Heavy quark and chiral symmetry predictions for semileptonic decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mo>→</mml:mo><mml:mi>D</mml:mi><mml:mo>(</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mo>)</mml:mo><mml:mi>π</mml:mi><mml:mi>ℓ</mml:mi

Cheng, Hai Yang; Cheung, Chi-Yee; Dimm, W.; Lin, Guey-Lin; Lin, Y. C.; Yan, Tung-Mow; Yu, Hoi-Lai

doi:10.1103/physrevd.48.3204

Cited by 24 publications

(9 citation statements)

References 27 publications

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“…One potential issue is the separation between D * + and D 0 π + non-resonant states [12] near the D * + mass. In this paper, we consider the experimental measurements of D * to include the full resonant contribution so that isospin can be applied.…”

Section: Extrapolation For Dπ and D2πmentioning

confidence: 99%

An experimentalist’s guide to the semileptonic bottom to charm branching fractions

Rudolph

2018

Int. J. Mod. Phys. A

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This work summarizes the current status of the measured semileptonic branching fractions B 0,+ → X c µν. The sum of exclusive measurements is compared with the inclusive determination, accounting for isospin extrapolation. Further derived quantities are computed, taking into account different explanations for the unmeasured components of the total branching fraction. These quantities focus on the charge breakdown of the final states, and are designed for use as inputs or comparisons in future experimental measurements.Licensed under CC-BY-NC-SA-4.0.

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Section: Extrapolation For Dπ and D2πmentioning

confidence: 99%

An experimentalist’s guide to the semileptonic bottom to charm branching fractions

Rudolph

2018

Int. J. Mod. Phys. A

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“…In the decay B → Dπlν l , the soft pion domain is a large fraction due to the inclusion of the cascade decay B → D * lν l → Dπlν l . This process has been treated by various authors [96,97,98], and the analysis has been extended to B → D * πlν l in [99,97,100]: in [100], in addition to the ground state mesons D, D * , B and B * , also the contribution of the low-lying positive parity 0 + and 1 + resonances and some radially excited states is estimated.…”

Section: Chiral Correctionsmentioning

confidence: 99%

Phenomenology of heavy meson chiral lagrangians

Casalbuoni

Deandrea²,

Bartolomeo³

et al. 1997

Physics Reports

838

972

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The approximate symmetries of Quantum ChromoDynamics in the infinite heavy quark (Q = c, b) mass limit (mQ → ∞) and in the chiral limit for the light quarks (mq → 0, q = u, d, s) can be used together to build up an effective chiral lagrangian for heavy and light mesons describing strong interactions among effective meson fields as well as their couplings to electromagnetic and weak currents, including the relevant symmetry breaking terms. The effective theory includes heavy (Qq) mesons of both negative and positive parity, light pseudoscalars, as well as light vector mesons. We summarize the estimates for the parameters entering the effective lagrangian and discuss in particular some phenomenologically important couplings, such as gB * Bπ. The hyperfine splitting of heavy mesons is discussed in detail. The effective lagrangian allows for the possibility to describe consistently weak couplings of heavy (B, D) to light (π, ρ, K * , etc.) mesons. The method has however its own limitations, due to the requirement that the light meson momenta should be small, and we discuss how such limitations can be circumvented through reasonable ansatz on the form factors. Flavour conserving (e. g. B * → B γ) and flavour changing (e. g. B → K * γ) radiative decays provide another field of applications of effective lagrangians; they are discussed together with their phenomenological implications. Finally we analyze effective lagrangians describing heavy charmonium-like (QQ) mesons and their strong and electromagnetic interactions. The role of approximate heavy quark symmetries for this case and the phenomenological tests of these models are also discussed.

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“…is the momentum of one of the Kπ pairs in the B (s) meson rest frame. The four-body phase space has been derived in the analyses of the K → ππlν decay [108], the semileptonicB → D(D * )πlν decays [109], semileptonic baryonic decays [110,111], and four-body baryonic decays [112]. One can confirm that eq.…”

Section: Helicity Amplitudesmentioning

confidence: 62%

Four-body decays B(s) → (Kπ)S/P(Kπ)S/P in the perturbative QCD approach

Rui

2021

J. High Energ. Phys.

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We investigate the four-body decays B(s) → (Kπ)S/P(Kπ)S/P in the Kπ-pair invariant mass region around the K*(892) resonance in the perturbative QCD (PQCD) approach, where (Kπ)S/P denotes a S- or P-wave Kπ configuration. The contributions from the P-wave resonance K*(892) and from possible S-wave components are included into the parametrization of the Kπ two-meson distribution amplitudes, which are the non-perturbative inputs in this formalism. We calculate the branching ratio for each resonance and observe sizable S-wave contributions to the Bs modes, well consistent with recently available LHCb data. We also deduce the polarization fractions for the $$ {K}^{\ast }{\overline{K}}^{\ast } $$ K ∗ K ¯ ∗ final states, and compare our predictions to those in previous PQCD analyses of the corresponding two-body B → $$ {K}^{\ast }{\overline{K}}^{\ast } $$ K ∗ K ¯ ∗ decays. The polarization puzzle associated with the two U-spin related channels B0 → $$ {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ K ∗ 0 K ¯ ∗ 0 and $$ {B}_s^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ B s 0 → K ∗ 0 K ¯ ∗ 0 still exists. In addition to direct CP asymmetries, triple-product asymmetries and S-wave induced direct CP asymmetries originating from the interference among various helicity amplitudes, are presented. It is shown that true triple-product asymmetries are rather small, while direct CP asymmetries and S-wave-induced direct CP asymmetries are significant in some decays. Our results will be subject to stringent tests with precise data from B factories in the near future.

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Heavy quark and chiral symmetry predictions for semileptonic decaysB¯→D(D*)πℓ

Cited by 24 publications

References 27 publications

An experimentalist’s guide to the semileptonic bottom to charm branching fractions

An experimentalist’s guide to the semileptonic bottom to charm branching fractions

Phenomenology of heavy meson chiral lagrangians

Four-body decays B(s) → (Kπ)S/P(Kπ)S/P in the perturbative QCD approach

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