期刊
PHYSICAL REVIEW D
卷 79, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.031102
关键词
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资金
- DOE and NSF (USA)
- NSERC (Canada)
- CEA and CNRS-IN2P3 (France)
- BMBF and DFG (Germany)
- INFN (Italy)
- FOM (The Netherlands)
- NFR (Norway)
- MES (Russia)
- MEC (Spain)
- STFC (United Kingdom)
- Marie Curie EIF (European Union)
- A. P. Sloan Foundation
- Science and Technology Facilities Council [ST/H001166/1, ST/H000887/1, ST/F008015/1, PP/E000444/1, ST/H000992/1] Funding Source: researchfish
- STFC [ST/F008015/1, ST/H000992/1, ST/H001166/1, ST/H000887/1] Funding Source: UKRI
We use a sample of 384 X 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II e(+)e(-) collider to study angular distributions in the rare decays B -> K(*)l(+)l(-), where l(+)l(-) is either e(+)e(-) or mu(+)mu(-). For low dilepton invariant masses, m(ee) < 2.5 GeV/c(2), we measure a lepton forward-backward asymmetry A(FB) = 0.24(-0.23)(+0.18) +/- 0.05 and K* longitudinal polarization F-L = 0.35 +/- 0.16 +/- 0.04. For m(ee) > 3.2 GeV/c(2), we measure A(FB) = 0.76(-0.32)(+0.52) +/- 0.07 F-L = 0.71(-0.22)(+0.20) +/- 0.04.
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