Phys. Rev. Lett. 50, 1419–1422 (1983)Constraint on the Photino Mass from CosmologySee Also: Erratum Received 22 February 1983; published in the issue dated 9 May 1983 A lower bound for the photino mass mγ̃ as a function of the spin-0 fermion superpartner mass mf̃ is derived as an extension of the calculation of Lee and Weinberg. The Majorana nature of the photino induces a p-wave threshold for annihilation γ̃γ̃→ff̅ into light fermions, and leads to a rather unexpected form for the bound: for 25 GeV≲mf̃≲45 GeV, (mγ̃)min≃mτ=1.8 GeV; for mf̃>45 GeV, (mγ̃)min increases approximately linearly with mf̃ to a value of 20 GeV when mf̃=100 GeV. © 1983 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.50.1419
DOI:
10.1103/PhysRevLett.50.1419
PACS:
14.80.Pb, 11.30.Pb, 98.80.Bp
See AlsoErratum: H. Goldberg, Erratum: Constraint on the Photino Mass from Cosmology [Phys. Rev. Lett. 50, 1419 (1983)], Phys. Rev. Lett. 103, 099905 (2009). |
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