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Title: Resummed photon spectra for WIMP annihilation

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [4];  [5];  [4];  [6]
  1. Arizona State Univ., Tempe, AZ (United States); Rutgers Univ., Piscataway, NJ (United States). New High Energy Theory Center
  2. Univ. of Oregon, Eugene, OR (United States)
  3. Univ. of California, Berkeley, CA (United States). Berkeley Center for Theoretical Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

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. Here, 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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); California Institute of Technology (CalTech), Pasadena, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC52-06NA25396; AC02-05CH11231; SC0011632; SC0013999; SC0011090; SC0012567
OSTI ID:
1440487
Alternate ID(s):
OSTI ID: 1465447; OSTI ID: 1595841
Report Number(s):
LA-UR-17-31169; CALT-TH-2017-066; MIT-CTP4959; TRN: US1900749
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 3; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (5)

Search for γ -Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S. text January 2018
Testing dark matter with Cherenkov light — prospects of H.E.S.S. and CTA for exploring minimal supersymmetry journal October 2019
Smallest halos in thermal wino dark matter journal December 2019
Electroweak Logarithms in Inclusive Cross Sections text January 2018
TeV-Scale Thermal WIMPs: Unitarity and its Consequences text January 2019

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