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Analysis of the quark sector in the 2HDM-III with a four-zero Yukawa texture using the most recent data on the CKM matrix

Analysis of the quark sector in the 2HDM-III with a four-zero Yukawa texture using the most recent data on the CKM matrix
Analysis of the quark sector in the 2HDM-III with a four-zero Yukawa texture using the most recent data on the CKM matrix
In this letter we analyse, in the context of the general 2-Higgs Doublet Model, the structure of the Yukawa matrices, $\widetilde{ \bf Y}_{ _{1,2} }^{q}$, by assuming a four-zero texture ansatz for their definition. In this framework, we obtain compact expressions for $\widetilde{ \bf Y}_{ _{1,2} }^{q}$, which are reduced to the Cheng and Sher ansatz with the difference that they are obtained naturally as a direct consequence of the invariants of the fermion mass matrices. Furthermore, in order to avoid large flavour violating effects coming from charged Higgs exchange, we consider the main flavour constraints on the off-diagonal terms of Yukawa texture {{$\left( \widetilde{\chi}_{j}^q \right)_{kl}$}} ($k\neq l$). We perform a $\chi^2$-fit based on current experimental data on the quark masses and the Cabibbo-Kobayashi-Maskawa mixing matrix ${ \bf V}_{\rm CKM }$. Hence, we obtain the allowed ranges for the parameters $\widetilde{ \bf Y}_{ _{1,2} }^{q}$ at 1$\sigma$ for several values of $\tan \beta$. The results are in complete agreement with the bounds obtained taking into account constraints on Flavour Changing Neutral Currents reported in the literature.
hep-ph
0370-2693
347-352
Félix-Beltrán, O.
083db077-a386-4aa3-a643-21ecf1915cf2
González-Canales, F.
bf8e83e4-06f7-43eb-ab2e-8c4b6170722d
Hernández-Sánchez, J.
949d6d0b-c5e3-4fae-a99c-818b6da1361b
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Noriega-Papaqui, R.
45b4385e-1018-4431-8fd2-4f1bffbc70bd
Rosado, A.
72e02cc9-ced1-4662-b23d-902e987f26aa
Félix-Beltrán, O.
083db077-a386-4aa3-a643-21ecf1915cf2
González-Canales, F.
bf8e83e4-06f7-43eb-ab2e-8c4b6170722d
Hernández-Sánchez, J.
949d6d0b-c5e3-4fae-a99c-818b6da1361b
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Noriega-Papaqui, R.
45b4385e-1018-4431-8fd2-4f1bffbc70bd
Rosado, A.
72e02cc9-ced1-4662-b23d-902e987f26aa

Félix-Beltrán, O., González-Canales, F., Hernández-Sánchez, J., Moretti, S., Noriega-Papaqui, R. and Rosado, A. (2015) Analysis of the quark sector in the 2HDM-III with a four-zero Yukawa texture using the most recent data on the CKM matrix. Physics Letters B, 742, 347-352. (doi:10.1016/j.physletb.2015.02.003).

Record type: Article

Abstract

In this letter we analyse, in the context of the general 2-Higgs Doublet Model, the structure of the Yukawa matrices, $\widetilde{ \bf Y}_{ _{1,2} }^{q}$, by assuming a four-zero texture ansatz for their definition. In this framework, we obtain compact expressions for $\widetilde{ \bf Y}_{ _{1,2} }^{q}$, which are reduced to the Cheng and Sher ansatz with the difference that they are obtained naturally as a direct consequence of the invariants of the fermion mass matrices. Furthermore, in order to avoid large flavour violating effects coming from charged Higgs exchange, we consider the main flavour constraints on the off-diagonal terms of Yukawa texture {{$\left( \widetilde{\chi}_{j}^q \right)_{kl}$}} ($k\neq l$). We perform a $\chi^2$-fit based on current experimental data on the quark masses and the Cabibbo-Kobayashi-Maskawa mixing matrix ${ \bf V}_{\rm CKM }$. Hence, we obtain the allowed ranges for the parameters $\widetilde{ \bf Y}_{ _{1,2} }^{q}$ at 1$\sigma$ for several values of $\tan \beta$. The results are in complete agreement with the bounds obtained taking into account constraints on Flavour Changing Neutral Currents reported in the literature.

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More information

Accepted/In Press date: 2 February 2015
e-pub ahead of print date: 4 February 2015
Published date: 6 March 2015
Additional Information: 12 pages, 1 figure. Version accepted in Phys. Lett. B
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 411970
URI: http://eprints.soton.ac.uk/id/eprint/411970
ISSN: 0370-2693
PURE UUID: 15560f7b-ef03-4ff4-a09f-ad36f2ffa015

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Date deposited: 03 Jul 2017 16:31
Last modified: 13 Mar 2019 19:43

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