A Search for Doubly-Charged Bosons decaying to Like-Sign
Dileptons at CDF with 6.1 fb$^{-1}$
D. Whiteson and R. Porter, UC Irvine
V. Rusu, FNAL
P. Wittich and P. Kittiwisit, Cornell
Abstract:
We present a search for pair production of doubly-charged scalars
decaying to like-sign dileptons using data with an integrated
luminosity of 6.1 fb$^{-1}$. The observed data are consistent with
standard model predictions, and we set 95\% CL lower limit on the
scalar mass in the range 190-245 GeV/$c^2$, depending on the theory
and the decay channel.
Companion analysis: inclusive like-sign dileptons
Conference note
(Click each plot for PDF)
Upper limits at 95\% CL on the production cross-section for
doubly-charged Higgs, assuming 100% branching fraction to
$ee,\mu\mu$ or $e\mu$. Also shown are next-to-leading-order
theoretical calculations of the cross-section, assuming the Higgs is
a member of a singlet, doublet or triplet.
(Click each plot for PDF)
Distribution of jet multiplicity in observed same-sign
dilepton events and expected backgrounds.
(Click each plot for PDF)
Distribution of missing transverse energy in observed same-sign
dilepton events and expected backgrounds.
(Click each plot for PDF)
Distribution of leading lepton $p_T$ in observed same-sign
dilepton events and expected backgrounds.
(Click each plot for PDF)
Reconstructed like-sign dilepton invariant mass for signal
H++/-- events
(Click each plot for PDF)
Reconstruction efficiency versus Higgs mass in $ee$ (left) $e\mu$ (center), and
$\mu\mu$ (right) events.
(Click each plot for PDF)
Signal and backgrounds in the $ee,\mu\mu$ and $e\mu$
channels with example $H^{++
(Click each plot for PDF)
Observed and expected limits compared to the theoretical
predictions for the $ee$ (top), $e\mu$ (center) and $\mu\mu$ (bottom) channels.
We present a search for pair production of doubly-charged scalars decaying to like-sign dileptons using data with an integrated luminosity of 6.1 fb$^{-1}$. The observed data are consistent with standard model predictions, and we set 95\% CL lower limit on the scalar mass in the range 190-245 GeV/$c^2$, depending on the theory and the decay channel.
|
Upper limits at 95\% CL on the production cross-section for doubly-charged Higgs, assuming 100% branching fraction to $ee,\mu\mu$ or $e\mu$. Also shown are next-to-leading-order theoretical calculations of the cross-section, assuming the Higgs is a member of a singlet, doublet or triplet. |
|
|
|
|
Distribution of jet multiplicity in observed same-sign dilepton events and expected backgrounds. |
|
Distribution of missing transverse energy in observed same-sign dilepton events and expected backgrounds. |
|
Distribution of leading lepton $p_T$ in observed same-sign dilepton events and expected backgrounds. |
|
Reconstructed like-sign dilepton invariant mass for signal H++/-- events |
|
Reconstruction efficiency versus Higgs mass in $ee$ (left) $e\mu$ (center), and $\mu\mu$ (right) events. |
|
Signal and backgrounds in the $ee,\mu\mu$ and $e\mu$ channels with example $H^{++ |
|
Observed and expected limits compared to the theoretical predictions for the $ee$ (top), $e\mu$ (center) and $\mu\mu$ (bottom) channels. |
|