First Physics Results at Babar | Zendy

F. Di Lodovico | Zendy

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First Physics Results at Babar

Author(s) -

F. Di Lodovico

Publication year - 2000

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/784796

Subject(s) - physics , resonance (particle physics) , b meson , nuclear physics , collider , bar (unit) , oscillation (cell signaling) , meson , particle physics , chemistry , biochemistry , meteorology

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.

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