A full angular analysis and search for CP violation in the angular distribution with the decays was performed. A broad invariant mass distribution accounted for all potential S-wave contributions leaking into the mass selection window. For B decays to light charmless particles, the hierarchy of decay amplitudes was expected. It was found that systematic errors in efficiencies were dominated by those in track finding and particle identification.

With a sample of about 227x10(6) B (B) over bar pairs recorded with the BABAR detector we perform a full angular analysis of the decay B-0-->phiK(*0)(892). We make novel measurements of five parameters sensitive to CP violation. We also measure the branching fraction to be (9.2+/-0.9+/-0.5)x10(-6) and determine the fractions of longitudinal and parity-odd transverse contributions as f(L)=0.52+/-0.05+/-0.02 and f(perpendicular to)=0.22+/-0.05+/-0.02. The phases of the parity-even and parity-odd transverse amplitudes relative to the longitudinal amplitude are found to be phi(parallel to)=2.34(-0.20)(+0.23)+/-0.05 rad and phi(perpendicular to)=2.47+/-0.25+/-0.05 rad. We also observe the decay B-0-->phiK(*0)(1430).

Measurement of the B-0 -> phi K-*0 decay amplitudes

LUSIANI, Alberto;
2004

Abstract

With a sample of about 227x10(6) B (B) over bar pairs recorded with the BABAR detector we perform a full angular analysis of the decay B-0-->phiK(*0)(892). We make novel measurements of five parameters sensitive to CP violation. We also measure the branching fraction to be (9.2+/-0.9+/-0.5)x10(-6) and determine the fractions of longitudinal and parity-odd transverse contributions as f(L)=0.52+/-0.05+/-0.02 and f(perpendicular to)=0.22+/-0.05+/-0.02. The phases of the parity-even and parity-odd transverse amplitudes relative to the longitudinal amplitude are found to be phi(parallel to)=2.34(-0.20)(+0.23)+/-0.05 rad and phi(perpendicular to)=2.47+/-0.25+/-0.05 rad. We also observe the decay B-0-->phiK(*0)(1430).
2004
Settore FIS/01 - Fisica Sperimentale
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.93.231804.pdf

accesso aperto

Descrizione: articolo principale
Tipologia: Published version
Licenza: Sola lettura
Dimensione 240.29 kB
Formato Adobe PDF
240.29 kB Adobe PDF Visualizza/Apri
11384_4275.pdf

accesso aperto

Tipologia: Submitted version (pre-print)
Licenza: Sola lettura
Dimensione 270.51 kB
Formato Adobe PDF
270.51 kB Adobe PDF Visualizza/Apri

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/11384/4275
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 86
  • ???jsp.display-item.citation.isi??? 105
social impact