scholarly journals LARGE SU(3) BREAKING EFFECTS AND CP VIOLATION IN B+ DECAYS INTO THREE CHARGED OCTET PSEUDOSCALAR MESONS

2014 ◽  
Vol 29 (03n04) ◽  
pp. 1450011 ◽  
Author(s):  
DONG XU ◽  
GUAN-NAN LI ◽  
XIAO-GANG HE
Keyword(s):  
Experimental Data ◽  
Cp Violation ◽  
Branching Ratios ◽  
Lhcb Collaboration ◽  
The Other ◽  
Order Derivative ◽  
B Decays ◽  
Pseudoscalar Mesons ◽  
Cp Asymmetries

The LHCb collaboration has recently reported evidence for nonzero CP asymmetries in B+ decays into π+K+K-, π+π+π-, K+K+K- and K+π+π-. The branching ratios for these decays have also been measured with different values ranging from 5×10-6 to 51×10-6. If flavor SU(3) symmetry is a good symmetry for B decays, in the case that the dominant amplitude is momentum independent it is expected that branching ratios Br and CP violating rate differences [Formula: see text] satisfy, Br (π+π+π-) = 2 Br (π+K+K-), Br (K+K+K-) = 2 Br (K+π+π-) and Δ CP (π+π+π-) = 2Δ CP (π+K+K-) = -Δ CP (K+K+K-) = -2Δ CP (K+π+π-). The experimental data do not exhibit the expected pattern for the branching ratios. The rate differences for B+→π+π+π- and B+→K+ K+ K- satisfy the relation between ΔS = 0 and ΔS = 1 as well, but the other two do not, with the CP asymmetries having different signs than expected. In this paper, we study how to include momentum dependent and also SU(3) breaking effects on these decays to explain experimental data. We find that by including only the lowest order derivative terms, in the SU(3) limit, the decay patterns cannot be explained. Large SU(3) breaking effects are needed to explain the data.

NEW RESULT OF DIRECT CP VIOLATION IN B → π+π-π+π-

2011 ◽  
Vol 26 (17) ◽  
pp. 2899-2912 ◽  
Author(s):  
GANG LÜ ◽  
ZHEN-HUA ZHANG ◽  
XIU-YING LIU ◽  
LI-YING ZHANG
Keyword(s):  
Experimental Data ◽  
Cp Violation ◽  
Invariant Mass ◽  
Branching Ratios ◽  
Effective Parameter ◽  
Matrix Elements ◽  
Strong Constraint ◽  
Ckm Matrix ◽  
First Order ◽  
Isospin Violation

In the framework of factorization, based on the first-order of isospin violation, we study direct CP violation in the decay of [Formula: see text] including the effect of ρ–ω mixing. The CP violation depends strongly on Cabibbo–Kobayashi–Maskawa (CKM) matrix elements and the effective parameter, Nc. Recently, the experimental data for the branching ratios of [Formula: see text] are accurate and we can give the strong constraint on the range of Nc. We find that the CP violating asymmetry is large and ranges from -82% to -98% via ρ–ω mixing mechanism when the invariant mass of the π+π- pair is in the vicinity of the ω resonance. We also discuss the possibility to observe the predicted CP violating asymmetries at the LHC.

scholarly journals Study on branching ratios and direct CP asymmetries of D → PV decays

2014 ◽  
Vol 29 ◽  
pp. 1460209 ◽  
Author(s):  
Qin Qin ◽  
Hsiang-Nan Li ◽  
Cai-Dian Lü ◽  
Fu-Sheng Yu
Keyword(s):  
Experimental Data ◽  
Pseudoscalar Meson ◽  
Short Distance ◽  
D Mesons ◽  
Branching Ratios ◽  
Matrix Elements ◽  
Long Distance ◽  
Global Fit ◽  
Belle Ii ◽  
Cp Asymmetries

We study the non-leptonic two-body decays of D mesons decaying into one pseudoscalar meson (P) and one vector meson (V) in the factorization-asisted topological-amplitude approach. In this approach, the decay amplitudes are factorized into two parts, the short-distance contribution (Wilson coefficients) and the long-distance contribution (hadronic matrix elements). We predict the branching ratios of D → PV decays using a global fit with the non-perturbative parameters. Our results agree well with the experimental data. We also predict the direct CP asymmetries by combining short-distance dynamics associated with penguin operators and long-distance hadronic matrix elements determined by branching ratios. The large asymmetries in D+ → π+ρ0 and [Formula: see text] may be measurable in the LHCb and future Belle II experiments.

scholarly journals Rates of $$D^{*}_{0}(2400)$$, $$ D_J^*(3000) $$ as the $$D^{*}_{0}(2P)$$ and $$D^{*}_{0}(3P)$$ in B decays

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
Xiao-Ze Tan ◽  
Yue Jiang ◽  
Tianhong Wang ◽  
Tian Zhou ◽  
Geng Li ◽  
...  
Keyword(s):  
Experimental Data ◽  
Wave Function ◽  
Decay Rate ◽  
Production Rate ◽  
Branching Ratio ◽  
Lhcb Collaboration ◽  
B Decays ◽  
Final State ◽  
Meson Decays

Abstract In this paper, we use the instantaneous Bethe–Salpeter method to calculate the semi-leptonic and non-leptonic production of the orbitally excited scalar $$ D_0^* $$D0∗ in B meson decays. When the final state is 1P state $$ D_0^*(2400) $$D0∗(2400), our theoretical decay rate is consistent with experimental data. For $$ D_J^*(3000) $$DJ∗(3000) final state, which was observed by LHCb collaboration recently and here treated as the orbitally excited scalar $$D^{*}_{0}(2P)$$D0∗(2P), its rate is in the order of $$ 10^{-4} \sim 10^{-6}$$10-4∼10-6. We find the special node structure of $$D^{*}_{0}(2P)$$D0∗(2P) wave function possibly results in the suppression of its branching ratio and the abnormal uncertainty. The 3P states production rate is in the order of $$ 10^{-5}$$10-5.

CP violation measurements at ALEPH

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 603-606
Author(s):  
◽  
BRIAN AAGAARD PETERSEN
Keyword(s):  
Cp Violation ◽  
B Decays ◽  
Data Set ◽  
Inclusive B Decays ◽  
Z Decays ◽  
Hadronic Z Decays ◽  
Semileptonic Asymmetry ◽  
Cp Asymmetries

We use the full ALEPH data set at LEP1 of four million hadronic Z decays to measure CP asymmetries in the [Formula: see text] decay. From 23 [Formula: see text] decays the value [Formula: see text] is measured, while from two measurements of the semileptonic asymmetry a CP using inclusive b decays we obtain a CP =-0.013±0.026.

scholarly journals THE CKM MATRIX AND CP VIOLATION

2005 ◽  
Vol 20 (22) ◽  
pp. 5105-5118 ◽  
Author(s):  
ZOLTAN LIGETI
Keyword(s):  
Cp Violation ◽  
New Physics ◽  
Vector Mesons ◽  
B Decays ◽  
Ckm Matrix ◽  
Charmless B Decays ◽  
The Status ◽  
Recent Developments ◽  
Nonleptonic Decays ◽  
Cp Asymmetries

The status of CP violation and the CKM matrix is reviewed. Direct CP violation in B decay has been established and the measurement of sin 2β in ψK modes reached 5% accuracy. I discuss the implications of these, and of the possible deviations of the CP asymmetries in b → s modes from that in ψK. The first meaningful measurements of α and γ are explained, together with their significance for constraining both the SM and new physics in [Formula: see text] mixing. I also discuss implications of recent developments in the theory of nonleptonic decays for B → πK rates and CP asymmetries, and for the polarization in charmless B decays to two vector mesons.

scholarly journals Semi-leptonic production of DsJ(3040) and DJ(3000) in Bs and B decays

2017 ◽  
Vol 32 (03) ◽  
pp. 1750013 ◽  
Author(s):  
Si-Chen Li ◽  
Yue Jiang ◽  
Tian-Hong Wang ◽  
Qiang Li ◽  
Zhi-Hui Wang ◽  
...  
Keyword(s):  
Quantum Number ◽  
Branching Ratios ◽  
Lhcb Collaboration ◽  
Babar Collaboration ◽  
B Decays ◽  
Leptonic Decays ◽  
Number Formula

In this paper, we study the productions of the newly detected states [Formula: see text] and [Formula: see text] observed by BaBar Collaboration and LHCb Collaboration. We assume these states to be the [Formula: see text] and [Formula: see text] states with the quantum number [Formula: see text] in our work. The results of improved Bethe–Salpeter (BS) method indicate that the semi-leptonic decays via [Formula: see text] and [Formula: see text] into [Formula: see text] and [Formula: see text] have considerable branching ratios, for example, [Formula: see text], [Formula: see text], which shows that these semi-leptonic decays can be accessible in experiments.

scholarly journals Branching ratios and CP asymmetries of B decays to a vector and a pseudoscalar meson

2000 ◽  
Vol 473 (1-2) ◽  
pp. 141-147 ◽  
Author(s):  
N.G. Deshpande ◽  
B. Dutta ◽  
Sechul Oh
Keyword(s):  
Pseudoscalar Meson ◽  
Branching Ratios ◽  
B Decays ◽  
Cp Asymmetries

scholarly journals CHARMLESS HADRONIC B AND Bs DECAYS IN PERTURBATIVE QCD APPROACH

2008 ◽  
Vol 23 (21) ◽  
pp. 3250-3254 ◽  
Author(s):  
CAI-DIAN LÜ
Keyword(s):  
Vector Meson ◽  
Perturbative Qcd ◽  
Branching Ratios ◽  
Final States ◽  
B Decays ◽  
Breaking Effect ◽  
Decay Channels ◽  
Lhcb Experiment ◽  
The Future ◽  
Cp Asymmetries

We review the perturbative QCD approach study of hadronic B decays. Utilizing the constrained parameters in these well measured decay channels, we study most of the possible charmless Bs → PP, PV and VV decay channels in the perturbative QCD approach. In addition to the branching ratios and CP asymmetries, we also give predictions to the polarization fractions of the vector meson final states. The size of SU (3) breaking effect is also discussed. These predictions can be tested by the future LHCb experiment.

Sign in / Sign up

Export Citation Format

Share Document