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dc.contributor.author
Mileo, Nicolás Ismael
dc.contributor.author
Kiers, Ken
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Szynkman, Alejandro Andrés
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Crane, Daniel
dc.contributor.author
Gegner, Ethan
dc.date.available
2019-02-27T18:00:18Z
dc.date.issued
2016-07
dc.identifier.citation
Mileo, Nicolás Ismael; Kiers, Ken; Szynkman, Alejandro Andrés; Crane, Daniel; Gegner, Ethan; Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity; Springer; Journal of High Energy Physics; 2016; 7; 7-2016
dc.identifier.issn
1029-8479
dc.identifier.uri
http://hdl.handle.net/11336/70905
dc.description.abstract
We present a collection of CP-odd observables for the process pp→t(→bℓ+νℓ)t¯(→b¯ℓ−ν¯ℓ)H that are linearly dependent on the scalar (kt) and pseudoscalar (k˜ t) top-Higgs coupling and hence sensitive to the corresponding relative sign. The proposed observables are based on triple product (TP) correlations that we extract from the expression for the differential cross section in terms of the spin vectors of the top and antitop quarks. In order to explore other possibilities, we progressively modify these TPs, first by combining them, and then by replacing the spin vectors by the lepton momenta or the t and t¯ momenta by their visible parts. We generate Monte Carlo data sets for several benchmark scenarios, including the Standard Model (kt=1,k˜t=0) and two scenarios with mixed CP properties (kt=1,k˜t=±1). Assuming an integrated luminosity that is consistent with that envisioned for the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking into account only statistical uncertainties, we find that the most promising observable can disentangle the “CP-mixed” scenarios with an effective separation of ∼ 19σ. In the case of observables that do not require the reconstruction of the t and t momenta, the power of discrimination is up to ∼ 13σ for the same number of events. We also show that the most promising observables can still disentangle the CP-mixed scenarios when the number of events is reduced to values consistent with expectations for the Large Hadron Collider in the near term.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Higgs
dc.subject
Top
dc.subject
Lhc
dc.subject.classification
Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Pseudoscalar top-Higgs coupling: exploration of CP-odd observables to resolve the sign ambiguity
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-02-12T14:50:32Z
dc.journal.volume
2016
dc.journal.number
7
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Mileo, Nicolás Ismael. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Kiers, Ken. Taylor University; Estados Unidos
dc.description.fil
Fil: Szynkman, Alejandro Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.description.fil
Fil: Crane, Daniel. Taylor University; Estados Unidos
dc.description.fil
Fil: Gegner, Ethan. Taylor University; Estados Unidos
dc.journal.title
Journal of High Energy Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/JHEP07(2016)056
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2FJHEP07%282016%29056
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