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Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC

The CP-violating MSSM allows existence of a light neutral Higgs boson ($M_{H_1} \lapp 50$ GeV) in the CPX scenario in the low $\tan \beta (\lapp 5)$ region, which could have escaped the LEP searches due to a strongly suppressed $H_1 Z Z$ coupling. This parameter space corresponds to a relatively lig...

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Detalles Bibliográficos
Autores principales: Ghosh, Dilip Kumar, Godbole, R.M., Roy, D.P.
Lenguaje:eng
Publicado: 2004
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2005.08.132
http://cds.cern.ch/record/810871
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author Ghosh, Dilip Kumar
Godbole, R.M.
Roy, D.P.
author_facet Ghosh, Dilip Kumar
Godbole, R.M.
Roy, D.P.
author_sort Ghosh, Dilip Kumar
collection CERN
description The CP-violating MSSM allows existence of a light neutral Higgs boson ($M_{H_1} \lapp 50$ GeV) in the CPX scenario in the low $\tan \beta (\lapp 5)$ region, which could have escaped the LEP searches due to a strongly suppressed $H_1 Z Z$ coupling. This parameter space corresponds to a relatively light $H^\pm$ ($M_{H^\pm} < M_t$), which is predicted to decay dominantly into the $W H_1$ channel. Thus one expects to see a striking $t \bar t$ signal at the LHC, where one of the top quarks decays into the $bb \bar b W$ channel, via $t \to b H^\pm, H^\pm \to W H_1$ and $H_1 \to b \bar b$. The characteristic correlation between the $b \bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks is expected to make this signal practically free of the SM background. Our parton level Monte Carlo simulation yields upto 4500 events, for ${\cal L} = 30$ fb$^{-1}$, over the parameter space of interest, after taking into account the b-tagging efficiency for three or more b-tagged jets.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-8108712023-03-14T18:16:15Zdoi:10.1016/j.physletb.2005.08.132http://cds.cern.ch/record/810871engGhosh, Dilip KumarGodbole, R.M.Roy, D.P.Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHCParticle Physics - PhenomenologyThe CP-violating MSSM allows existence of a light neutral Higgs boson ($M_{H_1} \lapp 50$ GeV) in the CPX scenario in the low $\tan \beta (\lapp 5)$ region, which could have escaped the LEP searches due to a strongly suppressed $H_1 Z Z$ coupling. This parameter space corresponds to a relatively light $H^\pm$ ($M_{H^\pm} < M_t$), which is predicted to decay dominantly into the $W H_1$ channel. Thus one expects to see a striking $t \bar t$ signal at the LHC, where one of the top quarks decays into the $bb \bar b W$ channel, via $t \to b H^\pm, H^\pm \to W H_1$ and $H_1 \to b \bar b$. The characteristic correlation between the $b \bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks is expected to make this signal practically free of the SM background. Our parton level Monte Carlo simulation yields upto 4500 events, for ${\cal L} = 30$ fb$^{-1}$, over the parameter space of interest, after taking into account the b-tagging efficiency for three or more b-tagged jets.The CP-violating MSSM allows existence of a light neutral Higgs boson ($M_{H_1} \lapp 50$ GeV) in the CPX scenario in the low $\tan \beta (\lapp 5)$ region, which could have escaped the LEP searches due to a strongly suppressed $H_1 Z Z$ coupling. This parameter space corresponds to a relatively light $H^\pm$ ($M_{H^\pm} < M_t$), which is predicted to decay dominantly into the $W H_1$ channel. Thus one expects to see a striking $t \bar t$ signal at the LHC, where one of the top quarks decays into the $bb \bar b W$ channel, via $t \to b H^\pm, H^\pm \to W H_1$ and $H_1 \to b \bar b$. The characteristic correlation between the $b \bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks is expected to make this signal practically free of the SM background. Our parton level Monte Carlo simulation yields upto 5000 events, for ${\cal L} = 30$ fb$^{-1}$, over the parameter space of interest, after taking into account the b-tagging efficiency for three or more b-tagged jets.The CP-violating MSSM allows existence of a light neutral Higgs boson ( MH1≲50 GeV ) in the CPX scenario in the low tanβ(≲5) region, which could have escaped the LEP searches due to a strongly suppressed H1ZZ coupling. This parameter space corresponds to a relatively light H+ ( MH+<Mt ), which is predicted to decay dominantly into the WH1 channel. Thus one expects to see a striking tt¯ signal at the LHC, where one of the top quarks decays into the bbb¯W channel, via t→bH± , H±→WH1 and H1→bb¯ . The characteristic correlation between the bb¯ , bb¯W and bbb¯W invariant mass peaks is expected to make this signal practically free of the SM background. Our parton level Monte Carlo simulation yields upto 5000 events, for L=30 fb−1 , over the parameter space of interest, after taking into account the b -tagging efficiency for three or more b -tagged jets.hep-ph/0412193IISC-CHEP-15-04CERN-PH-TH-2004-250WUE-ITP-2004-037CERN-TH-2004-250-[SIC!]CERN-PH-TH-2004-250IISC-CHEP-2004-15WUE-ITP-2004-037oai:cds.cern.ch:8108712004-12-14
spellingShingle Particle Physics - Phenomenology
Ghosh, Dilip Kumar
Godbole, R.M.
Roy, D.P.
Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title_full Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title_fullStr Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title_full_unstemmed Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title_short Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC
title_sort probing the cp-violating light neutral higgs in the charged higgs decay at the lhc
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2005.08.132
http://cds.cern.ch/record/810871
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