Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory
Abstract
The pion form factor is calculated in the framework of the charge-conjugation invariant covariant spectator theory. This formalism is established in Minkowski space, and the calculation is set up in momentum space. In a previous calculation we included only the leading pole coming from the spectator quark (referred to as the relativistic impulse approximation). In this study we also include the contributions from the poles of the quark which interacts with the photon and average over all poles in both the upper and lower half-planes in order to preserve charge conjugation invariance (referred to as the C-symmetric complete impulse approximation). We find that for small pion mass these contributions are significant at all values of the four-momentum transfer Q2 but, surprisingly, do not alter the shape obtained from the spectator poles alone.
- Authors:
-
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Univ. de Lisboa, Lisboa (Portugal)
- Univ. de Evora, Evora (Portugal)
- 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:
- 1224196
- Alternate Identifier(s):
- OSTI ID: 1224364
- Report Number(s):
- JLAB-THY-15-2125; DOE/OR/23177-3517
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US1600894
- Grant/Contract Number:
- UID/FIS/00777/2013; CERN/FP/123580/2011; SFRH/BPD/100578/2014; AC05-06OR23177; AC05- 06OR23177
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Biernat, Elmar P., Gross, Franz, Peña, M. T., and Stadler, Alfred. Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory. United States: N. p., 2015.
Web. doi:10.1103/PhysRevD.92.076011.
Biernat, Elmar P., Gross, Franz, Peña, M. T., & Stadler, Alfred. Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory. United States. https://doi.org/10.1103/PhysRevD.92.076011
Biernat, Elmar P., Gross, Franz, Peña, M. T., and Stadler, Alfred. 2015.
"Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory". United States. https://doi.org/10.1103/PhysRevD.92.076011. https://www.osti.gov/servlets/purl/1224196.
@article{osti_1224196,
title = {Charge-conjugation symmetric complete impulse approximation for the pion electromagnetic form factor in the covariant spectator theory},
author = {Biernat, Elmar P. and Gross, Franz and Peña, M. T. and Stadler, Alfred},
abstractNote = {The pion form factor is calculated in the framework of the charge-conjugation invariant covariant spectator theory. This formalism is established in Minkowski space, and the calculation is set up in momentum space. In a previous calculation we included only the leading pole coming from the spectator quark (referred to as the relativistic impulse approximation). In this study we also include the contributions from the poles of the quark which interacts with the photon and average over all poles in both the upper and lower half-planes in order to preserve charge conjugation invariance (referred to as the C-symmetric complete impulse approximation). We find that for small pion mass these contributions are significant at all values of the four-momentum transfer Q2 but, surprisingly, do not alter the shape obtained from the spectator poles alone.},
doi = {10.1103/PhysRevD.92.076011},
url = {https://www.osti.gov/biblio/1224196},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 7,
volume = 92,
place = {United States},
year = {Mon Oct 26 00:00:00 EDT 2015},
month = {Mon Oct 26 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
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