1 Bard: Interpreting New Frontier Energy Collider Physics Bruce Knuteson MIT DIS 0621 April 2006 The solution to the LHC Inverse Problem 2 The first sign of new physics will come from: Heavy gauge bosons Technicolor Large extra dimensions Leptoquarks Supersymmetry Fourth generation fermions Compositeness Something else 3 The values of the 105 MSSM parameters are: 4 Standard Model Data 5 Bard model construction weave a story 6 hep-ph/ 7 If we see a signal, how do we interpret it in terms of the underlying physical theory? 8 9 Generic new particles spin 0, , 1 electric charge n/3 color singlet, triplet or octet 10 Generic new vertices 11 Prune diagrams 12 Bard stories |g| 2 m 1 m 2 m 3 13 Bard output Ordered list of stories, together with best fit parameters and errors Analysis details are available from links 14 15 Quaero status currently no competition D Run IPRL H1 L3 Aleph technically complete, not yet published CDF Run II under development discrepancy finding Run I data 16 (prediction) d(hep-ph) 17 Sleuth How do we find the excess? New physics will appear: 1. Predominantly in one exclusive final state 2. At large p T 3. As an excess quasi model independent 18 Sleuth / General Search status currently no competition D Run I Phys.Rev.D 62:092004,2000 Phys.Rev.D 64:012004,2001 Phys.Rev.Lett.86:3712,2001 H1 Run I Phys.Lett.B 602:14-30,2004 P=0.03 19 Vista How do we understand the data in the first place? currently no competition 20 Vista Filter events of interest e j pp e Simulate detector response e jb e e-3 0.87 j 1e-42e-63e-36e-412e-3 b 1e-3 5e-38e true reconstructed ( mis ) Id Fit for experimental & theoretical fudge factors Define physics objects b Estimate backgrounds 21 toy example 22 Summary FermilabCERNDESY and many others Special thanks to: Interpreting new frontier energy collider physicsBard The solution to the LHC Inverse Problem Quickly testing specific hypothesesQuaero Finding an excessSleuth Systematically understanding the data in the first placeVista