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).
jou_phy_conf_ser_374_1_2012.pdf - Published Version
Restricted to Registered users only
Download (585Kb) | Request a copy
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(Î± 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|
Actions (login required)