Published June 29, 2006 | Version v1
Journal article Metadata-only

Measurement of the Upsilon production cross section in 920 GeV fixed-target proton-nucleus collisions

Creators

  • 1. Max-Planck-Institut fuer Physik, Werner-Heisenberg-Institut, D-80805 Munich (Germany)
  • 2. Institut fuer Physik, Universitaet Dortmund, D-44221 Dortmund (Germany)
  • 3. Max-Planck-Institut fuer Kernphysik, D-69117 Heidelberg (Germany)

Description

The cross section ratio RJ/ψ=Br(Upsilon ->l+l-). dσ(Upsilon )/dy vertical bary=0/σ(J/ψ) has been measured with the HERA-B spectrometer in fixed-target proton-nucleus collisions at 920 GeV proton beam energy corresponding to a proton-nucleon c.m.s. energy of s=41.6 GeV. The combined results for the decay channels Upsilon ->e+e- and Upsilon ->μ+μ- yield a ratio RJ/ψ=(9.0+/-2.1)x10-6. The corresponding -bar production cross section per nucleon at mid-rapidity (y=0) has been determined to be Br(Upsilon ->l+l-). dσ(Upsilon)/dy vertical bary=0=4.5+/-1.1 pb/nucleon

Additional details

Identifiers

DOI
10.1016/j.physletb.2006.04.042;
arXiv
arXiv:hep-ex/0603015v1;
PII
S0370-2693(06)00517-X;

Publishing Information

Journal Title
Physics Letters. Section B
Journal Volume
638
Journal Issue
1
Journal Page Range
p. 13-21
ISSN
0370-2693
CODEN
PYLBAJ

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38062540
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
CROSS SECTIONS; ELECTRONS; GEV RANGE 100-1000; HERA STORAGE RING; J PSI-3097 MESONS; MUONS MINUS; MUONS PLUS; PARTICLE DECAY; PARTICLE RAPIDITY; POSITRONS; PROTON BEAMS; PROTON-NUCLEON INTERACTIONS; SPECTROMETERS
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARYON-BARYON INTERACTIONS; BEAMS; BOSONS; CHARMONIUM; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; LEPTONS; MATTER; MEASURING INSTRUMENTS; MESONS; MUONS; NUCLEON BEAMS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; QUARKONIUM; STORAGE RINGS; VECTOR MESONS

Optional Information

Copyright
Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.