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title: A search for the standard model Higgs boson decaying to charm quarks
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Introduction
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The discovery of a Higgs boson, , with the CERN LHC data collected in 2010–2012 by both the ATLAS [@Aad:2012tfa] and CMS [@Chatrchyan:2012xdj; @Chatrchyan2013] experiments in 2012 represented a major step toward the characterization of the electroweak symmetry breaking mechanism [@PhysRevLett.13.321; @PhysRevLett.13.508; @PhysRevLett.13.585]. The mass of this particle is measured to be ${m_{\PH}}\sim 125$ [@Aad:2015zhl; @Sirunyan:2017exp; @Aaboud:2019lxo] and its decays in the $\PGg\PGg$, $\PZ\PZ$, $\PW\PW$, and $\PGt\PGt$ modes have been observed [@Aad:2014eha; @Khachatryan:1728107; @Aad:2014eva; @Chatrchyan:2013mxa; @ATLAS:2014aga; @Aad:2015ona; @Chatrchyan:1633401; @Aad:2015vsa; @Chatrchyan:1643937; @Sirunyan:2273798; @Sirunyan:2018egh]. All measured properties so far [@Sirunyan:2017exp; @Sirunyan:2019twz; @Sirunyan:2018koj; @Aad:2015gba; @Khachatryan:2014jba; @Chatrchyan:2012jja; @Aad:2013xqa; @Khachatryan:2016vau; @Aad:2015zhl; @Sirunyan:2017exp; @Aaboud:2018ezd; @Aaboud:2018wps] indicate that, within the measurement uncertainties, this new particle is consistent with the expectations of the standard model (SM). Nevertheless, there remains much to be learned about the properties of this new particle. One of the highest priorities of the LHC physics program is the measurement of the couplings of the boson to other SM particles. Recently both ATLAS and CMS Collaborations reported the first direct measurements of the boson couplings to third-generation quarks ( and ) [@Sirunyan:2018hoz; @Aaboud:2018urx; @Sirunyan:2018kst; 