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EnglishWe present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K(S)(0)pi(0)pi(0), with K(S)(0)->pi(+)pi(-). We use a sample of approximately 227 million B-meson pairs recorded at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit, we extract the mixing-induced CP-violation parameter S=0.72 +/- 0.71 +/- 0.08 and the direct CP-violation parameter C=0.23 +/- 0.52 +/- 0.13, where the first uncertainty is statistical and the second systematic.
http://hdl.handle.net/11384/6408| Titolo: | Measurement of CP asymmetry in B(0) -> K(s)(0)pi(0)pi(0) decays RID A-8798-2012 RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 |
| Autori interni: | LUSIANI, Alberto |
| Data di pubblicazione: | 2007 |
| Rivista: | PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY |
| Abstract: | We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K(S)(0)pi(0)pi(0), with K(S)(0)->pi(+)pi(-). We use a sample of approximately 227 million B-meson pairs recorded at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit, we extract the mixing-induced CP-violation parameter S=0.72 +/- 0.71 +/- 0.08 and the direct CP-violation parameter C=0.23 +/- 0.52 +/- 0.13, where the first uncertainty is statistical and the second systematic. |
| Handle: | http://hdl.handle.net/11384/6408 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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