Determination of Nucleon Form factors from Baryonic B Decays

Abstract

It is the first time that the study of three-body baryonic B decays offers an independent determination of the nucleon form factors for the time-like four momentum transfer $(t>0)$ region, such as $G_M^{p,n}(t)$ of vector currents and those of axial ones. Explicitly, from the data of ${\bar{B}}^0\to n\bar{p}{D}^{\ast +}$ and $\Lambda \bar{p}{\pi }^{+}$ we find a constant ratio of $G_M^n(t)/G_M^p(t)=-1.3\pm 0.4$, which supports the FENICE experimental result. The vector and axial-vector form factors of $p\bar{n}$, $p\bar{p}$ and $n\bar{n}$ pairs due to weak currents are also presented, which can be tested in future experiments.

arXiv comment10 pages, 3 figures, final version to be published in PRD

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Cited by in corpus (9)

• Unexpected features of e+e-->ppbar and e+e-->lambda-lambdabar cross sections near threshold
• Charmful Three-body Baryonic B decays
• Violation of PCAC and two-body baryonic $B$ and $D_s$ decays
• Direct CP and T Violation in Baryonic B Decays
• Study of $\bar{B}\to \Lambda \bar{p}\rho (\varphi )$ and $\bar{B}\to \Lambda \bar{\Lambda }{\bar{K}}^{\ast }$
• Charmful baryonic B\to {\bf B\bar B'}M_c decays
• Semileptonic $B-\to p\bar{p}\ell -{\bar{\nu }}_{\ell }$ decays
• Angular asymmetries in $B\to \Lambda \bar{p}M$ decays
• Exploring the simplest purely baryonic decay processes