Abstract

We present a search for associated production of the standard model (SM) Higgs boson and a Z boson where the Z boson decays to two leptons and the Higgs decays to a pair of b quarks. We use a matrix element weighting technique to construct the likelihood functions of the Higgs content of the data sample. In 2.7/fb of CDF data we observe a 95% C.L. of 7.8 times the SM prediction while the median expected 95% C.L. is 12.3 times the SM prediction for mH=115 GeV/c2.

95% Confidence Limit

at MH=115 GeV/c2 with 2.7/fb of data

12.3 x predicted SM cross section (expected)

7.8 x predicted SM cross section (observed)

Confidence intervals and expected 95% CL distribution for mH=115 GeV/c2

Expected and observed 95% CL for mH=[100,150] GeV/c2

Documentation

A note describing the analysis can be found here.

Tables

Expected and observed event totals for >=1 tight tag channel

pdf png

Expected and observed event totals for 2 loose tag channel

pdf png

Plots

Data Likelihood Curve for mH=115 GeV/c2

pdf png

Pretag Kinematics Plots

Single Tagged Kinematics Plots

Double Tagged Kinematics Plots

Matrix Element agreement (tagged)

ZH : eps
ZJJ : eps
ZZ : eps
Ttbar : eps

 

Matrix Element agreement (pretag)

ZH : eps
ZJJ : eps
ZZ : eps
Ttbar : eps

 

Contact

The primary authors for this analysis are: