Search for supersymmetry with the vector boson fusion topology in proton-proton collisions at collisions at $\sqrt{s}=8$ TeV

Abstract

The first search for supersymmetry with the vector boson fusion (VBF) topology is presented. The VBF topology offers a promising avenue to study the electroweak sector of supersymmetry. The search targets final states with at least two leptons, large missing transverse momentum, and two jets with a large pseudorapidity gap. The data sample used in this analysis corresponds to an integrated luminosity of 19.7$fb^{-1}$ of pp collisions at $\sqrt{s}=8$ TeV collected with the CMS detector. The observed dijet invariant mass spectrum after the final selections is consistent with the expected standard model predictions. Upper limits are set for the production of charginos and neutralinos with two associated jets, where sleptons are ligher than charginos.

Approved tables and plots

Tables on Paper

Tables	Caption
	Number of observed events in data and estimated background rates for the OS search channels. The uncertainties are based on the number of observed events in the control regions as well as the statistics in simulation.
	Number of observed events in data and estimated background rates for the LS channels. The uncertainties are based on the number of observed events in the control regions as well as the statistics in simulation.
	Cumulative signal acceptance for m(j,j) > 250 GeV.
	Simulated yield of signal events. The terms in only curly brackets, {m(${\tilde{\chi}^{\pm}_{1}}$), m(${\tilde{\tau_{1}}}$)}, represent the scenarios where $\Delta$m(${\tilde{\chi}^{\pm}_{1}}, {\tilde{\tau_{1}}}$) = 5 GeV, while the terms in parenthesis, ({m(${\tilde{\chi}^{\pm}_{1}}$), m(${\tilde{\tau_{1}}}$)}), are for scenarios where m(${\tilde{\tau_{1}}}$) = 1/2m(${\tilde{\chi}^{\pm}_{1}}$) + 1/2m(${\tilde{\chi}^{0}_{1}}$).

Plots on Paper

	Figures	Caption
a		m(j, j) distributions in the (a) OS ${\mu\mu}$, (b) LS ${\mu\mu}$, (c) OS ${e\mu}$, and (d) LS ${e\mu}$ signal regions. The signal scenario with m(${\tilde{\chi}^{0}_{2}})$ = m(${\tilde{\chi}^{\pm}_{1}}$) = 200 GeV, m(${\tilde{\tau_{1}}}$) = 195 GeV, and m(${\tilde{\chi}^{0}_{1}}$)= 0 GeV is shown. The shaded band in the ratio plot corresponds to the systematic uncertainty on the background prediction.
b
c
d
a		m(j, j) distributions in the (a) OS ${\mu\tau_{h}}$, (b) LS ${\mu\tau_{h}}$, (c) OS ${\tau_{h}\tau_{h}}$, and (d) LS ${\tau_{h}\tau_{h}}$ signal regions. The signal scenario with m(${\tilde{\chi}^{0}_{2}})$ = m(${\tilde{\chi}^{\pm}_{1}}$) = 200 GeV, m(${\tilde{\tau_{1}}}$) = 195 GeV, and m(${\tilde{\chi}^{0}_{1}}$)= 0 GeV is shown. The shaded band in the ratio plot corresponds to the systematic uncertainty on the background prediction.
b
c
d
a		(a) m(j,j) efficiencies for the Z and $t\bar{t}$ control regions of the $\mu\mu$jj final state. (b) m(j,j) signal region distribution for the combination of all search channels. The signal scenario with m(${\tilde{\chi}^{0}_{2}})$ = m(${\tilde{\chi}^{\pm}_{1}}$) = 200 GeV, m(${\tilde{\tau_{1}}}$) = 195 GeV, and m(${\tilde{\chi}^{0}_{1}}$)= 0 GeV is shown. The shaded band in the ratio plot corresponds to the systematic uncertainty on the background prediction.
b
a		Combined 95% CL upper limits on the cross section as a function of m(${\tilde{\chi}^{0}_{2}})$ = m(${\tilde{\chi}^{\pm}_{1}}$). The figure (a) shows the upper limits for the scenario where m(${\tilde{\tau_{1}}}$) is defined as m(${\tilde{\chi}^{\pm}_{1}}$) - m(${\tilde{\tau_{1}}}$) = 5 GeV, for two different m(${\tilde{\chi}^{0}_{1}}$) definitions:m(${\tilde{\chi}^{\pm}_{1}}$) - m(${\tilde{\chi}^{0}_{1}}$) = 50 GeV (compressed spectra) and m(${\tilde{\chi}^{0}_{1}}$) = 0 GeV (large mass gap). The figure (b) shows the upper limits for the scenarios where is defined as m(${\tilde{\tau_{1}}}$) = 1/2m(${\tilde{\chi}^{\pm}_{1}}$) + 1/2m(${\tilde{\chi}^{0}_{1}}$), for the same two m(${\tilde{\chi}^{0}_{1}}$) definitions.
b

-- ShoMaruyama - 2015-03-07