First Physics Results at Babar
The BABAR detector, which operates at the SLAC PEP-II asymmetric e{sup +}e{sup -} collider at energies near the {Upsilon}(4S) resonance, started operation on the 26th of May 1999. They present the first study of sin2{beta}, with samples of B{sup 0} {yields} J/{psi} K{sub s}{sup 0} and B{sup 0} {yields} {psi}(2S) K{sub 2}{sup 0} decays, using 9.0 fb{sup -1} of data recorded between January and July 2000 at the {Upsilon}(4S) resonance and 0.8 fb{sup -1} recorded 40 MeV below the {Upsilon}(4S) resonance. A preliminary result of sin2{beta} = 0.12 {+-} 0.37(stat) {+-} 0.09(syst) was obtained. Details of the analysis are given. Moreover, they present measurements of charged and neutral B meson lifetimes and B{sup 0}{bar B}{sup 0} oscillation frequency.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 784826
- Report Number(s):
- SLAC-PUB-8727; TRN: US0108791
- Resource Relation:
- Other Information: PBD: 1 Dec 2000
- Country of Publication:
- United States
- Language:
- English
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