2022 Impact factor 4.4
Particles and Fields

Eur. Phys. J. C 22, 411-421 (2001)
DOI: 10.1007/s100520100817

$\mathcal{CP}$ odd anomalous interactions of Higgs boson in its production at photon colliders

I.F. Ginzburg1, 2 and I.P. Ivanov1, 2, 3

1  Institute of Mathematics, Novosibirsk, Russia
2  Novosibirsk State University Novosibirsk, Russia
3  IKP, Forschungszentrum Jülich, 52405 Jülich, Germany

(Received: 22 January 2001 / Published online: 23 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )

We discuss the potentialities of the study of ${\cal C}{\cal P}$ odd interactions of the Higgs boson with photons via its production at $\gamma\gamma$ and $e\gamma$ colliders. Our treatment of $H\gamma\gamma$ and $HZ\gamma$ anomalous interactions includes a set of free parameters, whose impact on physical observables has not been considered before. We focus on two reactions, $\gamma\gamma
\to H$ and $e\gamma\to e H$, and introduce the polarization and/or azimuthal asymmetries that are particularly sensitive to specific features of the anomalies. We discuss the ways of disentangling the effects of physically different parameters of the anomalies and estimate what the magnitude of ${\cal C}{\cal P}$ violating phenomena is that can be seen in these experiments.

© Società Italiana di Fisica, Springer-Verlag 2001