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Title: Relativistic, model-independent, multichannel 22 transition amplitudes in a finite volume

Abstract

We derive formalism for determining 2 + J → 2 infinite-volume transition amplitudes from finite-volume matrix elements. Specifically, we present a relativistic, model-independent relation between finite-volume matrix elements of external currents and the physically observable infinite-volume matrix elements involving two-particle asymptotic states. The result presented holds for states composed of two scalar bosons. These can be identical or non-identical and, in the latter case, can be either degenerate or non-degenerate. We further accommodate any number of strongly-coupled two-scalar channels. This formalism will, for example, allow future lattice QCD calculations of the $$\rho$$-meson form factor, in which the unstable nature of the $$\rho$$ is rigorously accommodated. In conclusion, we also discuss how this work will impact future extractions of nuclear parity and hadronic long-range matrix elements from lattice QCD.

Authors:
 [1];  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Johannes Gutenberg-Univ. Mainz, Mainz (Germany)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1262312
Alternate Identifier(s):
OSTI ID: 1262447
Report Number(s):
JLAB-THY-15-2140; DOE/OR/23177-3556; arXiv:1509.08507
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; finite volume

Citation Formats

Briceno, Raul A., and Hansen, Maxwell T. Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.013008.
Briceno, Raul A., & Hansen, Maxwell T. Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume. United States. https://doi.org/10.1103/PhysRevD.94.013008
Briceno, Raul A., and Hansen, Maxwell T. Wed . "Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume". United States. https://doi.org/10.1103/PhysRevD.94.013008. https://www.osti.gov/servlets/purl/1262312.
@article{osti_1262312,
title = {Relativistic, model-independent, multichannel 2→2 transition amplitudes in a finite volume},
author = {Briceno, Raul A. and Hansen, Maxwell T.},
abstractNote = {We derive formalism for determining 2 + J → 2 infinite-volume transition amplitudes from finite-volume matrix elements. Specifically, we present a relativistic, model-independent relation between finite-volume matrix elements of external currents and the physically observable infinite-volume matrix elements involving two-particle asymptotic states. The result presented holds for states composed of two scalar bosons. These can be identical or non-identical and, in the latter case, can be either degenerate or non-degenerate. We further accommodate any number of strongly-coupled two-scalar channels. This formalism will, for example, allow future lattice QCD calculations of the $\rho$-meson form factor, in which the unstable nature of the $\rho$ is rigorously accommodated. In conclusion, we also discuss how this work will impact future extractions of nuclear parity and hadronic long-range matrix elements from lattice QCD.},
doi = {10.1103/PhysRevD.94.013008},
journal = {Physical Review D},
number = 1,
volume = 94,
place = {United States},
year = {Wed Jul 13 00:00:00 EDT 2016},
month = {Wed Jul 13 00:00:00 EDT 2016}
}

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Cited by: 55 works
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