scholarly journals The physics of kaon decays: CP violation and lepton flavor nonconservation

1992 ◽  
Author(s):  
William R. Molzon ◽  
Bruce D. Winstein
Keyword(s):  
Cp Violation ◽  
Kaon Decays ◽  
Lepton Flavor

RARE KAON DECAYS

1989 ◽  
Vol 04 (01) ◽  
pp. 79-114 ◽  
Author(s):  
DOUGLAS A. BRYMAN
Keyword(s):  
Cp Violation ◽  
Standard Model ◽  
Kaon Decays ◽  
Theoretical Context ◽  
Neutral Particles ◽  
Muon Polarization ◽  
Lepton Flavor ◽  
The Standard Model ◽  
New Interactions ◽  
Shed Light

Major advances spanning several orders of magnitude in sensitivity are anticipated in the current round of experiments dealing with rare kaon decays. Observations of allowed processes, like [Formula: see text] and [Formula: see text], shed light on detailed aspects of the standard model. New sources of T or CP violation could be manifested by measurements of muon polarization in K → πμνμ and [Formula: see text] decays and by studies of reactions like [Formula: see text]. Evidence for new particles and new interactions could appear in advanced efforts to observe K → πxx′ and K → πx decays, where x and x′ represent hypothetical neutral particles, and in searches for lepton flavor violating processes [Formula: see text] and K+ → π+μe. The experiments are reviewed and their theoretical context is discussed.

scholarly journals Direct CP violation and the ΔI = 1/2 rule in K → ππ decay in the Standard Model

2022 ◽  
Vol 258 ◽  
pp. 01003
Author(s):  
Christopher Kelly
Keyword(s):  
Cp Violation ◽  
Standard Model ◽  
Systematic Error ◽  
Error Estimates ◽  
Lattice Calculation ◽  
Kaon Decays ◽  
The Standard Model

We discuss the RBC & UKQCD collaborations’ recent [1] lattice calculation of ϵ′, the measure of direct CP-violation in kaon decays. This result significantly improves on our previous 2015 calculation, with nearly 4× the statistics and more reliable systematic error estimates. We discuss how our results demonstrate the Standard Model origin of the ΔI = 1/2 rule, and present our plans for future calculations.

NEUTRINOS: LOOKING FORWARD TO THE FUTURE

2007 ◽  
Vol 16 (05) ◽  
pp. 1313-1329
Author(s):  
HISAKAZU MINAKATA
Keyword(s):  
Cp Violation ◽  
Neutrino Mass ◽  
Mass Hierarchy ◽  
Future Prospects ◽  
Neutrino Mass Hierarchy ◽  
Lepton Flavor ◽  
Mixing Parameters ◽  
Wide Range ◽  
Flavor Mixing ◽  
Mass Pattern

I discuss some aspects of future prospects of the experimental exploration of the unknowns in the neutrino mass pattern and the lepton flavor mixing. I start from measuring θ13 by reactors and accelerators as a prerequisite for proceeding to search for leptonic CP violation. I then discuss how CP violation can be uncovered, and how the neutrino mass hierarchy can be determined. I do these by resolving so called the "parameter degeneracy" which is required anyway if one wants to seek precision measurement of the lepton mixing parameters. As a concrete setting for resolving the degeneracy I use the Tokai-to-Kamioka-Korea two detector complex which receives neutrino superbeam from J-PARC, which is sometimes called as "T2KK". It is shown that T2KK is able to resolve all the eight-fold parameter degeneracy in a wide range of the lepton mixing parameters. Some alternative ways of measuring the unknowns are also briefly mentioned.

Measurement of the CP-Violation Parameterη+−γin Neutral Kaon Decays

1993 ◽  
Vol 70 (17) ◽  
pp. 2529-2532 ◽  
Author(s):  
E. J. Ramberg ◽  
G. J. Bock ◽  
R. Coleman ◽  
J. Enagonio ◽  
Y. B. Hsiung ◽  
...  
Keyword(s):  
Cp Violation ◽  
Neutral Kaon ◽  
Kaon Decays

SEARCH FOR KL→π0μ±e∓

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 651-653
Author(s):  
◽  
ANGELA BELLAVANCE
Keyword(s):  
Branching Ratio ◽  
Kaon Decays ◽  
Lepton Flavor ◽  
Ratio Limit

The KTeV experiment (Kaons at the TeVatron) at Fermilab studies CP violating and other rare kaon decays, including the search for the lepton-flavor violating mode KL→π0μ±e∓. KTeV has obtained a new, preliminary branching ratio limit of BR(KL→π0μ±e∓)<4.40×10-10.

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