We present a measurement of angular observables and a test of lepton flavor universality in the B -> K+l+l- decay, where l is either e or mu. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb(-1) containing 772 x 10^6 BB-bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6 sigma.

Lepton-Flavor-Dependent Angular Analysis of B→K*ℓ+ℓ−

Tenchini, F.;
2017-01-01

Abstract

We present a measurement of angular observables and a test of lepton flavor universality in the B -> K+l+l- decay, where l is either e or mu. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb(-1) containing 772 x 10^6 BB-bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6 sigma.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/581905
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