Valid QCD sum rules for vector mesons in nuclear matter

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.3344· OSTI ID:132956

Jin, X; Leinweber, D B ^[1]

---

1. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)

QCD sum rules for vector mesons ({rho}, {omega}, {phi}) in nuclear matter are reexamined with an emphasis on the reliability of various sum rules. Monitoring the continuum contribution and the convergence of the operator product expansion plays a crucial role in determining the validity of a sum rule. The uncertainties arising from less than precise knowledge of the condensate values and other input parameters are analyzed via a Monte Carlo error analysis. Our analysis leaves no doubt that vector-meson masses decrease with increasing density. This resolves the current debate over the behavior of the vector-meson masses and the sum rules to be used in extracting vector meson properties in nuclear matter. We find a ratio of {rho}-meson masses of {ital m}{sub {rho}}{sup *}/{ital m}{sub {rho}}=0.78{plus_minus}0.08 at nuclear matter saturation density.

• OSTI ID: 132956
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 52; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ERRORS
MASS
MONTE CARLO METHOD
NUCLEAR MATTER
OPERATOR PRODUCT EXPANSION
QUANTUM CHROMODYNAMICS
SUM RULES
VECTOR MESONS