Implications of recentmeasurements
- 2 May 2002
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 65 (9)
- https://doi.org/10.1103/physrevd.65.094012
Abstract
The recent measurements of the color-suppressed modes $\bar B^0\to D^{(*)0}\pi^0$ imply non-vanishing relative final-state interaction (FSI) phases among various $\bar B\to D\pi$ decay amplitudes. Depending on whether or not FSIs are implemented in the topological quark-diagram amplitudes, two solutions for the parameters $a_1$ and $a_2$ are extracted from data using various form-factor models. It is found that $a_2$ is not universal: $|a_2(D\pi)|= 0.40-0.55$ and $|a_2(D^*\pi)|= 0.25-0.35$ with a relative phase of order $(50-55)^\circ$ between $a_1$ and $a_2$. If FSIs are not included in quark-diagram amplitudes from the outset, $a_2^{eff}/a_1^{eff}$ and $a_2^{eff}$ will become smaller. The large value of $|a_2(D\pi)|$ compared to $|a_2^{eff}(D\pi)|$ or naive expectation implies the importance of long-distance FSI contributions to color-suppressed internal $W$-emission via final-state rescatterings of the color-allowed tree amplitude.
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This publication has 28 references indexed in Scilit:
- Observation ofandPhysical Review Letters, 2002
- Observation of the Color-Suppressed DecayPhysical Review Letters, 2002
- Weak form factors for heavy meson decays: An updatePhysical Review D, 2000
- Charmless hadronic two-body decays ofandmesonsPhysical Review D, 1999
- Updated analysis ofandin hadronic two-body decays ofBmesonsPhysical Review D, 1999
- Nonfactorizable effects in spectator and penguin amplitudes of hadronic charmlessdecaysPhysical Review D, 1998
- Search for color-suppressedhadronic decay processes at theresonancePhysical Review D, 1998
- Analysis of two-body nonleptonicdecays involving light mesons in the standard modelPhysical Review D, 1998
- Mesonic form factors and the Isgur-Wise function on the light frontPhysical Review D, 1997
- Exclusive semileptonic decays of heavy mesonsThe European Physical Journal C, 1985