scholarly journals First lattice calculation of radiative leptonic decay rates of pseudoscalar mesons

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
A. Desiderio ◽  
R. Frezzotti ◽  
M. Garofalo ◽  
D. Giusti ◽  
M. Hansen ◽  
...  
Keyword(s):  
Leptonic Decay ◽  
Decay Rates ◽  
Lattice Calculation ◽  
Pseudoscalar Mesons

scholarly journals Electromagnetic corrections to the leptonic decay rates of charged pseudoscalar mesons: lattice results

2016 ◽  
Author(s):  
Silvano Simula ◽  
Vittorio Lubicz ◽  
Guido Martinelli ◽  
Christopher Sachrajda ◽  
Francesco Sanfilippo ◽  
...  
Keyword(s):  
Leptonic Decay ◽  
Decay Rates ◽  
Pseudoscalar Mesons

scholarly journals First Lattice Calculation of the QED Corrections to Leptonic Decay Rates

2018 ◽  
Vol 120 (7) ◽  
Author(s):  
D. Giusti ◽  
V. Lubicz ◽  
C. Tarantino ◽  
G. Martinelli ◽  
C. T. Sachrajda ◽  
...  
Keyword(s):  
Leptonic Decay ◽  
Decay Rates ◽  
Lattice Calculation

scholarly journals Light-meson leptonic decay rates in lattice QCD+QED

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
M. Di Carlo ◽  
G. Martinelli ◽  
D. Giusti ◽  
V. Lubicz ◽  
C. T. Sachrajda ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Leptonic Decay ◽  
Decay Rates ◽  
Light Meson

Mass spectrum and leptonic decay constants of ground and radially excited states of ηc and ηb in a Bethe–Salpeter equation framework

2015 ◽  
Vol 24 (04) ◽  
pp. 1550030 ◽  
Author(s):  
Hluf Negash ◽  
Shashank Bhatnagar
Keyword(s):  
Mass Spectrum ◽  
Excited States ◽  
Ground State ◽  
Reasonable Agreement ◽  
Equal Mass ◽  
Leptonic Decay ◽  
Decay Constants ◽  
Pseudoscalar Mesons

In this paper, we study the mass spectrum and decay constants of ground state (1S) and radially excited states (2S and 3S) of heavy equal mass pseudoscalar mesons, ηc and ηb. We have employed the framework of Bethe–Salpeter equation (BSE) under Covariant Instantaneous Ansatz (CIA). Our predictions are in reasonable agreement with the data on available states and results of other models.

Strangeness-Changing Leptonic Decay Rates for theΣ±Hyperons

1971 ◽  
Vol 4 (3) ◽  
pp. 631-635 ◽  
Author(s):  
J. Cole ◽  
J. Lee-Franzini ◽  
R. J. Loveless ◽  
C. Baltay ◽  
P. Franzini ◽  
...  
Keyword(s):  
Leptonic Decay ◽  
Decay Rates

WEAK LEPTONIC DECAY OF LIGHT AND HEAVY PSEUDOSCALAR MESONS IN A FIELD-THEORETIC QUARK MODEL

1993 ◽  
Vol 08 (29) ◽  
pp. 2775-2783 ◽  
Author(s):  
L. MAHARANA ◽  
A. NATH ◽  
A. R. PANDA
Keyword(s):  
Harmonic Oscillator ◽  
Quark Model ◽  
Constituent Quark ◽  
Leptonic Decay ◽  
Decay Constants ◽  
Quark Masses ◽  
Leptonic Decays ◽  
Pseudoscalar Mesons ◽  
Oscillator Wave Function ◽  
Harmonic Oscillator Wave Function

Weak leptonic decays of light and heavy pseudoscalar mesons are studied in a field-theoretic quark model where the mesons are described by constituent quarks and antiquarks with a particular ansatz and a Harmonic oscillator wave function. With constituent quark masses and Harmonic oscillator radii for mesons as parameters of the model, decay constants are calculated and found as (fπ, fk, fD, fB) = (132 MeV , 161 MeV , 160 MeV , 115 MeV ) indicating a reasonable agreement with the experimental data wherever available. Partial decay widths and branching ratios for kinematically allowed leptonic decay processes are also estimated and compared with the experiments wherever available.

scholarly journals Mixed QCD-EW corrections for Higgs leptonic decay via HW+W− vertex

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Chichuan Ma ◽  
Yuxuan Wang ◽  
Xiaofeng Xu ◽  
Li Lin Yang ◽  
Bin Zhou
Keyword(s):  
Differential Equations ◽  
Production Process ◽  
Canonical Basis ◽  
Intersection Theory ◽  
Leptonic Decay ◽  
Decay Rates ◽  
Decay Process ◽  
Higgs Production ◽  
Multiple Polylogarithms ◽  
Analytic Expressions

Abstract We consider the two-loop corrections to the HW+W− vertex at order ααs. We construct a canonical basis for the two-loop integrals using the Baikov representation and the intersection theory. By solving the ϵ-form differential equations, we obtain fully analytic expressions for the master integrals in terms of multiple polylogarithms, which allow fast and accurate numeric evaluation for arbitrary configurations of external momenta. We apply our analytic results to the decay process H → νeeW, and study both the integrated and differential decay rates. Our results can also be applied to the Higgs production process via W boson fusion.

scholarly journals Hyperfine Splitting and Leptonic Decay Rates in Heavy Quarkonia

2003 ◽  
Vol 18 (23) ◽  
pp. 1597-1600 ◽  
Author(s):  
D. Ebert ◽  
R. N. Faustov ◽  
V. O. Galkin
Keyword(s):  
Experimental Data ◽  
Hyperfine Splitting ◽  
Belle Collaboration ◽  
Leptonic Decay ◽  
Decay Rates ◽  
Heavy Quarkonia ◽  
Radiative Corrections

The hyperfine splitting in heavy quarkonia is considered in its relation to the leptonic decay rates with the account of relativistic and radiative corrections. The calculated decay rates agree well with the available experimental data, while the predicted ηc(2S) mass is significantly smaller than the value measured recently by the Belle collaboration.

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