scholarly journals Gravitational form factors of light mesons

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
Adam Freese ◽  
Ian C. Cloët
Keyword(s):  
Form Factors ◽  
Light Mesons

INFRARED RENORMALON EFFECTS ON LIGHT MESONS ELECTROMAGNETIC TRANSITION FORM FACTOR FMγ*(Q2, ω)

2003 ◽  
Vol 18 (07) ◽  
pp. 1023-1050 ◽  
Author(s):  
YEGANA V. MAMEDOVA
Keyword(s):  
Form Factor ◽  
Perturbative Qcd ◽  
Transition Form Factor ◽  
Form Factors ◽  
Transition Form ◽  
Coupling Constant ◽  
Electromagnetic Transition ◽  
Qcd Factorization ◽  
Factorization Formula ◽  
Light Mesons

The light pseudoscalar π0, η and η′ mesons electromagnetic transition γ* + γ* → M form factors FMγ*(Q2,ω) are calculated, applying the perturbative QCD factorization formula and the frozen coupling constant approximation. In the computations the O(αS) order expression for FMγ*(Q2,ω) and the mesons' infrared renormalon corrected distribution amplitudes are used. In the case of the η and η′ mesons, the SUf(3) ordinary octet-singlet mixing scheme is utilized. Comparisons are made with the results obtained, employing the mesons' ordinary distribution amplitudes and with γ + γ* → M transition form factors.

scholarly journals Quark loop effects in semileptonic form factors for heavy-light mesons

2004 ◽  
Vol 129-130 ◽  
pp. 364-365 ◽  
Author(s):  
C. Bernard ◽  
C. DeTar ◽  
Steven Gottlieb ◽  
E.B. Gregory ◽  
U.M. Heller ◽  
...  
Keyword(s):  
Form Factors ◽  
Quark Loop ◽  
Light Mesons

scholarly journals Isgur–Wise function and a new approach to potential model

2016 ◽  
Vol 31 (35) ◽  
pp. 1650189 ◽  
Author(s):  
Tapashi Das ◽  
D. K. Choudhury ◽  
K. K. Pathak
Keyword(s):  
Wave Function ◽  
Ground State ◽  
Potential Model ◽  
Form Factors ◽  
Mass Limit ◽  
Finite Mass ◽  
New Approach ◽  
Cornell Potential ◽  
Integration Limit ◽  
Light Mesons

Considering the Cornell potential [Formula: see text], we have revisited the Dalgarno’s method of perturbation by incorporating two scales [Formula: see text] and [Formula: see text] as integration limit so that the perturbative procedure can be improved in a potential model. With the improved version of the wave function the ground state masses of the heavy–light mesons [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] are computed. The slopes and curvatures of the form factors of semileptonic decays of heavy–light mesons in both HQET limit and finite mass limit are calculated and compared with the available data.

scholarly journals Light-front holographic radiative transition form factors for light mesons

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
Mohammad Ahmady ◽  
Satvir Kaur ◽  
Chandan Mondal ◽  
Ruben Sandapen
Keyword(s):  
Form Factors ◽  
Radiative Transition ◽  
Light Front ◽  
Transition Form ◽  
Light Mesons

scholarly journals PHENOMENOLOGICAL BOUNDS ON B TO LIGHT SEMILEPTONIC FORM FACTORS

1998 ◽  
Vol 13 (23) ◽  
pp. 1845-1852 ◽  
Author(s):  
D. FALCONE ◽  
N. TANCREDI ◽  
F. TRAMONTANO ◽  
P. SANTORELLI
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Qcd Sum Rules ◽  
Lattice Calculations ◽  
Light Mesons

The form factors for the weak currents between B and light mesons are studied by relating them to the corresponding D form factors at [Formula: see text] according to HQET, by evaluating them at q2=0 by QCD sum rules, and by assuming a polar q2 dependence. The results found are consistent with the information obtained from exclusive non-leptonic two-body decays and, with the only exception of A1, with lattice calculations.

scholarly journals B(s), D(s)→ π, K, η, ρ, K*, ω, ϕ TRANSITION FORM FACTORS AND DECAY RATES WITH EXTRACTION OF THE CKM PARAMETERS |Vub|, |Vcs|, |Vcd|

2006 ◽  
Vol 21 (30) ◽  
pp. 6125-6172 ◽  
Author(s):  
Y. L. WU ◽  
M. ZHONG ◽  
Y. B. ZUO
Keyword(s):  
Heavy Quark ◽  
Radiative Decay ◽  
Form Factors ◽  
Effective Field ◽  
Decay Rates ◽  
Light Meson ◽  
Meson Mass ◽  
Transition Form ◽  
Systematic Calculation ◽  
Light Mesons

A systematic calculation for the transition form factors of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) is carried out by using light-cone sum rules in the framework of heavy quark effective field theory. The heavy quark symmetry at the leading order of 1/mQexpansion enables us to reduce the independent wave functions and establish interesting relations among form factors. Some relations hold for the whole region of momentum transfer. The meson distribution amplitudes up to twist-4 including the contributions from higher conformal spin partial waves and light meson mass corrections are considered. The CKM matrix elements |Vub|, |Vcs| and |Vcd| are extracted from some relatively well-measured decay channels. A detailed prediction for the branching ratios of heavy to light meson decays is then presented. The resulting predictions for the semileptonic and radiative decay rates of heavy to light mesons (B, Bs, D, Ds→ π, K, η, ρ, K*, ω, ϕ) are found to be compatible with the current experimental data and can be tested by more precise experiments at B-factory, LHCb, BEPCII and CLEOc.

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