Measurements of the $$\mathrm {p}\mathrm {p}\rightarrow \mathrm{Z}\mathrm{Z}$$ production cross section and the $$\mathrm{Z}\rightarrow 4\ell $$ branching fraction, and constraints on anomalous triple gauge couplings at $$\sqrt{s} = 13\,\text {TeV} $$
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· Eur.Phys.J.C
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Four-lepton production in proton-proton collisions, $$\mathrm {p}\mathrm {p}\rightarrow (\mathrm{Z}/ \gamma ^*)(\mathrm{Z}/\gamma ^*) \rightarrow 4\ell $$ , where $$\ell = \mathrm {e}$$ or $$\mu $$ , is studied at a center-of-mass energy of 13 $$\,\text {TeV}$$ with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 $$\,\text {fb}^{-1}$$ . The ZZ production cross section, $$\sigma (\mathrm {p}\mathrm {p}\rightarrow \mathrm{Z}\mathrm{Z}) = 17.2 \pm 0.5\,\text {(stat)} \pm 0.7\,\text {(syst)} \pm 0.4\,\text {(theo)} \pm 0.4\,\text {(lumi)} \text { pb} $$ , measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region $$60< m_{\ell ^+\ell ^-} < 120\,\text {GeV} $$ , is consistent with standard model predictions. Differential cross sections are measured and are well described by the theoretical predictions. The Z boson branching fraction to four leptons is measured to be $$\mathcal {B}(\mathrm{Z}\rightarrow 4\ell ) = 4.8 \pm 0.2\,\text {(stat)} \pm 0.2\,\text {(syst)} \pm 0.1\,\text {(theo)} \pm 0.1\,\text {(lumi)} \times 10^{-6}$$ for events with a four-lepton invariant mass in the range $$80< m_{4\ell } < 100\,\text {GeV} $$ and a dilepton mass $$m_{\ell \ell } > 4\,\text {GeV} $$ for all opposite-sign, same-flavor lepton pairs. The results agree with standard model predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZ $$\gamma $$ couplings at 95% confidence level: $-0.0012
- Research Organization:
- ABC Federal U.; Aachen, Tech. Hochsch.; Adiyaman U.; Alabama U.; Andes U., Bogota; Antwerp U.; Athens U.; Auckland U.; Bangalore, Indian Inst. Sci.; Bari Polytechnic; Bari U.; Basilicata U., Potenza; Baylor U.; BeiHang U.; Beijing, Inst. High Energy Phys.; Belgrade U.; Beykent U.; Bhabha Atomic Res. Ctr.; Bhubaneswar, Inst. Phys.; Bhubaneswar, NISER; Bingöl U.; Bogazici U.; Bologna U.; Boskovic Inst., Zagreb; Boston U.; Brandenburg Tech. U.; Bristol U.; British U. in Egypt; Brown U.; Brunel U.; Brussels U.; Budapest, RMKI; CC, Villeurbanne; CERN; CHEP, Taegu; CINVESTAV, IPN; Cag U., Mersin; Cairo, Acad. Sci. Res. Tech.; Caltech; Cantabria Inst. of Phys.; Canterbury U.; Carnegie Mellon U.; Catania U.; Catholic U. America; Charles U.; Chonbuk Natl. U.; Chonnam Natl. U.; Chulalongkorn U.; Colorado U.; Conacyt, Mexico; Cornell U.; Cukurova U.; Cyprus U.; DESY; Debrecen, Inst. Nucl. Res.; Delhi U.; Democritos Nucl. Res. Ctr.; Dubna, JINR; Ecole Polytechnique; Eotvos U.; Erzincan U.; Fayoum U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Florence U.; Florida Inst. Tech.; Florida Intl. U.; Florida State U.; Florida U.; Frascati; GTU, Tbilisi; Genoa U.; Gent U.; Guglielmo Marconi U.; Hamburg U.; Hanyang U.; Haute Alsace U.; Helsinki Inst. of Phys.; Helsinki U.; Helwan U.; IAC, La Laguna; IISER, Pune; IIUM, Kuala Lumpur; INFN, Bari; INFN, Bologna; INFN, Catania; INFN, Florence; INFN, Genoa; INFN, Milan Bicocca; INFN, Naples; INFN, Padua; INFN, Pavia; INFN, Perugia; INFN, Pisa; INFN, Rome; INFN, Trieste; INFN, Turin; IPM, Tehran; IRFU, Saclay; Iberoamericana U.; Illinois U., Chicago; Imperial Coll., London; Indian Inst. Tech., Bhubaneswar; Indian Inst. Tech., Madras; Inst. Scintill. Mat., Kharkiv; Ioannina U.; Iowa U.; Isfahan Tech. U.; Islamic Azad U., Sci. Res. Branch, Tehran; Istanbul Aydin U.; Istanbul Bilgi U.; Istanbul, Tech. U.; Izmir Inst. Tech.; Johns Hopkins U.; KIT, Karlsruhe, EKP; Kafkas U.; Kansas State U.; Kansas U.; Kharkov, KIPT; Korea U.; LIP, Lisbon; Lappeenranta U. Tech.; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lebedev Inst.; Louvain U.; Lyon, IPN; MIT; MOSTI, Malaysian Nucl. Agency, Kajang; Madrid, Autonoma U.; Madrid, CIEMAT; Malaya U.; Marmara U.; Maryland U.; Mersin U.; Middle East Tech. U., Ankara; Milan Bicocca U.; Mimar Sinan U.; Minnesota U.; Minsk, Inst. Nucl. Problems; Mississippi U.; Moscow Phys. Eng. Inst.; Moscow State U.; Moscow, INR; Moscow, ITEP; Moscow, MIPT; NCBJ, Swierk; NICPB, Tallinn; Naples U.; Natl. Tech. U., Athens; Nebraska U.; Necmettin Erbakan U., Konya; Northeastern U.; Northwestern U.; Notre Dame U.; Novosibirsk State U.; Novosibirsk, IYF; Ohio State U.; Oviedo U.; PSI, Villigen; Padua U.; Panjab U.; Pavia U.; Peking U.; Pelotas U.; Perugia U.; Piemonte Orientale U., Novara; Piri Reis U., Istanbul; Pisa U.; Pisa, Scuola Normale Superiore; Princeton U.; Puebla U., Inst. Fis.; Puerto Rico U., Mayaguez; Purdue U.; Purdue U., Calumet; Quaid-i-Azam U.; Rice U.; Riga Tech. U.; Rio de Janeiro State U.; Rio de Janeiro, CBPF; Rochester U.; Rockefeller U.; Rome U.; Ruhuna U.; Rutgers U., Piscataway; Rutherford; SUNY, Buffalo; Saha Inst.; San Francisco de Quito U.; San Luis Potosi U.; Sao Paulo, IFT; Seoul Natl. U.; Seoul U.; Serpukhov, IHEP; Siena U.; Sinop U.; Sofiya U.; Sofiya, Inst. Nucl. Res.; Southampton U.; Split Tech. U.; Split U.; St. Petersburg Polytechnic Inst.; St. Petersburg, INP; Stefan Meyer Inst. Subatomare Phys.; Strasbourg, IPHC; Suez Canal U.; Sungkyunkwan U.; TIFR, Mumbai, DHEP; TU Vienna; Taiwan, Natl. Central U.; Taiwan, Natl. Taiwan U.; Tbilisi State U.; Tennessee U.; Texas A&M U. Qatar, Doha; Texas A-M; Texas Tech.; Trieste U.; Turin U.; U. Campinas; U. Debrecen, Inst. Phys.; U. Mons; UC, Davis; UC, Riverside; UC, San Diego; UC, Santa Barbara; UCLA; University Coll., Dublin; Utah Valley U.; VINCA Inst. Nucl. Sci., Belgrade; Vanderbilt U.; Vienna, OAW; Vilnius U.; Virginia U.; Visva Bharati U.; Vrije U., Brussels; Warsaw U.; Warsaw U. of Tech.; Wayne State U.; Wisconsin U., Madison; Yazd U.; Yerevan Phys. Inst.; Zurich U.; Zurich, ETH
- Sponsoring Organization:
- US Department of Energy
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1398796
- Alternate ID(s):
- OSTI ID: 22691129
- Report Number(s):
- CERN-EP-2017-219; CMS-SMP-16-017; FERMILAB-PUB-17-412-CMS; oai:inspirehep.net:1625296; arXiv:1709.08601
- Journal Information:
- Eur.Phys.J.C, Journal Name: Eur.Phys.J.C Vol. 78
- Country of Publication:
- United States
- Language:
- English
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