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Publication

Search for CP violation with kinematic asymmetries in the D-0 -> K+K- pi(+)pi(-) decay

Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Sun Hee Kim, Jun Yong Kim, Kyung Taek Cho, Mithilesh Nayak, Yifei Guan
2019
Journal Articles

Abstract

We search for CP violation in the singly-Cabibbo-suppressed decay D-0 -> K+K-pi(+)pi(-) using data corresponding to an integrated luminosity of 988 fb(-1) collected by the Belle detector at the KEKB e(+)e(-). We measure a set of five kinematically dependent CP asymmetries, of which four asymmetries are measured for the first time. The set of asymmetry measurements can be sensitive to CP violation via interference between the different partial-wave contributions to the decay and performed on other pseudoscalar decays. We find no evidence of CP violation.

Official source

https://infoscience.epfl.ch/entities/publication/349a5469-5c8d-4b00-bea5-701ede34bdaf

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Mingkui Wang, Olivier Schneider, Chao Wang, Yiming Li, Sun Hee Kim, Jun Yong Kim, Kyung Taek Cho, Mithilesh Nayak, Yifei Guan
2019
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/349a5469-5c8d-4b00-bea5-701ede34bdaf

About this result

Ontological neighbourhood

Physics

Particle physics: Standard Model

Related concepts (21)

Baryon asymmetry

In physical cosmology, the baryon asymmetry problem, also known as the matter asymmetry problem or the matter–antimatter asymmetry problem, is the observed imbalance in baryonic matter (the type of matter experienced in everyday life) and antibaryonic matter in the observable universe. Neither the standard model of particle physics nor the theory of general relativity provides a known explanation for why this should be so, and it is a natural assumption that the universe is neutral with all conserved charges.

CP violation

In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge symmetry) and P-symmetry (parity symmetry). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle (C-symmetry) while its spatial coordinates are inverted ("mirror" or P-symmetry). The discovery of CP violation in 1964 in the decays of neutral kaons resulted in the Nobel Prize in Physics in 1980 for its discoverers James Cronin and Val Fitch.

Pseudoscalar meson

In high-energy physics, a pseudoscalar meson is a meson with total spin 0 and odd parity (usually notated as J^P = 0^− ). Pseudoscalar mesons are commonly seen in proton-proton scattering and proton-antiproton annihilation, and include the pion (π), kaon (K), eta (η), and eta prime () particles, whose masses are known with great precision. Among all of the mesons known to exist, in some sense, the pseudoscalars are the most well studied and understood.

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