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Strongly interacting dark matter: Self-interactions and keV lines

Boddy, Kimberly K. and Feng, Jonathan L. and Kaplinghat, Manoj and Shadmi, Yael and Tait, Timothy M. P. (2014) Strongly interacting dark matter: Self-interactions and keV lines. Physical Review D, 90 (9). Art. No. 095016. ISSN 2470-0010. doi:10.1103/PhysRevD.90.095016.

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We consider a simple supersymmetric hidden sector: pure SU(N) gauge theory. Dark matter is made up of hidden glueballinos with mass m_X and hidden glueballs with mass near the confinement scale Λ. For m_X ∼ 1 TeV and Λ ∼ 100 MeV, the glueballinos freeze out with the correct relic density and selfinteract through glueball exchange to resolve small-scale structure puzzles. An immediate consequence is that the glueballino spectrum has a hyperfine splitting of order Λ^2 = m_X ∼ 10 keV. We show that the radiative decays of the excited state can explain the observed 3.5 keV x-ray line signal from clusters of galaxies, Andromeda, and the Milky Way.

Item Type:Article
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URLURL TypeDescription Paper
Boddy, Kimberly K.0000-0003-1928-4667
Alternate Title:SIMPle Dark Matter: Self-Interactions and keV Lines
Additional Information:© 2014 American Physical Society. Received 9 September 2014; published 18 November 2014. We are grateful to Geoff Bodwin for helpful correspondence. J. L. F. and Y. S. thank the CERN Theoretical Physics Group and J. L. F. thanks the Technion Particle Physics Center for hospitality. This research is supported in part by BSF Grant No. 2010221 (J. L. F. and Y. S.), NSF Grants No. HY–1316792 (J. L. F. and T. M. P. T.), No. PHY–1214648, and No. PHY–1316792 (M. K.), ISF Grant No. 1367/11 and the ICORE Program of Planning and Budgeting Committee and ISF Grant No. 1937/12 (Y. S.), DOE Grant No. DE-SC0011632 and the Gordon and Betty Moore Foundation through Grant No. 776 (K. B.), a Guggenheim Foundation grant (J. L. F.), and the University of California, Irvine, through a Chancellor’s Fellowship (T.M. P. T.).
Group:Moore Center for Theoretical Cosmology and Physics, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Binational Science Foundation (USA-Israel)2010221
Israel Science Foundation1367/11
ICORE Program of Planning and Budgeting CommitteeUNSPECIFIED
Israel Science Foundation1937/12
Department of Energy (DOE)DE-SC0011632
Gordon and Betty Moore Foundation776
John Simon Guggenheim FoundationUNSPECIFIED
University of California, IrvineUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Issue or Number:9
Classification Code:PACS numbers: 95.35.+d, 12.60.Jv, 95.85.Nv
Record Number:CaltechAUTHORS:20140917-074642072
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49762
Deposited By: Tony Diaz
Deposited On:18 Sep 2014 20:09
Last Modified:10 Nov 2021 18:47

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