scholarly journals New results on semileptonic $B$ decays and CKM matrix elements $|V_{cb}|$ and $|V_{ub}|$ at Belle

2019 ◽  
Author(s):  
Eiasha Waheed ◽  
Keyword(s):  
Matrix Elements ◽  
B Decays ◽  
Ckm Matrix ◽  
Ckm Matrix Elements ◽  
Semileptonic B Decays

Inclusive semileptonic B decays and |Vcb|: In memoriam Kolya Uraltsev

2015 ◽  
Vol 30 (10) ◽  
pp. 1543002 ◽  
Author(s):  
Paolo Gambino
Keyword(s):  
Present Status ◽  
Matrix Elements ◽  
B Decays ◽  
Ckm Matrix ◽  
Model Independent ◽  
In Memoriam ◽  
Ckm Matrix Elements ◽  
Semileptonic B Decays

The CKM matrix elements |Vcb| can be extracted from inclusive semileptonic B decays in a model independent way pioneered by Kolya Uraltsev and collaborators. I review here the present status and latest developments in this field.

scholarly journals B DECAYS ON THE LATTICE AND RESULTS FOR PHENOMENOLOGY

2005 ◽  
Vol 20 (16) ◽  
pp. 3651-3653
Author(s):  
MATTHEW WINGATE ◽  
CHRISTINE DAVIES ◽  
ALAN GRAY ◽  
EMEL GULEZ ◽  
JUNKO SHIGEMITSU ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Form Factors ◽  
Matrix Elements ◽  
B Decays ◽  
Ckm Matrix ◽  
Decay Constants ◽  
Lattice Monte Carlo ◽  
Ckm Matrix Elements ◽  
Fermion Action

Lattice Monte Carlo simulations now include the effects of 2 light sea quarks and 1 strange sea quark through the use of an improved staggered fermion action. Consequently, results important to phenomenology are free of the approximate 10% errors inherent in the quenched approximation. This talk reports on calculations of the B and Bs, decay constants and B → πℓν form factors. Accurate determinations of these quantities will lead to tighter constraints on CKM matrix elements.

Study of Radiative B Decay

1997 ◽  
Vol 12 (36) ◽  
pp. 2749-2755 ◽  
Author(s):  
H. Routh ◽  
V. P. Gautam
Keyword(s):  
Decay Width ◽  
Decay Process ◽  
Matrix Elements ◽  
B Decays ◽  
Ckm Matrix ◽  
Flavor Changing ◽  
Weak Annihilation ◽  
Ckm Matrix Elements ◽  
Inclusive Decay

Radiative B decays provide valuable information on some poorly known CKM matrix elements |Vtb| and |Vts|. So in our letter we propose to study the flavor changing radiative B decays corresponding to the inclusive b→ sγ and b→dγ decays. In this letter we discuss the radiative flavor changing B→ K**γ, Bs→ϕ;γ and the rare Bc→D*γ decays taking into account both the Penguin as well as weak annihilation contribution and it is found that weak annihilation contribution is negligible in case of decay of mesons consisting of light spectator, i.e. for B→K**γ and Bs→ϕ;γ but in case of decay of Bc→D*γ, weak annihilation contribution is the most dominating factor. It is also interesting to note that all the B→ K**γ, Bs→ϕ;γ and Bc→ D*γ decays have almost the same decay width because they have the same type of inclusive decay process b→ s(d)γ.

scholarly journals Progress on semi-leptonic B(s) decays

2014 ◽  
Vol 29 (20) ◽  
pp. 1430019 ◽  
Author(s):  
Giulia Ricciardi
Keyword(s):  
Rare Decays ◽  
Current Status ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
The Absolute ◽  
Ckm Matrix Elements

We report on the current status of semi-leptonic B(s) decays, including rare decays, and the extraction of the absolute values of the CKM matrix elements |Vcb| and |Vub|.

scholarly journals THE DUALIZED STANDARD MODEL AND ITS APPLICATIONS — AN INTERIM REPORT

1999 ◽  
Vol 14 (14) ◽  
pp. 2173-2203 ◽  
Author(s):  
HONG-MO CHAN ◽  
SHEUNG TSUN TSOU
Keyword(s):  
Standard Model ◽  
High Energy ◽  
Fermion Mass ◽  
Mass Hierarchy ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
High Energy Cosmic Rays ◽  
Perturbative Method ◽  
Ckm Matrix Elements ◽  
Physical Consequences

Based on a non-Abelian generalization of electric–magnetic duality, the Dualized Standard Model (DSM) suggests a natural explanation for exactly three generations of fermions as the "dual colour" [Formula: see text] symmetry broken in a particular manner. The resulting scheme then offers on the one hand a fermion mass hierarchy and a perturbative method for calculating the mass and mixing parameters of the Standard Model fermions, and on the other hand testable predictions for new phenomena ranging from rare meson decays to ultra-high energy cosmic rays. Calculations to one-loop order gives, at the cost of adjusting only three real parameters, values for the following quantities all (except one) in very good agreement with experiment: the quark CKM matrix elements ‖Vrs‖, the lepton CKM matrix elements ‖Urs‖, and the second generation masses mc, ms, mμ. This means, in particular, that it gives near maximal mixing Uμ3 between νμ and ντ as observed by SuperKamiokande, Kamiokande and Soudan, while keeping small the corresponding quark angles Vcb, Vts. In addition, the scheme gives (i) rough order-of-magnitude estimates for the masses of the lowest generation, (ii) predictions for low energy FCNC effects such as KL→ eμ, and (iii) a possible explanation for the long-standing puzzle of air showers beyond the GZK cut-off. All these together, however, still represent but a portion of the possible physical consequences derivable from the DSM scheme, the majority of which are yet to be explored.

Chapter 22 Leptonic, Semileptonic D(DS) Decays and CKM Matrix Elements

2009 ◽  
Vol 24 (supp01) ◽  
pp. 521-567
Author(s):  
Ya-Dong Yang ◽  
Hai-Bo Li ◽  
Jia-Heng Zou ◽  
Jiang-Chuan Chen ◽  
Jian Liu ◽  
...  
Keyword(s):  
Semileptonic Decays ◽  
Matrix Elements ◽  
Ckm Matrix ◽  
Leptonic Decays ◽  
Ckm Matrix Elements

The following sections are included: Leptonic Decays Semileptonic Decays Impact on CKM Measurements

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