We present a measurement of the B-0 -> (Lambda) over barp pi(-) branching fraction performed using the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. Based on a sample of 467 x 10(6) B (B) over bar pairs we measure B(B-0 -> (Lambda) over barp pi(-)) = [3.07 +/- 0.31(stat) +/- 0.23(syst)] x 10(-6). The measured differential spectrum as a function of the dibaryon invariant mass m((Lambda) over barp) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the (Lambda) over bar polarization as a function of (Lambda) over bar energy in the B-0 rest frame (E-(Lambda) over bar*) and compare it with theoretical expectations of fully longitudinally right-polarized (Lambda) over bar at large E-(Lambda) over bar*.

Measurement of the branching fraction and (Lambda)over-bar polarization in B-0 ->(Lambda)over bar p pi(-) / B., A., Y., K., J. P., L., V., P., E., P., X., P., V., T., J. G., T., E., G., M., M., A., P., M., P., G., E., B., S., L., S., M., B., D. N., B., L. T., K., Y. G., K., G., L., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:(2009), pp. 112009-112009. [10.1103/physrevd.79.112009]

Measurement of the branching fraction and (Lambda)over-bar polarization in B-0 ->(Lambda)over bar p pi(-)

CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;C. Voena;
2009

Abstract

We present a measurement of the B-0 -> (Lambda) over barp pi(-) branching fraction performed using the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. Based on a sample of 467 x 10(6) B (B) over bar pairs we measure B(B-0 -> (Lambda) over barp pi(-)) = [3.07 +/- 0.31(stat) +/- 0.23(syst)] x 10(-6). The measured differential spectrum as a function of the dibaryon invariant mass m((Lambda) over barp) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the (Lambda) over bar polarization as a function of (Lambda) over bar energy in the B-0 rest frame (E-(Lambda) over bar*) and compare it with theoretical expectations of fully longitudinally right-polarized (Lambda) over bar at large E-(Lambda) over bar*.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the branching fraction and (Lambda)over-bar polarization in B-0 ->(Lambda)over bar p pi(-) / B., A., Y., K., J. P., L., V., P., E., P., X., P., V., T., J. G., T., E., G., M., M., A., P., M., P., G., E., B., S., L., S., M., B., D. N., B., L. T., K., Y. G., K., G., L., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:(2009), pp. 112009-112009. [10.1103/physrevd.79.112009]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/227283
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