1AFFOLDER 2001F uses the reconstructed ${{\mathit B}}~$meson through semileptonic decay channels. The fraction of light ${{\mathit B}}~$mesons that are produced at $\mathit L$=1 ${{\mathit B}^{{**}}}$ states is measured to be $0.28$ $\pm0.06$ $\pm0.03$.
2BARATE 1998L uses fully reconstructed ${{\mathit B}}$ mesons to search for ${{\mathit B}}{}^{**}$ production in the ${{\mathit B}}{{\mathit \pi}^{\pm}}$ system. In the framework of heavy quark symmetry (HQS), they also measured the mass of ${{\mathit B}_{{{2}}}^{*}}$ to be $5739$ ${}^{+8}_{-11}{}^{+6}_{-4}$ MeV/$\mathit c{}^{2}$ and the relative production rate of B( ${{\mathit b}}$ $\rightarrow$ ${{\mathit B}_{{{2}}}^{*}}$ $\rightarrow$ ${{\mathit B}}{}^{(*)}$ ${{\mathit \pi}}$)/B( ${{\mathit b}}$ $\rightarrow$ ${{\mathit B}}$ $_{{{\mathit u}},{{\mathit d}}}$) = ($31$ $\pm9$ ${}^{+6}_{-5})\%$.
4ACCIARRI 1999N uses inclusive reconstructed ${{\mathit B}}$ mesons to search for ${{\mathit B}}{}^{**}$ production in the ${{\mathit B}}{}^{(*)}{{\mathit \pi}^{\pm}}$ system. In the framework of HQET, they measured the mass of ${{\mathit B}^{*}_{\mathrm 1}}$ and ${{\mathit B}^{*}_{\mathrm 2}}$ to be $5670$ $\pm10$ $\pm13~$MeV and $5768$ $\pm5$ $\pm6$ with the B( ${{\mathit b}}$ $\rightarrow$ ${{\mathit B}}{}^{**}$)= ($32$ $\pm3$ $\pm6$) $ \times 10^{-2}$. They also reported the evidence for the existence of an excited ${{\mathit B}}$-meson state or mixture of states in the region $5.9 - 6.0$ GeV.
References:
AFFOLDER
2001F
PR D64 072002
Observation of Orbitally Excited ${{\mathit B}}$ Mesons in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$= 1.8 TeV
ACCIARRI
1999N
PL B465 323
Measurement of the Spectroscopy of Orbitally Excited ${{\mathit B}}$ Mesons at LEP
BARATE
1998L
PL B425 215
Resonant Structure and Flavour Tagging in the ${{\mathit B}}$ ${{\mathit \pi}^{\pm}}$ System using Fully Reconstructed ${{\mathit B}}$ Decays
BUSKULIC
1996D
ZPHY C69 393
Production of Excited Beauty States in ${{\mathit Z}}$ Decays
ABREU
1995B
PL B345 598
Observation of Orbitally Excited ${{\mathit B}}$ Mesons
AKERS
1995E
ZPHY C66 19
Observations of ${{\mathit \pi}}$ $−$ ${{\mathit B}}$ Charge Flavor Correlations and Resonant ${{\mathit B}}$ ${{\mathit \pi}}$ and ${{\mathit B}}$ ${{\mathit K}}$ Production