Lattice calculation of nonleptonic charm decays
Abstract
The decays of charmed mesons into two body nonleptonic final states are investigated. Weak interaction amplitudes of interest in these decays are extracted from lattice four-point correlation functions using a effective weak Hamiltonian including effects to order G f in the weak interactions yet containing effects to all orders in the strong interactions. The lattice calculation allows a quantitative examination of non-spectator processes in charm decays helping to elucidate the role of effects such as color coherence, final state interactions and the importance of the so called weak annihilation process. For D → Kπ, we find that the non-spectator weak annihilation diagram is not small, and we interpret this as evidence for large final state interactions. Moreover, there is indications of a resonance in the isospin 1/2 channel to which the weak annihilation process contributes exclusively. Findings from the lattice calculation are compared to results from the continuum vacuum saturation approximation and amplitudes are examined within the framework of the 1/N expansion. Factorization and the vacuum saturation approximation are tested for lattice amplitudes by comparing amplitudes extracted from lattice four-point functions with the same amplitude extracted from products of two-point and three-point lattice correlation functions arising out of factorizationmore »
- Authors:
-
- Univ. of California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10109470
- Report Number(s):
- BNL-46890
ON: DE92005026
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Thesis/Dissertation
- Resource Relation:
- Other Information: DN: Thesis submitted to the Univ. of California, Los Angeles; TH: Thesis (Ph.D); PBD: Nov 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; D MESONS; WEAK HADRONIC DECAY; QUARKS; CORRELATION FUNCTIONS; HAMILTONIANS; THEORETICAL DATA; MATRIX ELEMENTS; 662350; DECAYS OF MESONS
Citation Formats
Simone, James Nicholas. Lattice calculation of nonleptonic charm decays. United States: N. p., 1991.
Web. doi:10.2172/10109470.
Simone, James Nicholas. Lattice calculation of nonleptonic charm decays. United States. doi:10.2172/10109470.
Simone, James Nicholas. Fri .
"Lattice calculation of nonleptonic charm decays". United States.
doi:10.2172/10109470. https://www.osti.gov/servlets/purl/10109470.
@article{osti_10109470,
title = {Lattice calculation of nonleptonic charm decays},
author = {Simone, James Nicholas},
abstractNote = {The decays of charmed mesons into two body nonleptonic final states are investigated. Weak interaction amplitudes of interest in these decays are extracted from lattice four-point correlation functions using a effective weak Hamiltonian including effects to order Gf in the weak interactions yet containing effects to all orders in the strong interactions. The lattice calculation allows a quantitative examination of non-spectator processes in charm decays helping to elucidate the role of effects such as color coherence, final state interactions and the importance of the so called weak annihilation process. For D → Kπ, we find that the non-spectator weak annihilation diagram is not small, and we interpret this as evidence for large final state interactions. Moreover, there is indications of a resonance in the isospin 1/2 channel to which the weak annihilation process contributes exclusively. Findings from the lattice calculation are compared to results from the continuum vacuum saturation approximation and amplitudes are examined within the framework of the 1/N expansion. Factorization and the vacuum saturation approximation are tested for lattice amplitudes by comparing amplitudes extracted from lattice four-point functions with the same amplitude extracted from products of two-point and three-point lattice correlation functions arising out of factorization and vacuum saturation.},
doi = {10.2172/10109470},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Nov 01 00:00:00 EST 1991},
month = {Fri Nov 01 00:00:00 EST 1991}
}
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