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.

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.

Fundamental dynamics: Past, present and the future — like CP violation and EDMs

2015 ◽  
Vol 30 (10) ◽  
pp. 1543006 ◽  
Author(s):  
Ikaros I. Bigi
Keyword(s):  
Cp Violation ◽  
Perturbative Qcd ◽  
Heavy Flavor ◽  
Accurate Data ◽  
Fundamental Parameters ◽  
T Violation ◽  
The Future ◽  
The Impact ◽  
Cp Asymmetries

Working with Kolya Uraltsev was a real 'marvel' for me in general, but in particular about CP and T violation, QCD and its impact on transitions in heavy flavor hadrons and EDMs. The goal was — and still is — to define fundamental parameters for dynamics, how to measure them and compare SM forces with New Dynamics using the best tools including our brains. The correlations of them with accurate data were crucial for Kolya. Here is a review of CP asymmetries in B, D and τ decays, the impact of perturbative and non-perturbative QCD, about EDMs till 2013 — and for the future.

scholarly journals Υ(nS)→Bc⁎π,Bc⁎KDecays with Perturbative QCD Approach

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Junfeng Sun ◽  
Yueling Yang ◽  
Qin Chang ◽  
Gongru Lu ◽  
Jinshu Huang
Keyword(s):  
Elementary Particle ◽  
Standard Model ◽  
Perturbative Qcd ◽  
Weak Interactions ◽  
Branching Ratios ◽  
Electromagnetic Decay ◽  
Decay Modes ◽  
The Standard Model ◽  
The Future ◽  
The Absolute

Besides the traditional strong and electromagnetic decay modes,Υ(nS)meson can also decay through the weak interactions within the standard model of elementary particle. With anticipation of copiousΥ(nS)data samples at the running LHC and coming SuperKEKB experiments, the two-body nonleptonic bottom-changingΥ(nS)→Bc⁎π,Bc⁎Kdecays (n=1,2,3) are investigated with perturbative QCD approach firstly. The absolute branching ratios forΥ(nS)→Bc⁎πandBc⁎Kdecays are estimated to reach up to about10-10and10-11, respectively, which might possibly be measured by the 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.

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 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.

scholarly journals Search for Heavy Higgs Bosons in Fermionic Decay Channels with CMS

2018 ◽  
Vol 46 ◽  
pp. 1860058
Author(s):  
Ye Chen
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Confidence Level ◽  
Higgs Bosons ◽  
Final States ◽  
Centre Of Mass ◽  
Decay Channels ◽  
Upper Limits ◽  
The Standard Model ◽  
Cms Detector

Latest results of searches for heavy Higgs bosons in fermionic final states are presented using the CMS detector at the LHC. Results are based on pp collision data collected at centre-of-mass energies of 8 and 13 TeV which have been interpreted according to different extensions of the Standard Model such as MSSM, 2HDM, and NMSSM. These searches look for evidence of other scalar or pseudoscalar bosons, in addition to the observed SM-like 125 GeV Higgs boson, and set 95% confidence level upper limits in fermionic final states and benchmark models explored. The talk reviews briefly the major results obtained by the CMS Collaboration during Run I, and presents the most recent searches performed during Run II.

scholarly journals Mixing-induced CP asymmetries in inclusive B decays

1997 ◽  
Vol 393 (1-2) ◽  
pp. 132-142 ◽  
Author(s):  
M. Beneke ◽  
G. Buchalla ◽  
I. Dunietz
Keyword(s):  
B Decays ◽  
Inclusive B Decays ◽  
Cp Asymmetries
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