Abstract
Evidence is reported for electroweak (EW) vector boson scattering in the decay channel ℓνqq of two weak vector bosons WV (V=W or Z), produced in association with two parton jets. The search uses a data set of proton-proton collisions at 13 TeV collected with the CMS detector during 2016–2018 with an integrated luminosity of 138fb−1. Events are selected requiring one lepton (electron or muon), moderate missing transverse momentum, two jets with a large pseudorapidity separation and a large dijet invariant mass, and a signature consistent with the hadronic decay of a W/Z boson. The cross section is computed in a fiducial phase space defined at parton level requiring all parton transverse momenta pT>10GeV and at least one pair of outgoing partons with invariant mass mqq>100GeV. The measured and expected EW WV production cross sections are 1.90−0.46+0.53 pb and 2.23−0.11+0.08(scale)±0.05(PDF) pb, respectively, where PDF is the parton distribution function. The observed EW signal strength is μEW=0.85±0.12(stat)−0.17+0.19(syst), corresponding to a signal significance of 4.4 standard deviations with 5.1 expected, and it is measured keeping the quantum chromodynamics (QCD) associated diboson production fixed to the standard model prediction. This is the first evidence of vector boson scattering in the ℓνqq decay channel at LHC. The simultaneous measurement of the EW and QCD associated diboson production agrees with the standard model prediction.
Original language | English |
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Article number | 137438 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 834 |
DOIs | |
Publication status | Published - 10 Nov 2022 |
Bibliographical note
Publisher Copyright:© 2022 The Author(s)
Funding
Individuals have received support from the Marie-Curie Program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440 , 724704 , 752730 , 758316 , 765710 , 824093 , 884104 , and COST Action CA16108 (European Union); the Leventis Foundation ; the Alfred 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 F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science – EOS” – be.h project n. 30820817 ; the Beijing Municipal Science & Technology Commission , No. Z191100007219010 ; The Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG), under Germany's Excellence Strategy – EXC 2121 “Quantum Universe” – 390833306 , and under project number 400140256 - GRK2497; the Lendület (“Momentum”) Prog ram and the János Bolyai Research Scholarship of the Hungarian Academy of Sciences , the New National Excellence Program ÚNKP , the NKFIA research grants 123842 , 123959 , 124845 , 124850 , 125105 , 128713 , 128786 , and 129058 (Hungary); the Council of Science and Industrial Research , India; the Latvian Council of Science ; the Ministry of Science and Higher Education and the National Science Center , contracts Opus 2014/15/B/ST2/03998 and 2015/19/B/ST2/02861 (Poland); the Fundação para a Ciência e a Tecnologia , grant CEECIND/01334/2018 (Portugal); the National Priorities Research Program by Qatar National Research Fund ; the Ministry of Science and Higher Education , projects no. 14.W03.31.0026 and no. FSWW-2020-0008 , and the Russian Foundation for Basic Research , project No. 19-42-703014 (Russia); MCIN/AEI/10.13039/501100011033, ERDF “a way of making Europe”, and the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu , grant MDM-2017-0765 and Programa Severo Ochoa del Principado de Asturias (Spain); the Stavros Niarchos Foundation (Greece); the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Kavli Foundation ; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation , contract C-1845 ; and the Weston Havens Foundation (USA).
Funders | Funder number |
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Excellence of Science | 30820817 |
Marie-Curie Program | |
Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu | MDM-2017-0765 |
Programa Severo Ochoa del Principado de Asturias | |
Alfred P. Sloan Foundation | |
Welch Foundation | C-1845 |
Kavli Foundation | |
Alexander von Humboldt-Stiftung | |
NVIDIA | |
Qatar National Research Fund | FSWW-2020-0008 |
Ministry of Education and Science | |
Weston Havens Foundation | |
European Research Council | |
European Cooperation in Science and Technology | CA16108 |
Council of Scientific and Industrial Research, India | |
Deutsche Forschungsgemeinschaft | 390833306, 400140256 - GRK2497 |
Ministerstvo Školství, Mládeže a Tělovýchovy | |
Fundação para a Ciência e a Tecnologia | CEECIND/01334/2018 |
Russian Foundation for Basic Research | MCIN/AEI/10.13039/501100011033, 19-42-703014 |
Fonds De La Recherche Scientifique - FNRS | |
Belgian Federal Science Policy Office | |
Chulalongkorn University | |
Fonds Wetenschappelijk Onderzoek | |
Agentschap voor Innovatie door Wetenschap en Technologie | |
Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture | |
Magyar Tudományos Akadémia | |
A.G. Leventis Foundation | |
Narodowe Centrum Nauki | 2014/15/B/ST2/03998, 2015/19/B/ST2/02861 |
Stavros Niarchos Foundation | |
Latvijas Zinātnes Padome | |
Horizon 2020 | 724704, 758316, 824093, 675440, 752730, 765710, 884104 |
European Regional Development Fund | |
Beijing Municipal Science and Technology Commission | Z191100007219010 |
Nemzeti Kutatási, Fejlesztési és Innovaciós Alap | 124845, 123842, 129058, 125105, 124850, 128786, 128713, 123959 |
Keywords
- CMS
- Vector boson scattering