scholarly journals Measurement of branching fractions of B decays to K1(1270)π and K1(1400)π and determination of the CKM angle α from B0→ a1(1260)± π∓

2011 ◽  
Author(s):  
Simone Stracka
Keyword(s):  
Branching Fractions ◽  
B Decays ◽  
Ckm Angle

scholarly journals STATUS OF THE HADRONIC τ DETERMINATION OF Vus

2008 ◽  
Vol 23 (21) ◽  
pp. 3191-3195 ◽  
Author(s):  
K. MALTMAN ◽  
C. E. WOLFE ◽  
S. BANERJEE ◽  
M. RONEY ◽  
I. NUGENT
Keyword(s):  
Sum Rules ◽  
Branching Fractions ◽  
Sum Rule ◽  
Slow Convergence ◽  
Decay Data ◽  
Decay Modes ◽  
Good Agreement

We update the extraction of Vus from hadronic τ decay data in light of recent BaBar and Belle results on the branching fractions of a number of important strange decay modes. A range of sum rule analyses is employed, particular attention being paid to those based on “non-spectral weights”, developed previously to bring the slow convergence of the relevant integrated D = 2 OPE series under improved control. Results from the various sum rules are in good agreement with one another, but ~ 3σ below expectations based on 3-family unitarity.

scholarly journals On the determination of a1 and a2 from hadronic two body B decays

1994 ◽  
Vol 333 (3-4) ◽  
pp. 507-513 ◽  
Author(s):  
M. Gourdin ◽  
A.N. Kamal ◽  
Y.Y. Keum ◽  
X.Y. Pham
Keyword(s):  
B Decays

τ LEPTON PHYSICS

1998 ◽  
Vol 13 (05) ◽  
pp. 695-739 ◽  
Author(s):  
GHITA RAHAL-CALLOT
Keyword(s):  
Neutral Current ◽  
Branching Fractions ◽  
New Physics ◽  
Precise Determination ◽  
Energy Scale ◽  
Hadronic Decay ◽  
Charged Current ◽  
Beyond The Standard Model ◽  
Decay Channels

General properties of the τ leptons are reviewed using the recent measurements of production and decay of τ leptons. The improvements in the knowledge of the τ mass and the limits on ντ mass are reported. New improved measurements of the τ polarization and asymmetries performed at LEP and SLC prove a measurement of the axial and vector part of the neutral current at the per mil level. For the leptonic charged current, no deviation from the V–A Lorentz structure of the current is observed. Improvements on the lifetime and leptonic branching fractions allow a check of the charged current universality at the 0.5% level. New hadronic decay channels have been measured, mainly those involving kaons and η mesons. A precise determination of αs at the τ mass energy scale is performed. Finally, tests of possible new physics beyond the Standard Model are discussed.

scholarly journals Measurement of the branching fractions forD0→π−e+νeandD0→K−e+νeand determination of ‖Vcd/Vcs‖2

1989 ◽  
Vol 62 (16) ◽  
pp. 1821-1824 ◽  
Author(s):  
J. Adler ◽  
J. J. Becker ◽  
G. T. Blaylock ◽  
T. Bolton ◽  
J.-C. Brient ◽  
...  
Keyword(s):  
Branching Fractions

scholarly journals CHARM AND CHARMONIUM SPECTROSCOPY FROM B-FACTORIES

2006 ◽  
Vol 21 (27) ◽  
pp. 5601-5609 ◽  
Author(s):  
ANTIMO PALANO
Keyword(s):  
Branching Fractions ◽  
Initial State Radiation ◽  
B Decays ◽  
Initial State ◽  
Text Production ◽  
State Radiation ◽  
Babar Experiment

New and recent results are presented on charm and charmonium spectroscopy from BABAR experiment at SLAC. In particular, measurements on DsJ states branching fractions have been performed both in B-decays and inclusive [Formula: see text] interactions. Here a search for Dsj(2632) has been performed and a new DsJ state at a mass of 2.856 GeV /c2 has been observed. A search for Y(4260) has been performed in exclusive [Formula: see text] production from initial-state radiation.

scholarly journals QUARK MIXING AND CP VIOLATION — THE CKM MATRIX

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1724-1737 ◽  
Author(s):  
ULRICH NIERSTE
Keyword(s):  
Neutral Current ◽  
New Physics ◽  
Tree Level ◽  
B Decays ◽  
Ckm Matrix ◽  
Penguin Decays ◽  
The Status ◽  
First Results ◽  
Global Fit

I summarize the theoretical progress in the determination of the CKM elements since Lepton-Photon 2003 and present the status of the elements and parameters of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. One finds |Vus| = 0.2227 ± 0.0017 from K and τ decays and |Vcb| = (41.6 ± 0.5) · 10-3 from inclusive semileptonic B decays. The unitarity triangle can now be determined from tree-level quantities alone and the result agrees well with the global fit including flavour-changing neutral current (FCNC) processes, which are sensitive to new physics. From the global fit one finds the three CKM angles θ12 = 12.9° ± 0.1°, θ23 = 2.38° ± 0.03° and θ13 = 0.223° ± 0.007° in the standard PDG convention. The CP phase equals [Formula: see text] at 1σ CL and [Formula: see text] at 2σ CL. A major progress are first results from fully unquenched lattice QCD computations for the hadronic quantities entering the UT fit. I further present the calculation of three-loop QCD corrections to the charm contribution in [Formula: see text] decays, which removes the last relevant theoretical uncertainty from the [Formula: see text] system. Finally I discuss mixing-induced CP asymmetries in [Formula: see text] penguin decays, whose naive average is below its Standard Model value by 3σ.

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