Published February 5, 2004 | Version v1
Journal article Metadata-only

Measurement of Invariant Mass Spectra of Vector Meson Decaying in Nuclear Matter at KEK-PS

Creators

  • 1. RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
  • 2. KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  • 3. Department of Physics, Kyoto University, Kitashirakawa Sakyo-Ku, Kyoto 606-8502 (Japan)

Description

We measured invariant mass spectra of e+e- pairs produced in 12-GeV p + A interaction to investigate in-medium mass modification of vector mesons. We observed the excess over the known hadronic sources below the ω meson mass peak. The obtained ρ/ω ratio and velocity dependence of excess/ω ratio imply that this excess mainly results from ρ meson whose mass was modified in nuclear matter

Additional details

Identifiers

DOI
10.1063/1.1664212;

Publishing Information

Journal Title
AIP Conference Proceedings
Journal Volume
698
Journal Issue
1
Journal Page Range
p. 138-141
ISSN
0094-243X
CODEN
APCPCS

Conference

Title
8. conference on intersections of particle and nuclear physics
Acronym
CIPANP2003
Dates
19-24 May 2003
Place
New York, NY (United States)

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36071317
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CARBON 12 TARGET; ELECTRON PAIRS; GEV RANGE; JAPANESE ORGANIZATIONS; MASS SPECTRA; NUCLEAR MATTER; OMEGA-782 MESONS; PAIR PRODUCTION; POSITRONS; PROTON REACTIONS; PROTON-NUCLEON INTERACTIONS; QUANTUM CHROMODYNAMICS; RHO-770 MESONS; SUM RULES
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYON REACTIONS; BARYON-BARYON INTERACTIONS; BOSONS; CHARGED-PARTICLE REACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; EQUATIONS; FERMIONS; FIELD THEORIES; HADRON REACTIONS; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; LEPTONS; MATTER; MESONS; NATIONAL ORGANIZATIONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; QUANTUM FIELD THEORY; SPECTRA; TARGETS; VECTOR MESONS

Optional Information

Notes
(c) 2004 American Institute of Physics