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The Dπ form factors from analyticity and unitarity

Ananthanarayan, B and Caprini, I and Imsong, Sentitemsu (2012) The Dπ form factors from analyticity and unitarity. In: Journal of Physics: Conference Series, 374 (1).

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Official URL: http://dx.doi.org/10.1088/1742-6596/374/1/012013

Abstract

We study the shape parameters of the Dπ scalar and vector form factors using as input dispersion relations and unitarity for the moments of suitable heavy-light correlators evaluated with Operator Product Expansions, including O(α 2 s) terms in perturbative QCD. For the scalar form factor, a low energy theorem and phase information on the unitarity cut are implemented to further constrain the shape parameters. We finally determine points on the real axis and isolate regions in the complex energy plane where zeros of the form factors are excluded.

Item Type: Journal Article
Additional Information: Copyright for theis article belongs to IOP
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 12 Sep 2012 08:31
Last Modified: 12 Sep 2012 08:32
URI: http://eprints.iisc.ernet.in/id/eprint/45041

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