Search for Z γ events with large missing transverse energy in p p ¯ collisions at s = 1.96 TeV T R Wyatt , Steve Shaw , A A Shchukin , R K Shivpuri , V Simak , P Skubic , P Slattery , D Smirnov , K J Smith , G R Snow , J Snow , Scott A Snyder , S Soldnerrembold , L Sonnenschein , K Soustruznik , J Stark , D A Stoyanova , M Strauss , L Stutte , Laura Suter , P Svoisky , Masaharu Takahashi , M Titov , V V Tokmenin , Y T Tsai , K Tschanngrimm , M D Hildreth , R Hirosky , T Hoang , J D Hobbs , B Hoeneisen , M Hohlfeld , I Howley , S Uvarov , L Uvarov , D Tsybychev , B Tuchming , C Tully , Jianzhong Zhu , B Zhou , T G Zhao , J Zennamo , S W Youn , K Yip , Hang Yin , Zhizhong Ye , S Chakrabarti , D Chakraborty , Q Z Li , Li Li , Haifeng Li , J Lellouch , K M Chan , A Chandra , E Chapon , Guoming Chen , S Chevalierthery , D K Cho , S W Cho , Suyong Choi , B Choudhary , W M Lee , S W Lee , H S Lee , P Lebrun , G Landsberg , S Lammers , W Ye , Y A Yatsunenko , Takeshi Yasuda , W C Yang , V A 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摘要
We present the first search for new phenomena in Z gamma final states with large missing transverse energy using data corresponding to an integrated luminosity of 6.2 fb(-1) collected with the D0 experiment in p (p) over bar collisions at root s 1.96 TeV. This signature is predicted in gauge-mediated supersymmetry-breaking models, where the lightest neutralino (chi) over tilde (0)(1) is the next-to-lightest supersymmetric particle and is produced in pairs, possibly through decay from heavier supersymmetric particles. The (chi) over tilde (0)(1) can decay either to a Z boson or a photon and an associated gravitino that escapes detection. We exclude this model at the 95% C.L. for supersymmetry-breaking scales of Lambda < 87 TeV.
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