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.
Arhrib, Abdesslam
f70919b7-51ed-4211-9033-6ffa9b7127ce
Jueid, Adil
621bb28f-0045-4d7e-af15-d6afa79b8b1b
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
5 December 2018
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), [115006].
(doi:10.1103/PhysRevD.98.115006).
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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Top quark polarization
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Published date: 5 December 2018
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Local EPrints ID: 427485
URI: http://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: 16 Mar 2024 03:35
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Author:
Abdesslam Arhrib
Author:
Adil Jueid
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