A Type II Supernovae Constraint on $\hat{I}{½}_e$-$\hat{I}{½}_s$

Abstract

The role of a resonant $\hat{I}{½}_e$-$\hat{I}{½}_s$ oscillation is discussed in the event of a supernova explosion. It is concluded that a significant $\hat{I}{½}_e$-$\hat{I}{½}_s$ mixing may hinder the ability of the supernova to explode. It may also cool the proto-neutron star too quickly with respect to the observed cooling time of several seconds. The constraints on the $\hat{I}{½}_e$-$\hat{I}{½}_s$ mixing parameters based on the above arguments are calculated.

plain Tex 11 pages, 3 figures available upon request from the authors. ([email protected], sigl@oddjob)