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Phenomenology of 2HDM with vectorlike quarks

Phenomenology of 2HDM with vectorlike quarks
Phenomenology of 2HDM with vectorlike quarks

In this paper, we examine the consistency of the Large Hadron Collider (LHC) data collected during Runs 1 and 2 by the ATLAS and CMS experiments with the predictions of a 2-Higgs doublet model embedding vectorlike quarks (VLQs) for pp→H, A production and H, A→γγ decay mechanisms, respectively, of (nearly) degenerate CP-even (H) and CP-odd (A) Higgs bosons. We show that a scenario containing one single VLQ with electromagnetic charge 2/3 can explain the above ATLAS and CMS data for masses in the region 350 GeV≤mVLQ≤1.5 TeV or so, depending on tanβ, and for several values of the mixing angle between the top quark (t) and its VLQ counterpart (T). We then perform a global fit onto the model by including all relevant experimental as well as theoretical constraints. The surviving samples of our analysis are discussed within 2σ of the LHC measurements. Additionally, we also comment on the recent anomalous result reported by CMS using Run 2 data on the associated Standard Model Higgs boson production with top quark pairs pp→tth with an observed significance of 3.3σ. Other than these specific examples, we also present a phenomenological analysis of the main features of the model, including the most promising T decay channels.

2470-0010
1-15
Arhrib, A.
e247c66d-0830-4da1-8ad4-d05fb05776a3
Benbrik, R.
90bba75a-4e29-4d13-b589-6dd38568f787
King, S. J.D.
2e855764-14d3-4bdb-b0d9-e0659b969a3b
Manaut, B.
aead1e80-433c-4e66-bc8c-1db780d50481
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Un, C. S.
25af457e-6050-4ff9-95fa-15a4cef053a4
Arhrib, A.
e247c66d-0830-4da1-8ad4-d05fb05776a3
Benbrik, R.
90bba75a-4e29-4d13-b589-6dd38568f787
King, S. J.D.
2e855764-14d3-4bdb-b0d9-e0659b969a3b
Manaut, B.
aead1e80-433c-4e66-bc8c-1db780d50481
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Un, C. S.
25af457e-6050-4ff9-95fa-15a4cef053a4

Arhrib, A., Benbrik, R., King, S. J.D., Manaut, B., Moretti, S. and Un, C. S. (2018) Phenomenology of 2HDM with vectorlike quarks. Physical Review D, 97 (9), 1-15. (doi:10.1103/PhysRevD.97.095015).

Record type: Article

Abstract

In this paper, we examine the consistency of the Large Hadron Collider (LHC) data collected during Runs 1 and 2 by the ATLAS and CMS experiments with the predictions of a 2-Higgs doublet model embedding vectorlike quarks (VLQs) for pp→H, A production and H, A→γγ decay mechanisms, respectively, of (nearly) degenerate CP-even (H) and CP-odd (A) Higgs bosons. We show that a scenario containing one single VLQ with electromagnetic charge 2/3 can explain the above ATLAS and CMS data for masses in the region 350 GeV≤mVLQ≤1.5 TeV or so, depending on tanβ, and for several values of the mixing angle between the top quark (t) and its VLQ counterpart (T). We then perform a global fit onto the model by including all relevant experimental as well as theoretical constraints. The surviving samples of our analysis are discussed within 2σ of the LHC measurements. Additionally, we also comment on the recent anomalous result reported by CMS using Run 2 data on the associated Standard Model Higgs boson production with top quark pairs pp→tth with an observed significance of 3.3σ. Other than these specific examples, we also present a phenomenological analysis of the main features of the model, including the most promising T decay channels.

Text
PhysRevD.97.095015
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e-pub ahead of print date: 1 May 2018
Published date: 15 May 2018

Identifiers

Local EPrints ID: 421800
URI: https://eprints.soton.ac.uk/id/eprint/421800
ISSN: 2470-0010
PURE UUID: 9775a271-0b58-44ed-babc-9eb697b47853

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Date deposited: 28 Jun 2018 16:30
Last modified: 13 Mar 2019 18:19

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