QCD IN HADRONIC B DECAYS

2007 ◽  
Vol 22 (07n10) ◽  
pp. 615-621 ◽  
Author(s):  
CAI-DIAN LÜ
Keyword(s):  
Perturbative Qcd ◽  
Form Factors ◽  
Branching Ratios ◽  
Final States ◽  
Charmed Meson ◽  
B Decays ◽  
Cp Asymmetry ◽  
Charmless B Decays ◽  
The Right ◽  
Asymmetry Parameters

The perturbative QCD approach is based on kT factorization, including the Sudakov form factors so that to avoid the endpoint singularity. In this approach, we calculate the charmless B decays like B → ππ decays etc. to produce the right number of branching ratios and also CP asymmetry parameters. For final states with at least one charmed meson, like B → Dπ decays, our results also agree with the experiments.

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.

Charmless B decays to final states with radially excited vector mesons

2002 ◽  
Vol 540 (1-2) ◽  
pp. 97-103 ◽  
Author(s):  
Alakabha Datta ◽  
Harry J. Lipkin ◽  
Patrick J. O'Donnell
Keyword(s):  
Final States ◽  
Vector Mesons ◽  
B Decays ◽  
Charmless B Decays

scholarly journals SEMILEPTONIC B DECAYS INTO EXCITED CHARMED MESONS $(D_1,D^*_2)$ IN HQEFT

2001 ◽  
Vol 16 (14) ◽  
pp. 2505-2531 ◽  
Author(s):  
W. Y. WANG ◽  
Y. L. WU
Keyword(s):  
Branching Ratios ◽  
Effective Field ◽  
Wave Functions ◽  
Charmed Meson ◽  
B Decays ◽  
Charmed Mesons ◽  
Sum Rule ◽  
Rule Approach ◽  
Transition Wave ◽  
Semileptonic B Decays

Exclusive semileptonic B decays into excited charmed mesons [Formula: see text] are studied up to the order of 1/mQin the framework of the heavy quark effective field theory (HQEFT), which contains the contributions of both particles and antiparticles. Two wave functions [Formula: see text] and [Formula: see text], which characterize the contributions from the kinematic operator at the order of 1/mQ, are calculated by using QCD sum rule approach in HQEFT. Zero recoil values of other two wave functions [Formula: see text] and [Formula: see text] are extracted from the excited charmed-meson masses. Possible effects from the transition wave functions arising from the chromomagnetic operators at the order of 1/mQare analyzed. It is shown that the experimental measurements for the branching ratios of B→D1lν and [Formula: see text] can be understood in the framework of HQEFT.

scholarly journals Study of theψ(1S,2S)andηc(1S,2S)Weak Decays intoDM

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Junfeng Sun ◽  
Yueling Yang ◽  
Jinshu Huang ◽  
Lili Chen ◽  
Qin Chang
Keyword(s):  
Branching Ratios ◽  
Light Meson ◽  
Heavy Flavor ◽  
Final States ◽  
Charmed Meson ◽  
Matrix Elements ◽  
High Luminosity ◽  
Factorization Approach ◽  
Weak Decays ◽  
Qcd Factorization

Inspired by the recent measurements on theJ/ψ(1S)→Dsρ,DuK⁎weak decays at BESIII and the potential prospects of charmonium at high-luminosity heavy-flavor experiments, we studyψ(1S,2S)andηc(1S,2S)weak decays into final states including one charmed meson plus one light meson, considering QCD corrections to hadronic matrix elements with QCD factorization approach. It is found that the Cabibbo-favoredψ(1S,2S)→Ds-ρ+,Ds-π+,D¯u0K¯⁎0decays have large branching ratios≳10-10, which might be accessible at future experiments.

scholarly journals CP violation in non-leptonic $$B_c$$ decays to excited final states

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Tian Zhou ◽  
Tianhong Wang ◽  
Hui-Feng Fu ◽  
Zhi-Hui Wang ◽  
Lei Huo ◽  
...  
Keyword(s):  
Matrix Element ◽  
Cp Violation ◽  
Transition Matrix ◽  
Branching Ratios ◽  
Heavy Meson ◽  
Transition Matrix Element ◽  
Final States ◽  
Cp Asymmetry ◽  
Decay Channels ◽  
Decay Modes

AbstractWe study the CP violation in two-body nonleptonic decays of $$B_c$$ B c meson. We concentrate on the decay channels which contain at least one excited heavy meson in the final states. Specifically, the following channels are considered: $$B_c\rightarrow c{\bar{c}}(2S, 2P)+{\bar{c}}q(1S, 1P)$$ B c → c c ¯ ( 2 S , 2 P ) + c ¯ q ( 1 S , 1 P ) , $$B_c\rightarrow c{\bar{c}}(1S)+{\bar{c}}q(2S, 2P)$$ B c → c c ¯ ( 1 S ) + c ¯ q ( 2 S , 2 P ) , $$B_c\rightarrow c{\bar{c}}(1P)+{\bar{c}}q(2S)$$ B c → c c ¯ ( 1 P ) + c ¯ q ( 2 S ) , $$B_c\rightarrow c{\bar{c}}(1D)+{\bar{c}}q(1S, 1P)$$ B c → c c ¯ ( 1 D ) + c ¯ q ( 1 S , 1 P ) , and $$B_c\rightarrow c{\bar{c}}(3S)+{\bar{c}}q(1S)$$ B c → c c ¯ ( 3 S ) + c ¯ q ( 1 S ) . The improved Bethe-Salpeter method is applied to calculate the hadronic transition matrix element. Our results show that some decay modes have large branching ratios, which is of the order of $$10^{-3}$$ 10 - 3 . The CP violation effect in $$B_c \rightarrow \eta _c(1S)+D(2S)$$ B c → η c ( 1 S ) + D ( 2 S ) , $$B_c \rightarrow \eta _c(1S)+D_0^{*}(2P)$$ B c → η c ( 1 S ) + D 0 ∗ ( 2 P ) , and $$B_c \rightarrow J/\psi +D^{*}(2S)$$ B c → J / ψ + D ∗ ( 2 S ) are most likely to be found. If the detection precision of the CP asymmetry in such channels can reach the $$3\sigma $$ 3 σ level, at least $$10^7$$ 10 7 $$B_c$$ B c events are needed.

THE ANALYSIS OF B→ηK* AND B→ϕKS DECAYS IN A FLAVOR CHANGING Z′ MODEL

2008 ◽  
Vol 23 (24) ◽  
pp. 4039-4049 ◽  
Author(s):  
SHUAI-WEI WANG ◽  
YAO-BEI LIU ◽  
HAI-ZHEN SONG
Keyword(s):  
Branching Ratios ◽  
Time Dependent ◽  
Tree Level ◽  
Neutral Currents ◽  
Parameter Region ◽  
Cp Asymmetry ◽  
Flavor Changing ◽  
The Right ◽  
Flavor Changing Neutral Currents

We study the large branching ratios of B→ηK* decays and the time-dependent CP asymmetry SϕKS anomaly of B→ϕKS decay in a flavor changing Z′ model associated with flavor changing neutral currents at the tree level. Considering the right-handed flavor changing couplings and setting ξLL = ξRL = ξLR = ξRR = ξ, we obtain 0.011 < ξ < 0.0131, this parameter region could give a simultaneous explanation to these anomalies of B→ηK* and B→ϕKS decays. The results are consistent with the constraints and the assumptions of some references.

scholarly journals Factorization and polarization in two charmed-meson B decays

2006 ◽  
Vol 46 (2) ◽  
pp. 367-377 ◽  
Author(s):  
C.-H. Chen ◽  
C.-Q. Geng ◽  
Z.-T. Wei
Keyword(s):  
Charmed Meson ◽  
B Decays

scholarly journals Charmless B Decays to Baryons

1988 ◽  
Vol 535 (1 International) ◽  
pp. 352-357
Author(s):  
M. GRONAU
Keyword(s):  
B Decays ◽  
Charmless B Decays
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