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Direct constraints on the top-Higgs coupling from the 8 TeV LHC data

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Abstract

The LHC experiments have analyzed the 7 and 8 TeV LHC data in the main Higgs production and decay modes. Current analyses only loosely constrain an anomalous top-Higgs coupling in a direct way. In order to strongly constrain this coupling, the Higgs-top associated production is reanalyzed. Thanks to the large destructive interference in the t-channel for standard model couplings, this process can be very sensitive to both the magnitude and the sign of a non-standard top-Higgs coupling. We project the sensitivity to anomalous couplings to the integrated luminosity of 50 fb−1, corresponding to the data collected by the ATLAS and CMS experiments in 7 and 8 TeV collisions, as of 2012. We show that the combination of diphoton and multi-lepton signatures, originating from different combinations of the top and Higgs decay modes, can be a potential probe to constrain a large portion of the negative top-Higgs coupling space presently allowed by the ATLAS and CMS global fits.

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Authors and Affiliations

  1. INFN, Sezione di Roma, c/o Dipart. di Fisica, Università di Roma “La Sapienza”, P.le Aldo Moro 2, I-00185, Rome, Italy

    Sanjoy Biswas, Fabrizio Margaroli & Barbara Mele

  2. NICPB, Ravala 10, Tallinn, 10143, Estonia

    Emidio Gabrielli

  3. INFN, Sezione di Trieste, Via Valerio 2, I-34127, Trieste, Italy

    Emidio Gabrielli

  4. Dipart. di Fisica, Università di Roma “La Sapienza”, P.le Aldo Moro 2, I-00185, Rome, Italy

    Fabrizio Margaroli

Authors
  1. Sanjoy Biswas
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  2. Emidio Gabrielli
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  3. Fabrizio Margaroli
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  4. Barbara Mele
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Corresponding author

Correspondence to Barbara Mele.

Additional information

ArXiv ePrint: 1304.1822

On leave of absence from Dipart. di Fisica, Università di Trieste, Strada Costiera 11, I-34151 Trieste, Italy. (Emidio Gabrielli)

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Biswas, S., Gabrielli, E., Margaroli, F. et al. Direct constraints on the top-Higgs coupling from the 8 TeV LHC data. J. High Energ. Phys. 2013, 73 (2013). https://doi.org/10.1007/JHEP07(2013)073

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  • DOI: https://doi.org/10.1007/JHEP07(2013)073

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