Publication

Search for CP violation in charged-Ξ and Λ hyperon decays

2004
Journal Articles

Abstract

The novel sources of CP violation observed in charged χ and λ hyperon decays were investigated. A comparison of the p and p̄ angular distributions in the hyperon decays was made using a subset of the data from the HyperCP experiment (E871) at Fermilab. A possible source of bias was found to be a momentum-dependent differential loss of events due to interactions of the χ- and χ̄+ decay products. The obtained result was observed to be stable with respect to time, χ momentum, and secondary-beam intensity, The results show that differences between the χ- and χ+ production angles could cause a bias due to production polarization differences.

Official source

https://infoscience.epfl.ch/entities/publication/01a83a33-e363-4477-ad8d-1e77b5557ed5

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2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/01a83a33-e363-4477-ad8d-1e77b5557ed5

About this result

Related concepts (32)

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.

Hyperon

In particle physics, a hyperon is any baryon containing one or more strange quarks, but no charm, bottom, or top quark. This form of matter may exist in a stable form within the core of some neutron stars. Hyperons are sometimes generically represented by the symbol Y. The first research into hyperons happened in the 1950s and spurred physicists on to the creation of an organized classification of particles.

Kaon

In particle physics, a kaon (ˈkeɪ.ɒn), also called a K meson and denoted _Kaon, is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark). Kaons have proved to be a copious source of information on the nature of fundamental interactions since their discovery in cosmic rays in 1947.

Related publications (7)

Search for CP violation in charged-Ξ and Λ hyperon decays

Chat with Graph Search

First measurement of Σ+n → ¢p and Σ+n → Σ0 p cross sections via Σ+-nucleus scattering at an electron-positron collider

Search for b-hadron decays to long-lived particles in the CMS endcap muon detectors

Measurement of branching fractions and CP asymmetries in $ {\varLambda}_b^0\left({\varXi}_b^0\right)\to p{K}_{\textrm{S}}^0{h}^{-} $ decays