<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>-violating phase in a two Higgs triplet scenario: Some phenomenological implications

Chaudhuri, Avinanda; Mukhopadhyaya, Biswarup

doi:10.1103/physrevd.93.093003

Cited by 9 publications

(9 citation statements)

References 66 publications

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“…Another decay channel that opens up in this scenario is Δ AEAE 1 → Δ AEAE 2 h, h being the SM-like Higgs. As has been shown in [45], this mode prevails especially in the presence of at least one CP-violating phase.…”

Section: Introductionsupporting

confidence: 59%

Distinctive collider signals for a two-Higgs-triplet model

Ghosh

Mukhopadhyaya

2019

Phys. Rev. D

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The extension of the standard model (SM) with two complex SUð2Þ L scalar triplets enables one to have the Type II seesaw mechanism operative consistently with texture-zero neutrino mass matrices. This framework predicts additional doubly charged, singly charged and neutral spinless states. We show that, for certain values of the model parameters, there is sufficient mass splitting between the two doubly charged states (H AEAE 1 ; H AEAE 2 ) that allows the decay H AEAE 1 → H AEAE 2 h, and thus leads to a unique signature of this scenario. We show that the final state 2ðl AE l AE Þ þ 4b þ = E T arising from this mode can be observed at the high energy, high luminosity (HE-HL) run of the 14 TeV Large Hadron Collider (LHC), and also at a 100 TeV Future Circular Collider (FCC-hh).

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Section: Introductionsupporting

confidence: 59%

Distinctive collider signals for a two-Higgs-triplet model

Ghosh

Mukhopadhyaya

2019

Phys. Rev. D

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“…Recent studies of two dimensional (2D) paramagnetic particles under one dimensional (1D) magnetic ratchets observed relation between overall dynamics and local particle coordination numbers [13].In colloidal suspensions, ratchet-like directed motion of particles have been achieved using suitable laser potentials [14,15]. Confinement and laser trapping in colloids, on the other hand, is known to give rise to interesting mechanical properties and phase transitions [27][28][29][30][31][32]. Coupling 2D interacting colloids to a 1D time-independent spatially periodic potential with periodicity commensurate with the mean particle separation, leads to the phenomena of laser induced freezing (LIF) and re-entrant melting with increase in the potential strength.…”

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confidence: 99%

Stochastic ratcheting of two-dimensional colloids: Directed current and dynamical transitions

Chakraborty

Chaudhuri

2015

Phys. Rev. E

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We present results of molecular dynamics simulations for two-dimensional repulsively interacting colloids driven by a one dimensional asymmetric and commensurate ratchet potential, switching on and off stochastically. This drives a time-averaged directed current of colloids, exhibiting resonance with change in ratcheting frequency, where the resonance frequency itself depends non-monotonically on density. Using scaling arguments, we obtain analytic results that show good agreement with numerical simulations. With increasing ratcheting frequency, we find non-equilibrium re-entrant transitions between solid and modulated liquid phases.PACS numbers: 05.40. Jc, 64.60.Cn A flashing ratchet refers to a time-averaged directed motion of Brownian particles under the influence of an spatially periodic and asymmetric potential, with the potential height varying with time, either deterministically or stochastically [1][2][3][4]. Stochastic ratcheting has been studied extensively, in the context of active dynamics of molecular motors [5][6][7][8], dynamics of colloidal dispersion in electrical [9][10][11], magnetic [12,13] or optical drive [14,15], as a mechanism of particle segregation [16][17][18], transport of cold atoms in optical lattice [19], and in the motion of flux quanta [20,21]. While a large body of work has been concentrated on the ratcheting of individual particles, fewer studies focused on the effects of interaction [22][23][24][25][26]. Recent studies of two dimensional (2D) paramagnetic particles under one dimensional (1D) magnetic ratchets observed relation between overall dynamics and local particle coordination numbers [13].In colloidal suspensions, ratchet-like directed motion of particles have been achieved using suitable laser potentials [14,15]. Confinement and laser trapping in colloids, on the other hand, is known to give rise to interesting mechanical properties and phase transitions [27][28][29][30][31][32]. Coupling 2D interacting colloids to a 1D time-independent spatially periodic potential with periodicity commensurate with the mean particle separation, leads to the phenomena of laser induced freezing (LIF) and re-entrant melting with increase in the potential strength. This was demonstrated in experiments using standing wave pattern of interfering laser beams [31,32], and was understood in terms of a dislocation unbinding theory [9,33].We consider transport of a 2D system of particles interacting via soft-core repulsion and driven by an 1D asymmetric flashing ratchet, using molecular dynamics (MD) simulations in the presence of a Langevin heat bath. The ratcheting potential breaks time-reversal symmetry and generates an average directed current along the direction of ratcheting ( Fig. 1(a)). We choose a periodicity of the potential commensurate with the inter particle separation. At switching frequencies much faster than the intrinsic relaxation times, the time scale required for particles to relax over a single valley of the external ratchet potential, the system experiences a time-averag...

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“…However, a single triplet fails to make Type II seesaw scenarios consistent with some widely used zero texture models, in particular, those with two-zero texture. On the contrary, such texture can be reproduced if one has two triplets instead of one, thereby suggesting a scenario whose phenomenological implications have been explored in recent works [55] and the collider signatures of this model have been studied in [56]. With this in mind, we analyze below models both with one and two scalar triplet in the light of the recent Higgs data and the contribution of charged scalar loops (including those from doubly charged scalars) embodied in dimension-6 operators.…”

Section: Higgs Triplet Modelsmentioning

confidence: 96%

“…The decay rates for h → γγ and h → Zγ in the two-triplet case are given by [55]. We have also discussed them in Appendix B.…”

Section: A Model With Two Tripletsmentioning

confidence: 99%

Extended scalar sectors, effective operators and observed data

Dey

Lahiri

Mukhopadhyaya

2018

J. High Energ. Phys.

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The available data on the 125 GeV scalar h is analysed to explore the room for new physics in the electroweak symmetry breaking sector. The first part of the study is model-independent, with h couplings to standard model particles scaled by quantities that are taken to be free parameters. At the same time, the additional loop contributions to h → γγ and h → Zγ, mediated by charged scalar contributions in the extended scalar sector, are treated in terms of gauge-invariant effective operators. Having justified this approach for cases where the concerned scalar masses are a little above the Z-boson mass, we fit the existing data to obtain marginalized 1σ and 2σ regions in the space of the coefficients of such effective operators, where the limit on the h → Zγ branching ratio is used as a constraint. The correlation between, say, the gluon fusion and vector-boson fusion channels, as reflected in a non-diagonal covariance matrix, is taken into account. After thus obtaining model-independent fits, the allowed values of the coefficients are translated into permissible regions of the parameter spaces of several specific models. In this spirit we constrain four different types of two Higgs doublet models, and also models with one or two Y = 2 scalar triplets, taking into account the correlatedness of the scale factors in h-interactions and the various couplings of charged Higgs states in each extended scenario.

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CP-violating phase in a two Higgs triplet scenario: Some phenomenological implications

Cited by 9 publications

References 66 publications

Distinctive collider signals for a two-Higgs-triplet model

Distinctive collider signals for a two-Higgs-triplet model

Stochastic ratcheting of two-dimensional colloids: Directed current and dynamical transitions

Extended scalar sectors, effective operators and observed data

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