QCD light-cone sum rules for B to dipion transition form factors
2016-05-13
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QCD light-cone sum rules for B to dipion transition form factors
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2016-05-13
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The form factors of the semileptonic $B\to \pi\pi\ell\bar\nu$ decay are calculated from QCD light-cone sum rules, employing as a nonperturbative input the distribution amplitudes of dipion states. In the leading twist-2 approximation, we predict all $\bar{B}^0\to \pi^+\pi^0$ form factors in the kinematic region, where the hadronic dipion state has a small invariant mass and simultaneously a large recoil.
The sum rule results reveal a suppression of the higher partial waves in the form factors and indicate that the lowest $P$-wave contribution is not saturated by the $\rho$-meson term.
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Khodjamirian, Alexander. (2016). QCD light-cone sum rules for B to dipion transition form factors. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/180374.
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