Published April 15, 2009 | Version v1
Journal article Metadata-only

Role of the N*(1440) resonance in the pp→pnπ+ reaction

Creators

  • 1. Theoretical Physics Center for Science Facilities, CAS, Beijing 100049 (China)
  • 2. Graduate University of Chinese Academy of Sciences, Beijing 100049 (China)
  • 3. Institute of Modern Physics, CAS, Lanzhou 730000 (China)
  • 4. Institute of High Energy Physics, CAS, Beijing 100049 (China)

Description

New measurement by CELSIUS-WASA Collaboration on the pp→pnπ+ reaction reveals clear evidence for the presence of the Roper resonance N*(1440) which has been ignored in previous theoretical calculations. In this article, based on an effective Lagrangian approach and available knowledge on the Roper resonance, we investigate the role of the Roper resonance for the pp→pnπ+ reaction. It is found that the contribution from the Roper resonance N*(1440) becomes significant for kinetic energy above 1.1 GeV, consistent with the new experimental observation. The t-channel σ-meson exchange is dominant for the production of the Roper resonance.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.nuclphysa.2009.02.010

Additional details

Identifiers

DOI
10.1016/j.nuclphysa.2009.02.010;
arXiv
arXiv:0808.3257v3;
PII
S0375-9474(09)00153-5;

Publishing Information

Journal Title
Nuclear Physics. A
Journal Volume
821
Journal Issue
1-4
Journal Page Range
p. 220-234
ISSN
0375-9474
CODEN
NUPABL

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41061570
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BOSON-EXCHANGE MODELS; GEV RANGE 01-10; KINETIC ENERGY; LAGRANGIAN FUNCTION; N-1440 BARYONS; PARTICLE PRODUCTION; PIONS PLUS; PROTON-NEUTRON INTERACTIONS; PROTON-PROTON INTERACTIONS; RESONANCE; T CHANNEL
Descriptors DEC
BARYON-BARYON INTERACTIONS; BARYONS; BOSONS; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; FUNCTIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; MATHEMATICAL MODELS; MESONS; N BARYONS; N*BARYONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE MODELS; PERIPHERAL MODELS; PIONS; PROTON-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS

Optional Information

Copyright
Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.