ACKERMANN, M.; AJELLO, M.; ALBERT, A.; BALDINI, L.; BARBIELLINI, G.; BASTIERI, D.; BECHTOL, K.; BELLAZZINI, R.; BISSALDI, E.; BLOOM, E.D.; BONINO, R.; BREGEON, J.; BRUEL, P.; BUEHLER, R.; BUSON, S.; CALIANDRO, G.A.; CAMERON, R.A.; CARAGIULO, M.; CARAVEO, P.A.; CECCHI, C.; CHARLES, E.; CHEKHTMAN, A.; CHIANG, J.; CHIARO, G.; CIPRINI, S.; CLAUS, R.; COHEN-TANUGI, Johann; CONRAD, J.; CUOCO, A.; CUTINI, S.; D'AMMANDO, F.; DE ANGELIS, A.; DE PALMA, F.; DERMER, C.D.; DIGEL, S.W.; DRELL, P.S.; DRLICA-WAGNER, A.; FAVUZZI, C.; FERRARA, E.C.; FRANCKOWIAK, A.; FUKAZAWA, Y.; FUNK, S.; FUSCO, P.; GARGANO, F.; GASPARRINI, D.; GIGLIETTO, N.; GIORDANO, F.; GIROLETTI, M.; GODFREY, G.; GUIRIEC, S.; GUSTAFSSON, M.; HEWITT, J.W.; HOU, X.; KAMAE, T.; KUSS, M.; LARSSON, S.; LATRONICO, L.; LONGO, F.; LOPARCO, F.; LOVELLETTE, M.N.; LUBRANO, P.; MALYSHEV, D.; MASSARO, F.; MAYER, M.; MAZZIOTTA, M.N.; MICHELSON, P.F.; MITTHUMSIRI, W.; MIZUNO, T.; MONZANI, M.E.; MORSELLI, A.; MOSKALENKO, I.V.; MURGIA, S.; NEGRO, M.; NEMMEN, R.; NUSS, E.; OHSUGI, T.; ORIENTI, M.; ORLANDO, E.; ORMES, J.F.; PANEQUE, D.; PERKINS, J.S.; PESCE-ROLLINS, M.; PIRON, F.; PIVATO, G.; RAINÒ, S.; RANDO, R.; RAZZANO, M.; REIMER, A.; REIMER, O.; SÁNCHEZ-CONDE, M.; SCHULZ, A.; SGRÒ, C.; SISKIND, E.J.; SPANDRE, G.; SPINELLI, P.; STRONG, A.W.; SUSON, D.J.; TAJIMA, H.; TAKAHASHI, H.; THAYER, J.G.; THAYER, J.B.; TIBALDO, L.; TINIVELLA, M.; TORRES, D.F.; TROJA, E.; UCHIYAMA, Y.; VIANELLO, G.; WERNER, M.; WINER, B.L.; WOOD, K.S.; WOOD, M.; ZAHARIJAS, G.

doi:10.1088/1475-7516/2015/09/008

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

Langue

Article de revue

Ce document a été publié dans

JCAP. 2015, vol. 09, p. 008

Résumé en anglais

We search for evidence of dark matter (DM) annihilation in the isotropic gamma-ray background (IGRB) measured with 50 months of Fermi Large Area Telescope (LAT) observations. An improved theoretical description of the cosmological DM annihilation signal, based on two complementary techniques and assuming generic weakly interacting massive particle (WIMP) properties, renders more precise predictions compared to previous work. More specifically, we estimate the cosmologically-induced gamma-ray intensity to have an uncertainty of a factor ~ 20 in canonical setups. We consistently include both the Galactic and extragalactic signals under the same theoretical framework, and study the impact of the former on the IGRB spectrum derivation. We find no evidence for a DM signal and we set limits on the DM-induced isotropic gamma-ray signal. Our limits are competitive for DM particle masses up to tens of TeV and, indeed, are the strongest limits derived from Fermi LAT data at TeV energies. This is possible thanks to the new Fermi LAT IGRB measurement, which now extends up to an energy of 820 GeV. We quantify uncertainties in detail and show the potential this type of search offers for testing the WIMP paradigm with a complementary and truly cosmological probe of DM particle signals.< Réduire

Mots clés en anglais

gamma ray experiments

dark matter theory

dark matter experiments

dark matter simulations

dark matter: annihilation

GLAST

gamma ray: background

WIMP

gamma ray: galaxy

gamma ray: cosmic radiation

gamma ray: energy spectrum

gamma ray: VHE

WIMP: mass

experimental results: satellite

S030DMA

S046PHB

Métadonnées

Licence d’utilisation du document

Limits on Dark Matter Annihilation Signals from the Fermi LAT 4-year Measurement of the Isotropic Gamma-Ray Background

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche