideal to search for with the soon upcoming GLAST satellite.

Published
2007
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11. Spectral gamma-ray signatures of cosmological dark matter annihilations.

Author

Bergström L, Edsjö J, and Ullio P

Abstract

We propose a new signature for weakly interacting massive particle (WIMP) dark matter, a spectral feature in the diffuse extragalactic gamma-ray radiation. This feature, a sudden drop of the gamma-ray intensity at an energy corresponding to the WIMP mass, comes from the asymmetric distortion of the line due to WIMP annihilation into two gamma rays caused by the cosmological redshift. Unlike other proposed searches for a line signal, this method is not very sensitive to the exact dark matter density distribution in halos and subhalos.

Published
2001
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12. Observation of high-energy neutrinos using Cerenkov detectors embedded deep in Antarctic ice.

Author

Andrés E, Askebjer P, Bai X, Barouch G, Barwick SW, Bay RC, Becker KH, Bergström L, Bertrand D, Bierenbaum D, Biron A, Booth J, Botner O, Bouchta A, Boyce MM, Carius S, Chen A, Chirkin D, Conrad J, Cooley J, Costa CG, Cowen DF, Dailing J, Dalberg E, DeYoung T, Desiati P, Dewulf JP, Doksus P, Edsjö J, Ekström P, Erlandsson B, Feser T, Gaug M, Goldschmidt A, Goobar A, Gray L, Haase H, Hallgren A, Halzen F, Hanson K, Hardtke R, He YD, Hellwig M, Heukenkamp H, Hill GC, Hulth PO, Hundertmark S, Jacobsen J, Kandhadai V, Karle A, Kim J, Koci B, Köpke L, Kowalski M, Leich H, Leuthold M, Lindahl P, Liubarsky I, Loaiza P, Lowder DM, Ludvig J, Madsen J, Marciniewski P, Matis HS, Mihalyi A, Mikolajski T, Miller TC, Minaeva Y, Miocinović P, Mock PC, Morse R, Neunhöffer T, Newcomer FM, Niessen P, Nygren DR, Ogelman H, Pérez de los Heros C, Porrata R, Price PB, Rawlins K, Reed C, Rhode W, Richards A, Richter S, Martino JR, Romenesko P, Ross D, Rubinstein H, Sander HG, Scheider T, Schmidt T, Schneider D, Schneider E, Schwarz R, Silvestri A, Solarz M, Spiczak GM, Spiering C, Starinsky N, Steele D, Steffen P, Stokstad RG, Streicher O, Sun Q, Taboada I, Thollander L, Thon T, Tilav S, Usechak N, Vander Donckt M, Walck C, Weinheimer C, Wiebusch CH, Wischnewski R, Wissing H, Woschnagg K, Wu W, Yodh G, and Young S

Abstract

Neutrinos are elementary particles that carry no electric charge and have little mass. As they interact only weakly with other particles, they can penetrate enormous amounts of matter, and therefore have the potential to directly convey astrophysical information from the edge of the Universe and from deep inside the most cataclysmic high-energy regions. The neutrino's great penetrating power, however, also makes this particle difficult to detect. Underground detectors have observed low-energy neutrinos from the Sun and a nearby supernova, as well as neutrinos generated in the Earth's atmosphere. But the very low fluxes of high-energy neutrinos from cosmic sources can be observed only by much larger, expandable detectors in, for example, deep water or ice. Here we report the detection of upwardly propagating atmospheric neutrinos by the ice-based Antarctic muon and neutrino detector array (AMANDA). These results establish a technology with which to build a kilometre-scale neutrino observatory necessary for astrophysical observations.

Published
2001
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