Nothing Special   »   [go: up one dir, main page]

CERN Accelerating science

Article
Report number arXiv:1505.01168 ; CERN-PH-TH-2015-106 ; LPT-ORSAY-15-32 ; CERN-PH-TH-2015-106
Title Golden probe of the top Yukuwa coupling
Author(s) Chen, Yi (Caltech) ; Stolarski, Daniel (CERN) ; Vega-Morales, Roberto (Orsay, LPT)
Publication 2015-09-14
Imprint 05 May 2015
Number of pages 11
Note references and footnote added
In: Phys. Rev. D 92 (2015) 053003
DOI 10.1103/PhysRevD.92.053003
Subject category Particle Physics - Phenomenology
Abstract We perform a preliminary study of the ability of the Higgs decay to four leptons to shed light on the top quark Yukawa couplings. In particular we examine whether the $h\to 4\ell$ `golden channel' is sensitive to the $CP$ properties of the top quark couplings to the Higgs boson. We show that kinematic distributions are sensitive to interference of the next-to-leading order electroweak corrections with the tree level $ZZ$ contribution. This translates into a sensitivity to the top quark Yukawa couplings such that meaningful constraints on their $CP$ properties can begin to be obtained once $\sim 300$ fb$^{-1}$ of data has been collected at $\sim 14$ TeV, with significant improvements at higher luminosity or with a higher energy hadron collider. This makes the $h\to4\ell$ channel a useful probe of the top quark Yukawa couplings that is qualitatively different from already established searches in $h\to V\gamma$ two body decays, $tth$, and $gg\to h$. We also briefly discuss other potential possibilities for probing the top Yukawa $CP$ properties in $h\to2\ell\gamma$ and $\ell^+\ell^-\to h Z, h\gamma$.
Copyright/License arXiv nonexclusive-distrib. 1.0
preprint: © 2015-2024 CERN (License: CC-BY-4.0)
publication: © 2015-2024 The Author(s) (License: CC-BY-3.0)



Corresponding record in: Inspire


 Registro creado el 2015-05-07, última modificación el 2022-08-10


APS Open Access article:
Descargar el texto completoPDF
Texto completo:
Descargar el texto completoPDF
Enlace externo:
Descargar el texto completoPreprint