1,992 research outputs found

    Improving the discovery potential of charged Higgs bosons at Tevatron Run 2

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    By exploiting the full process ppˉtbˉHp\bar p\to t\bar b H^-, in place of the standard Monte Carlo procedure of factorising production and decay, ppˉttˉp\bar p\to t\bar t followed by tˉbˉH\bar t\to\bar b H^-, we show how to improve the discovery reach of the Tevatron (Run 2) in charged Higgs boson searches, in the large tanβ\tan\beta region. This is achieved in conjunction with dedicated cuts on a `transverse mass' distribution sensitive to the Higgs boson mass and to `polarisation' effects in the HτνˉτH^-\to\tau^-\bar\nu_\tau decay channel.Comment: 12 pages, LaTeX, 5 figures (one figure added, discussion slightly changed: version to appear in JHEP

    Event-shape selection cuts for supersymmetry searches at the LHC with 7 TeV energy

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    We investigate the prospects of supersymmetry searches at the LHC with 7 TeV energy. A new set of selection cuts is proposed based on event shapes to control backgrounds. Our preliminary studies show that it is possible to minimize backgrounds to a significantly low level and conservative estimate suggests that the mass reach can be extended to \sim 1.1 TeV for luminosity 1/fb with a reasonable signal-to-background ratio.Comment: 5 pages, 2 figures, title changed, typos are corrected, text is edited, reference added, conclusion remains unchanged, to be published in PR

    Detection prospects of light pseudoscalar Higgs boson at the LHC

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    The discovery potential of light pseudo scalar Higgs boson for the mass range 10-60 GeV is explored. In the context of the next-to-minimal supersymmetric standard(NMSSM) model, the branching fraction of light pseudo scalar Higgs boson decaying to a pair of photon can be quite large. A pair of light pseudo scalar Higgs boson produced indirectly through the standard model Higgs boson decay yields multiple photons in the final state and the corresponding production rate is restricted by ATLAS data. Discussing the impact of this constraint in the NMSSM, the detection prospects of light pseudoscalar Higgs boson in the channel consisting of at least three photons, a lepton and missing transverse energy are reported. It is observed that the possibilities of finding the pseudoscalar Higgs boson for the above mass range are promising for an integrated luminosity L=100fb1\mathcal{L}=100 \text{fb}^{-1} with moderate significances, which can reach to more than 5σ\sigma for higher luminosity options.Comment: 24 pages, 4 figures, updated reference