Difference: Hig11002TWiki (1 vs. 2)

Revision 22011-03-15 - MicheleGallinaro

Line: 1 to 1
 
META TOPICPARENT name="PasChHiggs2011"

Search for charged Higgs boson in ttbar in pp collisions at $\sqrt{s}=7$TeV

Line: 13 to 13
 

Figures and Tables from CMS-HIG-11-002

Figure Label Description
Added:
>
>
Figure 1, left Feynmann diagram of $t\bar t$ production in the SM "tau dilepton" final state.
Figure 1, right Feynmann diagram of $t\bar t$ production in the presence of MSSM charged Higgs boson.
 
Figure 2, left Jet multiplicity distribution ($p_T>30$ GeV/c, $\eta<2.4$) after requiring one isolated lepton.
Figure 2, right MET distribution for events with one isolated lepton and at least two jets; the hatched area shows the uncertainty. The last bin includes the events in the overflow bins.
Figure 3 Data and MC event yields at various levels of the selection.
Line: 38 to 40
 
META FILEATTACHMENT attachment="summary-tab-tau-3-syst.tex" attr="" comment="" date="1300121181" name="summary-tab-tau-3-syst.tex" path="summary-tab-tau-3-syst.tex" size="1128" stream="summary-tab-tau-3-syst.tex" tmpFilename="/usr/tmp/CGItemp15312" user="michgall" version="1"
META FILEATTACHMENT attachment="Table1.png" attr="" comment="" date="1300122553" name="Table1.png" path="Table1.png" size="56395" stream="Table1.png" tmpFilename="/usr/tmp/CGItemp15336" user="michgall" version="1"
META FILEATTACHMENT attachment="Table2.png" attr="" comment="" date="1300122710" name="Table2.png" path="Table2.png" size="117647" stream="Table2.png" tmpFilename="/usr/tmp/CGItemp15229" user="michgall" version="1"
Added:
>
>
META FILEATTACHMENT attachment="feyn_ww_LHC.png" attr="" comment="" date="1300202997" name="feyn_ww_LHC.png" path="feyn_ww_LHC.png" size="8826" stream="feyn_ww_LHC.png" tmpFilename="/usr/tmp/CGItemp15998" user="michgall" version="1"
META FILEATTACHMENT attachment="feyn_wh_LHC.png" attr="" comment="" date="1300203011" name="feyn_wh_LHC.png" path="feyn_wh_LHC.png" size="8458" stream="feyn_wh_LHC.png" tmpFilename="/usr/tmp/CGItemp15857" user="michgall" version="1"

Revision 12011-03-14 - MicheleGallinaro

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="PasChHiggs2011"

Search for charged Higgs boson in ttbar in pp collisions at $\sqrt{s}=7$TeV

Main Results

The large top quark production cross section at the Large Hadron Collider offers the opportunity to search for the charged Higgs boson as the decay $t\rightarrow H^+b\rightarrow \tau^+\nu b$ can be large in extensions of the standard model, if the mass is lighter than the top quark mass. A direct search for the charged Higgs boson in events with one lepton (electron or muon), at least two jets, missing transverse energy, and one hadronically decaying tau lepton has been performed in 36 pb$^{-1}$ of data collected in proton-proton collisions at $\sqrt{s}=7$ TeV. We do not find a signal in our search and derive an upper limit on the branching ratio $BR(t\rightarrow H^+b)\simeq 0.25-0.28$ for masses between 80 and 140GeV/$c^2$, when assuming $BR(H^+\rightarrow \tau^+\nu)=1$.

Figures and Tables from CMS-HIG-11-002

Figure Label Description
<!-- -->
Sorted ascending
Figure 3 Data and MC event yields at various levels of the selection.
Figure 5 Expected number of $t \bar{t}$ events after the final event selection as a function of the branching ratio $BR(t\rightarrow  H^{+}b)$ for $M_{H ^{+}}$=120 GeV/$c^2$. Expectations are also shown separately for WH, HH and $t \bar{t} \rightarrow W^+bW^-\bar{b}$ (WW) contributions.
Figure 4, left Inclusive jet $p_T$ distribution for $\ell+\geq3$ jet events after the MET cut, and with at least two jets with $p_T>$ 30 GeV/c and at least one jet with $p_T>$20 GeV/c. Entries in the last bin include the overflows.
Figure 2, left Jet multiplicity distribution ($p_T>30$ GeV/c, $\eta<2.4$) after requiring one isolated lepton.
Figure 2, right MET distribution for events with one isolated lepton and at least two jets; the hatched area shows the uncertainty. The last bin includes the events in the overflow bins.
Table 2 Number of expected events for the backgrounds, signal events from $t \bar{t} \rightarrow H^{\pm}bH^{\mp}\bar{b}$ (HH) and $t \bar{t} \rightarrow W^{\pm}bH^{\mp}\bar{b}$ (WH) processes at $M_{H ^{\pm}}$=120 GeV/$c^2$, and the number of observed events after the final event selection. Statistical and systematic uncertainties are shown. The statistical uncertainties are due to MC statistics, while for the $\tau$-fakes the statistical uncertainties are due to the fake rate in the data. Of the 40 events found in the data, 16~(24) events are in the $e\tau$ ($\mu\tau$) final state, which is expected as the electron efficiency is lower than the muon efficiency.
Figure 4, right Probability that a jet fakes a $\tau$-jet as obtained from the QCD multi-jet events taken during runs with and without pileup.
Figure 6 The relation between $N_{up}$ and the upper limit on $BR(t\rightarrow  H^{+}b)$ for the observed and the expected limit with $\pm 1\sigma$ error band shown in yellow color for $M_{H^{\pm}}$=120~GeV/c$^2$, where $BR(H^{+} \rightarrow \tau \nu)=1$ is assumed.
Table 1 The systematics uncertainties for backgrounds, signal events from $t \bar{t} \rightarrow H^{\pm}bH^{\mp}\bar{b}$ (HH) and $t \bar{t} \rightarrow W^{\pm}bH^{\mp}\bar{b}$ (WH) processes at $M_{H ^{\pm}}$=120 GeV/%$c^2$. These systematic uncertainties are given as the input for the exclusion limit calculation.
Figure 7 Upper limit on $BR(t\rightarrow H^{+}b)$ assuming $BR(H^{+} \rightarrow \tau \nu)=1$ as a function of $M_{H^{+}}$. The yellow band shows the $\pm 1\sigma$ band around the expected limit.

-- MicheleGallinaro - 14-Mar-2011

META FILEATTACHMENT attachment="leptonjets_pf_jetmultiplicity_init_noratio.png" attr="" comment="" date="1300118902" name="leptonjets_pf_jetmultiplicity_init_noratio.png" path="leptonjets_pf_jetmultiplicity_init_noratio.png" size="13823" stream="leptonjets_pf_jetmultiplicity_init_noratio.png" tmpFilename="/usr/tmp/CGItemp15212" user="michgall" version="1"
META FILEATTACHMENT attachment="leptonjets_pf_met_2j_syst.png" attr="" comment="" date="1300119388" name="leptonjets_pf_met_2j_syst.png" path="leptonjets_pf_met_2j_syst.png" size="21282" stream="leptonjets_pf_met_2j_syst.png" tmpFilename="/usr/tmp/CGItemp15312" user="michgall" version="1"
META FILEATTACHMENT attachment="hps0_yields.png" attr="" comment="" date="1300119454" name="hps0_yields.png" path="hps0_yields.png" size="14492" stream="hps0_yields.png" tmpFilename="/usr/tmp/CGItemp15330" user="michgall" version="1"
META FILEATTACHMENT attachment="pf_wplusjets_pt.png" attr="" comment="" date="1300119517" name="pf_wplusjets_pt.png" path="pf_wplusjets_pt.png" size="19927" stream="pf_wplusjets_pt.png" tmpFilename="/usr/tmp/CGItemp15248" user="michgall" version="1"
META FILEATTACHMENT attachment="hps_Loose_eff_vs_Pt_diff_data.png" attr="" comment="" date="1300119968" name="hps_Loose_eff_vs_Pt_diff_data.png" path="hps_Loose_eff_vs_Pt_diff_data.png" size="12111" stream="hps_Loose_eff_vs_Pt_diff_data.png" tmpFilename="/usr/tmp/CGItemp15318" user="michgall" version="1"
META FILEATTACHMENT attachment="summary-tab-tau-3.tex" attr="" comment="" date="1300120055" name="summary-tab-tau-3.tex" path="summary-tab-tau-3.tex" size="961" stream="summary-tab-tau-3.tex" tmpFilename="/usr/tmp/CGItemp15286" user="michgall" version="1"
META FILEATTACHMENT attachment="EventDist_hpsLoose.png" attr="" comment="" date="1300120121" name="EventDist_hpsLoose.png" path="EventDist_hpsLoose.png" size="19751" stream="EventDist_hpsLoose.png" tmpFilename="/usr/tmp/CGItemp15237" user="michgall" version="1"
META FILEATTACHMENT attachment="EventDist_brLimit_hps0_os.png" attr="" comment="" date="1300120154" name="EventDist_brLimit_hps0_os.png" path="EventDist_brLimit_hps0_os.png" size="19473" stream="EventDist_brLimit_hps0_os.png" tmpFilename="/usr/tmp/CGItemp15304" user="michgall" version="1"
META FILEATTACHMENT attachment="limit_hps_loose_upto140GeV.png" attr="" comment="" date="1300121031" name="limit_hps_loose_upto140GeV.png" path="limit_hps_loose_upto140GeV.png" size="16335" stream="limit_hps_loose_upto140GeV.png" tmpFilename="/usr/tmp/CGItemp15356" user="michgall" version="1"
META FILEATTACHMENT attachment="summary-tab-tau-3-syst.tex" attr="" comment="" date="1300121181" name="summary-tab-tau-3-syst.tex" path="summary-tab-tau-3-syst.tex" size="1128" stream="summary-tab-tau-3-syst.tex" tmpFilename="/usr/tmp/CGItemp15312" user="michgall" version="1"
META FILEATTACHMENT attachment="Table1.png" attr="" comment="" date="1300122553" name="Table1.png" path="Table1.png" size="56395" stream="Table1.png" tmpFilename="/usr/tmp/CGItemp15336" user="michgall" version="1"
META FILEATTACHMENT attachment="Table2.png" attr="" comment="" date="1300122710" name="Table2.png" path="Table2.png" size="117647" stream="Table2.png" tmpFilename="/usr/tmp/CGItemp15229" user="michgall" version="1"
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback