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Top quark polarization as a probe of charged Higgs bosons

Top quark polarization as a probe of charged Higgs bosons
Top quark polarization as a probe of charged Higgs bosons

We study the production and decay of a heavy charged Higgs boson in the bg→tH- and H-→bt processes at the Large Hadron Collider (LHC). We show that the chiral structure of the H-tb vertex entering both stages is sensitive to the underlying Higgs mechanism of electroweak symmetry breaking (EWSB) and we specifically demonstrate that one could distinguish between two popular realizations of a 2-Higgs doublet model (2HDM) embedding a new H± state, i.e., those with Type-I and -Y Yukawa couplings. The chiral structure of such a vertex, which is different in the two cases, in turn triggers a particular spin state of the top quark which is then transmitted to its decay products. Hence, both inclusive rates and exclusive observables can be used to extract the presence of such a charged Higgs boson state in LHC data.

2470-0010
Arhrib, Abdesslam
f70919b7-51ed-4211-9033-6ffa9b7127ce
Jueid, Adil
621bb28f-0045-4d7e-af15-d6afa79b8b1b
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Arhrib, Abdesslam
f70919b7-51ed-4211-9033-6ffa9b7127ce
Jueid, Adil
621bb28f-0045-4d7e-af15-d6afa79b8b1b
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614

Arhrib, Abdesslam, Jueid, Adil and Moretti, Stefano (2018) Top quark polarization as a probe of charged Higgs bosons. Physical Review D, 98 (11). (doi:10.1103/PhysRevD.98.115006).

Record type: Article

Abstract

We study the production and decay of a heavy charged Higgs boson in the bg→tH- and H-→bt processes at the Large Hadron Collider (LHC). We show that the chiral structure of the H-tb vertex entering both stages is sensitive to the underlying Higgs mechanism of electroweak symmetry breaking (EWSB) and we specifically demonstrate that one could distinguish between two popular realizations of a 2-Higgs doublet model (2HDM) embedding a new H± state, i.e., those with Type-I and -Y Yukawa couplings. The chiral structure of such a vertex, which is different in the two cases, in turn triggers a particular spin state of the top quark which is then transmitted to its decay products. Hence, both inclusive rates and exclusive observables can be used to extract the presence of such a charged Higgs boson state in LHC data.

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Published date: 5 December 2018

Identifiers

Local EPrints ID: 427485
URI: https://eprints.soton.ac.uk/id/eprint/427485
ISSN: 2470-0010
PURE UUID: 44675644-b1e0-44bd-adef-fb5a9a3b7fbf

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Date deposited: 21 Jan 2019 17:30
Last modified: 13 Mar 2019 17:38

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Contributors

Author: Abdesslam Arhrib
Author: Adil Jueid
Author: Stefano Moretti

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