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I. Boiarska, K. Bondarenko, A. Boyarsky, V. Gorkavenko, M. Ovchynnikov and A. Sokolenko, Phenomenology of GeV-scale scalar portal, JHEP 1911
Original
1904
Earlier work this paper cites.
Y. S. Amhis et al
Original
1909
Earlier work this paper cites.
A. Filimonova, R. Schäfer and S. Westhoff, Probing dark sectors with long-lived particles at Belle II, arXiv:1911.03490 [hep-ph]
Original
1911
Earlier work this paper cites.
F. J. Botella and C. S. Lim, Flavor Changing Yukawa Coupling in the Standard Model and Muon Polarization in 𝐊 𝐋 → 𝛍 𝛍 ¯ K_{L}\to\mu\bar{\mu} , Phys. Rev. Lett. 56
1986
Earlier work this paper cites.
M. B. Voloshin, Once Again About the Role of Gluonic Mechanism in Interaction of Light Higgs Boson with Hadrons, Sov. J. Nucl. Phys. 44
1986
Earlier work this paper cites.
B. Grinstein, L. J. Hall and L. Randall, Do B meson decays exclude a light Higgs?, Phys. Lett. B 211
1988
Earlier work this paper cites.
T. N. Truong and R. S. Willey, Branching Ratios for Decays of Light Higgs Bosons, Phys. Rev. D 40
1989
Earlier work this paper cites.
J. F. Donoghue, J. Gasser and H. Leutwyler, The Decay of a Light Higgs Boson, Nucl. Phys. B 343
1990
Earlier work this paper cites.
R. Mertig, M. Bohm and A. Denner, FEYN CALC: Computer algebraic calculation of Feynman amplitudes, Comput. Phys. Commun. 64
1991
Earlier work this paper cites.
T. Hahn, Generating Feynman diagrams and amplitudes with FeynArts 3, Comput. Phys. Commun. 140
2001
Earlier work this paper cites.
V. Shtabovenko, R. Mertig and F. Orellana, FeynCalc 9.3: New features and improvements, arXiv:2001.04407 [hep-ph]
Original
2001
Earlier work this paper cites.
R. M. Schabinger and J. D. Wells, A Minimal spontaneously broken hidden sector and its impact on Higgs boson physics at the large hadron collider, Phys. Rev. D 72
2005
Earlier work this paper cites.

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2020

Higgs portal to dark matter and $B\to K^{(*)}$ decays

Kachanovich, Aliaksei, Nierste, Ulrich, Nišandžić, Ivan

Understand

We consider a Higgs portal model in which the 125-GeV Higgs boson mixes with a light singlet mediator $h_2$ coupling to particles of a Dark Sector and study potential $b\to s h_2$ decays in the Belle II experiment.

Multiplying the gauge-dependent off-shell Standard-Model $b$-$s$-Higgs vertex with the sine of the Higgs mixing angle does not give the correct $b$-$s$-$h_2$ vertex.
We clarify this issue by calculating the $b$-$s$-$h_2$ vertex in an arbitrary $R_\xi$ gauge and demonstrate how the $\xi$ dependence cancels from physical decay rates involving an on-shell or off-shell $h_2$.
Then we revisit the $b\to s h_2$ phenomenology and point out that a simultaneous study of $B\to K^* h_2$ and $B\to K h_2$ helps to discriminate between the Higgs portal and alternative models of the Dark Sector.

Built on

I. Boiarska, K. Bondarenko, A. Boyarsky, V. Gorkavenko, M. Ovchynnikov and A. Sokolenko, Phenomenology of GeV-scale scalar portal, JHEP 1911
Original
1904
Earlier work this paper cites.
Y. S. Amhis et al
Original
1909
Earlier work this paper cites.
A. Filimonova, R. Schäfer and S. Westhoff, Probing dark sectors with long-lived particles at Belle II, arXiv:1911.03490 [hep-ph]
Original
1911
Earlier work this paper cites.
F. J. Botella and C. S. Lim, Flavor Changing Yukawa Coupling in the Standard Model and Muon Polarization in 𝐊 𝐋 → 𝛍 𝛍 ¯ K_{L}\to\mu\bar{\mu} , Phys. Rev. Lett. 56
1986
Earlier work this paper cites.
M. B. Voloshin, Once Again About the Role of Gluonic Mechanism in Interaction of Light Higgs Boson with Hadrons, Sov. J. Nucl. Phys. 44
1986
Earlier work this paper cites.
B. Grinstein, L. J. Hall and L. Randall, Do B meson decays exclude a light Higgs?, Phys. Lett. B 211
1988
Earlier work this paper cites.
T. N. Truong and R. S. Willey, Branching Ratios for Decays of Light Higgs Bosons, Phys. Rev. D 40
1989
Earlier work this paper cites.
J. F. Donoghue, J. Gasser and H. Leutwyler, The Decay of a Light Higgs Boson, Nucl. Phys. B 343
1990
Earlier work this paper cites.
R. Mertig, M. Bohm and A. Denner, FEYN CALC: Computer algebraic calculation of Feynman amplitudes, Comput. Phys. Commun. 64
1991
Earlier work this paper cites.
T. Hahn, Generating Feynman diagrams and amplitudes with FeynArts 3, Comput. Phys. Commun. 140
2001
Earlier work this paper cites.
V. Shtabovenko, R. Mertig and F. Orellana, FeynCalc 9.3: New features and improvements, arXiv:2001.04407 [hep-ph]
Original
2001
Earlier work this paper cites.
R. M. Schabinger and J. D. Wells, A Minimal spontaneously broken hidden sector and its impact on Higgs boson physics at the large hadron collider, Phys. Rev. D 72
2005
Earlier work this paper cites.