BROOKHAVEN NATIONAL LABORATORY MEMORANDUM HOMER L DODGE DEPARTMENT OF PHYSICS AND ASTRONOMY, UNIVERSITY OF OKLAHOMA, NORMAN OK Date: 31 January 2018 To: ISAJET Users From: F.E. Paige, S.D. Protopopescu, H. Baer, X. Tata Subject: ISAJET 7.88 ISAJET 7.88 is now available. We dedicate this version to Frank Paige (who passed away on October 16, 2017). Frank-- along with Serban Protopopescu-- created the original Isajet code in the late 1970s. Version 7.88 includes the {\it natural} anomaly-mediated SUSY breaking model, using keyword input NAMSB. This model includes independent bulk soft term contributions to Higgs scalars $m_{H_u}(bulk)$ and $m_{H_d}(bulk)$ along with small bulk $A_0$ terms. These added terms can render AMSB as a natural model with $m_h\sim 125$ GeV for appropriate parameter choices. For natural parameter choices, then the LSP is a higgsino rather than a wino. The parameter space is given by $m_0(1,2)$, $m_0(3)$, $m_{3/2}$, $A_0$, $\tan\beta$, $\mu$ and $m_A$ where small $\mu\sim 100-300$ GeV, $A_0\sim m_0(3)$ and 80 TeV$