Dynamics and direct CP violation in three-body charmless decays of charged B mesons to a proton, an antiproton and a light meson (pion or kaon) are studied using data, corresponding to an integrated luminosity of 1:0 fb(-1), llected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. Production spectra are determined as a function of Dalitz-plot and helicity variables. The forwardbackward asymmetry of the light meson in the p (p) over bar rest frame is measured. No significant CP asymmetry in B+ -> p (p) over barK(+) decay is found in any region of the Dalitz plane. We present the first observation of the decay B+ -> (Lambda) over bar (1520)(-> K+(p) over bar )p near the K+(p) over bar threshold and measure B(B+ -> (Lambda) over bar (1520)p) = (3.9(-0.9)(+1.0)(stat) +/- 0.1 (syst) +/- 0.3 (BF)) x 10(-7), where BF denotes the uncertainty on secondary branching fractions.

Studies of the decays B+ -> p(p)over-barph(+) and observation of B+ -> (Lambda)over-bar(1520)p / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., S., A., S., A., Y., A., L., A., J., A., R., A., J. E., A., R. B., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 88:(2013). [10.1103/physrevd.88.052015]

Studies of the decays B+ -> p(p)over-barph(+) and observation of B+ -> (Lambda)over-bar(1520)p

SARTI, ALESSIO;SCIUBBA, Adalberto;
2013

Abstract

Dynamics and direct CP violation in three-body charmless decays of charged B mesons to a proton, an antiproton and a light meson (pion or kaon) are studied using data, corresponding to an integrated luminosity of 1:0 fb(-1), llected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. Production spectra are determined as a function of Dalitz-plot and helicity variables. The forwardbackward asymmetry of the light meson in the p (p) over bar rest frame is measured. No significant CP asymmetry in B+ -> p (p) over barK(+) decay is found in any region of the Dalitz plane. We present the first observation of the decay B+ -> (Lambda) over bar (1520)(-> K+(p) over bar )p near the K+(p) over bar threshold and measure B(B+ -> (Lambda) over bar (1520)p) = (3.9(-0.9)(+1.0)(stat) +/- 0.1 (syst) +/- 0.3 (BF)) x 10(-7), where BF denotes the uncertainty on secondary branching fractions.
2013
01 Pubblicazione su rivista::01a Articolo in rivista
Studies of the decays B+ -> p(p)over-barph(+) and observation of B+ -> (Lambda)over-bar(1520)p / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., S., A., S., A., Y., A., L., A., J., A., R., A., J. E., A., R. B., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 88:(2013). [10.1103/physrevd.88.052015]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/560400
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