Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
Creators: name: LAT Collaboration
name: Ackermann, M.
name: Ajello, M.
name: Atwood, W. B.
name: Baldini, L.
name: Barbiellini, G.
name: Bastieri, D.
name: Bechtol, K.
name: Bellazzini, R.
name: Blandford, R. D.
name: Bloom, E. D.
name: Bonamente, E.
name: Borgland, A. W.
name: Bottacini, E.
name: Brandt, T. J.
name: Bregeon, J.
name: Brigida, M.
name: Bruel, P.
name: Buehler, R.
name: Buson, S.
name: Caliandro, G. A.
name: Cameron, R. A.
name: Caraveo, P. A.
name: Casandjian, J. M.
name: Cecchi, C.
name: Charles, E.
name: Chekhtman, A.
name: Chiang, J.
name: Ciprini, S.
name: Claus, R.
name: Cohen-Tanugi, J.
name: Conrad, J.
name: Cuoco, A.
name: Cutini, S.
name: D'Ammando, F.
name: de Angelis, A.
name: de Palma, F.
name: Dermer, C. D.
name: Silva, E. do Couto e
name: Drell, P. S.
name: Drlica-Wagner, A.
name: Falletti, L.
name: Favuzzi, C.
name: Fegan, S. J.
name: Focke, W. B.
name: Fukazawa, Y.
name: Funk, S.
name: Fusco, P.
name: Gargano, F.
name: Gasparrini, D.
name: Germani, S.
name: Giglietto, N.
name: Giordano, F.
name: Giroletti, M.
name: Glanzman, T.
name: Godfrey, G.
name: Grenier, I. A.
name: Guiriec, S.
name: Gustafsson, M.
name: Hadasch, D.
name: Hayashida, M.
name: Horan, D.
name: Hughes, R. E.
name: Jackson, M. S.
name: Jogler, T.
name: Jóhannesson, G.
name: Johnson, A. S.
name: Kamae, T.
name: Knödlseder, J.
name: Kuss, M.
name: Lande, J.
name: Latronico, L.
name: Lionetto, A. M.
name: Garde, M. Llena
name: Longo, F.
name: Loparco, F.
name: Lott, B.
name: Lovellette, M. N.
name: Lubrano, P.
name: Mazziotta, M. N.
name: McEnery, J. E.
name: Mehault, J.
name: Michelson, P. F.
name: Mitthumsiri, W.
name: Mizuno, T.
name: Moiseev, A. A.
name: Monte, C.
name: Monzani, M. E.
name: Morselli, A.
name: Moskalenko, I. V.
name: Murgia, S.
name: Naumann-Godo, M.
name: Norris, J. P.
name: Nuss, E.
name: Ohsugi, T.
name: Orienti, M.
name: Orlando, E.
name: Ormes, J. F.
name: Paneque, D.
name: Panetta, J. H.
name: Pesce-Rollins, M.
name: Pierbattista, M.
name: Piron, F.
name: Pivato, G.
name: Poon, H.
name: Rainò, S.
name: Rando, R.
name: Razzano, M.
name: Razzaque, S.
name: Reimer, A.
name: Reimer, O.
name: Romoli, C.
name: Sbarra, C.
name: Scargle, J. D.
name: Sgrò, C.
name: Siskind, E. J.
name: Spandre, G.
name: Spinelli, P.
name: Stawarz, Łukasz
name: Strong, A. W.
name: Suson, D. J.
name: Tajima, H.
name: Takahashi, H.
name: Tanaka, T.
name: Thayer, J. G.
name: Thayer, J. B.
name: Tibaldo, L.
name: Tinivella, M.
name: Tosti, G.
name: Troja, E.
name: Usher, T. L.
name: Vandenbroucke, J.
name: Vasileiou, V.
name: Vianello, G.
name: Vitale, V.
name: Waite, A. P.
name: Wallace, E.
name: Wood, K. S.
name: Wood, M.
name: Yang, Z.
name: Zaharijas, G.
name: Zimmer, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We have performed an analysis of the diffuse gamma-ray emission with the Fermi Large Area Telescope in the Milky Way Halo region searching for a signal from dark matter annihilation or decay. In the absence of a robust dark matter signal, constraints are presented. We consider both gamma rays produced directly in the dark matter annihilation/decay and produced by inverse Compton scattering of the e+e- produced in the annihilation/decay. Conservative limits are derived requiring that the dark matter signal does not exceed the observed diffuse gamma-ray emission. A second set of more stringent limits is derived based on modeling the foreground astrophysical diffuse emission using the GALPROP code. Uncertainties in the height of the diffusive cosmic-ray halo, the distribution of the cosmic-ray sources in the Galaxy, the index of the injection cosmic-ray electron spectrum and the column density of the interstellar gas are taken into account using a profile likelihood formalism, while the parameters governing the cosmic-ray propagation have been derived from fits to local cosmic-ray data. The resulting limits impact the range of particle masses over which dark matter thermal production in the early Universe is possible, and challenge the interpretation of the PAMELA/Fermi-LAT cosmic ray anomalies as annihilation of dark matter.
description: 23 pages, 7 figures, 3 tables. Contact authors: Jan Conrad, Alessandro Cuoco, Zhaoyu Yang, Gabrijela Zaharijas; v2: matches version published on ApJ