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Timelike-helicity $B\to \pi\pi$ form factor from light-cone sum rules with dipion distribution amplitudes

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arxiv 1709.00173 v1 pith:TCYPWXBX submitted 2017-09-01 hep-ph

Shan Cheng , Alexander Khodjamirian , Javier Virto This is my paper · ORCID
classification hep-ph
keywords formdipionfactoramplitudesdistributionfactorslight-conerules
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We complete the set of QCD light-cone sum rules for $B\to \pi\pi$ transition form factors, deriving a new sum rule for the timelike-helicity form factor $F_t$ in terms of dipion distribution amplitudes. This sum rule, in the leading twist-2 approximation, is directly related to the pion vector form factor. Employing a relation between $F_t$ and other $B\to \pi\pi$ form factors we obtain also the longitudinal-helicity form factor $F_0$. In this way, all four (axial-)vector $B\to \pi\pi$ form factors are predicted from light-cone sum rules with dipion distribution amplitudes. These results are valid for small dipion masses with large momentum.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. $B \to \rho \ell \bar{\nu}$ resonance form factors from $B \to \pi\pi \ell \bar{\nu}$ in lattice QCD

    hep-lat 2025-01 accept novelty 7.0 of 10

    First lattice QCD calculation of B to rho semileptonic form factors with the rho treated as a resonant pi-pi state, using the Lellouch-Luscher formalism.

  2. Precision calculations of $B\to K^*$ form factors from SCET sum rules beyond leading-power contributions

    hep-ph 2024-12 conditional novelty 6.0 of 10

    New subleading-power corrections to B to K* form factors from SCET sum rules yield SM branching fractions BR(Bbar0 to Kbar*0 nu nubar)=8.09(96)e-6 and F_L=0.44(4).

  3. Unitarity bounds and form-factor predictions for $B$-meson decays

    hep-ph 2026-05 unverdicted novelty 5.0 of 10

    Reviews unitarity bounds for B-meson form factors, shows standard methods apply rigorously only to B→π, develops GG parametrization for general cases, and delivers combined-analysis predictions with public supplementa...

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