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B Physics: CP Violation Beyond the SM
High Energy Physics - Phenomenology · Submitted 21 Dec 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma $ to be in the interval $[-170^{\circ};-10^{\circ}]\cup \lbrack 10^{\circ};170^{\circ}]$ is 99.7%.
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The abstract, sentence by sentence
We analyse the present experimental evidence for a complex CKM matrix, even allowing for New Physics contributions to $\epsilon_{K}$, $a_{J/\Psi K_{S}}$%, $\Delta M_{B_{d}}$, $\Delta M_{B_{s}}$, and the $\Delta I=1/2$ piece of $% B\to \rho \rho $ and $B\to \rho \pi $. We emphasize the crucial r\^{o}le played by the angle $\gamma $ in both providing irrefutable evidence for a 3$\times $3 complex CKM matrix and placing constraints on the size of NP contributions. It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma $ to be in the interval $[-170^{\circ};-10^{\circ}]\cup \lbrack 10^{\circ};170^{\circ}]$ is 99.7%. Large value of the phase $\chi $, e.g. of order $\lambda $, is only possible in models where the unitarity of the $3\times 3$ Cabibbo-Kobayashi-Maskawa matrix is violated through the introduction of extra $Q=2/3$ quarks. We study the allowed range for $\chi $ and the effect of a large $\chi $ on various low-energy observables, such as CP asymmetries in $B$ meson decays. We also discuss the correlated effects which would be observable at high energy colliders, like decays $t\to cZ$, etc..
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We analyse the present experimental evidence for a complex CKM matrix, even allowing for New Physics contributions to $\epsilon_{K}$, $a_{J/\Psi K_{S}}$%, $\Delta M_{B_{d}}$, $\Delta M_{B_{s}}$, and the $\Delta I=1/2$ piece of $% B\to \rho \rho $ and $B\to \rho \pi $. | contribution 1.00 | 0.79 | 0.08 | asserted 0.57 |
| s1 | We emphasize the crucial r\^{o}le played by the angle $\gamma $ in both providing irrefutable evidence for a 3$\times $3 complex CKM matrix and placing constraints on the size of NP contributions. | interpretation 0.74 | 0.39 | 0.16 | asserted 1.00 |
| s2 | It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma $ to be in the interval $[-170^{\circ};-10^{\circ}]\cup \lbrack 10^{\circ};170^{\circ}]$ is 99.7%. | result 1.00 | 0.86 | 0.67 | asserted 1.00 |
| s3 | Large value of the phase $\chi $, e.g. of order $\lambda $, is only possible in models where the unitarity of the $3\times 3$ Cabibbo-Kobayashi-Maskawa matrix is violated through the introduction of extra $Q=2/3$ quarks. | result 0.55 | 0.22 | 0.06 | asserted 0.63 |
| s4 | We study the allowed range for $\chi $ and the effect of a large $\chi $ on various low-energy observables, such as CP asymmetries in $B$ meson decays. | contribution 1.00 | 0.85 | 0.04 | asserted 0.64 |
| s5 | We also discuss the correlated effects which would be observable at high energy colliders, like decays $t\to cZ$, etc.. | contribution 0.97 | 0.68 | 0.03 | asserted 0.50 |
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The paper
Original abstract
We analyse the present experimental evidence for a complex CKM matrix, even allowing for New Physics contributions to $\epsilon_{K}$, $a_{J/\Psi K_{S}}$%, $\Delta M_{B_{d}}$, $\Delta M_{B_{s}}$, and the $\Delta I=1/2$ piece of $% B\to \rho \rho $ and $B\to \rho \pi $. We emphasize the crucial r\^{o}le played by the angle $\gamma $ in both providing irrefutable evidence for a 3$\times $3 complex CKM matrix and placing constraints on the size of NP contributions. It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma $ to be in the interval $[-170^{\circ};-10^{\circ}]\cup \lbrack 10^{\circ};170^{\circ}]$ is 99.7%. Large value of the phase $\chi $, e.g. of order $\lambda $, is only possible in models where the unitarity of the $3\times 3$ Cabibbo-Kobayashi-Maskawa matrix is violated through the introduction of extra $Q=2/3$ quarks. We study the allowed range for $\chi $ and the effect of a large $\chi $ on various low-energy observables, such as CP asymmetries in $B$ meson decays. We also discuss the correlated effects which would be observable at high energy colliders, like decays $t\to cZ$, etc..
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Papers whose main result relates to this one's
States the same result 1 paper
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It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma$ to be in the interval $[-170^\circ;-10^\circ]\cup [10^\circ;170^\circ]$ is 99.7%.
States a conflicting result 1 paper
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We show that present experimental data allow for a real CKM matrix provided that new physics also contributes to Delta m_{B_d} by at least 20% of the SM contribution (for rho > 0), besides generating CP violation in the kaon sector.
A Real CKM Matrix and Physics Beyond the Standard Model · 0.92
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