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K+ -> π+π0 decays at next-to-leading order in the chiral expansion on finite volumes

K+ -> π+π0 decays at next-to-leading order in the chiral expansion on finite volumes
K+ -> π+π0 decays at next-to-leading order in the chiral expansion on finite volumes
We present the ingredients for determining K+ -> π+π0 matrix elements via the combination of lattice QCD and chiral perturbation theory (χPT). By simulating these matrix elements at unphysical kinematics, it is possible to determine all the low-energy constants (LECs) for constructing the physical K+ -> π+π0 amplitudes at next-to-leading order (NLO) in the chiral expansion. In this work, the one-loop chiral corrections are calculated for arbitrary meson four-momenta, in both χPT and quenched χPT (gχPT), and the finite-volume effects are studied.
0920-5632
383-385
Lin, C.-J. D.
01ee4db6-7088-4776-ad63-73fbc8c60345
Martinelli, G.
3949da7a-7efe-4ebd-b1f7-92f1ca150d66
Pallante, E.
beba5f56-f008-4986-8ade-36e466e10db0
Sachrajda, C. T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Villadoro, G.
e031a98e-8777-45c1-920d-05e3bd0e9b20
Lin, C.-J. D.
01ee4db6-7088-4776-ad63-73fbc8c60345
Martinelli, G.
3949da7a-7efe-4ebd-b1f7-92f1ca150d66
Pallante, E.
beba5f56-f008-4986-8ade-36e466e10db0
Sachrajda, C. T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Villadoro, G.
e031a98e-8777-45c1-920d-05e3bd0e9b20

Lin, C.-J. D., Martinelli, G., Pallante, E., Sachrajda, C. T. and Villadoro, G. (2003) K+ -> π+π0 decays at next-to-leading order in the chiral expansion on finite volumes. Nuclear Physics B - Proceedings Supplements, 119, 383-385. (doi:10.1016/S0920-5632(03)01561-5).

Record type: Article

Abstract

We present the ingredients for determining K+ -> π+π0 matrix elements via the combination of lattice QCD and chiral perturbation theory (χPT). By simulating these matrix elements at unphysical kinematics, it is possible to determine all the low-energy constants (LECs) for constructing the physical K+ -> π+π0 amplitudes at next-to-leading order (NLO) in the chiral expansion. In this work, the one-loop chiral corrections are calculated for arbitrary meson four-momenta, in both χPT and quenched χPT (gχPT), and the finite-volume effects are studied.

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More information

Published date: 2003
Additional Information: Proceedings of the XXth International Symposium on Lattice Field Theory

Identifiers

Local EPrints ID: 57422
URI: http://eprints.soton.ac.uk/id/eprint/57422
ISSN: 0920-5632
PURE UUID: 47583052-7b76-41d6-b3a2-96e7698d4800

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Date deposited: 07 Aug 2008
Last modified: 09 Nov 2021 09:53

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Contributors

Author: C.-J. D. Lin
Author: G. Martinelli
Author: E. Pallante
Author: C. T. Sachrajda
Author: G. Villadoro

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