<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>violation and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:math>invariance in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>±</mml:mo></mml:msup></mml:math>decays with final state interactions

Bediaga, I.; Frederico, T.; Lourenço, O.

doi:10.1103/physrevd.89.094013

Cited by 78 publications

(90 citation statements)

References 27 publications

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“…For these decay modes, both the resonant and nonresonant contributions may appear, as well as the possible significant final-state interactions (FSIs) [13][14][15]. Different frameworks have been developed for the study of the three-body hadronic B meson decays, based on the symmetry principles [16][17][18][19][20][21][22][23][24] or factorization theorems [25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Quasi-two-body decays B(s)→Pρ→Pππ in the perturbative QCD approach

Xiao

et al. 2017

Phys. Rev. D

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In this work, we calculate the CP -averaged branching ratios and the direct CP -violating asymmetries of the quasi-two-body decays B (s) → P (ρ →)ππ by employing the perturbative QCD (PQCD) approach (here P stands for a light pseudoscalar meson π, K, η or η ′ ). The vector current timelike form factor Fπ, which contains the final-state interactions between the pion pair in the resonant region associated with the P -wave states ρ(770) along with the two-pion distribution amplitudes, is employed to describe the interactions between the ρ and the pion pair under the hypothesis of the conserved vector current. We found that (a) the PQCD predictions for the branching ratios and the direct CP -violating asymmetries for most considered B (s) → P (ρ →)ππ decays agree with currently available data within errors, (b) for B(B → π 0 ρ 0 → π 0 (π + π − ), the PQCD prediction is much smaller than the measured one, and (c) for the B + → π + (ρ 0 →)π + π − decay mode, there is a negative CP asymmetry (−27.5 +3.0 −3.7 )%, which agrees with other theoretical predictions but is different in sign from those reported by BABAR and LHCb Collaborations.

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Section: Introductionmentioning

confidence: 99%

Quasi-two-body decays B(s)→Pρ→Pππ in the perturbative QCD approach

Xiao

et al. 2017

Phys. Rev. D

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“…These possible FSI, involving two, three or more hadrons, induced the idea that CPT constraints would not be of practical use in charmless B decays [9]. However, the high sample of experimental data, first with BaBar and Belle and then with LHCb, shows that these multi-mesons rescattering processes are not dominant in charmless multi body B decays [10,11].…”

Section: Introductionmentioning

confidence: 99%

SuppressedB→PVCPasymmetry:CPTconstraint

et al. 2016

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Charge Parity asymmetry in charmless B meson decays is a key issue to be understood. Many theoretical calculations have been performed using short distance factorization approaches which, in general, do not take into account the CPT invariance constraint. For each channel with CP violation there is an equal amount of CP asymmetry in another channel or other channels, with an opposite sign. This happens if these channels are coupled through final state interactions (FSI). In the specific process B → P V , involving one pseudo-scalar and one vector particle in the final state, we argue that the CP asymmetry, inherent from a short distance mechanism, could be suppressed due to the CPT constraint. In this case, we propose a sensitive and practical experimental method to identify even a small CP asymmetry, which provides the values for A CP without the need for an amplitude analysis. This method, if applied directly to data, will enable to extract the CP asymmetry information in a model independent way and check to which extend the suggested suppression due to the CPT constraint is verified. * pmagalhaes@cbpf.br

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“…Also, LHCb reported a nonzero inclusive CP asymmetry of −0.123 ± 0.017 ± 0.012 ± 0.007 (where, the first uncertainty is statistical, the second is the systematic, and the third is due to the CP asymmetry of the B ± → J/ψ K ± reference mode) and a large unquantified local CP asymmetry in the same mass region. These results suggest that final-state interactions can be a contributing factor to CP violation [6,7]. With this study, we attempt to quantify the CP asymmetry and branching fraction as a function of the K + K − invariant mass based on a data sample collected at the ϒ(4S) resonance by the Belle detector comprising of 772 × 10 6 BB, which corresponds to an integrated luminosity of 711 fb −1 , and an additional 89.4 fb −1 of off-resonance sample recorded at a center-of-mass energy around 60 MeV below the ϒ(4S) resonance.…”

Section: Introductionmentioning

confidence: 90%

Recent measurements of branching fractions and $CP$ asymmetries of charmless hadronic $B$ meson decays at Belle

Kaliyar¹

2017

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

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Hadronic B decays without a charm quark constitute a powerful probe to search for physics beyond the standard model as well as to provide constraints on CP violation parameters. We report final measurements from Belle of the branching fractions and CP asymmetries for the decays B 0 → π 0 π 0 and B ± → K + K − π ± . The B 0 → π 0 π 0 measurements enable us to improve constraints on the angle φ 2 of the CKM unitarity triangle. For B ± → K + K − π ± we measure CP asymmetry as a function of the invariant mass of the K + K − system, where we find a strong evidence for large CP violation and a large increase in yield at low mass region. This result challenges conventional theoretical approaches as it requires a large enhancement in both tree and loop level diagrams in the same small region of phase-space.

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CPviolation andCPTinvariance inB±decays with final state interactions

Cited by 78 publications

References 27 publications

Quasi-two-body decays B(s)→Pρ→Pππ in the perturbative QCD approach

Quasi-two-body decays B(s)→Pρ→Pππ in the perturbative QCD approach

SuppressedB→PVCPasymmetry:CPTconstraint

Recent measurements of branching fractions and $CP$ asymmetries of charmless hadronic $B$ meson decays at Belle

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