Search for $CP$ violation in D$^0$$$$\to$$ K$$^0_\mathrm{S}$$K$$^0_\mathrm{S}$$ decays in proton-proton collisions at $$\sqrt{s}$$ = 13 TeV
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· Eur.Phys.J.C
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A search is reported for charge-parity $CP$ violation in D$^0$$$$\to$$ K$$^0_\mathrm{S}$$K$$^0_\mathrm{S}$$ decays, using data collected in proton-proton collisions at $$\sqrt{s}$$ = 13 TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6 fb$$^{-1}$$, which consists of about 10 billion events containing a pair of b hadrons, nearly all of which decay to charm hadrons. The flavor of the neutral D meson is determined by the pion charge in the reconstructed decays D$$^{*+}$$$$\to$$ D$$^0\pi^+$$ and D$$^{*-}$$$$\to$$ D$$^0\pi^-$$. The $CP$ asymmetry in D$^0$$$$\to$$ K$$^0_\mathrm{S}$$K$$^0_\mathrm{S}$$ is measured to be $$A_{CP}$$(K$$^0_\mathrm{S}$$K$$^0_\mathrm{S}$$) = (6.2 $$\pm$$ 3.0 $$\pm$$ 0.2 $$\pm$$ 0.8)%, where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the $CP$ asymmetry in the D$^0$ $$\to$$ K$$^0_\mathrm{S}\pi^+\pi^-$$ decay. This is the first $CP$ asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.
- Research Organization:
- ABC Federal U.; AGH-UST, Cracow; AUM, Kuwait; Aachen, Tech. Hochsch.; Adiyaman U.; Ain Shams U., Cairo; Alabama U.; Alexandria U.; Andes U., Bogota; Annecy, LAPP; Antioquia U.; Antwerp U.; Arak U.; Assiut U.; Athens U.; Babes-Bolyai U.; Babol, Noshirvani U. Technol.; Bangalore, Indian Inst. Sci.; Bari U.; Baylor U.; Beihang U.; Beijing, Inst. High Energy Phys.; Belgrade U.; Bethel Coll.; Bhubaneswar, Inst. Phys.; Bhubaneswar, NISER; Bingöl U.; Bogazici U.; Boskovic Inst., Zagreb; Boston U.; Brandenburg Tech. U.; Bristol U.; British U. in Egypt; Brown U.; Brunel U.; Brussels U.; Bucharest, IFIN-HH; Budapest, RMKI; CC, Villeurbanne; CERN; CHEP, Taegu; CINVESTAV, IPN; CNRS, France; Cairo U.; Cairo, Acad. Sci. Res. Tech.; Caltech; Campinas State U.; Cankaya U., Ankara; Cantabria Inst. of Phys.; Canterbury U.; Carnegie Mellon U.; Catania U.; Catholic U.; Catholic U. America; Charles U.; Chicago U.; Chonnam Natl. U.; Chulalongkorn U.; Colombo U.; Colorado U.; Conacyt, Mexico; Cornell U.; Cukurova U.; Cyprus U.; DESY; Debrecen U.; Debrecen, Inst. Nucl. Res.; Delhi Tech. U.; Delhi U.; Democritos Nucl. Res. Ctr.; Durham U., IPPP; EKU KRC, Gyongyos; ENEA, Bologna; Ecole Polytechnique; Ecole Polytechnique, Lausanne; Enrico Fermi Ctr., Rome; Eotvos U.; Erciyes U.; Erzincan U.; Fayoum U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Florence U.; Florida Inst. Tech.; Florida State U.; Florida U.; Frascati; Free State U.; Fudan U.; Fudan U., Shanghai; GTU, Tbilisi; Gangneung-Wonju Natl. U.; Gent U.; Guglielmo Marconi U.; Hacettepe U.; Hamburg U.; Hanyang U.; Haute Alsace U.; Haute Alsace U., GRPHE; Hefei, CUST; Helsinki Inst. of Phys.; Helsinki U.; Helwan U.; Henan Normal U.; Higher Sch. of Economics, Moscow; Hyderabad U.; IAS, Julich; ICTEA, Oviedo; IISER, Pune; 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; IP2I, Lyon; IPM, Tehran; IRFU, Saclay; Iberoamericana U.; Illinois U., Chicago; Imperial Coll., London; Indian Inst. Tech., Bhubaneswar; Indian Inst. Tech., Gandhinagar; Indian Inst. Tech., Madras; Inst. Scintill. Mat., Kharkiv; Ioannina U.; Iowa U.; Isfahan Tech. U.; Istanbul Tech. U.; Istanbul U.; Istanbul, Tech. U.; Istinye U., Istanbul; Izmir U. Economics, Izmir; Johns Hopkins U.; Julich, Forschungszentrum; KIT, Karlsruhe, EKP; KIT, Karlsruhe, IKP; Kafkas U.; Kansas State U.; Kansas U.; Karamanoglu Mehmetbey U., Karaman; Kharkov Natl. U.; Kharkov, KIPT; Kharkov, Single Crystals Res. Inst.; Koc U.; Konya Technical U.; Korea U.; Kyung Hee U.; Kyungpook Natl. U.; LIP, Lisbon; LLR, Palaiseau; Lappeenranta U. Tech.; Latvia U., ISSP; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Louvain U.; Louvain U., CP3; MIT; MIT, LNS; Madrid, Autonoma U.; Madrid, CIEMAT; Malaya U.; Marmara U.; Maryland U.; Mersin U.; Middle East Tech. U., Ankara; Milan Bicocca U.; Minnesota U.; Monash U.; Montenegro U.; NCBJ, Swierk; NCP, Islamabad; NICPB, Tallinn; Nanjing Normal U.; Naples U.; Natl. Tech. U., Athens; Natl. U. Malaysia; Naval Academy, Annapolis; Near East U.; Nebraska U.; Northeastern U.; Northwestern U.; Notre Dame U.; Ohio State U.; Oviedo U.; PSI, Villigen; Panjab U.; Panjab U., Chandigarh; Peking U.; Peking U., SKLNPT; Perugia U.; Piemonte Orientale U., Alessandria; Pisa U.; Pisa, Scuola Normale Superiore; Princeton U.; Puebla U., Inst. Fis.; Puebla U., Mexico; Puerto Rico U., Mayaguez; Punjab Agric. U., Ludhiana; Purdue U.; Purdue U., Calumet; Quaid-i-Azam U.; Rice U.; Riga Tech. U.; Rio Grande do Sul U.; Rio de Janeiro Federal U.; Rio de Janeiro State U.; Rio de Janeiro, CBPF; Rochester U.; Rome U.; Ruhuna U.; Rutgers U., Piscataway; Rutherford; SNS Project, Oak Ridge; SSM, Naples; SUNY, Buffalo; SYSU, Guangzhou; Saha Inst.; San Francisco de Quito U.; Sci. Tech. U., Beijing; Sejong U.; Seoul Natl. U.; Seoul U.; Sharif U. of Tech.; Sinop U.; Sofiya U.; Sofiya, Inst. Nucl. Res.; Soltan Inst., Swierk; Sonora U.; South China Normal U.; Southampton U.; Split Tech. U.; Split U.; 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.; Tarapaca U.; Tashkent, IYF; Tata Inst.; Tbilisi State U.; Tennessee U.; Texas A&M U. Qatar, Doha; Texas A-M; Texas Tech.; Trento U.; Tsinghua U., Beijing; Turin U.; U. Campinas; U. Debrecen, Inst. Phys.; U. Florida, Gainesville (main); UC, Davis; UC, Riverside; UC, Riverside (main); UC, San Diego; UC, Santa Barbara; UCAS, Beijing; UCLA; UPII, IPN; USTM, Behshahr; University Coll., Dublin; Unlisted; Unlisted, EG; VINCA Inst. Nucl. Sci., Belgrade; Valencia U., IFIC; Vanderbilt U.; Vienna U.; Vienna, OAW; Vilnius U.; Virginia U.; Visva Bharati U.; Vrije U., Brussels; Warsaw U.; Warsaw U. of Tech.; Warsaw U. of Tech. (main); Wayne State U.; Wigner RCP, Budapest; Wisconsin U., Madison; Wuppertal U.; Yerevan Phys. Inst.; Yerevan State U.; Yildiz Tech. U.; Yonsei U.; Yozgat Bozok U.; Zhejiang U.; Zhongshan U.; Zurich U.; Zurich, ETH
- Sponsoring Organization:
- US Department of Energy
- Grant/Contract Number:
- 89243024CSC000002; AC02-07CH11359
- OSTI ID:
- 2396947
- Report Number(s):
- CERN-EP-2024-120; CMS-BPH-23-005; FERMILAB-PUB-24-0340-CMS; oai:inspirehep.net:2788405; arXiv:2405.11606
- Journal Information:
- Eur.Phys.J.C, Journal Name: Eur.Phys.J.C Journal Issue: 12 Vol. 84
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:1843253
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