We present evidence for D0-D̅ 0 mixing in D0→K+π- decays from 384 fb-1 of e+e- colliding-beam data recorded near √s=10.6 GeV with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. We find the mixing parameters x′2=[-0.22±0.30(stat)±0.21(syst)]×10-3 and y′=[9.7±4.4(stat)±3.1(syst)]×10-3 and a correlation between them of -0.95. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure RD, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303±0.016(stat)±0.010(syst)]%. We find no evidence for CP violation.
Evidence for D0 - anti-D0 mixing / DE NARDO, Guglielmo; Fabozzi, F.; Lista, L.; Monorchio, D.; Sciacca, Crisostomo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 98:(2007), pp. 211802-1-211802-7. [10.1103/PhysRevLett.98.211802]
Evidence for D0 - anti-D0 mixing
DE NARDO, GUGLIELMO;L. Lista;SCIACCA, CRISOSTOMO
2007
Abstract
We present evidence for D0-D̅ 0 mixing in D0→K+π- decays from 384 fb-1 of e+e- colliding-beam data recorded near √s=10.6 GeV with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. We find the mixing parameters x′2=[-0.22±0.30(stat)±0.21(syst)]×10-3 and y′=[9.7±4.4(stat)±3.1(syst)]×10-3 and a correlation between them of -0.95. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure RD, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303±0.016(stat)±0.010(syst)]%. We find no evidence for CP violation.| File | Dimensione | Formato | |
|---|---|---|---|
|
Evidence for D0.pdf
non disponibili
Tipologia:
Documento in Post-print
Licenza:
Accesso privato/ristretto
Dimensione
260.13 kB
Formato
Adobe PDF
|
260.13 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
