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  • Publication . Other literature type . Article . Research . Preprint . 2021
    Open Access
    Authors: 
    Fruehwirth, Rudolf; Wulz, Claudia-Elisabeth; Melo da Costa, Eliza; Brandao Malbouisson, Helena; Tomei, Thiago; de Moraes Gregores, Eduardo; de Souza Lemos, Dener; Garcia Fuentes, Francisco Ignacio; Agram, Jean-Laurent; Brom, Jean-Marie; +279 more
    Countries: Italy, Finland, Croatia, Croatia, United Kingdom, United Kingdom, Italy, Belgium, Belgium, Turkey ...
    Project: EC | AMVA4NewPhysics (675440), EC | INSIGHTS (765710), EC | LHCTOPVLQ (752730), EC | AMVA4NewPhysics (675440), EC | INSIGHTS (765710), EC | LHCTOPVLQ (752730)

    Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D0 mesons produced in pp and pPb collisions are presented. Nonprompt D0 mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2–6 GeV. Compared at similar event multiplicities, the prompt D0 meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D0 mesons in pPb collisions. For pT in the range of 2–5 GeV, the results suggest that v2 for nonprompt D0 mesons is smaller than that for prompt D0 mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems. Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); CERN; the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS Collaboration: et al. Funded by SCOAP3. Peer reviewed

  • Publication . Article . Preprint . Other literature type . Research . Report . 2018
    Open Access English
    Authors: 
    Ece Aşılar; Marko Dragicevic; A. Escalante Del Valle; Jochen Schieck; Daniel Spitzbart; Claudia-Elisabeth Wulz; E. A. De Wolf; H. Van Haevermaet; N. Van Remortel; Freya Blekman; +429 more
    Publisher: Springer Nature
    Countries: Belgium, United States, United States, Germany, Belgium, Italy, Turkey, India, Spain, Italy ...
    Project: EC | AMVA4NewPhysics (675440), EC | AMVA4NewPhysics (675440)

    A search for charged Higgs boson decaying to a charm and a bottom quark ( $ {\mathrm{H}}^{+}\to \mathrm{c}\overline{\mathrm{b}} $ ) is performed using 19.7 fb$^{−1}$ of pp collision data at $ \sqrt{s}=8 $ TeV. The production mechanism investigated in this search is $ \mathrm{t}\overline{\mathrm{t}} $ pair production in which one top quark decays to a charged Higgs boson and a bottom quark and the other decays to a charged lepton, a neutrino, and a bottom quark. Charged Higgs boson decays to $ \mathrm{c}\overline{\mathrm{b}} $ are searched for, resulting in a final state containing at least four jets, a charged lepton (muon or electron), and missing transverse momentum. A kinematic fit is performed to identify the pair of jets least likely to be the bottom quarks originating from direct top quark decays and the invariant mass of this pair is used as the final observable in the search. No evidence for the presence of a charged Higgs boson is observed and upper limits at 95% confidence level of 0.8–0.5% are set on the branching fraction ℬ(t → H$^{+}$b), assuming ℬ(H$^{+}$ → $ \mathrm{c}\overline{\mathrm{b}} $ ) = 1.0 and ℬ(t → H$^{+}$b) + ℬ(t → Wb) = 1.0, for the charged Higgs boson mass range 90–150 GeV. Journal of high energy physics 1811(11), 115 (2018). doi:10.1007/JHEP11(2018)115 Published by Springer Nature, Cham

  • Publication . Article . Other literature type . Research . Preprint . 2020
    Open Access English
    Authors: 
    Valerie Domcke; Marco Drewes; Marco Hufnagel; Michele Lucente;
    Countries: Switzerland, Germany
    Project: EC | NewAve (638528)

    We study the type-I seesaw model with three right-handed neutrinos and Majorana masses below the pion mass. In this mass range, the model parameter space is not only strongly constrained by the requirement to explain the light neutrino masses, but also by experimental searches and cosmological considerations. In the existing literature, three disjoint regions of potentially viable parameter space have been identified. In one of them, all heavy neutrinos decay shortly before big bang nucleosynthesis. In the other two regions, one of the heavy neutrinos either decays between BBN and the CMB decoupling or is quasi-stable. We show that previously unaccounted constraints from photodisintegration of nuclei practically rule out all relevant decays that happen between BBN and the CMB decoupling. Quite remarkably, if all heavy neutrinos decay before BBN, the baryon asymmetry of the universe can be quite generically explained by low-scale leptogenesis, i.e. without further tuning in addition to what is needed to avoid experimental and cosmological constraints. This motivates searches for heavy neutrinos in pion decay experiments. Journal of high energy physics 01(1), 200 (2021). doi:10.1007/JHEP01(2021)200 Published by SISSA, [Trieste]

  • Publication . Article . Other literature type . Research . Preprint . 2021
    Open Access English
    Authors: 
    Ayse Polatoz; Vinicius Massami Mikuni; Basile Vermassen; Willard Johns; Sinan Sagir; Jennifer Chu; Soureek Mitra; Mircho Rodozov; Ram Krishna Dewanjee; Daniele Fasanella; +554 more
    Publisher: Springer
    Countries: Belgium, Spain, Germany, Germany, United Kingdom, Serbia, Belgium, Belgium, Spain, Germany ...
    Project: EC | AMVA4NewPhysics (675440), EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440), EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710)

    Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at s√ = 13 TeV, corresponding to an integrated luminosity of 137 fb−1, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at s√ = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb−1, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is 1.19+0.40−0.39(stat)+0.15−0.14(syst). This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date. Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS collaboration: et al. Peer reviewed

  • Open Access English
    Authors: 
    Georges Aad; Brad Abbott; A. Abed Abud; Kira Abeling; Syed Haider Abidi; Halina Abramowicz; Baida Achkar; Lennart Adam; C. Adam Bourdarios; Leszek Adamczyk; +1,425 more
    Publisher: SpringerOpen
    Countries: Italy, Italy, United Kingdom, United Kingdom, United Kingdom, United Kingdom, United Kingdom, Netherlands, Netherlands, Argentina ...
    Project: EC | LightAtLHC (864950), EC | LightAtLHC (864950)

    We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRT, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; JINR; MES of Russia and NRC KI, Russian Federation; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada, CRC and IVADO, Canada; Beijing Municipal Science & Technology Commission, China; COST, ERC, ERDF, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. This paper describes a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC. The study uses 2.2 nb(-1) of integrated luminosity collected in 2015 and 2018 at root sNN = 5.02TeV. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy E-T(gamma) > 2.5 GeV, pseudorapidity vertical bar eta(gamma)vertical bar 5 GeV, and with small diphoton transverse momentum and diphoton acoplanarity. The integrated and differential fiducial cross sections are measured and compared with theoretical predictions. The diphoton invariant mass distribution is used to set limits on the production of axion-like particles. This result provides the most stringent limits to date on axion-like particle production for masses in the range 6-100 GeV. Cross sections above 2 to 70 nb are excluded at the 95% CL in that mass interval. Swiss National Science Foundation (SNSF) Canton of Bern, Switzerland Canton of Geneva, Switzerland Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government Netherlands Organization for Scientific Research (NWO) Netherlands Government Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias National Council for Scientific and Technological Development (CNPq) Natural Sciences and Engineering Research Council of Canada (NSERC) German-Israeli Foundation for Scientific Research and Development Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Ministry of Science and Higher Education, Poland NCN, Poland National Natural Science Foundation of China (NSFC) Centre National de la Recherche Scientifique (CNRS) Beijing Municipal Science & Technology Commission Portuguese Foundation for Science and Technology PROMETEO Programme Generalitat Valenciana, Spain Ministry of Energy & Natural Resources - Turkey CERCA Programme Generalitat de Catalunya, Spain Federal Ministry of Education & Research (BMBF) Science & Technology Facilities Council (STFC) Azerbaijan National Academy of Sciences (ANAS) Marie Sklodowska-Curie Actions, European Union Russian Federation NRC KI, Russian Federation Istituto Nazionale di Fisica Nucleare (INFN) GenT Programme Generalitat Valenciana, Spain Ministry of Science and Technology, Taiwan Japan Society for the Promotion of Science SRC, Sweden Wallenberg Foundation, Sweden Ministry of Science and Technology, China United States Department of Energy (DOE) Danish Natural Science Research Council Herakleitos programme - EU-ESF, Greece French National Research Agency (ANR) Slovenian Research Agency - Slovenia Aristeia programme - EU-ESF, Greece Goran Gustafssons Stiftelse, Sweden Greek Ministry of Development-GSRT La Caixa Banking Foundation, Spain National Science Foundation (NSF) Alexander von Humboldt Foundation Thales programme - EU-ESF, Greece German Research Foundation (DFG) Canada Foundation for Innovation European Research Council (ERC) UK Research & Innovation (UKRI) Horizon 2020, European Union Australian Research Council Austrian Science Fund (FWF) Chinese Academy of Sciences Israel Science Foundation CRC, Canada IVADO, Canada Royal Society of London Benoziyo Center, Israel Compute Canada, Canada DST/NRF, South Africa ERDF, European Union Hong Kong SAR, China COST, European Union CEA-DRF/IRFU, France European Commission Greek NSRF, Greece Max Planck Society Spanish Government SERI, Switzerland Leverhulme Trust MNE/IFA, Romania SRNSFG, Georgia BSF-NSF, Israel CANARIE, Canada YerPhI, Armenia MSSR, Slovakia BMWFW, Austria CNRST, Morocco MIZS, Slovenia BCKDF, Canada DNRF, Denmark MESTD, Serbia SSTC, Belarus HGF, Germany RCN, Norway NRC, Canada ANID, Chile RGC, China ANPCyT CERN JINR

  • Open Access English
    Authors: 
    Thomas Bergauer; Marko Dragicevic; R. Frühwirth; Ilse Krätschmer; Thomas Madlener; Jochen Schieck; Freya Blekman; Bugra Bilin; Laurent Favart; Amandeep Kaur Kalsi; +410 more
    Publisher: Springer
    Countries: Spain, Croatia, Belgium, France, Belgium, Belgium, United Kingdom, Turkey, France, Belgium ...
    Project: EC | AMVA4NewPhysics (675440), EC | AMVA4NewPhysics (675440)

    A search for the standard model Higgs boson produced in association with a W or a Z boson and decaying to a pair of τ leptons is performed. A data sample of proton-proton collisions collected at s√ = 13 TeV by the CMS experiment at the CERN LHC is used, corresponding to an integrated luminosity of 35.9 fb−1. The signal strength is measured relative to the expectation for the standard model Higgs boson, yielding μ = 2.5 − 1.3 + 1.4 . These results are combined with earlier CMS measurements targeting Higgs boson decays to a pair of τ leptons, performed with the same data set in the gluon fusion and vector boson fusion production modes. The combined signal strength is μ = 1.24 − 0.27 + 0.29 (1.00 − 0.23 + 0.24 expected), and the observed significance is 5.5 standard deviations (4.8 expected) for a Higgs boson mass of 125 GeV. Journal of High Energy Physics, 2019 (6) ISSN:1029-8479 ISSN:1126-6708

  • Open Access German
    Authors: 
    Koehler, Mila;
    Country: Germany
    Project: EC | SIMPATIC (290597)

    In Germany, R&D subsidies are an important tool to support innovation in the private sector. This paper studies the welfare effects of R&D subsidies distributed through the German federal government's thematic R&D programs between 1994 and 2011. The analysis is based on a structural model of the R&D subsidy process which allows to estimate the benefits of R&D subsides to the German economy. The model takes into account heterogeneous application costs of firms and identifies the effect of the subsidy on the federal government's utility as well as on firm profits. Assuming a welfare-maximizing federal government, the estimated average social rate of return is 34% for Germany in the period 1994 to 2011. Thereby effects on firm profits are similar to effects on spillovers to the rest of the German economy. Besides results show that the subsidy rate decision in Germany remained remarkably stable over time, and that application costs as well as the marginal profitability of subsidized R&D projects are lower after the year 2000 compared to the years before.

  • Open Access English
    Authors: 
    Henrikus, Sarah S.; Tassis, Konstantinos; Zhang, Lei; Velde, Jasper H. M. van der; Gebhardt, Christian; Herrmann, Andreas; Jung, Gregor; Cordes, Thorben;
    Country: Germany
    Project: EC | SM-IMPORT (638536)

    Genetically encodable fluorescent proteins have revolutionized biological imaging in vivo and in vitro. Since there are no other natural fluorescent tags with comparable features, the impact of fluorescent proteins for biological research cannot be overemphasized. Despite their importance, their photophysical properties, i.e., brightness, count-rate and photostability, are relatively poor compared to synthetic organic fluorophores or quantum dots. Intramolecular photostabilizers were recently rediscovered as an effective approach to improve photophysical properties. The approach uses direct conjugation of photostablizing compounds such as triplet-state quenchers or redox-active substances to an organic fluorophore, thereby creating high local concentrations of photostabilizer. Here, we introduce an experimental strategy to screen for the effects of covalently-linked photostabilizers on fluorescent proteins. We recombinantly produced a double cysteine mutant (A206C/L221C) of α-GFP for attachment of photostabilizer-maleimides on the ß-barrel in close proximity to the chromophore. Whereas labelling with photostabilizers such as Trolox, Nitrophenyl, and Cyclooctatetraene, which are often used for organic fluorophores, had no effect on α-GFP-photostability, a substantial increase of photostability was found upon conjugation of α-GFP to an azobenzene derivative. Although the mechanism of the photostabilizing effects remains to be elucidated, we speculate that the higher triplet-energy of azobenzene might be crucial for triplet-quenching of fluorophores in the near-UV and blue spectral range. Our study paves the way towards the development and design of a second generation of fluorescent proteins with photostabilizers placed directly in the protein barrel by methods such as unnatural amino acid incorporation.

  • Open Access
    Authors: 
    Aad, Georges; Abbott, Braden Keim; Abbott, Dale; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Haider; Abouzeid, Hass; Abouzeid, Ossama; Abraham, Nicola Louise; +610 more
    Publisher: EDP Sciences
    Countries: Netherlands, Sweden, Denmark, Denmark, France, Italy, Italy, Norway, Italy, Norway ...
    Project: EC | LHCDMTOP (694202), EC | LHCDMTOP (694202)

    We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Au CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANIstralia; BMWFW and FWF, Austria; ANAXS, Azerbaijan; SSTC, Belarus;D, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRT, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; JINR; MESofRussia andNRCKI, Russian Federation; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOEandNSF, USA. In addition, individual groups andmembers have received support fromBCKDF, CANARIE, ComputeCanada, CRC and IVADO, Canada; Beijing Municipal Science & Technology Commission, China; COST, ERC, ERDF, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), theY Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [91]. Measurements of both the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a Z boson (t (t) over barZ) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on root s = 13 TeV proton-proton collision data with an integrated luminosity of 139 fb(-1), recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be a sigma(t (t) over barZ)= 0.99 +/- 0.05 (stat.) +/- 0.08 (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the t (t) over barZ system. Both absolute and normalised differential crosssection measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a chi(2)/ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions. Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC) Netherlands Organization for Scientific Research (NWO) Netherlands Government Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Horizon 2020 and Marie Sklodowska-Curie Actions, European Union, France Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) Portuguese Foundation for Science and Technology European Commission Natural Sciences and Engineering Research Council of Canada (NSERC) Ministry of Education, Science & Technological Development, Serbia German-Israeli Foundation for Scientific Research and Development Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Centre National de la Recherche Scientifique (CNRS) Beijing Municipal Science & Technology Commission Ministry of Science and Higher Education, Poland Ministry of Energy & Natural Resources - Turkey CERCA Programme Generalitat de Catalunya, Spain Federal Ministry of Education & Research (BMBF) Azerbaijan National Academy of Sciences (ANAS) GenT Programmes Generalitat Valenciana, Spain Istituto Nazionale di Fisica Nucleare (INFN) Ministry of Science and Technology, Taiwan Swiss National Science Foundation (SNSF) Danish Natural Science Research Council Cantons of Bern and Geneva, Switzerland French National Research Agency (ANR) Slovenian Research Agency - Slovenia Goran Gustafssons Stiftelse, Sweden Greek Ministry of Development-GSRT La Caixa Banking Foundation, Spain Alexander von Humboldt Foundation German Research Foundation (DFG) Canada Foundation for Innovation Wallenberg Foundation, Sweden Australian Research Council Austrian Science Fund (FWF) Israel Science Foundation Czech Republic Government Royal Society of London Benoziyo Center, Israel ComputeCanada, Canada DST/NRF, South Africa Minciencias, Colombia Hong Kong SAR, China CEA-DRF/IRFU, France Aristeia programmes Greek NSRF, Greece Max Planck Society Russian Federation Spanish Government SERI, Switzerland Leverhulme Trust MNE/IFA, Romania SRNSFG, Georgia BSF-NSF, Israel CANARIE, Canada YerPhI, Armenia MSSR, Slovakia CNRST, Morocco BMWFW, Austria DOEandNSF, USA MIZS, Slovenia EU-ESF, Greece BCKDF, Canada DNRF, Denmark SSTC, Belarus IVADO, Canada Thales Group COST, France ERDF, France HGF, Germany RCN, Norway NCN, Poland NRC, Canada CRC, Canada MESofRussia SRC, Sweden ERC, France RGC, China D, Chile ANPCyT CERN JINR

  • Publication . Article . Preprint . Other literature type . Research . Report . 2019
    Open Access English
    Authors: 
    Sirunyan, Albert M; Tumasyan, Armen; Jeitler, Manfred; Melo Da Costa, Eliza; Choi, Junho; Jeon, Sihyun; Kim, Junho; Kim, Jae Sung; Lee, Haneol; Lee, Kyeongpil; +284 more
    Publisher: Elsevier
    Countries: Germany, Belgium, France, Italy, Germany, Switzerland
    Project: EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440)

    A search for a narrow resonance with a mass between 350 and 700 GeV, and decaying into a pair of jets, is performed using proton-proton collision events containing at least three jets. The data sample corresponds to an integrated luminosity of 18.3 fb −1 recorded at s=13TeV with the CMS detector. Data are collected with a technique known as “data scouting”, in which the events are reconstructed, selected, and recorded at a high rate in a compact form by the high-level trigger. The three-jet final state provides sensitivity to lower resonance masses than in previous searches using the data scouting technique. The spectrum of the dijet invariant mass, calculated from the two jets with the largest transverse momenta in the event, is used to search for a resonance. No significant excess over a smoothly falling background is found. Limits at 95% confidence level are set on the production cross section of a narrow dijet resonance and compared with the cross section of a vector dark matter mediator coupling to dark matter particles and quarks. Translating to a model where the narrow resonance interacts only with quarks, upper limits on this coupling range between 0.10 and 0.15, depending on the resonance mass. These results represent the most stringent upper limits in the mass range between 350 and 450 GeV obtained with a flavor-inclusive dijet resonance search. Physics letters / B B 805, 135448 - (2020). doi:10.1016/j.physletb.2020.135448 Published by North-Holland Publ., Amsterdam

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