New constraints on the pion EM form factor using Pi `(-Q(2))

Abbas, Gauhar and Ananthanarayan, B and Ramanan, S (2009) New constraints on the pion EM form factor using Pi `(-Q(2)). In: European Physical Journal A, 41 (1). pp. 93-100.

PDF pdf.pdf - Published Version Restricted to Registered users only Download (894kB) | Request a copy

Abstract

We study the constraints arising on the expansion parameters c and d of the pion electromagnetic form factor from the inclusion of pure spacelike data and the phase of timelike data along with one spacelike datum, using as input the first derivative of the QCD polarization amplitude Pi'(-Q(2)). These constraints when combined with other analyses, provide a valuable check on a determination of c due to Guo et al. and on our previous work where pionic contribution to the (g - 2) of the muon was used as the input. This work further illustrates the power of analyticity techniques in form factor analysis.

Item Type:	Journal Article
Publication:	European Physical Journal A
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	31 Dec 2009 09:18
Last Modified:	22 Feb 2012 06:33
URI:	http://eprints.iisc.ac.in/id/eprint/21480

Actions (login required)

View Item