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.

N1 - Funding Information:
The authors are grateful to H. Yokoya for useful advices for the simulation studies. The works of Y.F. and Y.S. are supported in part by Graduate Program on Physics for the Universe (GP-PU), Tohoku University , and by Grant-in-Aid for scientific research (No. 17K05404 ) from MEXT , Japan, respectively.
Publisher Copyright:
© 2018 The Authors

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

SN - 0370-2693

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

ER -