Bounds on the spacelike pion electromagnetic form factor from analyticity and unitarity

Sentitemsu Imsong, I and Ananthanarayan, B and Caprini, Irinel (2012) Bounds on the spacelike pion electromagnetic form factor from analyticity and unitarity. In: Sixth International Conference on Quarks and Nuclear Physics, April 16-20, 2012, Palaiseau, France.

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Abstract

We use the recently measured accurate BaBaR data on the modulus of the pion electromagnetic form factor,Fπ(t), up to an energy of 3 GeV, the I=1P-wave phase of the π π scattering ampli-tude up to the ω−π threshold, the pion charge radius known from Chiral Perturbation Theory,and the recently measured JLAB value of Fπ in the spacelike region at t=−2.45GeV2 as inputs in a formalism that leads to bounds on Fπ in the intermediate spacelike region. We compare our constraints with experimental data and with perturbative QCD along with the results of several theoretical models for the non-perturbative contribution s proposed in the literature.

Item Type:	Conference Paper
Publisher:	Proceedings of Science
Additional Information:	Copyright of this article belongs to Proceedings of Science.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	06 Feb 2014 07:45
Last Modified:	06 Feb 2014 07:45
URI:	http://eprints.iisc.ac.in/id/eprint/48343

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