Light Vector Mesons in the Nuclear Medium

M. H. Wood; Angela Biselli

doi:10.1103/PhysRevC.78.015201

Light Vector Mesons in the Nuclear Medium

M. H. Wood, Angela Biselli

Fairfield University

Research output: Contribution to journal › Article › peer-review

Abstract

<p> 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 ρ mass 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.</p>

Original language	American English
Journal	Physical Review C
Volume	78
DOIs	https://doi.org/10.1103/PhysRevC.78.015201
State	Published - Jan 1 2008

Disciplines

Physical Sciences and Mathematics
Physics

Access to Document

10.1103/PhysRevC.78.015201License: CC BY

Light Vector Mesons in the Nuclear MediumFinal published version, 825 KBLicense: CC BY

Cite this

@article{8fd7cc5a87c441f1a23da12648af6df0,

title = "Light Vector Mesons in the Nuclear Medium",

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 \ρ mass 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.",

author = "Wood, \{M. H.\} and Angela Biselli",

year = "2008",

month = jan,

day = "1",

doi = "10.1103/PhysRevC.78.015201",

language = "American English",

volume = "78",

journal = "Physical Review C",

}

TY - JOUR

T1 - Light Vector Mesons in the Nuclear Medium

AU - Wood, M. H.

AU - Biselli, Angela

PY - 2008/1/1

Y1 - 2008/1/1

N2 - 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 ρ mass 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.

AB - 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 ρ mass 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.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/60

U2 - 10.1103/PhysRevC.78.015201

DO - 10.1103/PhysRevC.78.015201

M3 - Article

VL - 78

JO - Physical Review C

JF - Physical Review C

ER -

Light Vector Mesons in the Nuclear Medium

Abstract

Disciplines

Access to Document

Other files and links

Cite this