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Constraints on the Kl3 form factors from analyticity and unitarity

Abbas, Gauhar and Ananthanarayan, B and Caprini, Irinel and Imsong, Sentitemsu I (2012) Constraints on the Kl3 form factors from analyticity and unitarity. In: PRAMANA-JOURNAL OF PHYSICS, 79 (4, SI). pp. 891-894.

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Official URL: http://dx.doi.org/10.1007/s12043-012-0399-x

Abstract

The K pi form factors are investigated at low energies by the method of unitarity bounds adapted so as to include information on the phase and modulus along the elastic region of the unitarity cut. Using as input the values of the form factors at t = 0, and at the Callan-Treiman point in the scalar case, stringent constraints are obtained on the slope and curvature parameters of the Taylor expansion at the origin.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to INDIAN ACAD SCIENCES, Bangalore
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Depositing User: Francis Jayakanth
Date Deposited: 21 Dec 2012 03:49
Last Modified: 21 Dec 2012 03:49
URI: http://eprints.iisc.ac.in/id/eprint/45497

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