Bound on the flux of magnetic monopoles from catalysis of nucleon decay in white dwarfs
Journal Article
·
· Physical Review, D
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120 (United States)
Catalysis of nucleon decay in white dwarfs is used to constrain the abundance of magnetic monopoles arising from grand unified theories. Recent discoveries of the dimmest white dwarf ever observed, WD 1136-286 with L=10{sup {minus}4.94}L{sub {circle_dot}}, place limits on the monopole flux that are two orders of magnitude stronger than previous bounds from white dwarfs. An abundance of monopoles greater than the new bound would heat this star to a luminosity higher than what is observed. The new bound is (F/cm{sup {minus}2} s{sup {minus}1} sr{sup {minus}1}) ({sigma}{upsilon}/10{sup {minus}28} cm{sup 2}){lt}1.3{times}10{sup {minus}20}({upsilon}{sub M}/10{sup {minus}3}c){sup 2}, where {upsilon}{sub M} is the monopole velocity in the Galaxy. The limit is improved by including the monopoles captured by the main-sequence progenitor of the white dwarf: (F/cm{sup {minus}2} s{sup {minus}1} sr{sup {minus}1}) ({sigma}{upsilon}/10{sup {minus}28} cm{sup 2}){lt}3.5(26){times}10{sup {minus}21} for 10{sup 17} (10{sup 16}) GeV monopoles. We also note that the dependence on monopole mass of flux bounds due to catalysis in neutron stars with main sequence accretion has previously been calculated incorrectly [previously the bound has been stated as F({sigma}{upsilon}/10{sup {minus}28} cm{sup 2}){lt}10{sup {minus}28} cm{sup {minus}2} s{sup {minus}1} sr{sup {minus}1}]. We show that the correct bounds are somewhat weaker for monopole mass other than 10{sup 17} GeV. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 324932
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 6 Vol. 59; ISSN 0556-2821; ISSN PRVDAQ
- Country of Publication:
- United States
- Language:
- English
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