A binned Dalitz plot analysis of B+- -> D K+- decays, with D ->K0s pi+ pi- and D -> K0s K+ K-, is performed to measure the CP-violating observables x+- and y+- which are sensitive to the CKM angle gamma. The analysis exploits 1.0 fb-1 of data collected by the LHCb experiment. The study makes no model-based assumption on the variation of the strong phase of the D decay amplitude over the Dalitz plot, but uses measurements of this quantity from CLEO-c as input. The values of the parameters are found to be x-=(0.0+-4.3+-1.5+-0.6)x10-2, y-=(2.7+-5.2+-0.8+-2.3)x10-2, x+=(-10.3+-4.5+-1.8+-1.4)x10-2 and y+=(-0.9+-3.7+-0.8+-3.0)x10-2. The first, second, and third uncertainties are the statistical, the experimental systematic, and the error associated with the precision of the strong-phase parameters measured at CLEO-c, respectively. These results correspond to gamma=(44+43-38)^0, with a second solution at gamma->gamma+180^0, and rB=0.07+-0.04, where rB is the ratio between the suppressed and favoured B decay amplitudes.

A model-independent Dalitz plot analysis of B±→DK± with D→KS0h+h- (h=π, K) decays and constraints on the CKM angle γ / R., A., C., A.B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P., A.C., A. A., A., S., A., Y., A., L., A., J., A., R. B., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 718:1(2012), pp. 43-55. [10.1016/j.physletb.2012.10.020]

A model-independent Dalitz plot analysis of B±→DK± with D→KS0h+h- (h=π, K) decays and constraints on the CKM angle γ

BIZZETI, Andrea;
2012

Abstract

A binned Dalitz plot analysis of B+- -> D K+- decays, with D ->K0s pi+ pi- and D -> K0s K+ K-, is performed to measure the CP-violating observables x+- and y+- which are sensitive to the CKM angle gamma. The analysis exploits 1.0 fb-1 of data collected by the LHCb experiment. The study makes no model-based assumption on the variation of the strong phase of the D decay amplitude over the Dalitz plot, but uses measurements of this quantity from CLEO-c as input. The values of the parameters are found to be x-=(0.0+-4.3+-1.5+-0.6)x10-2, y-=(2.7+-5.2+-0.8+-2.3)x10-2, x+=(-10.3+-4.5+-1.8+-1.4)x10-2 and y+=(-0.9+-3.7+-0.8+-3.0)x10-2. The first, second, and third uncertainties are the statistical, the experimental systematic, and the error associated with the precision of the strong-phase parameters measured at CLEO-c, respectively. These results correspond to gamma=(44+43-38)^0, with a second solution at gamma->gamma+180^0, and rB=0.07+-0.04, where rB is the ratio between the suppressed and favoured B decay amplitudes.
2012
718
1
43
55
A model-independent Dalitz plot analysis of B±→DK± with D→KS0h+h- (h=π, K) decays and constraints on the CKM angle γ / R., A., C., A.B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P., A.C., A. A., A., S., A., Y., A., L., A., J., A., R. B., A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 718:1(2012), pp. 43-55. [10.1016/j.physletb.2012.10.020]
R., Aaij; C., Abellan Beteta; A., Adametz; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/854107
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