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“Hidden Valley”:

A currently-hidden sector, with light particles, and with ultraweak couplings to standard model; can easily arise in string theory. Z’ Decay to Long-Lived Hidden-Valley Particles. ATLAS Rome-Seattle working group: Guido Ciapetti Carlo Dionisi Stefano Giagu Daniele DePedis

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“Hidden Valley”:

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  1. A currently-hidden sector, with light particles, and with ultraweak couplings to standard model; can easily arise in string theory Z’ Decay to Long-Lived Hidden-Valley Particles ATLAS Rome-Seattle working group: Guido Ciapetti Carlo Dionisi Stefano Giagu Daniele DePedis Giuseppe Salamanna Aleandro Nisati Marco Resigno Lucia Zanello Barbara Mele Henry Lubatti Matt Strassler Dan Ventura Laura Bodine “Hidden Valley”: M. Strassler & K. Zurek 4/2006 Y Y X Z 110 cm Z’  v-quark pair v-pion mass: 40 GeV v-pion lifetime: 180 ps dashed blue: v-pi-zero solid red: charged particle dashed red: neutral hadron pT cut: 1.5 GeV green: EM calorimeter

  2. Higgs Decay to Long-Lived Particles ATLAS Rome-Seattle working group: Guido Ciapetti Carlo Dionisi Stefano Giagu Daniele DePedis Giuseppe Salamanna Aleandro Nisati Marco Resigno Lucia Zanello Barbara Mele Henry Lubatti Matt Strassler Dan Ventura Laura Bodine But can any events pass the trigger? Discovery Mode for Higgs? M. Strassler & K. Zurek 5/2006 Y Z 60 cm gg  h  X X X mass: 30 GeV X lifetime: 130 ps dashed blue: X (neutral) solid red: charged particle dashed red: neutral hadron pT cut: 2.5 GeV green: EM calorimeter

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