Heavy charged scalars from cs¯ fusion: a generic search strategy applied to a 3HDM with U(1) × U(1) family symmetry

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Heavy charged scalars from cs¯ fusion : a generic search strategy applied to a 3HDM with U(1) × U(1) family symmetry. / Camargo-Molina, José Eliel; Mandal, Tanumoy; Pasechnik, Roman; Wessén, Jonas.

I: Journal of High Energy Physics, Vol. 2018, Nr. 3, 24, 01.03.2018.

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TY - JOUR

T1 - Heavy charged scalars from cs¯ fusion

T2 - Journal of High Energy Physics

AU - Camargo-Molina, José Eliel

AU - Mandal, Tanumoy

AU - Pasechnik, Roman

AU - Wessén, Jonas

PY - 2018/3/1

Y1 - 2018/3/1

N2 - We describe a class of three Higgs doublet models (3HDMs) with a softly broken U(1) × U(1) family symmetry that enforces a Cabibbo-like quark mixing while forbidding tree-level flavour changing neutral currents. The hierarchy in the observed quark masses is partly explained by a softer hierarchy in the vacuum expectation values of the three Higgs doublets. As a consequence, the physical scalar spectrum contains a Standard Model (SM) like Higgs boson h125 while exotic scalars couple the strongest to the second quark family, leading to rather unconventional discovery channels that could be probed at the Large Hadron Collider. In particular, we describe a search strategy for the lightest charged Higgs boson H±, through the process cs¯ → H+→ W+h125, using a multivariate analysis that leads to an excellent discriminatory power against the SM background. Although the analysis is applied to the proposed class of 3HDMs, we employ a model-independent formulation such that it can be applied to any other model with the same discovery channel.

AB - We describe a class of three Higgs doublet models (3HDMs) with a softly broken U(1) × U(1) family symmetry that enforces a Cabibbo-like quark mixing while forbidding tree-level flavour changing neutral currents. The hierarchy in the observed quark masses is partly explained by a softer hierarchy in the vacuum expectation values of the three Higgs doublets. As a consequence, the physical scalar spectrum contains a Standard Model (SM) like Higgs boson h125 while exotic scalars couple the strongest to the second quark family, leading to rather unconventional discovery channels that could be probed at the Large Hadron Collider. In particular, we describe a search strategy for the lightest charged Higgs boson H±, through the process cs¯ → H+→ W+h125, using a multivariate analysis that leads to an excellent discriminatory power against the SM background. Although the analysis is applied to the proposed class of 3HDMs, we employ a model-independent formulation such that it can be applied to any other model with the same discovery channel.

KW - Beyond Standard Model

KW - Higgs Physics

KW - Quark Masses and SM Parameters

UR - http://www.scopus.com/inward/record.url?scp=85043359982&partnerID=8YFLogxK

U2 - 10.1007/JHEP03(2018)024

DO - 10.1007/JHEP03(2018)024

M3 - Article

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 3

M1 - 24

ER -