PT Journal
AU BABAR Collaboration (Lees, JPea
   Lopez-March, N
   Martinez-Vidal, F
   Oyanguren, A
TI Study of dipion bottomonium transitions and search for the h(b)(1P) state
SO Physical Review D
JI Phys. Rev. D
PY 2011
BP 011104
EP 9pp
VL 84
IS 1
DI 10.1103/PhysRevD.84.011104
LA English
AB We study inclusive dipion decays using a sample of 108 x 10(6)Y(3S) events recorded with the BABAR detector. We search for the decay mode Y(3S) -> pi(+)pi(-) h(b)(1P) and find no evidence for the bottomonium spin-singlet state h(b)(1P) in the invariant mass distribution recoiling against the pi(+)pi(-) system. Assuming the h(b)(1P) mass to be 9.900 GeV/c(2), we measure the upper limit on the branching fraction B[Y(3S) -> pi(+)pi(-) h(b)(1P)] < 1.2 x 10(-4), at 90% confidence level. We also investigate the chi(bJ)(2P) -> pi(+)pi(-) chi(bJ)(1P), Y(3S) -> pi(+)pi(-) Y(2S), and Y(2S) -> pi(+)pi(-) Y(1) dipion transitions and present an improved measurement of the branching fraction of the Y(3S) -> pi(+)pi(-) Y(2S) decay and of the Y(3S) – Y(2S) mass difference.
ER