Chapter 2.3 - Precision Electroweak Program
The complete Chapter 2.3 document is available
here.
Figures
-
Figure 2.9
-
$E/p$ distribution of electrons from $W$ decays.
The solid (dotted, dashed) histogram uses 8\% X$_o$
(17\% X$_o$, 30\% X$_o$) of
the detector material up to the middle of the CTC.
-
Figure 2.10
-
The $| \eta_{\rm det} |$ distributions of plug $W$ electrons.
Events in CTC sample are concentrated in the low
$| \eta_{\rm det} |$ because the CTC track finding efficiency
quickly falls. The SVX sample events are populated more uniformly
in $| \eta_{\rm det} |$.
-
Figure 2.11 -
The lepton charge signed pseudo-rapidity distribution of
the lepton
and
the photon
in the $W\gamma$ production.
-
Figure 2.12 -
The lepton charge signed pseudo-rapidity distribution of
the lepton
and
the photon
in $Z\gamma$ production.
-
Figure 2.13 -
The data point in the
left figure
represents the CDF measurements of
$M_W$ and $M_{\rm top}$, and the point in the
right figure
represents the CDF II estimate for 2~fb$^{-1}$.
The curves are from a calculation~\protect\cite{mwvsmtop} of the dependence of
$M_W$ on $M_{\rm top}$ in the minimal standard model using several Higgs
masses. The bands are the uncertainties obtained by folding in quadrature
uncertainties on $\alpha(M_Z^2)$, $M_Z$, and $\alpha_s(M_Z^2)$.
-
Figure 2.14 -
Transverse mass distributions for $W\rightarrow e\nu$ and
$W\rightarrow \mu\nu$
from
Run Ia
($a$ and $b$) which gave a $\pm 180$ MeV/c$^2$ measurement
of the $W$ mass,
and the equivalent preliminary distributions from the first 67~pb$^{-1}$
of
Run Ib
($c$ and $d$).
-
Figure 2.15 -
Left:
The radial distributions for conversions (solid line) and
background (dashed line).
Right:
Reconstructed photon conversion vertex density in the
$r$-$\phi$ plane for the innermost super-layer in the CTC,
folded into 1/30 of the
circumference (this layer has 30-fold symmetry).
-
Figure 2.16 -
Change in derived $W \rightarrow e\nu$ mass
($\Delta M_W^e$) versus the
signed deviation in units of standard deviations
from the average Run Ia $W$ asymmetry measurement
($\zeta$) for various PDFs. The lower edge of the fitting region
is
$(a)$ 60, $(b)$ 65
, and
$(c)$ 70~GeV
Note that raising the lower edge of the fitting region makes
the result less sensitive to PDFs, particularly for variation
not correlated to the asymmetry.
-
Figure 2.17
-
Transverse mass distribution ($M_T^W$) for $W \rightarrow e\nu$
candidates along with background and signal expectation.
The inset is the fit to $M_T^W > 110$ GeV/c$^2$.
-
Figure 2.18
-
Indirect and direct measurements of $\Gamma_W$ and the
predicted uncertainty from the direct measurement for 2~fb$^{-1}$ of data.
The dotted band represents the standard model prediction.
-
Figure 2.19
-
The double differential distribution
d^2 / dy(\gamma)dy(\ell)$ for $p \bar p \rightarrow W^+\gamma
\rightarrow \ell\nu\gamma$ (Left) and
$Z\gamma
\rightarrow \ell\ell\gamma$ (Right).
-
Figure 2.20
-
The measured cross sections of diboson productions and the
theoretical predictions.
-
Figure 2.21 -
The lepton charge signed pseudo-rapidity difference
distribution in the $W\gamma$ production for
$| \eta_{\ell} | < 1.0$ and $| \eta_{\gamma} | < 1.0$
(Left)
, and
$| \eta_{\ell} | < 2.5$ and $| \eta_{\gamma} | < 2.5$
(Right)
.
-
Figure 2.22 -
95\% CL limits on anomalous couplings. Present limits
(Left)
and
expected limits with 2~fb$^{-1}$
(Right)
on $WWV$ $(V = W, \gamma)$ anomalous
couplings.
-
Figure 2.23
-
Present limits on $ZZ\gamma$ anomalous couplings.
-
Figure 2.24 -
The invariant mass distribution of events in the high mass
sample
(Left)
and the pole region sample
(Right)
.
-
Figure 2.25
-
Results of our measurement of A$_{FB}$, compared with a Standard
Model calculation. The solid line is a bin-by-bin calculation of
A$_{FB}$ (MRSA), and the dashed line is the same calculation integrated
over the two mass regions.
-
Figure 2.26 -
Left:
Combined Run Ia $W$ charge asymmetry measurement
using muons and central
and plug electrons. These data have been used as input in
determining recent PDF sets.
Right:
Combined $W$ charge asymmetry using
Run Ia and Ib data including the forward muons.
-
Figure 2.27
-
Drell-Yan dilepton $(e^+e^-, \mu^+\mu^-)$ production cross section
from Run Ia and Ib as a function of the dilepton invariant mass.