[HTML][HTML] Branching fraction and CP asymmetry of the decays B+→ KS0π+ and B+→ KS0K+
R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder… - Physics Letters B, 2013 - Elsevier
R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio…
Physics Letters B, 2013•ElsevierAn analysis of B+→ KS 0 π+ and B+→ KS 0 K+ decays is performed with the LHCb
experiment. The pp collision data used correspond to integrated luminosities of 1 fb− 1 and
2 fb− 1 collected at centre-of-mass energies of s= 7 TeV and s= 8 TeV, respectively. The
ratio of branching fractions and the direct CP asymmetries are measured to be B (B+→ KS 0
K+)/B (B+→ KS 0 π+)= 0.064±0.009 (stat.)±0.004 (syst.), A CP (B+→ KS 0 π+)=−
0.022±0.025 (stat.)±0.010 (syst.) and A CP (B+→ KS 0 K+)=− 0.21±0.14 (stat.)±0.01 (syst.) …
experiment. The pp collision data used correspond to integrated luminosities of 1 fb− 1 and
2 fb− 1 collected at centre-of-mass energies of s= 7 TeV and s= 8 TeV, respectively. The
ratio of branching fractions and the direct CP asymmetries are measured to be B (B+→ KS 0
K+)/B (B+→ KS 0 π+)= 0.064±0.009 (stat.)±0.004 (syst.), A CP (B+→ KS 0 π+)=−
0.022±0.025 (stat.)±0.010 (syst.) and A CP (B+→ KS 0 K+)=− 0.21±0.14 (stat.)±0.01 (syst.) …
An analysis of B+→ K S 0 π+ and B+→ K S 0 K+ decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1 fb− 1 and 2 fb− 1 collected at centre-of-mass energies of s= 7 TeV and s= 8 TeV, respectively. The ratio of branching fractions and the direct CP asymmetries are measured to be B (B+→ K S 0 K+)/B (B+→ K S 0 π+)= 0.064±0.009 (stat.)±0.004 (syst.), A CP (B+→ K S 0 π+)=− 0.022±0.025 (stat.)±0.010 (syst.) and A CP (B+→ K S 0 K+)=− 0.21±0.14 (stat.)±0.01 (syst.). The data sample taken at s= 7 TeV is used to search for B c+→ K S 0 K+ decays and results in the upper limit (f c⋅ B (B c+→ K S 0 K+))/(f u⋅ B (B+→ K S 0 π+))< 5.8× 10− 2 at 90% confidence level, where f c and f u denote the hadronisation fractions of a b¯ quark into a B c+ or a B+ meson, respectively.
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