scholarly journals The Unitary Triangle Through $B\rightarrow \rho^{\pm} \pi^{\mp}$ Decays

2007 ◽  
Author(s):  
Salim Safir
Keyword(s):  
Unitary Triangle

scholarly journals Unitarity of neutrino mixing matrix

2019 ◽  
Vol 206 ◽  
pp. 09009
Author(s):  
Ha Nguyen Thi Kim ◽  
Van Nguyen Thi Hong ◽  
Son Cao Van
Keyword(s):  
Cp Violation ◽  
Neutrino Oscillations ◽  
Graphical Form ◽  
Muon Neutrinos ◽  
Neutrino Mixing ◽  
Electron Neutrinos ◽  
Tau Neutrinos ◽  
The Matrix ◽  
Mixing Matrix ◽  
Unitary Triangle

Neutrinos are neutral leptons and there exist three types of neutrinos (electron neutrinos νe, muon neutrinos νµ and tau neutrinos ντ). These classifications are referred to as neutrinos’s “flavors”. Oscillations between the different flavors are known as neutrino oscillations, which occurs when neutrinos have mass and non-zero mixing. Neutrino mixing is governed by the PMNS mixing matrix. The PMNS mixing matrix is constructed as the product of three independent rotations. With that, we can describe the numerical parameters of the matrix in a graphical form called the unitary triangle, giving rise to CP violation. We can calculate the four parameters of the mixing matrix to draw the unitary triangle. The area of the triangle is a measure of the amount of CP violation.

scholarly journals TREE FCNC AND NON-UNITARITY OF CKM MATRIX

2007 ◽  
Vol 16 (05) ◽  
pp. 1445-1461 ◽  
Author(s):  
C. S. KIM ◽  
AMOL DIGHE
Keyword(s):  
Quark Model ◽  
Phase Angle ◽  
Tree Level ◽  
Ckm Matrix ◽  
Down Quark ◽  
Unitary Triangle

We discuss possible signatures of the tree level FCNC, which results from the non-unitarity of CKM matrix. We first define the unitarity step-by-step, and possible test of the non-unitarity through the 4-value-KM parametrization. We, then, show how the phase angle of the unitary triangle would change in case of the vector-like down quark model. As another example of tree FCNC, we investigate the leptophobic Z′ model and its application to the recent Bs mixing measurements.

scholarly journals Test of the fourth quark generation from the Cabibbo–Kobayashi–Maskawa matrix

2021 ◽  
pp. 2150110
Author(s):  
S. R. Juárez Wysozka ◽  
P. Kielanowski
Keyword(s):  
New Physics ◽  
Good Choice ◽  
Fourth Generation ◽  
Complex Conjugate ◽  
Unitarity Triangle ◽  
Ckm Matrix ◽  
Quark Sector ◽  
Mixing Matrix ◽  
Unitary Triangle ◽  
Quark Generation

The structure of the mixing matrix in the electroweak quark sector with four generations of quarks is investigated. We conclude that the area of the unitarity quadrangle is not a good choice as a possible measure of the CP violation. In search of new physics, we analyze how the existence of the fourth quark family may influence on the values of the Cabibbo–Kobayashi–Maskawa matrix and we show that one can test for the existence of the fourth generation using the Jarlskog invariants of the known quarks only. The analysis based on the measured unitary triangle exhibits some tension with the assumption of three quark generations. The measurement of the unitarity triangle obtained from the scalar product of the second row/column of the CKM matrix by the complex conjugate of third row/column can provide information about the existence of the fourth generation of quarks.

scholarly journals ANGULAR DISTRIBUTION ANALYSIS OF B → J/ψ K* AND RESOLVING DISCRETE AMBIGUITIES IN THE DETERMINATION OF ϕ1

2003 ◽  
Vol 18 (08) ◽  
pp. 1437-1442 ◽  
Author(s):  
H.-Y. CHENG ◽  
Y.-Y. KEUM ◽  
K.-C. YANG
Keyword(s):  
Angular Distribution ◽  
B Meson ◽  
Factorization Method ◽  
Distribution Analysis ◽  
B Meson Decays ◽  
Factorization Approach ◽  
Qcd Factorization ◽  
The Status ◽  
Unitary Triangle

We discuss the angular distribution analysis of B → J/ψ K* decays and a way to resolve discrete ambiguites in the determination of the unitary triangle ϕ1(=β). We study the status of factorization hypothesis in the color-suppressed B meson decays: B → J/ψ K(*) within the general factorization approach and QCD-factorization method.

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