Unparticle effects on plasmon production from electron-positron annihilation in SN 1987A

Abstract

The unparticle effects on plasmon production at the e⁺ e⁻ collider in SN 1987A are investigated. We have calculated the energy loss and the cross-section of this process for different values of the scaling parameter d_U​. By assuming the supernovae cooling rate ≤ 7.288×10⁻²⁷ GeV, we find the lower bound on the scale Λ_U​ = 32.849 TeV, 11.655 TeV, 5.084 TeV, 2.770 TeV corresponding to d_U ​=1.6,1.7,1.8,1.9 and Λ_U​ = 0.675 TeV, 0.309 TeV, 0.168 TeV, 0.101 TeV corresponding to d_U​ = 2.1,2.2,2.3,2.4.

In addition, we have shown that in the range ​ =1 TeV – 13 TeV the cross-section varies from 4.663×10⁻²⁰ barn to 6.206×10⁻³ barn. So, we hope that the cross-section gives possible experimental signatures for unparticle.