Baumgart, Matthew and Cohen, Timothy and Moult, Ian and Rodd, Nicholas L. and Slatyer, Tracy R. and Solon, Mikhail P. and Stewart, Iain W. and Vaidya, Varun
(2018)
*Resummed Photon Spectra for WIMP Annihilation.*
Journal of High Energy Physics, 2018
(3).
Art. No. 117.
ISSN 1126-6708.
https://resolver.caltech.edu/CaltechAUTHORS:20180109-162306303

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## Abstract

We construct an effective field theory (EFT) description of the hard photon spectrum for heavy WIMP annihilation. This facilitates precision predictions relevant for line searches, and allows the incorporation of non-trivial energy resolution effects. Our framework combines techniques from non-relativistic EFTs and soft-collinear effective theory (SCET), as well as its multi-scale extensions that have been recently introduced for studying jet substructure. We find a number of interesting features, including the simultaneous presence of SCETI and SCETII modes, as well as collinear-soft modes at the electroweak scale. We derive a factorization formula that enables both the resummation of the leading large Sudakov double logarithms that appear in the perturbative spectrum, and the inclusion of Sommerfeld enhancement effects. Consistency of this factorization is demonstrated to leading logarithmic order through explicit calculation. Our final result contains both the exclusive and the inclusive limits, thereby providing a unifying description of these two previously-considered approximations. We estimate the impact on experimental sensitivity, focusing for concreteness on an SU(2) W triplet fermion dark matter — the pure wino — where the strongest constraints are due to a search for gamma-ray lines from the Galactic Center. We find numerically significant corrections compared to previous results, thereby highlighting the importance of accounting for the photon spectrum when interpreting data from current and future indirect detection experiments.

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Additional Information: | © 2018 The Author(s). This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. Received: January 11, 2018; Accepted: March 13, 2018; Published: March 20, 2018. We thank Martin Bauer, Marco Cirelli, Richard Hill, Emmanuel Moulin, Duff Neill, and Lucia Rinchiuso for useful discussions. MB is supported by the U.S. Department of Energy, under grant number DE-SC0003883. TC is supported by the U.S. Department of Energy, under grant number DE-SC0018191. IM is supported by the U.S. Department of Energy, under grant number DE-AC02-05CH11231 and the LBNL LDRD program. NLR and TRS are supported by the U.S. Department of Energy, under grant numbers DE-SC00012567 and DE-SC0013999. MPS is supported by the U.S. Department of Energy, under grant number DE-SC0011632. IWS is supported by the Office of Nuclear Physics of the U.S. Department of Energy under the Grant No. DE-SCD011090 and by the Simons Foundation through the Investigator grant 327942. VV was supported by the Office of Nuclear Physics of the U.S. Department of Energy under the Grant No. Contract DE-AC52-06NA25396 and through the LANL LDRD Program. | ||||||||||||||||||||||||

Group: | Walter Burke Institute for Theoretical Physics | ||||||||||||||||||||||||

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Subject Keywords: | Jets; Phenomenological Models | ||||||||||||||||||||||||

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Issue or Number: | 3 | ||||||||||||||||||||||||

Record Number: | CaltechAUTHORS:20180109-162306303 | ||||||||||||||||||||||||

Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180109-162306303 | ||||||||||||||||||||||||

Official Citation: | Baumgart, M., Cohen, T., Moult, I. et al. J. High Energ. Phys. (2018) 2018: 117. https://doi.org/10.1007/JHEP03(2018)117 | ||||||||||||||||||||||||

Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||

ID Code: | 84214 | ||||||||||||||||||||||||

Collection: | CaltechAUTHORS | ||||||||||||||||||||||||

Deposited By: | Joy Painter | ||||||||||||||||||||||||

Deposited On: | 10 Jan 2018 00:34 | ||||||||||||||||||||||||

Last Modified: | 03 Oct 2019 19:15 |

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