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Title: Indirect searches of the degenerate MSSM

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Related Information: CHORUS Timestamp: 2017-04-20 22:12:55; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Chowdhury, Debtosh, Patel, Ketan M., Tata, Xerxes, and Vempati, Sudhir K. Indirect searches of the degenerate MSSM. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.075025.
Chowdhury, Debtosh, Patel, Ketan M., Tata, Xerxes, & Vempati, Sudhir K. Indirect searches of the degenerate MSSM. United States. doi:10.1103/PhysRevD.95.075025.
Chowdhury, Debtosh, Patel, Ketan M., Tata, Xerxes, and Vempati, Sudhir K. 2017. "Indirect searches of the degenerate MSSM". United States. doi:10.1103/PhysRevD.95.075025.
title = {Indirect searches of the degenerate MSSM},
author = {Chowdhury, Debtosh and Patel, Ketan M. and Tata, Xerxes and Vempati, Sudhir K.},
abstractNote = {},
doi = {10.1103/PhysRevD.95.075025},
journal = {Physical Review D},
number = 7,
volume = 95,
place = {United States},
year = 2017,
month = 4

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 20, 2018
Publisher's Accepted Manuscript

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  • Searches for the Minimal Supersymmetric Standard Model (MSSM) Higgs bosons are among the most promising channels for exploring new physics at the Tevatron. In particular, interesting regions of large tan {beta} and small m{sub A} are probed by searches for heavy neutral Higgs bosons, A and H, when they decay to {tau}{sup +}{tau}{sup -} and b{bar b}. At the same time, direct searches for dark matter, such as CDMS, attempt to observe neutralino dark matter particles scattering elastically off nuclei. This can occur through t-channel Higgs exchange, which has a large cross section in the case of large tan {beta}more » and small m{sub A}. As a result, there is a natural interplay between the heavy, neutral Higgs searches at the Tevatron and the region of parameter space explored by CDMS. We show that if the lightest neutralino makes up the dark matter of our universe, current limits from CDMS strongly constrain the prospects of heavy, neutral MSSM Higgs discovery at the Tevatron (at 3{sigma} with 4 fb{sup -1} per experiment) unless |{mu}| {approx}> 400 GeV. The limits of CDMS projected for 2007 will increase this constraint to |{mu}| {approx}> 800 GeV. On the other hand, if CDMS does observe neutralino dark matter in the near future, it will make the discovery of heavy, neutral MSSM Higgs bosons far more likely at the Tevatron.« less
  • We present the next-to-leading strong interaction corrections to the DELTAF = 2 Hamiltonian in the MSSM with exact diagonalization of the squark mass matrices. These results allow phenomenological studies of neutral meson mixing in scenarios with non-degenerate squarks, with control over the renormalization scale and scheme dependence.
  • The Higgs boson search has shifted from LEP2 to the Tevatron and will subsequently move to the LHC. The current limits from the Tevatron and the prospective sensitivities at the LHC are often interpreted in specific MSSM scenarios. For heavy Higgs boson production and subsequent decay into b{bar b} or {tau}{sup +}{tau}{sup -}, the present Tevatron data allow to set limits in the M{sub A}-tan {beta} plane for small M{sub A} and large tan {beta} values. Similar channels have been explored for the LHC, where the discovery reach extends to higher values of M{sub A} and smaller tan {beta}. Searchesmore » for MSSM charged Higgs bosons, produced in top decays or in association with top quarks, have also been investigated at the Tevatron and the LHC. We analyze the current Tevatron limits and prospective LHC sensitivities. We discuss how robust they are with respect to variations of the other MSSM parameters and possible improvements of the theoretical predictions for Higgs boson production and decay. It is shown that the inclusion of supersymmetric radiative corrections to the production cross sections and decay widths leads to important modifications of the present limits on the MSSM parameter space. The impact on the region where only the lightest MSSM Higgs boson can be detected at the LHC is also analyzed. We propose to extend the existing benchmark scenarios by including additional values of the higgsino mass parameter {mu}. This affects only slightly the search channels for a SM-like Higgs boson, while having a major impact on the searches for non-standard MSSM Higgs bosons.« less
  • In a variety of supersymmetric extensions of the Standard Model, the scalar partners of the quarks and leptons are predicted to be very heavy and beyond the reach of next-generation colliders. For instance, the realization of electroweak baryogenesis in supersymmetry requires new sources of CP-violation, which can only be naturally accommodated with electric dipole moment constraints if the first and second generation scalar fermions are beyond the TeV scale. Also in focus-point supersymmetry and split supersymmetry the scalar fermions are very heavy. In this work, the phenomenology of scenarios with electroweak baryogenesis and in the focus point region at themore » LHC and ILC is studied, which becomes challenging due to the presence of heavy scalar fermions. Implications for the analysis of baryogenesis and dark matter are deduced. It is found that precision measurements of superpartner properties allow an accurate determination of the dark matter relic density in both scenarios, while important but only incomplete information about the baryogenesis mechanism can be obtained.« less
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