
Record 
Links 

Author 
BABAR and Belle Collaborations (Adachi, I.. et al); MartinezVidal, F.; Oyanguren, A. 


Title 
Measurement of cos 2 beta in B0 > D((*))h(0) with D > KS(0)pi(+) pi() decays by a combined timedependent Dalitz plot analysis of BABAR and Belle data 
Type 
Journal Article 

Year 
2018 
Publication 
Physical Review D 
Abbreviated Journal 
Phys. Rev. D 


Volume 
98 
Issue 
11 
Pages 
112012  29pp 


Keywords 



Abstract 
We report measurements of sin 2 beta and cos 2 beta using a timedependent Dalitz plot analysis of B0 > D((*))h(0) with D > KS(0)pi(+)pi() decays, where the light unflavored and neutral hadron h(0) is a pi(0),eta, or omega meson. The analysis uses a combination of the final data sets of the BABAR and Belle experiments containing 471 x 10(6) and 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance at the asymmetricenergy B factories PEPII at SLAC and KEKB at KEK, respectively. We measure sin 2 beta = 0.80 +/ 0.14(stat) +/ 0.06(syst) +/ 0.03(model) and cos 2 beta = 0.91 +/ 0.22(stat) +/ 0.09(syst) +/ 0.07(model). The result for the direct measurement of the angle is beta = (22.5 +/ 4.4(stat) +/ 1.2(syst) +/ 0.6(model))degrees. The last quoted uncertainties are due to the composition of the D0 > KS(0)pi(+)pi() decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a highstatistics e(+) e() > c (c) over bar data sample as part of this analysis. We find the first evidence for cos 2 beta > 0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution pi/2 – beta = (68.1 +/ 0.7)degrees at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of beta = 0 degrees is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0 > D(*) h(0) decays. The measurement assumes no direct CP violation in B0 > D(*) h(0) decays. 


Address 
[Lees, J. P.] Univ Savoie, CNRS IN2P3, LAPP, F74941 Annecy Le Vieux, France 


Corporate Author 

Thesis 



Publisher 
Amer Physical Soc 
Place of Publication 

Editor 



Language 
English 
Summary Language 

Original Title 



Series Editor 

Series Title 

Abbreviated Series Title 



Series Volume 

Series Issue 

Edition 



ISSN 
24700010 
ISBN 

Medium 



Area 

Expedition 

Conference 



Notes 
WOS:000454427600001 
Approved 
no 


Is ISI 
yes 
International Collaboration 
yes 


Call Number 
IFIC @ pastor @ 
Serial 
3855 

Permanent link to this record 