Tisserand, V. (2012) Recent results from BABAR. Il nuovo cimento C, 35 (1). pp. 209-216. ISSN 1826-9885
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Abstract
We present recent results on bottomonium spectroscopy, rare neutral D mesons decays, and semi-leptonic Bs mesons decays. They are based on datasets collected at the Υ(2S), Υ(3S), and Υ(4S) resonances and slightly below and above (up to twice the Λb mass) by the BABAR detector at the PEP-II storage rings at SLAC from year 2000 to 2008. All the results presented here are preliminary. A search of ηb(1S) and ηb(2S) quarkonia is performed in radiative transitions using an experimental technique employing converted γ rays in the Υ(2S) and Υ(3S) decays. The hb(1P) state is searched in the Υ(3S) → hb(1P)π0/π+π− decays, and an evidence of signal is seen in the channel with a neutral pion. A search of the rare FCNC D0 → γγ decay is presented and the channel D0 → π0π0 is accurately measured. Finally, we present a study of the semi-leptonic branching ratio of the Bs mesons and of the fs fraction, the production of Bs mesons. It is based on the very last BABAR dataset collected in 2008 and corresponding to an energy scan above the Υ(4S) resonances performed at PEP-II.
| Item Type: | Article |
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| Uncontrolled Keywords: | Heavy quarkonia ; Charmed mesons ; Decays of bottom mesons |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 14 Apr 2020 16:56 |
| Last Modified: | 14 Apr 2020 16:56 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/17676 |
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