Pseudo-Higgs Signals at LHC

A general interpretation of Higgs Data

Linda Carpenter@ Moriond 2013

Work done with J. Goodman, T. Han and N. Christensen

New Particle at ~126 GeV is it a standard Higgs?

May be deviations from Standard Higgs scenario

If the Higgs results deviate from the minimal case they will point us towards models of New Physics. Different models will effect ratios of Higgs events in certain channels. For example extra charged leptons will change the Higgs effective coupling to photons and not gluons.

Effective Operator Method

Parameterize New Physics as series of effective operators in the Lagragrangian

Express the Operators as Effective Couplings

We can pick difference parameterizations for the

coefficients

All relevant Higgs processes may be written as functions of different effective couplings

We may calculate analytic xsecs for 126 GeV particle in terms of effective couplings

For example Single Higgs Production and Associated Production

And 2-3 Processes

We Can calculate how each coefficient effects the varies with

sqrt S

We Also Calculate Branching Fractions

We can use ratios of Higgs events in different final states to rule on models of new physics: each model will have a unique prediction of number of Higgs events in each standard search channel

This Procedure works for any Higgs-like state whose cross sec x b.f may be Calculated for any Mass

ConclusionsWith effective operator analysis we may calculate analytic

xsec, production times bf for Higgs-like states in any search channel in any mass bin

We may scale these results by sqrt s

In any BSM model there will be correlations across channels therefore

Results may be used to rule on a wide variety BSM Higgs scenarios by comparing to SM Higgs searches across channels

So far all xsec times bf’s have been calculated for 126 GeV particle

Now we may test a variety of BSM scenarios, eg heavy fermions, colored scalars, 2 Higgs doublet models, NMSSM scenarios