我們探討光子光子對撞機在 stau-neutralino coannihilation 區域且在mSUGRA 模型的情況.最有可能的超對稱訊號是 stau且在 stau和neutralino 的質量差5~15GeV.標準模型所產生的主要背景訊號為 W 玻色子.我們提出一系列的刪除背景訊號的方法,以降低背景訊號

We probe the stau-neutralino coannihilation region of the parameter space within the framework of minimal SUGRA models at a photon-photon collider. The most favorable signals of SUSY is stau-pair production where the small mass difference between the stau and neutralino the in the coannihilation region is 5~15GeV.The standard model background is dominated by W-pair production. We propose a series of cuts which reduce this background.

[1] Zhiqing ZHANG,hep-ph/0411035
[2] D.N Spergel et al.,Astr.J.Suppl. 148,175(2003)
[3] John Ellis ,Toby Falk and Keith A. Olive, hep-ph/9810360
[4] J. Edsjo, M. Schelke, P.Ullio and P.Gondolo, hep-ph/0301106
[5] Howard Baer and Tadas Krupovnickas, hep-ph/0405058
[6 ] R.Arnowitt, Bhaskar Dutta, T.Kamon and V. Khotilovich, hep-ph/0411102
[7] R.M.Godbole,Monoranjan Guchait and D.P.Roy, hep-ph/0411306
[8] V. Khotilovich ,R.Arnowitt, Bhaskar Dutta and T.Kamon hep-ph/0503165
[9] Valery Telnov, hep-ph/9810019
[10] Marc Baillargeon, Genevieve Belanger and Fawzi Boudjema, hep-ph/9405359
[11] I.F. Ginzburg and G.L. Kotkin, hep-ph/9905462
[12] Alekasander Fillip Zarnechi, hep-ph/0207021
[13]T.Maryer,C.Blochinger, F.Franke, H.Fraas,Eur.Phys. J,C27,135-143(2003)
[14] Johannes Blumlein and Alexander Kryukov, hep-ph/0008097
[15] Frank Cuypers ,Geert van Oldenborgh and Reinhold Ruckl, hep-ph/9302302
[16] Eran Yehudai,Phys.Rev.D44,3434(1991)