Search NASA⌕ Search

Engineering topics

Baldini-Ferroli, R.

Publications and source records attributed to Baldini-Ferroli, R..

At least 19 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2013

Search for C P Violation in B 0 - B ¯ 0 Mixing Using Partial Reconstruction of B 0 → D * - X ℓ + ν ℓ and a Kaon Tag

We present results of a search for CP violation in B 0 -B¯ 0 mixing with the BABAR detector. We select a sample of B 0 →D* - Xℓ+ν decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetry ACP≡[N(B 0 B 0 )-N(B¯ 0 B¯ 0 )]/[N(B 0 B 0 )+N(B¯ 0 B¯ 0 )]=(0.06±0.17+0.38-0.32)%, corresponding to ΔCP=1-|q/p|=(0.29±0.84 +1.88 -1.61 )×10 -3 .

43 PARTICLE ACCELERATORS↗
DOE OSTI2013

Search for a light Higgs boson decaying to two gluons or ss̄ in the radiative decays of Υ(1S)

We search for the decay Υ(1S)→γA⁰, A⁰→gg or ss̄, where A⁰ is the pseudoscalar light Higgs boson predicted by the next-to-minimal supersymmetric Standard Model. We use a sample of (17.6±0.3)×10⁶ Υ(1S) mesons produced in the BABAR experiment via e⁺e⁻→Υ(2S)→π⁺π⁻Υ(1S). We see no significant signal and set 90%-confidence-level upper limits on the product branching fraction B(Υ(1S)→γA⁰)·B(A⁰→gg or ss̄) ranging from 10⁻⁶ to 10⁻² for A⁰ masses in the range 0.5–9.0 GeV/c².

Lees, J. P.↗