Formation Charginos and dark matter from electron-positron annihilation

Abstract EN

Two Charginos (χ ̃^±) and neutralino (χ ̃^o) produced in the Minimal Supersymmetric Standard Model (MSSM) via the process ?−(p1) + e+ (p3)→ χ ̃i (p2) + χ ̃j + (p4) + χ ̃l° (p5) and the cross sections for this interaction calculated by Feynman rules when γ° is the propagator, and χ ̃l0 is a leg from (e-) or from (e+) where i, j = 1, 2, and l = 1, 2, 3, 4.

there are (128) different possible situations.

the cross-sections σ (pb) calculated and graphed as a function of S (GeV) (center of mass energy) based on (MSSM), the mechanisms of Feynman diagram can be detected as : e- (P1-P5 ) + e+ (P3) → γ0 (P2 + P4) → χi- (P2) + χj + (P4) e- (P1) + e+ (P3-p5) → γ0 (P2+P4) → χi- (P2) + χj+ (P4) at S interval (400- 2000) GeV, the best value of σ is (1.18) Pb when χ ̃l0 is a leg from (e-) and masses of Charginos are mχ ̃i- = 700 GeV, mχ ̃j+ = 600 GeV and mχ ̃l0 = 300 GeV