We report e+e-→bb cross section measurements by the BABAR experiment performed during an energy scan in the range of 10.54 to 11.20 GeV at the SLAC PEP-II e+e- collider. A total relative error of about 5% is reached in more than 300 center-of-mass energy steps, separated by about 5 MeV. These measurements can be used to derive precise information on the parameters of the Y(10860) ; Y(11020) resonances. In particular we show that their widths may be smaller than previously measured. © 2009 the American Physical Society.
Measurement of the e+e-→ bb Cross Section between s√ = 10.54 ; 11.20 GeV
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2009-01-01
Abstract
We report e+e-→bb cross section measurements by the BABAR experiment performed during an energy scan in the range of 10.54 to 11.20 GeV at the SLAC PEP-II e+e- collider. A total relative error of about 5% is reached in more than 300 center-of-mass energy steps, separated by about 5 MeV. These measurements can be used to derive precise information on the parameters of the Y(10860) ; Y(11020) resonances. In particular we show that their widths may be smaller than previously measured. © 2009 the American Physical Society.File in questo prodotto:
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