scholarly journals MEASUREMENT OF THE CKM MATRIX ELEMENT |V(UB)| WITH CHARMLESS EXCLUSIVE SEMILEPTONIC B MESON DECAYS AT BABAR

2002 ◽  
Author(s):  
Leif H Wilden
Keyword(s):  
Matrix Element ◽  
B Meson ◽  
B Meson Decays ◽  
Ckm Matrix ◽  
Meson Decays

CKM MATRIX ELEMENT MAGNITUDES

2004 ◽  
Vol 19 (07) ◽  
pp. 1004-1016 ◽  
Author(s):  
K. R. SCHUBERT
Keyword(s):  
Matrix Element ◽  
Cp Violation ◽  
B Meson ◽  
Matrix Elements ◽  
Perfect Agreement ◽  
B Meson Decays ◽  
Ckm Matrix ◽  
Cp Violations ◽  
The Matrix ◽  
Cp Symmetry

The present status of experimental results for the magnitudes of Cabibbo-Kobayashi-Maskawa matrix elements is reviewed and used for a unitarity test. The matrix is found to be unitary within ±1.8 standard deviations. The matrix violates CP-symmetry and the size of its CP-violation, as derived from only magnitude measurements and unitarity, is in perfect agreement with the observed CP-violations in K and B meson decays.

CP VIOLATION IN B-MESON DECAYS

2005 ◽  
Vol 20 (02n03) ◽  
pp. 385-398
Author(s):  
KLAUS R. SCHUBERT
Keyword(s):  
Cp Violation ◽  
B Meson ◽  
Unitarity Triangle ◽  
Short Introduction ◽  
B Meson Decays ◽  
Ckm Matrix ◽  
Meson Decays ◽  
Babar Experiment ◽  
Cp Asymmetries

After a short introduction on CP asymmetries in K and B meson decays, I discuss a few recent results related to CP violation, mainly from the BABAR experiment: CPT tests in [Formula: see text] mixing, search for CP violation in [Formula: see text] and [Formula: see text] decays, and measurements of the unitarity-triangle angle α in B →ππ and B →ρρ decays. I conclude with the result of a CKM-matrix fit to all relevant observations.

DETERMINATION OF |Vub| FROM TAGGED AND UNTAGGED $B \overline{B}$ EVENTS WITH THE BABAR DETECTOR

2005 ◽  
Vol 20 (16) ◽  
pp. 3707-3711
Author(s):  
◽  
JOCHEN DINGFELDER
Keyword(s):  
Matrix Element ◽  
Decay Rate ◽  
B Meson ◽  
Theoretical Models ◽  
Branching Ratios ◽  
High Signal ◽  
B Meson Decays ◽  
Ckm Matrix ◽  
Babar Detector

Measurements of charmless semileptonic B-meson decays and the CKM matrix element |Vub| are reported based on a sample of 88 million [Formula: see text] events recorded with the BABAR detector. Decays B → Xuℓν are selected from both tagged and untagged [Formula: see text] events and separated from the dominant charm background, B → Xcℓν, using different kinematic variables: the lepton momentum Eℓ, the squared four-momentum transfer q2, and the hadronic mass mX. The extrapolation to the total decay rate to determine |Vub| is performed for different theoretical models. We have also measured branching ratios for the exclusive semileptonic decays B → π(ρ,ω,η,η′,a0)ℓν, where a high signal purity is reached by fully or partially reconstructing the second B meson.

scholarly journals Lepton flavor non-universality in B-meson decays from a U(2) flavor model

2015 ◽  
Vol 2015 (11) ◽  
Author(s):  
Adam Falkowski ◽  
Marco Nardecchia ◽  
Robert Ziegler
Keyword(s):  
B Meson ◽  
B Meson Decays ◽  
Meson Decays ◽  
Lepton Flavor

scholarly journals |Vub| Determination by B → Dsπ

2003 ◽  
Vol 18 (22) ◽  
pp. 1557-1567 ◽  
Author(s):  
Hideaki Hayakawa ◽  
Kaoru Hosokawa ◽  
Takeshi Kurimoto
Keyword(s):  
Perturbative Qcd ◽  
B Meson ◽  
B Meson Decays ◽  
Meson Decays ◽  
Factorizable Contribution

We investigate [Formula: see text] decay in perturbative QCD approach which has recently been applied to B-meson decays. [Formula: see text] decay (and its charge conjugated mode) can be one of the hopeful modes to determine |Vub| since it occurs through b → u transition only. We estimate both factorizable and non-factorizable contribution, and show that the non-factorizable contribution is much less than the factorizable one. Our calculation gives [Formula: see text].

scholarly journals Composite leptoquarks and anomalies in B-meson decays

2015 ◽  
Vol 2015 (5) ◽  
Author(s):  
Ben Gripaios ◽  
M. Nardecchia ◽  
S. A. Renner
Keyword(s):  
B Meson ◽  
B Meson Decays ◽  
Meson Decays
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