Search for CP Violation in D0→KS0KS0 Decays in Proton–Proton Collisions √𝑠 =13  TeV

European Physical Journal C 2024
Kārlis Dreimanis, Antra Gaile, Conrado Munoz Diaz, Dace Osīte, Guntis Pikurs, Andris Potrebko, Markus Seidel, Dimitrios Sidiropoulos Kontos, CMS Collaboration

A search is reported for charge-parity violation in decays, using data collected in proton–proton collisions at recorded by the CMS experiment in 2018. The analysis uses a dedicated data set that corresponds to an integrated luminosity of 41.6, 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 π and π. The asymmetry in is measured to be , where the three uncertainties represent the statistical uncertainty, the systematic uncertainty, and the uncertainty in the measurement of the asymmetry in the ππ decay. This is the first asymmetry measurement by CMS in the charm sector as well as the first to utilize a fully hadronic final state.

DOI
10.1140/epjc/s10052-024-13244-0
Hyperlink
https://link.springer.com/article/10.1140/epjc/s10052-024-13244-0

The CMS Collaboration, Hayrapetyan, A., Dreimanis, K., Gaile, A., Munoz Diaz, C., Osīte, D., Pikurs, G., Potrebko, A., Seidel, M., Sidiropoulos Kontos, D., ... [et al.] Search for CP Violation in D0→KS0KS0 Decays in Proton–Proton Collisions √𝑠 =13  TeV. European Physical Journal C, 2024, Vol. 84, No. 12, Article number 1264. ISSN 1434-6044. e-ISSN 1434-6052. Available from: doi:10.1140/epjc/s10052-024-13244-0

Publication language
English (en)