Supersymmetric dark matter above the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>W</mi></math></span> mass

Kim Griest; Marc Kamionkowski; Michael S. Turner

doi:10.1103/PhysRevD.41.3565

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Supersymmetric dark matter above the $W$ mass

Kim Griest

Marc Kamionkowski and Michael S. Turner

Center for Particle Astrophysics, University of California, Berkeley, California 94720

Department of Physics and Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433
NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500

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Phys. Rev. D 41, 3565 – Published 15 June, 1990

DOI: https://doi.org/10.1103/PhysRevD.41.3565

Abstract

In this paper we study the cosmological consequences of the minimal supersymmetric extension of the standard model in the case that the neutralino is heavier than the $W$ . We calculate the cross section for annihilation of heavy neutralinos into final states containing gauge and Higgs bosons ( $\tilde{χ} \tilde{χ} \to W W, Z Z, H H, H W, H Z$ ) and combine these results with those previously obtained for annihilation into fermions to find the relic cosmological abundance for the most general neutralino. The new channels are particularly important for Higgsino-like and mixed-state neutralinos, but are subdominant (to the fermion-antifermion annihilation channels) in the case that the neutralino is mostly a gaugino. The effect of the top-quark mass is also considered. Using these cross sections and the cosmological constraint $Ω_{\tilde{χ}} h^{2} ≲ 1$ we map the entire range of cosmologically acceptable supersymmetric parameter space and find a very general bound on the neutralino mass. For a top-quark mass of less than 180 GeV, neutralinos heavier than 3200 GeV are cosmologically inconsistent, and if the top-quark mass is less than 120 GeV, the bound is lowered to 2600 GeV. We find that a "heavy" neutralino ( $m_{\tilde{χ}} > m_{W}$ ) that contributes $Ω_{\tilde{χ}} \sim 1$ arises for a very wide range of model parameters and makes, therefore, a very natural and attractive dark-matter candidate.

References (22)

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[2]
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[1]
J. F. Gunion and H. E. Haber, Nucl. Phys. B272, 1 (1986)
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[c1] H. E. Haber and G. L. Kane, Phys. Rep. 117, 75 (1985)

[c2] V. Trimble, Annu. Rev. Astron. Astrophys. 25, 425 (1989) J. R. Primack, B. Sadoulet, and D. Seckel, Annu. Rev. Nucl. Part. Sci. B38, 751 (1988) in Dark Matter in the Universe, proceedings of the IAU Symposium, Princeton, New Jersey, 1985, edited by J. Kormendy and G. Knapp (IAU Symposium No. 117) (Reidel, Dordrecht, 1987)

[c3] [2]

[c4] J. Ellis, J. S. Hagelin, D. V. Nanopoulos, K. A. Olive, and M. Srednicki, Nucl. Phys. B238, 453 (1984)

[c5] K. Griest, Phys. Rev. D 38, 2357 (1988) Fermilab Report No. FERMILAB-Pub-89/139-A(E), 1989 (unpublished) Phys. Rev. Lett. 61, 666 (1988)

[c6] K. A. Olive and M. Srednicki, Phys. Lett. B 230, 78 (1989)

[c7] K. Enqvist, K. Kainulainen, and J. Maalampi, Nucl. Phys. B317, 647 (1989)

[c8] R. A. Barbieri and G. F. Giudice, Nucl. Phys. B306, 63 (1988)

[c9] [1]

[c10] J. F. Gunion and H. E. Haber, Nucl. Phys. B272, 1 (1986)

[c11] J. F. Gunion and H. E. Haber, Nucl. Phys. B278, 449 (1986)

[c12] K. Griest and M. Kamionkowski (unpublished)

[c13] H. Goldberg, Phys. Rev. Lett. 50, 1419 (1983)

[c14] L. Bergstrom, Phys. Lett. B 225, 372 (1983) R. Flores, K. A. Olive, and S. Rudaz, ibid. 232, 377 (1989)

[c15] Eq. (C38) of [1] Eq. (4.53) of [10] [6]

[c16] E. W. Kolb and M. S. Turner, The Early Universe (Addison-Wesley, Redwood City, CA, 1989)

[c17] CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 64, 142 (1990)

[c18] U. Amaldi et al., Phys. Rev. D 36, 1385 (1987) B. W. Lynn, M. E. Peskin, and R. G. Stewart, in Physics at LEP, LEP Jamboree, Geneva, Switzerland, 1985 edited by J. Ellis and R. Peccei (CERN Yellow Report No. 86-02, Geneva, 1986)

[c19] G. F. Giudice and G. Ridolfi, Z. Phys. C 41, 447 (1988)

[c20] Primack et al. in [2]

[c21] K. Griest and B. Sadoulet, in Dark Matter in the Universe, proceedings of the Second Particle Astrophysics School on Dark Matter, Erice, Italy, 1988, edited by P. Galeotti and D. N. Schramm (Kluwer Academic, Netherlands, 1989)

[c22] R. M. Barnett and H. E. Haber, Phys. Rev. D 31, 85 (1985)

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Supersymmetric dark matter above the $W$ mass

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Supersymmetric dark matter above the W mass

Abstract

References (22)

Supersymmetric dark matter above the $W$ mass