Light Vector Mesons in the Nuclear Medium

Authors

M. H. Wood
M. J. Amaryan, Old Dominion UniversityFollow
H. Bagdasaryan, Old Dominion University
S. L. Careccia, Old Dominion University
K. V. Dharmawardane, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
G. Gavalian, Old Dominion University
N. Guler, Old Dominion University
C. E. Hyde-Wright, Old Dominion UniversityFollow
H. G. Juengst, Old Dominion University
N. Kalantarians, Old Dominion University
A. Klein, Old Dominion UniversityFollow
K. V. Klimenko, Old Dominion University
S. E. Kuhn, Old Dominion UniversityFollow
J. Lachniet, Old Dominion University
M. R. Niroula, Old Dominion University
R. A. Niyazov, Old Dominion University
S. Tkachenko, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
J. Zhang, Old Dominion University
CLAS Collaboration

Document Type

Article

Publication Date

2008

DOI

10.1103/PhysRevC.78.015201

Publication Title

Physical Review C

Volume

78

Issue

1

Pages

015201 (15 pages)

Abstract

The light vector mesons (ρ,ω, and ϕ) were produced in deuterium, carbon, titanium, and iron targets in a search for possible in-medium modifications to the properties of the ρ meson at normal nuclear densities and zero temperature. The vector mesons were detected with the CEBAF Large Acceptance Spectrometer (CLAS) via their decays to e+e−. The rare leptonic decay was chosen to reduce final-state interactions. A combinatorial background was subtracted from the invariant mass spectra using a well-established event-mixing technique. The ρ-meson mass spectrum was extracted after the ω and ϕ signals were removed in a nearly model-independent way. Comparisons were made between the ρmass spectra from the heavy targets (A>2) with the mass spectrum extracted from the deuterium target. With respect to the ρ-meson mass, we obtain a small shift compatible with zero. Also, we measure widths consistent with standard nuclear many-body effects such as collisional broadening and Fermi motion.

Comments

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©2008 The American Physical Society

Original Publication Citation

Wood, M. H., Nasseripour, R., Weygand, D. P., Djalali, C., Tur, C., Mosel, U., . . . Collaboration, C. (2008). Light vector mesons in the nuclear medium. Physical Review C, 78(1), 015201. doi:10.1103/PhysRevC.78.015201

ORCID

0000-0002-5648-0256 (Amayan), 0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)

Repository Citation

Wood, M. H.; Amaryan, M. J.; Bagdasaryan, H.; Careccia, S. L.; Dharmawardane, K. V.; Dodge, G. E.; Gavalian, G.; Guler, N.; Hyde-Wright, C. E.; Juengst, H. G.; Kalantarians, N.; Klein, A.; Klimenko, K. V.; Kuhn, S. E.; Lachniet, J.; Niroula, M. R.; Niyazov, R. A.; Tkachenko, S.; Weinstein, L. B.; Zhang, J.; and CLAS Collaboration, "Light Vector Mesons in the Nuclear Medium" (2008). Physics Faculty Publications. 338.
https://digitalcommons.odu.edu/physics_fac_pubs/338