scholarly journals Precision measurement of the form factors of the semileptonic decay $K^{±} → π^{0} l^{ ±} ν$ (Kl3)

2019 ◽  
Author(s):  
Roberto Piandani ◽  
Keyword(s):  
Precision Measurement ◽  
Semileptonic Decay ◽  
Form Factors

Strong-interaction effects on the baryon semileptonic decay form factors

1988 ◽  
Vol 37 (11) ◽  
pp. 3197-3205 ◽  
Author(s):  
Larry J. Carson ◽  
Robert J. Oakes ◽  
Charles R. Willcox
Keyword(s):  
Strong Interaction ◽  
Semileptonic Decay ◽  
Form Factors ◽  
Interaction Effects ◽  
Decay Form

scholarly journals Kaon semileptonic decay form factors in two-flavor QCD

2005 ◽  
Author(s):  
Naoto Tsutsui ◽  
Sinya Aoki ◽  
M. Fukugita ◽  
Shoji Hashimoto ◽  
K-I. Ishikawa ◽  
...  
Keyword(s):  
Semileptonic Decay ◽  
Form Factors ◽  
Decay Form

scholarly journals D → Klv semileptonic decay using lattice QCD with HISQ at physical pion masses

2018 ◽  
Vol 175 ◽  
pp. 13027 ◽  
Author(s):  
Bipasha Chakraborty ◽  
Christine Davies ◽  
Jonna Koponen ◽  
G Peter Lepage
Keyword(s):  
Standard Model ◽  
Lattice Qcd ◽  
Semileptonic Decay ◽  
Light Quark ◽  
Form Factors ◽  
New Physics ◽  
Ckm Matrix ◽  
Quark Masses ◽  
The Standard Model ◽  
Fertile Ground

he quark flavor sector of the Standard Model is a fertile ground to look for new physics effects through a unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix. We present a lattice QCD calculation of the scalar and the vector form factors (over a large q2 region including q2 = 0) associated with the D→ Klv semi-leptonic decay. This calculation will then allow us to determine the central CKM matrix element, Vcs in the Standard Model, by comparing the lattice QCD results for the form factors and the experimental decay rate. This form factor calculation has been performed on the Nf = 2 + 1 + 1 MILC HISQ ensembles with the physical light quark masses.

scholarly journals Detailed study of the Λb → Λcτν̄τ decay

2018 ◽  
Vol 33 (29) ◽  
pp. 1850169 ◽  
Author(s):  
E. Di Salvo ◽  
F. Fontanelli ◽  
Z. J. Ajaltouni
Keyword(s):  
Standard Model ◽  
Semileptonic Decay ◽  
Form Factors ◽  
Higgs Doublet ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Left Handed ◽  
The Standard Model ◽  
Analogous Formula ◽  
Two Higgs Doublet Model

We examine in detail the semileptonic decay [Formula: see text], which may confirm previous hints, from the analogous [Formula: see text] decay, of a new physics beyond the Standard Model. First of all, starting from rather general assumptions, we predict the partial width of the decay. Then we analyze the effects of five possible new physics interactions, adopting in each case five different form factors. In particular, for each term beyond the Standard Model, we find some constraints on the strength and phase of the coupling, which we combine with those found by other authors in analyzing the analogous semileptonic decays of [Formula: see text]. Our analysis involves some dimensionless quantities, substantially independent of the form factor, but which, owing to the constraints, turn out to be strongly sensitive to the kind of nonstandard interaction. We also introduce a criterion thanks to which one can discriminate among the various new physics terms: the left-handed current and the two-Higgs-doublet model appear privileged, with a neat preference for the former interaction. Finally, we suggest a differential observable that could, in principle, help to distinguish between the two cases.

ωb semileptonic decay form factors for mc≠∞

1991 ◽  
Vol 254 (3-4) ◽  
pp. 468-473 ◽  
Author(s):  
C Glenn Boyd ◽  
David E Brahm
Keyword(s):  
Semileptonic Decay ◽  
Form Factors ◽  
Decay Form

scholarly journals D meson semileptonic decay form factors at $q^2 = 0$

2019 ◽  
Author(s):  
Ruizi Li ◽  
A. Bazavov ◽  
C. DeTar ◽  
C.W. Bernard ◽  
D. Du ◽  
...  
Keyword(s):  
Semileptonic Decay ◽  
D Meson ◽  
Form Factors ◽  
Decay Form
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