Abstract: An angular analysis of the B 0 → K *0e +e − decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb −1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q 2) interval between 0.002 and 1.120 GeV 2/c 4. The angular observables F L and A T Re which are related to the K *0 polarisation and to the lepton forward-backward asymmetry, are measured to be F L = 0.16 ± 0.06 ± 0.03 and A T Re = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A T (2) and A T Im which are sensitive to the photon polarisation in this q 2 range, are found to be A T (2) = − 0.23 ± 0.23 ± 0.05 and A T Im = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions.[Figure not available: see fulltext.]
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© 2015, The Author(s).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics