Abstract
Results are presented from a search for production of Higgs boson pairs (HH) where one boson decays to a pair of b quarks and the other to a τ lepton pair. This work is based on proton-proton collision data collected by the CMS experiment at s=8 TeV, corresponding to an integrated luminosity of 18.3 fb-1. Resonant and nonresonant modes of HH production have been probed and no significant excess relative to the background-only hypotheses has been found in either mode. Upper limits on cross sections of the two HH production modes have been set. The results have been combined with previously published searches at s=8 TeV, in decay modes to two photons and two b quarks, as well as to four b quarks, which also show no evidence for a signal. Limits from the combination have been set on resonant HH production by an unknown particle X in the mass range mX=300 GeV to mX=1000 GeV. For resonant production of spin 0 (spin 2) particles, the observed 95% CL upper limit is 1.13 pb (1.09 pb) at mX=300 GeV and to 21 fb (18 fb) at mX=1000 GeV. For nonresonant HH production, a limit of 43 times the rate predicted by the standard model has been set.
| Original language | English |
|---|---|
| Article number | 072004 |
| Journal | Physical Review D |
| Volume | 96 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 20 Oct 2017 |
Bibliographical note
Publisher Copyright:© 2017 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Funding
FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, Contract No. 675440 (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS program of the 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, Sonata-bis 2012/07/E/ST2/ 01406; the National Priorities Research Program by Qatar National Research Fund; the Programa Clarín-COFUND del Principado de Asturias; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); and the Welch Foundation, Contract No. C-1845.
| Funders | Funder number |
|---|---|
| EU-ESF | |
| STAR | |
| National Science Foundation | 1606321, 1151640, 1506168, 1506130, 1624356, 1508869 |
| U.S. Department of Energy | |
| Alfred P. Sloan Foundation | |
| Welch Foundation | C-1845 |
| Alexander von Humboldt-Stiftung | |
| Qatar National Research Fund | |
| Ministry of Education and Science | |
| Direktion für Entwicklung und Zusammenarbeit | |
| Türkiye Atom Enerjisi Kurumu | |
| Thailand Center of Excellence in Physics | |
| Institute for the Promotion of Teaching Science and Technology | |
| Science and Technology Facilities Council | PP/E000479/1, GRIDPP, ST/H000925/1 |
| European Commission | |
| European Research Council | |
| Council of Scientific and Industrial Research, India | |
| Ministerstvo Školství, Mládeže a Tělovýchovy | |
| Fundacja na rzecz Nauki Polskiej | |
| Belgian Federal Science Policy Office | |
| Chulalongkorn University | |
| Federación Española de Enfermedades Raras | |
| Agentschap voor Innovatie door Wetenschap en Technologie | |
| Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture | |
| A.G. Leventis Foundation | |
| National Science and Technology Development Agency | Thailand |
| Narodowe Centrum Nauki | 2014/15/B/ST2/03998, 2015/19/B/ST2/02861, 2014/14/M/ST2/00428, 2012/07/E/ST2/ 01406, 2014/13/B/ST2/02543 |
| Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | |
| Ministry of Science and Technology, Taiwan | |
| National Academy of Sciences of Ukraine | |
| Horizon 2020 | 675440 |
| European Regional Development Fund | |
| State Fund for Fundamental Research of Ukraine |