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Model Building and Collider Phenomenology

Model Building and Collider Phenomenology. Maxim Perelstein, Cornell LHC Theory Initiative Meeting, May 4 2005. The mechanism which breaks electroweak symmetry remains a fundamental, unsolved mystery

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Model Building and Collider Phenomenology

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  1. Model Building and Collider Phenomenology • Maxim Perelstein, Cornell • LHC Theory Initiative Meeting, May 4 2005

  2. The mechanism which breaks electroweak symmetry remains a fundamental, unsolved mystery • Several theoretical ideas for what the EWSB mechanism might be have been proposed (supersymmetry, dynamical symmetry breaking, extra dimensions, little Higgs, ...) • True model is unknown (only theoretical prejudice to guide us at this point...) • All models predict new physics at energy scales accessible at the LHC - theory will be confronted with data

  3. “NEW PHYSICS PIPELINE” Build a Model Identify Collider Signatures Compute Signal Cross Sections Compute Backgrounds and Optimize Cuts Confront with Data

  4. Robust, detail-independent signatures need to be identified for each class of models (input from model builders is important!!!) • Backgrounds to the proposed signatures need to be understood and controlled • MC tools need to be constructed and made available to experimenters • Today, different steps are done by different groups, often poor communication, slow, many interesting models are overlooked • In the LHC era, quick turnaround time will be essential - a well-organized, coordinated structure will help

  5. The time to create such a structure is now! • Proposal: a series of small (30-40 participants) workshops bringing together model builders, collider phenomenology experts, and experimenters (models: Aspen, Les Houches?) • Duration: 2-3 weeks (to allow for real progress on collaborative projects) • Frequency: 1-2 a year • Location: existing facilities (e.g. Fermilab, BNL, LBNL - CMS/ATLAS analysis centers); would be happy to host #1 at Cornell!

  6. Support for longer-term visits by collaborators (sabbatical leaves, etc.) • A few dedicated postdoctoral positions would greatly boost this effort (shared between institutions?) • Good opportunity - a modest investment could help us get prepared for important discoveries ahead!

  7. High-Energy Phenomenology at Cornell (CIHEP) • 3+1 full-time faculty focusing on phenomenology (Csaki, Neubert, Perelstein + Lepage) • ~2 postdocs • ~7 graduate students • Large experimental group at CMS

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