The Search of Anomalous Higgs Boson Couplings at the Large Hadron Electron Collider and Future Circular Electron Hadron Collider

The Higgs boson was discovered by the ATLAS
and CMS experimental groups in 2012 at the Large Hadron
Collider (LHC). Production and decay properties of the Higgs
boson, Standard Model (SM) couplings, and limits on effective
scale of the Higgs boson’s couplings with other bosons are
investigated at particle colliders. Deviations from SM estimates are
parametrized by effective Lagrangian terms to investigate Higgs
couplings. This is a model-independent method for describing the
new physics. In this study, sensitivity to neutral gauge boson
anomalous couplings with the Higgs boson is investigated using
the parameters of the Large Hadron electron Collider (LHeC)
and the Future Circular electron-hadron Collider (FCC-eh) with
a model-independent approach. By using MadGraph5_aMC@NLO
multi-purpose event generator with the parameters of LHeC and
FCC-eh, the bounds on the anomalous Hγγ, HγZ and HZZ couplings
in e− p → e− q H process are obtained. Detector simulations are
also taken into account in the calculations.




References:
[1] G. Aad et al., “Observation of a new particle in the search for the
Standard Model Higgs boson with the ATLAS detector at the LHC,”
Phys. Lett., vol. B716, pp. 1–29, 2012.
[2] S. Chatrchyan et al., “Observation of a new boson at a mass of 125
GeV with the CMS experiment at the LHC,” Phys. Lett., vol. B716,
pp. 30–61, 2012.
[3] J. R. Andersen et al., “Handbook of LHC Higgs Cross Sections: 3.
Higgs Properties,” 2013.
[4] W. Buchmuller and D. Wyler, “Effective Lagrangian Analysis of
New Interactions and Flavor Conservation,” Nucl. Phys., vol. B268,
pp. 621–653, 1986.
[5] K. Hagiwara, R. Szalapski, and D. Zeppenfeld, “Anomalous Higgs boson
production and decay,” Phys. Lett., vol. B318, pp. 155–162, 1993.
[6] G. F. Giudice, C. Grojean, A. Pomarol, and R. Rattazzi, “The
Strongly-Interacting Light Higgs,” JHEP, vol. 06, p. 045, 2007.
[7] B. Grzadkowski, M. Iskrzynski, M. Misiak, and J. Rosiek,
“Dimension-Six Terms in the Standard Model Lagrangian,” JHEP,
vol. 10, p. 085, 2010.
[8] R. Contino, M. Ghezzi, C. Grojean, M. Muhlleitner, and M. Spira,
“Effective Lagrangian for a light Higgs-like scalar,” JHEP, vol. 07,
p. 035, 2013.
[9] J. L. Abelleira Fernandez et al., “A Large Hadron Electron Collider at
CERN: Report on the Physics and Design Concepts for Machine and
Detector,” J. Phys., vol. G39, p. 075001, 2012.
[10] O. Bruning, J. Jowett, M. Klein, D. Pellegrini, D. Schulte, and
F. Zimmermann, “Future Circular Collider Study FCC-he Baseline
Parameters,” Tech. Rep. CERN-ACC-2017-0019, CERN, Geneva, Apr
2017.
[11] A. Alloul, B. Fuks, and V. Sanz, “Phenomenology of the Higgs Effective
Lagrangian via FEYNRULES,” JHEP, vol. 04, p. 110, 2014.
[12] J. Alwall, R. Frederix, S. Frixione, V. Hirschi, F. Maltoni, O. Mattelaer,
H. S. Shao, T. Stelzer, P. Torrielli, and M. Zaro, “The automated
computation of tree-level and next-to-leading order differential cross
sections, and their matching to parton shower simulations,” JHEP,
vol. 07, p. 079, 2014. [13] C. Degrande, C. Duhr, B. Fuks, D. Grellscheid, O. Mattelaer, and
T. Reiter, “UFO - The Universal FeynRules Output,” Comput. Phys.
Commun., vol. 183, pp. 1201–1214, 2012.
[14] A. Alloul, N. D. Christensen, C. Degrande, C. Duhr, and B. Fuks,
“FeynRules 2.0 - A complete toolbox for tree-level phenomenology,”
Comput. Phys. Commun., vol. 185, pp. 2250–2300, 2014.
[15] T. Sjostrand, S. Mrenna, and P. Z. Skands, “PYTHIA 6.4 Physics and
Manual,” JHEP, vol. 05, p. 026, 2006.
[16] M. Selvaggi, “DELPHES 3: A modular framework for fast-simulation of
generic collider experiments,” J. Phys. Conf. Ser., vol. 523, p. 012033,
2014.
[17] C. Englert, R. Kogler, H. Schulz, and M. Spannowsky, “Higgs coupling
measurements at the LHC,” Eur. Phys. J., vol. C76, no. 7, p. 393, 2016.
[18] G. Aad et al., “Constraints on non-Standard Model Higgs boson
interactions in an effective Lagrangian using differential cross sections
measured in the H → γγ decay channel at
√s = 8TeV with the
ATLAS detector,” Phys. Lett., vol. B753, pp. 69–85, 2016.