scholarly journals Sum Rules for Leading and Subleading Form Factors in Heavy Quark Effective Theory using the Non-forward Amplitude

2006 ◽  
Author(s):  
F. Jugeau
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Form Factors ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Forward Amplitude

scholarly journals Bounds on Heavy-to-Heavy Weak Decay Form Factors

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 416-418
Author(s):  
Cheng-Wei Chiang
Keyword(s):  
Heavy Quark ◽  
Lower Bounds ◽  
Sum Rules ◽  
Form Factors ◽  
Weak Decay ◽  
Upper And Lower Bounds ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
First Order ◽  
Decay Form

We provide upper and lower bounds on the semileptonic weak decay form factors for B → D(*) and Λb → Λc decays by utilizing inclusive heavy quark effective theory sum rules. These bounds are calculated to second order in ΛQCD/mQ and first order in αs. The [Formula: see text] corrections to the bounds at zero recoil are also presented.

Baryon sum rules in the heavy quark effective theory

1993 ◽  
Vol 301 (2-3) ◽  
pp. 243-248 ◽  
Author(s):  
E. Bagan ◽  
M. Chabab ◽  
H.G. Dosch ◽  
S. Narison
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Effective Theory ◽  
Heavy Quark Effective Theory

scholarly journals corrections to heavy baryon masses in the heavy quark effective theory sum rules

1996 ◽  
Vol 371 (1-2) ◽  
pp. 99-104 ◽  
Author(s):  
Yuan-ben Dai ◽  
Chao-shang Huang ◽  
Chun Liu ◽  
Cai-dian Lü
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Heavy Baryon ◽  
Effective Theory ◽  
Heavy Quark Effective Theory

scholarly journals HQET form factors for Bs → Klv decays beyond leading order

2018 ◽  
Vol 175 ◽  
pp. 13025
Author(s):  
Debasish Banerjee ◽  
Mateusz Koren ◽  
Hubert Simma ◽  
Rainer Sommer
Keyword(s):  
Form Factor ◽  
Heavy Quark ◽  
Form Factors ◽  
Good Control ◽  
Effective Theory ◽  
Ratio Method ◽  
Heavy Quark Effective Theory ◽  
Leading Order ◽  
Decay Form ◽  
Static Order

We compute semi-leptonic Bs decay form factors using Heavy Quark Effective Theory on the lattice. To obtain good control of the 1 /mb expansion, one has to take into account not only the leading static order but also the terms arising at O (1/mb): kinetic, spin and current insertions. We show results for these terms calculated through the ratio method, using our prior results for the static order. After combining them with non-perturbative HQET parameters they can be continuum-extrapolated to give the QCD form factor correct up to O (1/[see formula in PDF]) corrections and without O (αs(mb)n) corrections.

B → K* ℓ+ ℓ- DECAYS WITH POLARIZED K*

2003 ◽  
Vol 18 (08) ◽  
pp. 1443-1448
Author(s):  
C. H. CHEN ◽  
C. Q. GENG
Keyword(s):  
Standard Model ◽  
Heavy Quark ◽  
B Meson ◽  
Form Factors ◽  
Decay Chain ◽  
New Physics ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
B Meson Decays ◽  
The Standard Model

We study the exclusive decays of B → K* ℓ+ ℓ- within the framework of the PQCD. We obtain the form factors for the B → K* transition in the large recoil region, where the PQCD for heavy B meson decays is reliable. We find that the form factors at q2 = 0 are consistent with those from the large energy effective theory combined with the heavy quark effective theory and the experiment of B → K*γ. Via the decay chain of B → K* (Kπ) ℓ+ ℓ-, we can study many physical observables which are related to the different helicity combinations of B → K* ℓ+ ℓ-, such as the forward-backward asymmetries (FBAs). In particular, we can study the T violating effect which is small in the standard model but can be up to 10% in models with new physics.

scholarly journals The Isgur-Wise function to O(αs) from sum rules in the heavy quark effective theory

1993 ◽  
Vol 301 (2-3) ◽  
pp. 249-256 ◽  
Author(s):  
E. Bagan ◽  
Patricia Ball ◽  
P. Gosdzinsky
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Effective Theory ◽  
Heavy Quark Effective Theory
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