Study the effect of beam energy spread and detector resolution on the search for Higgs boson decays to invisible particles at a future ee circular collider

Olmo Cerri; Michele de Gruttola; Maurizio Pierini; Alessandro Podo; Gigi Rolandi

doi:10.1140/epjc/s10052-017-4680-5

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2022 Impact factor 4.4

Particles and Fields

Open Access

Eur. Phys. J. C (2017) 77: 116
https://doi.org/10.1140/epjc/s10052-017-4680-5

Special Article - Tools for Experiment and Theory

Study the effect of beam energy spread and detector resolution on the search for Higgs boson decays to invisible particles at a future ee circular collider

Olmo Cerri¹, Michele de Gruttola²^*, Maurizio Pierini², Alessandro Podo¹ and Gigi Rolandi¹^,2

¹ Scuola Normale Superiore, Pisa, Italy
² CERN, Geneva, Switzerland

^* e-mail: michele.de.gruttola@cern.ch

Received: 9 June 2016
Accepted: 3 February 2017
Published online: 18 February 2017

Abstract

We study the expected sensitivity to measure the branching ratio of Higgs boson decays to invisible particles at a future circular collider (FCC-ee) in the process with ( or ) using an integrated luminosity of 3.5 ab at a center-of-mass energy GeV. The impact of the energy spread of the FCC-ee beam and of the resolution in the reconstruction of the leptons is discussed. The minimum branching ratio for a observation after 3.5 ab of data taking is . The branching ratio exclusion limit at 95% CL is .