期刊
NUCLEAR PHYSICS B
卷 924, 期 -, 页码 477-507出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2017.09.014
关键词
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资金
- U.S. National Science Foundation [PHY-1613449]
- Extreme Science and Engineering Discovery Environment (XSEDE) [TG-MCA07S017]
- National Science Foundation [ACI-1548562]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1613449] Funding Source: National Science Foundation
An implementation of estimating the two-to-two K-matrix from finite-volume energies based on the Luscher formalism and involving a Hermitian matrix known as the box matrix is described. The method includes higher partial waves and multiple decay channels. Two fitting procedures for estimating the K-matrix parameters, which properly incorporate all statistical covariances, are discussed. Formulas and software for handling total spins up to S= 2 and orbital angular momenta up to L = 6 are obtained for total momenta in several directions. First tests involving rho-meson decay to two pions include the L = 3 and L = 5 partial waves, and the contributions from these higher waves are found to be negligible in the elastic energy range. (C) 2017 The Authors. Published by Elsevier B.V.
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