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Z? production at the LHC in the four-site Higgsless model

Z? production at the LHC in the four-site Higgsless model
Z? production at the LHC in the four-site Higgsless model
We study the phenomenology of the neutral gauge sector of the four-site Higgsless model, based on the SU(2)L×SU(2)1×SU(2)2×U(1)Y gauge symmetry, at present colliders. The model predicts the existence of two neutral and four charged extra gauge bosons, Z1,2 and W1,2±. We expand and update a previous study, by concentrating on the neutral sector. We derive new limits on Z1,2-boson masses and couplings from recent direct searches at the Tevatron. We moreover estimate the discovery potential at the Tevatron with a project luminosity L=10??fb-1, and at the 7 TeV LHC with L=1??fb-1. In contrast to other Higgsless theories characterized by almost fermiophobic extra gauge bosons, the four-site model allows sizable Z1,2-boson couplings to standard model fermions. Owing to this feature, we find that in the next 2 years the extra Z1,2 bosons could be discovered in the favored Drell-Yan channel at the 7 TeV LHC for Z1,2 masses in the TeV region, depending on model parameters.

1550-7998
015012-[19pp]
Accomando, Elena
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
De Curtis, Stefania
7bf1f7cf-535f-4551-8d05-806c57cfa2d1
Dominici, Daniele
aca95683-a4dd-4521-ab76-e132b61c6c58
Fedeli, Luca
1ddd6a40-9ad1-4453-9eda-b2122d20878b
Accomando, Elena
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
De Curtis, Stefania
7bf1f7cf-535f-4551-8d05-806c57cfa2d1
Dominici, Daniele
aca95683-a4dd-4521-ab76-e132b61c6c58
Fedeli, Luca
1ddd6a40-9ad1-4453-9eda-b2122d20878b

Accomando, Elena, De Curtis, Stefania, Dominici, Daniele and Fedeli, Luca (2011) Z? production at the LHC in the four-site Higgsless model. Physical Review D, 83 (1), 015012-[19pp]. (doi:10.1103/PhysRevD.83.015012).

Record type: Article

Abstract

We study the phenomenology of the neutral gauge sector of the four-site Higgsless model, based on the SU(2)L×SU(2)1×SU(2)2×U(1)Y gauge symmetry, at present colliders. The model predicts the existence of two neutral and four charged extra gauge bosons, Z1,2 and W1,2±. We expand and update a previous study, by concentrating on the neutral sector. We derive new limits on Z1,2-boson masses and couplings from recent direct searches at the Tevatron. We moreover estimate the discovery potential at the Tevatron with a project luminosity L=10??fb-1, and at the 7 TeV LHC with L=1??fb-1. In contrast to other Higgsless theories characterized by almost fermiophobic extra gauge bosons, the four-site model allows sizable Z1,2-boson couplings to standard model fermions. Owing to this feature, we find that in the next 2 years the extra Z1,2 bosons could be discovered in the favored Drell-Yan channel at the 7 TeV LHC for Z1,2 masses in the TeV region, depending on model parameters.

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Published date: January 2011

Identifiers

Local EPrints ID: 193505
URI: https://eprints.soton.ac.uk/id/eprint/193505
ISSN: 1550-7998
PURE UUID: 03055e25-5f2d-47ed-bccd-527e4ba7563b

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Date deposited: 14 Jul 2011 15:17
Last modified: 18 Jul 2017 11:28

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Contributors

Author: Elena Accomando
Author: Stefania De Curtis
Author: Daniele Dominici
Author: Luca Fedeli

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