Probing SU(2) symmetry breaking in the nucleon sea
Loading...
External sources
External sources
Date
Authors
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Type
Article
Access right
Acesso restrito
External sources
External sources
Abstract
Investigation of invariant cross-sections for production of K*- and K*0, in the fragmentation region of the proton, in p - p and γ - p reactions, gives a direct and unambiguous probe to the symmetry breaking of the nucleon sea. Based on existing data, we clearly found a large asymmetry of the sea. Our result is in excellent agreement with NA51 measurement, signaling lack of any nuclear effect. The measurement can be carried out in a single experimental set up. The ratio K*-/K*0 is equivalent to ū/d̄, with easy access to the x-dependence of the asymmetry. The observed asymmetry from available experimental data is used to improve the valon-recombination model. © 1997 Elsevier Science B.V.
Description
Keywords
Language
English
Citation
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 401, n. 3-4, p. 207-212, 1997.
