Search for CP violation in D0→KS0KS0 decays in proton–proton collisions at s=13TeV


Zhokin A., Zhizhin I., Zarubin A., Yuldashev B., Voytishin N., Vorobyev A., ...Daha Fazla

European Physical Journal C, cilt.84, sa.12, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 84 Sayı: 12
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1140/epjc/s10052-024-13244-0
  • Dergi Adı: European Physical Journal C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

A search is reported for charge-parity CP violation in D0→KS0KS0 decays, using data collected in proton–proton collisions at s=13TeV recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6fb-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∗+→D0π+ and D∗-→D¯0π-. The CP asymmetry in D0→KS0KS0 is measured to be ACP(KS0KS0)=(6.2±3.0±0.2±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 D0→KS0π+π- 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.