Catalogo dei prodotti della ricerca

The photon spectrum in the inclusive electromagnetic radiative decays of the B meson, B --> X-s gamma plus B --> X-d gamma, is studied using a data sample of (382.8 +/- 4.2) x 10(6)Y(4S) --> B (B) over bar decays collected by the BABAR experiment at SLAC. The spectrum is used to extract the branching fraction B(B --> X-s gamma) = (3.21 +/- 0.33) x 10(-4) for E-gamma > 1.8 GeV and the direct CP asymmetry A(CP)(B --> Xs+d gamma) = 0.057 +/- 0.063. The effects of detector resolution and Doppler smearing are unfolded to measure the photon energy spectrum in the B meson rest frame.

Precision Measurement of the B -> Xs gamma Photon Energy Spectrum, Branching Fraction, and Direct CP Asymmetry ACP(B -> Xs+d gamma) / J. p., L., V., P., V., T., J. g., T., E., G., A., P., G., E., B., S., D. n., B., L. t., K., Y. g., K., G., L., H., K., T., S., D. j., A., C., H., T. s., M., J. a., M., R. y., S.o., A., K., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 109:(2012), p. 191801. [10.1103/physrevlett.109.191801]

Precision Measurement of the B -> Xs gamma Photon Energy Spectrum, Branching Fraction, and Direct CP Asymmetry ACP(B -> Xs+d gamma)

FACCINI, Riccardo;FERRONI, Fernando;
2012

Abstract

The photon spectrum in the inclusive electromagnetic radiative decays of the B meson, B --> X-s gamma plus B --> X-d gamma, is studied using a data sample of (382.8 +/- 4.2) x 10(6)Y(4S) --> B (B) over bar decays collected by the BABAR experiment at SLAC. The spectrum is used to extract the branching fraction B(B --> X-s gamma) = (3.21 +/- 0.33) x 10(-4) for E-gamma > 1.8 GeV and the direct CP asymmetry A(CP)(B --> Xs+d gamma) = 0.057 +/- 0.063. The effects of detector resolution and Doppler smearing are unfolded to measure the photon energy spectrum in the B meson rest frame.
2012
01 Pubblicazione su rivista::01a Articolo in rivista
Precision Measurement of the B -> Xs gamma Photon Energy Spectrum, Branching Fraction, and Direct CP Asymmetry ACP(B -> Xs+d gamma) / J. p., L., V., P., V., T., J. g., T., E., G., A., P., G., E., B., S., D. n., B., L. t., K., Y. g., K., G., L., H., K., T., S., D. j., A., C., H., T. s., M., J. a., M., R. y., S.o., A., K., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 109:(2012), p. 191801. [10.1103/physrevlett.109.191801]
01a Articolo in rivista
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/11573/519152
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 99
  • ???jsp.display-item.citation.isi??? 63
social impact