The strong coupling constants of negative parity heavy baryons belonging to sextet and antitriplet representations of SUf(3) with light π and K mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only one corresponding function. The pollution arising from the positive to positive, positive to negative, and negative to positive parity baryons transitions is eliminated by constructing sum rules for different Lorentz structures. The obtained coupling constants are compared with the ones for the positive parity heavy baryons

Leipsic, Jonathon

Willson, Alexander

Achenbach, Stephan

Min, James

LaBounty, Troy

Gurvitch, Ronen

Toggweiler, Stefan

Binder, Ronald

Moss, Robert

Cury, Ricardo

Thompson, Christopher

norgaard, bjarne

Poulter, Rohan

Wood, David

Webb, John

arXiv

The strong coupling constants of negative parity heavy baryons belonging to sextet and antitriplet representations of SUf(3) with light pi and K mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only one corresponding function. The pollution arising from the positive to positive, positive to negative, and negative to positive parity baryons transitions is eliminated by constructing sum rules for different Lorentz structures. The obtained coupling constants are compared with the ones for the positive parity heavy baryons

Alıyev, Tahmasıb

Bilmiş, Selçuk

Savcı, Mustafa

OpenMETU (Middle East Technical University)

Advances in High Energy Physics

Strong Coupling Constants of Negative Parity Heavy Baryons with pi and K Mesons

The strong coupling constants of negative parity heavy baryons belonging to sextet and antitriplet representations of SUf(3) with light π and K mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only one corresponding function. The pollution arising from the positive to positive, positive to negative, and negative to positive parity baryons transitions is eliminated by constructing sum rules for different Lorentz structures. The obtained coupling constants are compared with the ones for the positive parity heavy baryons.</jats:p

T. M. Aliev

S. Bilmis

M. Savci

Crossref

Strong Coupling Constants of Negative Parity Heavy Baryons with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>π</mml:mi></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>K</mml:mi></mml:mrow></mml:math> Mesons

Directory of Open Access Journals

Strong Coupling Constants of Negative Parity Heavy Baryons with π and K Mesons

Elsevier - Publisher Connector 

Imaging
E1200
JACC March 27, 2012
Volume 59, Issue 13
COMPARISON OF MDCT MEASUREMENTS OF AORTIC ANNULUS SIZE IN SYSTOLE AND DIASTOLE: A 
MULTICENTER EVALUATION
ACC Moderated Poster Contributions
McCormick Place South, Hall A
Saturday, March 24, 2012, 9:30 a.m.-10:30 a.m.
Session Title: Imaging: CT- Valve Imaging
Abstract Category: 24. Imaging: CT
Presentation Number: 1111-514
Authors: Jonathon Leipsic, Alexander Willson, Stephan Achenbach, James Min, Troy LaBounty, Ronen Gurvitch, Stefan Toggweiler, Ronald Binder, 
Robert Moss, Ricardo Cury, Christopher Thompson, bjarne norgaard, Rohan Poulter, David Wood, John Webb, UBC, Vancouver, Canada
Background: Measurement of aortic annular size is critical for prosthesis sizing in transcatheter aortic valve implantation (TAVI). Multi-Detector CT 
(MDCT) can be used to derive aortic annulus dimensions. Changes of MDCT-derived annulus dimensions between systole and diastole are unknown. 
We analyzed changes of the aortic annulus diameters, area and circumference during the cardiac cycle in patients scheduled for TAVI.
Methods:  75 patients planned for TAVI were analyzed. To measure aortic annular dimensions), multiplanar reconstructions were rendered in a 
double-oblique plane aligned with the aortic annulus both in systole and diastole . Aortic annular dimensions (short, long and mean diameter, area 
and circumference) were independently measured by 3 expert readers from 3 institutions. Changes of aortic annulus geometry between systole and 
diastole were evaluated. Furthermore, interobserver agreement was determined for systolic and diastolic measurements.
Results:  Aortic annuus area was significantly larger in systole compared to diastole (476±91 mm2 vs. 456 ± 96 mm2, p < 0.001). Similarly, 
there were small, but significant differences in circumference (80±9 mm vs. 78±9 mm), short diameter (21±2mm vs,. 20±2 mm; p < 0.001) and 
long diameter (27±3 mm vs. 26±3mm, p = 0.05). The most reproducible measurement were the mean annular diameter (inter-observer intraclass 
correlation coefficient in systole :0.84 [95% confidence interval (CI): 0.78 to 0.90] and diastole 0.853 [0.79 to 0.91]and annular area systole 0.81 
[95% confidence interval: 0.60 to 0.90] and diastole 0.80 [0.60-0.88], with lower reproducibility of the 2-dimensional measurements long diameter 
systole 0.78 [0.68-0.85] diastole 0.79 [0.70-0.86] and short diameter systole 0.70 [0.49-0.82] and diastole 0.67 [0.47-0.80].
Conclusions:  The aortic annulus is marginally smaller in diastole than systole across all MDCT methods of measurement. The interobserver 
reproducibility of these measurements appears unaffected by the phase of the cardiac cycle. Further study is needed to define the implications of 
these differences on sizing.
