We establish improved upper limits on branching fractions for B0 decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for final states where the only visible product is a photon. Within the Standard Model, these decays have branching fractions that are below the current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions for these channels. Using 471×106 BB⎯⎯⎯ pairs collected at the Υ(4S) resonance by the BABAR experiment at the PEP-II e+e− storage ring at the SLAC National Accelerator Laboratory, we establish upper limits at the 90% confidence level of 2.4×10−5 for the branching fraction of B0→invisible and 1.7×10−5 for the branching fraction of B0→invisible+γ.

Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2012). Improved limits on B-0 decays to invisible ( plus gamma) final states. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(5), 1-8 [10.1103/PhysRevD.86.051105].

Improved limits on B-0 decays to invisible ( plus gamma) final states

PATRIGNANI, CLAUDIA;
2012

Abstract

We establish improved upper limits on branching fractions for B0 decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for final states where the only visible product is a photon. Within the Standard Model, these decays have branching fractions that are below the current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions for these channels. Using 471×106 BB⎯⎯⎯ pairs collected at the Υ(4S) resonance by the BABAR experiment at the PEP-II e+e− storage ring at the SLAC National Accelerator Laboratory, we establish upper limits at the 90% confidence level of 2.4×10−5 for the branching fraction of B0→invisible and 1.7×10−5 for the branching fraction of B0→invisible+γ.
2012
Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2012). Improved limits on B-0 decays to invisible ( plus gamma) final states. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(5), 1-8 [10.1103/PhysRevD.86.051105].
Lees, J. P.; Poireau, V.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu G.;...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

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/11585/537427
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 28
  • ???jsp.display-item.citation.isi??? 18
social impact