Measurement of the branching fraction and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>Λ</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>polarization in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:mover accent="true"><mml:mi>Λ</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>p</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup>

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M.; Roney, J. M.; Sobie, R.; Gershon, T.; Harrison, P. F.; Ilić, J.; Latham, T.; Mohanty, G. B.; Puccio, E. M. T.; Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C.; Wu, S. L.

doi:10.1103/physrevd.79.112009

Cited by 18 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…B " B 0 M decays, where M can be either pesudoscalar (P) or vector (V) mesons [1][2][3][4][5][6][7][8]. In particular, the threshold effect of the sharp peak around the threshold area in the dibaryon invariant mass spectrum has been observed as a common feature in these baryonic decays [1][2][3][4][5][6][7][8], which makes the decay branching ratios reach to the magnitude of order 10 À6 , accessible to the detection at the B factories. Furthermore, it partly gives the answer of the nonobservations of the two-body baryonic " B decays [9], such as " B 0 !…”

Section: Introductionmentioning

confidence: 99%

Study ofB¯→Λp¯ρ(ϕ)andB¯<

Geng

Hsiao

2012

Phys. Rev. D

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We examine the three-body baryonic " B ! B " B 0 V decays with V vector mesons in the standard model. We can simultaneously explain the recent experimental data on the decays of B À ! Ã " p 0 and " B ! Ã "Ã " K Ã based on the QCD counting rules and SUð3Þ flavor symmetry. We also predict that the decay branching ratios of " B 0 ! Ã " p þ and B À ! Ã " p are 3.0 and 1:5 Â 10 À6 , respectively, which are promising to be observed by BELLE and BABAR at the B factories.

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Section: Introductionmentioning

confidence: 99%

Study ofB¯→Λp¯ρ(ϕ)andB¯<

Geng

Hsiao

2012

Phys. Rev. D

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show abstract

“…First the phase space events are generated, then an acceptance-rejection method is adopted to get the signal toy MC samples based on the distribution in Eq. (11).…”

Section: Monte Carlo Simulation and Resultsmentioning

confidence: 99%

“…Therefore, the hyperon will undergo a Larmor precession in the magnetic field in the detector. However, this effect was not considered in previous publications [4,[6][7][8][9][10][11], which may account for the difference of the measurement of α − . This effect is small but very important, because the measurements of CP violation could reach high sensitivity.…”

Section: Introductionmentioning

confidence: 96%

Polarization difference between hyperons and antihyperons induced by an external magnetic field

2019

Phys. Rev. D

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We investigate the quantum correlated ΛΛ production in the reaction e þ e − → J=ψ → ΛΛ. Since the Λ orΛ has a nonzero magnetic moment, its spin will undergo a Larmor precession in the magnetic field of the detector, such as the BESIII experiment. Because of the spin precession, the angular distribution of the Λ andΛ is slightly modified. Therefore, we obtain the corresponding term of the modified angular distribution due to the effect of the Larmor precession. We also estimate its potential effect on the measurements of CP violation, as well as the decay asymmetry parameter and polarization of Λ. The polarization of the Λ orΛ at the production vertex will rotate around the B-field axis, over an angle depending on the flight length, but it still could be measured by fit to the corrected angular distribution. Of important note, we conclude that a nonzero CP asymmetry of order 10 −4 will be caused once neglecting spin precession of the Λ andΛ in the e þ e − → J=ψ → ΛΛ process. The size of this CP asymmetry is several times that of predicted within Standard Model in the hyperon decay. Although this effect is small, it will play an important role in future high precision experiments, such as the super-taucharm factory.

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“…In the analysis selection chain, the candidates for both the B 0 (s) → pp signal decays and for the normalisation channel The first observation of the decay B 0 → pp, the rarest B 0 decay ever observed, provides valu- The branching fraction of the B 0 s → pΛ K − decay has been predicted to be of the order of 10 −6 [18], the same as for its similar mode B 0 → pΛ π − . The current experimental situation on the family of B 0 (s) → pΛ h − decays (h = π, K) and related modes such as B 0 (s) → pΣ 0 h − , with Σ 0 → Λ γ, is rather poor: the B 0 → pΛ π − decay has been studied by the BaBar [19] and Belle [20] collaborations; the Belle collaboration also reported the 90% C.L. upper limits…”

Section: First Observation Of the Rare B 0 → Pp Decaymentioning

confidence: 99%

Charmless $B$ decays at LHCb

Rodrigues¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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A review of the latest analyses from the LHCb experiment on charmless B-meson decays is presented. Emphasis is given on the first observation of the rare two-body baryonic decay B 0 → pp and the observation of several multi-body baryonic decays of the B 0 and B 0 s mesons. The decay mode B 0 → pp is the rarest decay of the B 0 meson observed to date. Its branching fraction is determined to be B(B 0 → pp) = (1.25 ± 0.27 ± 0.18) × 10 −8 , where the first uncertainty is statistical and the second systematic.

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Measurement of the branching fraction andΛ¯polarization inB0→Λ¯pπ−

Cited by 18 publications

References 18 publications

Study ofB¯→Λp¯ρ(ϕ)andB¯<

Study ofB¯→Λp¯ρ(ϕ)andB¯<

Polarization difference between hyperons and antihyperons induced by an external magnetic field

Charmless $B$ decays at LHCb

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