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Title: Soft collinear effective theory for heavy WIMP annihilation

Abstract

In a large class of models for Weakly Interacting Massive Particles (WIMPs), the WIMP mass M lies far above the weak scale mW . This work identifies universal Sudakov-type logarithms ~ α log2(2 M/mW) that spoil the naive convergence of perturbation theory for annihilation processes. An effective field theory (EFT) framework is presented, allowing the systematic resummation of these logarithms. Another impact of the large separation of scales is that a long-distance wavefunction distortion from electroweak boson exchange leads to observable modifications of the cross section. Careful accounting of momentum regions in the EFT allows the rigorous disentanglement of this so-called Sommerfeld enhancement from the short-distance hard annihilation process. In addition, the WIMP is described as a heavy-particle field, while the electroweak gauge bosons are treated as soft and collinear fields. Hard matching coefficients are computed at renormalization scale μ ~ 2 M , then evolved down to μ ~ mW , where electroweak symmetry breaking is incorporated and the matching onto the relevant quantum mechanical Hamiltonian is performed. The example of an SU(2)W triplet scalar dark matter candidate annihilating to line photons is used for concreteness, allowing the numerical exploration of the impact of next-to-leading order corrections and logmore » resummation. As a result, for M ≃ 3 TeV, the resummed Sommerfeld enhanced cross section is reduced by a factor of ~ 3 with respect to the treelevel fixed order result.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Princeton Univ., Princeton, NJ (United States); Institute for Advanced Study, Princeton, NJ (United States); Univ. of Oregon, Eugene, OR (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Univ. of Chicago, Chicago, IL (United States)
  4. Univ. of Chicago, Chicago, IL (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1226293
Report Number(s):
FERMILAB-PUB-14-359-T; EFI-14-32; SLAC-PUB-16094
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1409.7392; TRN: US1500550
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2015; 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; Beyond Standard Model; Cosmology of Theories; beyond the SM; resummation; Effective field theories

Citation Formats

Bauer, Martin, Cohen, Timothy, Hill, Richard J., and Solon, Mikhail P. Soft collinear effective theory for heavy WIMP annihilation. United States: N. p., 2015. Web. doi:10.1007/JHEP01(2015)099.
Bauer, Martin, Cohen, Timothy, Hill, Richard J., & Solon, Mikhail P. Soft collinear effective theory for heavy WIMP annihilation. United States. https://doi.org/10.1007/JHEP01(2015)099
Bauer, Martin, Cohen, Timothy, Hill, Richard J., and Solon, Mikhail P. 2015. "Soft collinear effective theory for heavy WIMP annihilation". United States. https://doi.org/10.1007/JHEP01(2015)099. https://www.osti.gov/servlets/purl/1226293.
@article{osti_1226293,
title = {Soft collinear effective theory for heavy WIMP annihilation},
author = {Bauer, Martin and Cohen, Timothy and Hill, Richard J. and Solon, Mikhail P.},
abstractNote = {In a large class of models for Weakly Interacting Massive Particles (WIMPs), the WIMP mass M lies far above the weak scale mW . This work identifies universal Sudakov-type logarithms ~ α log2(2 M/mW) that spoil the naive convergence of perturbation theory for annihilation processes. An effective field theory (EFT) framework is presented, allowing the systematic resummation of these logarithms. Another impact of the large separation of scales is that a long-distance wavefunction distortion from electroweak boson exchange leads to observable modifications of the cross section. Careful accounting of momentum regions in the EFT allows the rigorous disentanglement of this so-called Sommerfeld enhancement from the short-distance hard annihilation process. In addition, the WIMP is described as a heavy-particle field, while the electroweak gauge bosons are treated as soft and collinear fields. Hard matching coefficients are computed at renormalization scale μ ~ 2 M , then evolved down to μ ~ mW , where electroweak symmetry breaking is incorporated and the matching onto the relevant quantum mechanical Hamiltonian is performed. The example of an SU(2)W triplet scalar dark matter candidate annihilating to line photons is used for concreteness, allowing the numerical exploration of the impact of next-to-leading order corrections and log resummation. As a result, for M ≃ 3 TeV, the resummed Sommerfeld enhanced cross section is reduced by a factor of ~ 3 with respect to the treelevel fixed order result.},
doi = {10.1007/JHEP01(2015)099},
url = {https://www.osti.gov/biblio/1226293}, journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 1,
volume = 2015,
place = {United States},
year = {Mon Jan 19 00:00:00 EST 2015},
month = {Mon Jan 19 00:00:00 EST 2015}
}

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Works referencing / citing this record:

Electroweak Logarithms in Inclusive Cross Sections
text, January 2018


Resummed Photon Spectra for WIMP Annihilation
text, January 2017


Towards the Final Word on Neutralino Dark Matter
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Zero-range effective field theory for resonant wino dark matter. Part III. Annihilation effects
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Testing dark matter with Cherenkov light — prospects of H.E.S.S. and CTA for exploring minimal supersymmetry
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