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Search for Neutral Supersymmetric Higgs Bosons in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV

CDF collaboration

TL;DR

No evidence of a neutral Higgs bosons produced in association with b quarks is found and the data is interpreted in the context of theneutral Higgs sector of the Minimal Supersymmetric extension of the Standard Model.

Abstract

We present the results of a search for neutral Higgs bosons produced in association with $b$ quarks in $p\bar{p}\to b\bar{b} φ\to b\bar{b}b\bar{b}$ final states with $91 \pm 7$ pb$^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV recorded by the Collider Detector at Fermilab. We find no evidence of such a signal and the data is interpreted in the context of the neutral Higgs sector of the Minimal Supersymmetric extension of the Standard Model. With basic parameter choices for the supersymmetric scale and the stop quark mixing, we derive 95% C.L. lower mass limits for neutral Higgs bosons for $\tb$ values in excess of 35.

Search for Neutral Supersymmetric Higgs Bosons in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV

TL;DR

No evidence of a neutral Higgs bosons produced in association with b quarks is found and the data is interpreted in the context of theneutral Higgs sector of the Minimal Supersymmetric extension of the Standard Model.

Abstract

We present the results of a search for neutral Higgs bosons produced in association with quarks in final states with pb of collisions at TeV recorded by the Collider Detector at Fermilab. We find no evidence of such a signal and the data is interpreted in the context of the neutral Higgs sector of the Minimal Supersymmetric extension of the Standard Model. With basic parameter choices for the supersymmetric scale and the stop quark mixing, we derive 95% C.L. lower mass limits for neutral Higgs bosons for values in excess of 35.

Paper Structure

This paper contains 3 figures, 2 tables.

Figures (3)

  • Figure 1: Invariant mass distributions $m_{12}$ and $m_{23}$ for the observed triple $b$-tagged sample co-rres-pon-ding to the $m_{\varphi}=70$ GeV/c$^2$ (top), $m_{\varphi}=120$ GeV/c$^2$ (middle), and $m_{\varphi}=200$ GeV/c$^2$ (bottom) selections. The data is compared to the expected QCD only background, the total SM backgrounds, and the total background plus signal for $\hbox{$\tan\beta$} = 50$ and the no mixing case. The use of $m_{23}$ for $m_\varphi \le 120$ GeV/c$^2$, and $m_{12}$ for $m_\varphi > 120$ GeV/c$^2$ maximizes the fraction of correct jet assignments and enhance the signal resolution (see text). The mass cuts are not applied.
  • Figure 2: CDF 95% C.L. excluded region in the parameter space $m_h-\hbox{$\tan\beta$}$ for the two stop mixing scenarios: (a) no mixing, and (b) maximal mixing. Also shown are the theoretically forbidden regions and the LEP exclusion region for their no mixing and $m_h^{max}$ scenarios [16].
  • Figure 3: CDF 95% C.L. excluded region in the parameter space $m_A-\hbox{$\tan\beta$}$ for the two stop mixing scenarios: no mixing (dashed lines) and maximal mixing (solid line). Also shown is the LEP exclusion region for the no mixing scenario [16].