Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

MSSM Higgs Boson Phenomenology at the Tevatron Collider

M. Carena, S. Mrenna, C. E. M. Wagner

TL;DR

This study assesses the Tevatron’s sensitivity to MSSM Higgs bosons, focusing on large tanβ where down-type Yukawa corrections become significant. It analyzes production channels Wφ and bb̄φ, incorporating radiative corrections via Δ(m_b) and exploring their impact on cross sections and decays using Hdecay and LO/NLO-inspired backgrounds, with heavy sparticle decoupling assumed. The work demonstrates that, with high luminosity, the Wφ channel offers broad MSSM coverage, while bb̄φ channels probe high tanβ and low-to-intermediate m_A but remain highly sensitive to SUSY corrections and experimental resolution. It also links collider reach to B(b→sγ) constraints and underscores that full MSSM coverage likely requires combining multiple channels and decay modes, given theoretical uncertainties in Higgs-mass corrections and bottom Yukawa renormalizations.

Abstract

The Higgs sector of the minimal supersymmetric standard model (MSSM) consists of five physical Higgs bosons, which offer a variety of channels for their experimental search. The present study aims to further our understanding of the Tevatron reach for MSSM Higgs bosons, addressing relevant theoretical issues related to the SUSY parameter space, with special emphasis on the radiative corrections to the down--quark and lepton couplings to the Higgs bosons for large $\tanβ$. We performed a computation of the signal and backgrounds for the production processes $Wφ$ and $b \bar{b} φ$ at the upgraded Tevatron, with $φ$ being the neutral MSSM Higgs bosons. Detailed experimental information and further higher order calculations are demanded to confirm/refine these predictions.

MSSM Higgs Boson Phenomenology at the Tevatron Collider

TL;DR

This study assesses the Tevatron’s sensitivity to MSSM Higgs bosons, focusing on large tanβ where down-type Yukawa corrections become significant. It analyzes production channels Wφ and bb̄φ, incorporating radiative corrections via Δ(m_b) and exploring their impact on cross sections and decays using Hdecay and LO/NLO-inspired backgrounds, with heavy sparticle decoupling assumed. The work demonstrates that, with high luminosity, the Wφ channel offers broad MSSM coverage, while bb̄φ channels probe high tanβ and low-to-intermediate m_A but remain highly sensitive to SUSY corrections and experimental resolution. It also links collider reach to B(b→sγ) constraints and underscores that full MSSM coverage likely requires combining multiple channels and decay modes, given theoretical uncertainties in Higgs-mass corrections and bottom Yukawa renormalizations.

Abstract

The Higgs sector of the minimal supersymmetric standard model (MSSM) consists of five physical Higgs bosons, which offer a variety of channels for their experimental search. The present study aims to further our understanding of the Tevatron reach for MSSM Higgs bosons, addressing relevant theoretical issues related to the SUSY parameter space, with special emphasis on the radiative corrections to the down--quark and lepton couplings to the Higgs bosons for large . We performed a computation of the signal and backgrounds for the production processes and at the upgraded Tevatron, with being the neutral MSSM Higgs bosons. Detailed experimental information and further higher order calculations are demanded to confirm/refine these predictions.

Paper Structure

This paper contains 14 sections, 30 equations, 15 figures.

Table of Contents

  1. Introduction
  2. Signals from $W\phi$ and $Z\phi$ Production
  3. $W(\to\ell\nu)\phi^{SM}(\to b\bar{b})$ signal and backgrounds
  4. Results on $Wh$ and $WH$
  5. Yukawa coupling effects in the large $\tan\beta$ regime.
  6. Higgs phenomenology with large $\tan\beta$ corrections.
  7. $W\phi$ process
  8. $b\bar{b}\phi$
  9. On the CP--even Higgs boson masses at large values of $\tan\beta$
  10. Simulation of $b\bar{b}(\phi\to b\bar{b})$ signal and backgrounds
  11. Results
  12. Simulation of $b\bar{b}\phi(\to\tau\tau)$ signal and backgrounds
  13. Constraints from the decay $b\rightarrow s \gamma$
  14. Conclusions

Figures (15)

  • Figure 1: 95% C.L. bound on $R=\frac{\sigma(p \bar{p} \to W \phi)}{\sigma(p \bar{p} \to W\phi^{SM})} \frac{B(\phi\to b\bar{b})}{B(\phi^{SM}\to b\bar{b})}$ as a function of the Higgs boson mass for the Tevatron and LEP2.
  • Figure 2: Same as Fig. 1 except for $5\sigma$ discovery.
  • Figure 3: $5\sigma$ discovery contours for the $W\phi(\to b\bar{b})$ mode at the Tevatron in the MSSM for maximal mixing, $\mu<0$, and $M_S$=1 TeV. Different shadings correspond to different integrated luminosities.
  • Figure 4: Same as Fig. 3 but with $\mu>0$.
  • Figure 5: Same as Fig. 3 but for minimal mixing.
  • ...and 10 more figures