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We derive a kinematic variable that is sensitive to the mass of the StandardModel Higgs boson (M_H) in the H->WW*->l l nu nu-bar channel using symbolicregression method. Explicit mass reconstruction is not possible in this channeldue to the presence of two neutrinos which escape detection. Mass determinationproblem is that of finding a mass-sensitive function that depends on themeasured observables. We use symbolic regression, which is an analyticalapproach to the problem of non-linear regression, to derive an analytic formulasensitive to M_H from the two lepton momenta and the missing transversemomentum. Using the newly-derived mass-sensitive variable, we expect Higgs massresolutions between 1 to 4 GeV for M_H between 130 and 190 GeV at the LHC with10 fb^-1 of data. This is the first time symbolic regression method has beenapplied to a particle physics problem.

Construction of a Kinematic Variable Sensitive to the Mass of the Standard Model Higgs Boson in H->WW*->l l nu nu-bar using Symbolic Regression