Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications

Journal article

Publication Details

Author(s): Ackermann M, Ajello M, Albert A, Allafort A, Baldini L, Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Bissaldi E, Bloom ED, Bonamente E, Bottacini E, Brandt TJ, Bregeon J, Brigida M, Bruel P, Buehler R, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Casandjian JM, Cecchi C, Charles E, Chaves RCG, Chekhtman A, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Conrad J, Cutini S, D'Ammando F, de Angelis A, de Palma F, Dermer CD, Digel SW, Di Venere L, Drell PS, Drlica-Wagner A, Essig R, Favuzzi C, Fegan SJ, Ferrara EC, Focke WB, Franckowiak A, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Germani S, Giglietto N, Giordano F, Giroletti M, Glanzman T, Godfrey G, Gomez-Vargas GA, Grenier IA, Guiriec S, Gustafsson M, Hadasch D, Hayashida M, Hill AB, Horan D, Hou X, Hughes RE, Inoue Y, Izaguirre E, Jogler T, Kamae T, Knoedlseder J, Kuss M, Lande J, Larsson S, Latronico L, Longo F, Loparco F, Lovellette MN, Lubrano P, Malyshev D, Mayer M, Mazziotta MN, McEnery JE, Michelson PF, Mitthumsiri W, Mizuno T, Moiseev AA, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Nemmen R, Nuss E, Ohsugi T, Okumura A, Omodei N, Orienti M, Orlando E, Ormes JF, Paneque D, Perkins JS, Pesce-Rollins M, Piron F, Pivato G, Raino S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Romani RW, Sanchez-Conde M, Schulz A, Sgro C, Siegal-Gaskins J, Siskind EJ, Snyder A, Spandre G, Spinelli P, Suson DJ, Tajima H, Takahashi H, Thayer JG, Thayer JB, Tibaldo L, Tinivella M, Tosti G, Troja E, Uchiyama Y, Usher TL, Vandenbroucke J, Vasileiou V, Vianello G, Vitale V, Winer BL, Wood KS, Wood M, Yang Z, Zaharijas G, Zimmer S
Journal: Physical Review D - Particles, Fields, Gravitation and Cosmology
Publisher: American Physical Society
Publication year: 2013
Volume: 88
ISSN: 1550-7998


Weakly interacting massive particles (WIMPs) are a theoretical class of particles that are excellent dark matter candidates. WIMP annihilation or decay may produce essentially monochromatic gamma rays detectable by the Fermi Large Area Telescope (LAT) against the astrophysical gamma-ray emission of the Galaxy. We have searched for spectral lines in the energy range 5-300 GeV using 3.7 years of data, reprocessed with updated instrument calibrations and an improved energy dispersion model compared to the previous Fermi-LAT Collaboration line searches. We searched in five regions selected to optimize sensitivity to different theoretically motivated dark matter density distributions. We did not find any globally significant lines in our a priori search regions and present 95% confidence limits for annihilation cross sections of self-conjugate WIMPs and decay lifetimes. Our most significant fit occurred at 133 GeV in our smallest search region and had a local significance of 3.3 standard deviations, which translates to a global significance of 1.5 standard deviations. We discuss potential systematic effects in this search, and examine the feature at 133 GeV in detail. We find that the use both of reprocessed data and of additional

FAU Authors / FAU Editors

Funk, Stefan Prof. Dr.
Lehrstuhl für Physik

External institutions with authors

California Institute of Technology (Caltech)
Deutsches Elektronen-Synchrotron DESY
École Polytechnique - Université Paris-Saclay
George Mason University
Hiroshima University
Institut de Ciències de l'Espai (ICE)
Italian Space Agency / Agenzia Spaziale Italiana (ASI)
Leopold-Franzens-Universität Innsbruck / University of Innsbruck
National Aeronautics and Space Administration (NASA)
National Center for Scientific Research / Centre national de la recherche scientifique (CNRS)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN)
NYCB Real-Time Computing, Inc.
Ohio State University
Politecnico di Bari
Purdue University Northwest / Purdue University Calumet
Stanford University
Stockholm University / Stockholms universitet
Université Bordeaux 1, Sciences et Technologies
Université libre de Bruxelles (ULB)
University of California, Berkeley
University of Denver
University of Johannesburg
University of Montpellier / Université Montpellier
University of Padua
University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot
University of Pisa / Università di Pisa (UniPi)
University of Udine / Università degli Studi di Udine
U.S. Naval Research Laboratory

How to cite

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Baldini, L., Barbiellini, G.,... Zimmer, S. (2013). Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications. Physical Review D - Particles, Fields, Gravitation and Cosmology, 88.

Ackermann, M., et al. "Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications." Physical Review D - Particles, Fields, Gravitation and Cosmology 88 (2013).


Last updated on 2019-20-03 at 15:53