在GMSB模型中，第二輕的超對稱粒子neutrilino會衰變成光子和gravitino。當neutrilino的衰變長度大於實驗設備時，一般的對撞機實驗及無法分辨GMSB模型與一般超重力模型的預測結果。在這裡，我們提出了一種新方法去偵測此種常衰變長度的neutrilino。當高能量的宇宙線與大氣層中的粒子發生碰撞時，將產生超對稱粒子。這些超對稱粒子將衰變成neutrilino。上述的neutrilino在大氣成中經歷了一段距離後將衰變成光子和gravitino。我們預期使用地表上的偵測器可以幫助偵測到這些光子。這個方法可以偵測到的超對稱破壞尺度介於10^4~10^6 GeV 之間。光子產生率的數量級約10^(-4) 每平方公里每年每單位立體角。

In gauge-mediated models, the next-to-lightest supersymmetric particle (NLSP), may travel
a long distance before decaying into a gravitino and a photon. The collider experiment is not
able to distinguish such a scenario from the usual supergravity models when the decay time of the
NLSP is long enough. Here we propose a new method to detect such a long decay of the NLSP.
The high energy cosmic rays hitting the atmosphere will produce a lot of SUSY particles, which
decay promptly into the NLSP. The can travel a distance of the order of the atmosphere and
decays into a photon and a gravitino. We suggest to use the ground-based arrays of telescopes to
detect the photon. This method can probe a SUSY breaking scale sqrt(<F>) ~ 10^4~10^6 GeV. The event
rate could be as high as O(10^(-4)) per km^2 per year per sr.

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