The ratio of branching fractions of the radiative B decays B0->K*0 gamma and B0s->phi gamma has been measured using an integrated luminosity of 1.0 fb-1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of sqrt(s)=7 TeV. The value obtained is B(B0->K*0 gamma)/B(0s->phi gamma) = 1.23+-0.06(stat.)+-0.04(syst.)+-0.10(fs/fd), where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0->K*0 gamma), the branchingfraction B(B0s->phi gamma) is measured to be (3.5+-0.4)x10^-5. The direct CP asymmetry in B0->K*0 gamma decays has also been measured with the same data and found to be A_CP(B0->K*0 gamma)=(9.8+-1.7(stat.)+-0.9(syst.))%. Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations.

Measurement of the ratio of branching fractions B(B0→K*0γ)/B(Bs0→φγ) and the direct CP asymmetry in B 0→K *0γ / 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: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - ELETTRONICO. - 867:1(2013), pp. 1-18. [10.1016/j.nuclphysb.2012.09.013]

Measurement of the ratio of branching fractions B(B0→K*0γ)/B(Bs0→φγ) and the direct CP asymmetry in B 0→K *0γ

BIZZETI, Andrea;
2013

Abstract

The ratio of branching fractions of the radiative B decays B0->K*0 gamma and B0s->phi gamma has been measured using an integrated luminosity of 1.0 fb-1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of sqrt(s)=7 TeV. The value obtained is B(B0->K*0 gamma)/B(0s->phi gamma) = 1.23+-0.06(stat.)+-0.04(syst.)+-0.10(fs/fd), where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0->K*0 gamma), the branchingfraction B(B0s->phi gamma) is measured to be (3.5+-0.4)x10^-5. The direct CP asymmetry in B0->K*0 gamma decays has also been measured with the same data and found to be A_CP(B0->K*0 gamma)=(9.8+-1.7(stat.)+-0.9(syst.))%. Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations.
2013
24-set-2012
867
1
1
18
Measurement of the ratio of branching fractions B(B0→K*0γ)/B(Bs0→φγ) and the direct CP asymmetry in B 0→K *0γ / 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: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - ELETTRONICO. - 867:1(2013), pp. 1-18. [10.1016/j.nuclphysb.2012.09.013]
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/11380/812732
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