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Title: Precision photon spectra for wino annihilation

Abstract

We provide precise predictions for the hard photon spectrum resulting from neutral SU(2)W triplet (wino) dark matter annihilation. Our calculation is performed utilizing an effective field theory expansion around the endpoint region where the photon energy is near the wino mass. This has direct relevance to line searches at indirect detection experiments. We compute the spectrum at next-to-leading logarithmic (NLL) accuracy within the framework established by a factorization formula derived previously by our collaboration. This allows simultaneous resummation of large Sudakov logarithms (arising from a restricted final state) and Sommerfeld effects. Resummation at NLL accuracy shows good convergence of the perturbative series due to the smallness of the electroweak coupling constant — scale variation yields uncertainties on our NLL prediction at the level of 5%. We highlight a number of interesting field theory effects that appear at NLL associated with the presence of electroweak symmetry breaking, which should have more general applicability. We also study the importance of using the full spectrum as compared with a single endpoint bin approximation when computing experimental limits. Our calculation provides a state of the art prediction for the hard photon spectrum that can be easily generalized to other DM candidates, allowing for themore » robust interpretation of data collected by current and future indirect detection experiments.« less

Authors:
 [1];  [2];  [3];  [4];  [3]; ORCiD logo [5];  [6];  [6];  [7]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Univ. of Oregon, Eugene, OR (United States)
  3. Université Paris-Saclay, Gif-sur-Yvette (France)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1530788
Report Number(s):
LA-UR-18-25972
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
89233218CNA000001; SC0000232627; SC0018191; SC0011640; AC02-05CH11231; SC00012567; SC0013999; SCD011090; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; Jets; Phenomenological Models

Citation Formats

Baumgart, Matthew, Cohen, Timothy, Moulin, Emmanuel, Moult, Ian, Rinchiuso, Lucia, Rodd, Nicholas L., Slatyer, Tracy R., Stewart, Iain W., and Vaidya, Varun. Precision photon spectra for wino annihilation. United States: N. p., 2019. Web. doi:10.1007/JHEP01(2019)036.
Baumgart, Matthew, Cohen, Timothy, Moulin, Emmanuel, Moult, Ian, Rinchiuso, Lucia, Rodd, Nicholas L., Slatyer, Tracy R., Stewart, Iain W., & Vaidya, Varun. Precision photon spectra for wino annihilation. United States. doi:10.1007/JHEP01(2019)036.
Baumgart, Matthew, Cohen, Timothy, Moulin, Emmanuel, Moult, Ian, Rinchiuso, Lucia, Rodd, Nicholas L., Slatyer, Tracy R., Stewart, Iain W., and Vaidya, Varun. Fri . "Precision photon spectra for wino annihilation". United States. doi:10.1007/JHEP01(2019)036. https://www.osti.gov/servlets/purl/1530788.
@article{osti_1530788,
title = {Precision photon spectra for wino annihilation},
author = {Baumgart, Matthew and Cohen, Timothy and Moulin, Emmanuel and Moult, Ian and Rinchiuso, Lucia and Rodd, Nicholas L. and Slatyer, Tracy R. and Stewart, Iain W. and Vaidya, Varun},
abstractNote = {We provide precise predictions for the hard photon spectrum resulting from neutral SU(2)W triplet (wino) dark matter annihilation. Our calculation is performed utilizing an effective field theory expansion around the endpoint region where the photon energy is near the wino mass. This has direct relevance to line searches at indirect detection experiments. We compute the spectrum at next-to-leading logarithmic (NLL) accuracy within the framework established by a factorization formula derived previously by our collaboration. This allows simultaneous resummation of large Sudakov logarithms (arising from a restricted final state) and Sommerfeld effects. Resummation at NLL accuracy shows good convergence of the perturbative series due to the smallness of the electroweak coupling constant — scale variation yields uncertainties on our NLL prediction at the level of 5%. We highlight a number of interesting field theory effects that appear at NLL associated with the presence of electroweak symmetry breaking, which should have more general applicability. We also study the importance of using the full spectrum as compared with a single endpoint bin approximation when computing experimental limits. Our calculation provides a state of the art prediction for the hard photon spectrum that can be easily generalized to other DM candidates, allowing for the robust interpretation of data collected by current and future indirect detection experiments.},
doi = {10.1007/JHEP01(2019)036},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2019,
place = {United States},
year = {2019},
month = {1}
}

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