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Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model

Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model
Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model
We study the production of top-antitop pairs at the Large Hadron Collider as a testbed for discovering heavy Z' bosons belonging to a composite Higgs model, as, in this scenario, such new gauge interaction states are sizeably coupled to the third generation quarks of the Standard Model. We study their possible appearance in cross section as well as (charge and spin) asymmetry distributions. Our calculations are performed in the minimal four-dimensional formulation of such a scenario, namely the 4-Dimensional Composite Higgs Model (4DCHM), which embeds five new Z's. We pay particular attention to the case of nearly degenerate resonances, highlighting the conditions under which these are separable in the aforementioned observables. We also discuss the impact of the intrinsic width of the new resonances onto the event rates and various distributions. We confirm that the 14 TeV stage of the LHC will enable one to detect two such states, assuming standard detector performance and machine luminosity. A mapping of the discovery potential of the LHC of these new gauge bosons is given. Finally, from the latter, several benchmarks are extracted which are amenable to experimental investigation.
1-30
Barducci, D.
bdea7d87-a3aa-4fbc-8705-ee80582fe14d
De Curtis, S.
f18d9632-8911-4f37-896f-fb2018eef4fb
Mimasu, K.
f0cdbb9b-7730-419d-976f-98801e86f63e
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Barducci, D.
bdea7d87-a3aa-4fbc-8705-ee80582fe14d
De Curtis, S.
f18d9632-8911-4f37-896f-fb2018eef4fb
Mimasu, K.
f0cdbb9b-7730-419d-976f-98801e86f63e
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614

Barducci, D., De Curtis, S., Mimasu, K. and Moretti, S. (2012) Multiple Z' -> t-tbar signals in a 4D Composite Higgs Model. Pre-print, arXiv:1212.59 (SHEP-12-41), 1-30.

Record type: Article

Abstract

We study the production of top-antitop pairs at the Large Hadron Collider as a testbed for discovering heavy Z' bosons belonging to a composite Higgs model, as, in this scenario, such new gauge interaction states are sizeably coupled to the third generation quarks of the Standard Model. We study their possible appearance in cross section as well as (charge and spin) asymmetry distributions. Our calculations are performed in the minimal four-dimensional formulation of such a scenario, namely the 4-Dimensional Composite Higgs Model (4DCHM), which embeds five new Z's. We pay particular attention to the case of nearly degenerate resonances, highlighting the conditions under which these are separable in the aforementioned observables. We also discuss the impact of the intrinsic width of the new resonances onto the event rates and various distributions. We confirm that the 14 TeV stage of the LHC will enable one to detect two such states, assuming standard detector performance and machine luminosity. A mapping of the discovery potential of the LHC of these new gauge bosons is given. Finally, from the latter, several benchmarks are extracted which are amenable to experimental investigation.

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e-pub ahead of print date: 2012
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 356667
URI: https://eprints.soton.ac.uk/id/eprint/356667
PURE UUID: e3f6ea0d-5233-4c62-8f12-f757829bd956

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Date deposited: 10 Oct 2013 11:48
Last modified: 04 Dec 2018 17:35

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