Entity
UAM. Departamento de Física Teórica
Citation
Journal Of High Energy Physics (2019): 1-36
Funded by
We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and atother CMS institutes for their contributions to the success of the CMS effort. In addition,we gratefully acknowledge the computing centers and personnel of the Worldwide LHCComputing Grid for delivering so effectively the computing infrastructure essential to ouranalyses. Finally, we acknowledge the enduring support for the construction and operationof the LHC and the CMS detector provided by the following funding agencies: BMBWFand FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS,and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador);MoER, ERC IUT, PUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT(Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN(Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE andUM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico);MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland);FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia);MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); SwissFunding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA(Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (UnitedKingdom); DOE and NSF (U.S.A.).Individuals have received support from the Marie-Curie program and the EuropeanResearch Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander vonHumboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation `a la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschapvoor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS andFWO (Belgium) under the “Excellence of Science — EOS” — be.h project n. 30820817;the Beijing Municipal Science & Technology Commission, No. Z181100004218003; theMinistry of Education, Youth and Sports (MEYS) of the Czech Republic; the Lendület(“Momentum”) Program and the J´anos Bolyai Research Scholarship of the HungarianAcademy of Sciences, the New National Excellence Program UNKP, the NKFIA research ´grants 123842, 123959, 124845, 124850, 125105, 128713, 128786, and 129058 (Hungary);the Council of Science and Industrial Research, India; the HOMING PLUS program ofthe Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus program of the Ministry of Science and Higher Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428,Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonatabis 2012/07/E/ST2/01406; the National Priorities Research Program by Qatar NationalResearch Fund; the Ministry of Science and Education, grant no. 3.2989.2017 (Russia); thePrograma Estatal de Fomento de la Investigación Científica y Técnica de Excelencia Maríade Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; theRachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and theChulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand);the Welch Foundation, contract C-1845; and the Weston Havens Foundation (U.S.A.).
Project
info:eu-repo/grantAgreement/EU/H2020/675440; info:eu-repo/grantAgreement/EU/H2020/752730; info:eu-repo/grantAgreement/EU/H2020/765710; Gobierno de España. MDM-2015-0509
Editor's Version
https://doi.org/10.1007/JHEP10(2019)139
Subjects
Beyond Standard Model; Hadron-Hadron scattering (experiments); Photon production; Física
Note
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si lo hubiere, y los autores pertenecientes a la UAM
Abstract
A search is presented for a Higgs boson that is produced in association witha Z boson and that decays to an undetected particle together with an isolated photon.The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb−1recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)%at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon
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