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Measuring Higgs CP and couplings with hadronic event shapes

Experimental falsification or validation of the Standard Model of Particle Physics involves the measurement of the CPCP \mathcal{C}\mathcal{P} quantum number and couplings of the Higgs boson. Both Atlas and Cms have reported an SM Higgs-like excess around m H = 125 GeV. In this mass range the CPCP \...

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Bibliographic Details
Main Authors: Englert, Christoph (Author) , Spannowsky, Michael (Author) , Takeuchi, Michihisa (Author)
Format: Article (Journal)
Language:English
Published: June 19, 2012
In: Journal of high energy physics
Year: 2012, Issue: 6
ISSN:1029-8479
DOI:10.1007/JHEP06(2012)108
Online Access:Verlag, Volltext: http://dx.doi.org/10.1007/JHEP06(2012)108
Verlag, Volltext: https://doi.org/10.1007/JHEP06(2012)108
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Author Notes:Christoph Englert, Michael Spannowsky and Michihisa Takeuchi
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Summary:Experimental falsification or validation of the Standard Model of Particle Physics involves the measurement of the CPCP \mathcal{C}\mathcal{P} quantum number and couplings of the Higgs boson. Both Atlas and Cms have reported an SM Higgs-like excess around m H = 125 GeV. In this mass range the CPCP \mathcal{C}\mathcal{P} properties of the Higgs boson can be extracted from an analysis of the azimuthal angle distribution of the two jets in pp → H jj events. This channel is also important to measure the couplings of the Higgs boson to electroweak gauge bosons and fermions, hereby establishing the exceptional role of the Higgs boson in the Standard Model. Instead of exploiting the jet angular correlation, we show that hadronic event shapes exhibit substantial discriminative power to separate a CPCP \mathcal{C}\mathcal{P} even from a CPCP \mathcal{C}\mathcal{P} odd Higgs. Some event shapes even show an increased sensitivity to the Higgs CPCP \mathcal{C}\mathcal{P} compared to the azimuthal angle correlation. Constraining the Higgs couplings via a separation of the weak boson fusion and the gluon fusion Higgs production modes can be achieved applying similar strategies.
Item Description:Im Titel ist CP ist kursiv dargestellt
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Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP06(2012)108

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