TY - JOUR

T1 - Probing Higgs self-coupling of a classically scale invariant model in e+e− → Zhh

T2 - Evaluation at physical point

AU - Fujitani, Y.

AU - Sumino, Y.

PY - 2018/4/10

Y1 - 2018/4/10

N2 - A classically scale invariant extension of the standard model predicts large anomalous Higgs self-interactions. We compute missing contributions in previous studies for probing the Higgs triple coupling of a minimal model using the process e+e−→Zhh. Employing a proper order counting, we compute the total and differential cross sections at the leading order, which incorporate the one-loop corrections between zero external momenta and their physical values. Discovery/exclusion potential of a future e+e− collider for this model is estimated. We also find a unique feature in the momentum dependence of the Higgs triple vertex for this class of models.

AB - A classically scale invariant extension of the standard model predicts large anomalous Higgs self-interactions. We compute missing contributions in previous studies for probing the Higgs triple coupling of a minimal model using the process e+e−→Zhh. Employing a proper order counting, we compute the total and differential cross sections at the leading order, which incorporate the one-loop corrections between zero external momenta and their physical values. Discovery/exclusion potential of a future e+e− collider for this model is estimated. We also find a unique feature in the momentum dependence of the Higgs triple vertex for this class of models.

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U2 - 10.1016/j.physletb.2018.01.067

DO - 10.1016/j.physletb.2018.01.067

M3 - Article

AN - SCOPUS:85044671524

VL - 779

SP - 46

EP - 51

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -