We report observations of CP violation in the decays B-0 -> K+pi(-) and B-0 ->pi(+)pi(-) in a sample of 383 x 10(6) Upsilon(4S)-> B (B) over bar events. We find 4372 +/- 82 B-0 -> K+pi(-) decays and measure the direct CP-violating charge asymmetry A(K pi)=-0.107 +/- 0.018(stat)(-0.004)(+0.007)(syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139 +/- 49 B-0 ->pi(+)pi(-) decays and measure the CP-violating asymmetries S-pi pi=-0.60+/-0.11(stat) +/- 0.03(syst) and C-pi pi=-0.21 +/- 0.09(stat) +/- 0.02(syst). CP conservation in B-0 ->pi(+)pi(-) (S-pi pi=C-pi pi=0) is excluded at a confidence level 1-C.L.=8 x 10(-8), corresponding to 5.4 standard deviations.

Observation of CP violation in B-0 -> K+pi(-) and B-0 ->pi(+)pi(-) / Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J.p., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Tico, J.g., Grauges, E., Lopez, L., Palano, A., Eigen, G., Ofte, I., Stugu, B., Sun, L., Abrams, G.s., Battaglia, M., Brown, D.n., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 99:2(2007). [10.1103/physrevlett.99.021603]

Observation of CP violation in B-0 -> K+pi(-) and B-0 ->pi(+)pi(-)

RAHATLOU, SHAHRAM;BELLINI, Fabio;CAVOTO, Gianluca;DEL RE, Daniele;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;VOENA C;
2007

Abstract

We report observations of CP violation in the decays B-0 -> K+pi(-) and B-0 ->pi(+)pi(-) in a sample of 383 x 10(6) Upsilon(4S)-> B (B) over bar events. We find 4372 +/- 82 B-0 -> K+pi(-) decays and measure the direct CP-violating charge asymmetry A(K pi)=-0.107 +/- 0.018(stat)(-0.004)(+0.007)(syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139 +/- 49 B-0 ->pi(+)pi(-) decays and measure the CP-violating asymmetries S-pi pi=-0.60+/-0.11(stat) +/- 0.03(syst) and C-pi pi=-0.21 +/- 0.09(stat) +/- 0.02(syst). CP conservation in B-0 ->pi(+)pi(-) (S-pi pi=C-pi pi=0) is excluded at a confidence level 1-C.L.=8 x 10(-8), corresponding to 5.4 standard deviations.
2007
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of CP violation in B-0 -> K+pi(-) and B-0 ->pi(+)pi(-) / Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J.p., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Tico, J.g., Grauges, E., Lopez, L., Palano, A., Eigen, G., Ofte, I., Stugu, B., Sun, L., Abrams, G.s., Battaglia, M., Brown, D.n., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 99:2(2007). [10.1103/physrevlett.99.021603]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/231002
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 51
  • ???jsp.display-item.citation.isi??? 61
social impact