TY - JOUR
T1 - Differential branching fraction and angular analysis of the decay B^0 -> K^*0 μ+μ−.
AU - Playfer, Stephen
AU - The LHCb Collaboration
AU - Needham, Matthew
AU - Muheim, Franz
AU - Clarke, Peter
AU - Xie, Yuehong
AU - Eisenhardt, Stephan
PY - 2012/5/3
Y1 - 2012/5/3
N2 - The angular distributions and the partial branching fraction of the decay B0→K∗0μ+μ− are studied using an integrated luminosity of 0.37fb−1 of data collected with the LHCb detector. The forward-backward asymmetry of the muons, AFB, the fraction of longitudinal polarisation, FL, and the partial branching fraction, dB/dq2, are determined as a function of the dimuon invariant mass. The measurements are in good agreement with the Standard Model predictions and are the most precise to date. In the dimuon invariant mass squared range 1.00−6.00GeV2/c4, the results are AFB=−0.06+0.13−0.14±0.04, FL=0.55±0.10±0.03 and dB/dq2=(0.42±0.06±0.03)×10−7c4/GeV2. In each case, the first error is statistical and the second systematic.
AB - The angular distributions and the partial branching fraction of the decay B0→K∗0μ+μ− are studied using an integrated luminosity of 0.37fb−1 of data collected with the LHCb detector. The forward-backward asymmetry of the muons, AFB, the fraction of longitudinal polarisation, FL, and the partial branching fraction, dB/dq2, are determined as a function of the dimuon invariant mass. The measurements are in good agreement with the Standard Model predictions and are the most precise to date. In the dimuon invariant mass squared range 1.00−6.00GeV2/c4, the results are AFB=−0.06+0.13−0.14±0.04, FL=0.55±0.10±0.03 and dB/dq2=(0.42±0.06±0.03)×10−7c4/GeV2. In each case, the first error is statistical and the second systematic.
U2 - 10.1103/PhysRevLett.108.181806
DO - 10.1103/PhysRevLett.108.181806
M3 - Article
SN - 1079-7114
VL - 108
SP - 181806
JO - Physical Review Letters
JF - Physical Review Letters
ER -