Fermi LAT search for dark matter in gamma-ray lines and the inclusive photon spectrum

Ackermann, M.; Ajello, M.; Albert, A.; Baldini, Luca; Barbiellini, G.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Borgland, A. W.; Brigida, M.; Buehler, R.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caraveo, P. A.; Casandjian, J. M.; Cecchi, C.; Charles, E.; Chekhtman, A.; Chiang, J.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Conrad, J.; D’Ammando, F.; Palma, F. de; Dermer, C. D.; Silva, E. do Couto e; Drell, P. S.; Drlica-Wagner, A.; Edmonds, Y.; Essig, Rouven; Favuzzi, C.; Fegan, S. J.; Focke, W. B.; Fukazawa, Yasushi; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Germani, S.; Giglietto, N.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Guiriec, S.; Gustafsson, M.; Hadasch, D.; Hayashida, M.; Horan, D.; Hughes, R. E.; Kamae, T.; Knödlseder, Jürgen; Kuss, M.; Landé, J.; Lionetto, Andrea; Garde, M. Llena; Longo, F.; Loparco, F.; Lovellette, M. N.; Lubrano, P.; Mazziotta, M. N.; Michelson, P. F.; Mitthumsiri, W.; Mizuno, T.; Моисеев, А. А.; Monte, C.; Monzani, M. E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Naumann-Godó, M.; Norris, J. P.; Nuss, E.; Ohsugi, T.; Okumura, A.; Orlando, E.; Ormes, J. F.; Paneque, D.; Panetta, J.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Porter, T. A.; Prokhorov, Dmitry; Rainò, S.; Rando, R.; Razzano, M.; Reimer, O.; Roth, M.; Sbarra, C.; Scargle, J. D.; Sgrò, C.; Siskind, E. J.; Snyder, A.; Spinelli, P.; Suson, D. J.; Takahashi, H.; Tanaka, Takaaki; Thayer, J. G.; Thayer, J. B.; Tibaldo, L.; Tinivella, M.; Torres, D. F.; Tosti, G.; Troja, E.; Vandenbroucke, J.; Vasileiou, V.; Vianello, G.; Vitale, V.; Waite, A. P.; Winer, B. L.; Wood, K. S.; Yang, Z.; Zimmer, S.

doi:10.1103/physrevd.86.022002

Cited by 242 publications

(309 citation statements)

References 61 publications

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“…Compared to the constraints from 2 years of Fermi -LAT observations of the GC region [66], in the overlapping energy range, our limits are one-two order(s) of magnitude weaker. Also shown is the σ ann v estimate for the γZ explanation of the line-like feature at 130 GeV; the MAGIC upper limit is a factor ∼30 away from this value.…”

Section: Annihilationmentioning

confidence: 89%

“…If the DM particle is a gravitino in R-parity breaking vacua, with τ χ ∼ 10 27 s or larger, it can decay into a photon and a neutralino, producing one monochromatic gamma-ray line at E γ ≃ m χ /2. Searches for features of such origin have been conducted by the Fermi -LAT, in 2 years of observations of the GC region [66], setting lower limits on τ χ of few×10 29 s up to m χ ∼ 600 GeV, whereas, as explained in section 6.2.1, H.E.S.S. observations on the GC Halo are not sensitive for decaying DM searches.…”

Section: Annihilationmentioning

confidence: 99%

“…bounds range between ∼10 −27 cm 3 s −1 at m χ = 500 GeV and ∼10 −26 cm 3 s −1 at m χ = 20 TeV. [66]). Also show is the σannv value corresponding to the 130 GeV gamma-ray line (violet triangle, [64]).…”

Section: Annihilationmentioning

confidence: 99%

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Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC

Aleksić

2016

Springer Theses

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Abstract. We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf galaxy performed so far in the very high energy range of the electromagnetic spectrum. We search this large data sample for signals of dark matter particles in the mass range between 100 GeV and 20 TeV. For this we use the full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral features, like those expected from dark matter annihilation or decay. In particular, we focus our search on gamma-rays produced from different final state Standard Model particles, annihilation with internal bremsstrahlung, monochromatic lines and box-shaped signals. Our results represent the most stringent constraints to the annihilation cross-section or decay lifetime obtained from observations of satellite galaxies, for masses above few hundred GeV. In particular, our strongest limit (95% confidence level) corresponds to a ∼500 GeV dark matter particle annihilating into τ + τ − , and is of order σ ann v ≃ 1.2×10 −24 cm 3 s −1 -a factor ∼40 above the σ ann v thermal value.

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Section: Annihilationmentioning

confidence: 89%

Section: Annihilationmentioning

confidence: 99%

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Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC

Aleksić

2016

Springer Theses

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“…On the contrary, in a paper published immediately after those two, the Fermi-LAT collaboration published an analysis, largely overlapping the same data sample, that excluded at 95% C.L. the presence of any γ-ray line, in the interval 4 ≤ E γ ≤ 200 GeV from a region of 20 × 20 deg 2 around the Galactic Center [16]. The upper limit (UL) to the cross section with 95% CL is shown in Fig.…”

Section: Dark Matter and Astrophysicsmentioning

confidence: 99%

“…Dark Matter 2017 Giulio Auriemma [16] and [17]. The absolute values of the line cross section, as well as the UL, is calculated with a template HM.…”

Section: Pos(multif2017)002mentioning

confidence: 99%