Published October 2015 | Version v1
Journal article Metadata-only

Role of Λ(1670) in the γp → K+ ηΛ reaction near threshold

Creators

  • 1. Hunan normal University, Department of Physics, Hunan (China)
  • 2. Zhengzhou University, Department of Physics, Henan (China)
  • 3. Chinese Academy of Sciences, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Beijing (China)
  • 4. Institute of Modern Physics of CAS and Lanzhou University, Research Center for Hadron and CSR Physics, Lanzhou (China)
  • 5. Chinese Academy of Sciences, Institute of Modern Physics, Lanzhou (China)

Description

The role of the Λ(1670) resonance in the γp → K+ ηΛ reaction near threshold is studied within an effective Lagrangian approach. We perform a calculation for the total and differential cross section of the γp → K+ ηΛ reaction by including the contributions from the Λ(1670) intermediate state decaying into ηΛ dominated by K- and K*- mesons exchanges, the nucleon pole and N*(1535) resonance decaying into K+ Λ dominated by exchanges of ω and K- mesons. Besides, the non-resonance process and contact terms to keep the total scattering amplitude gauge invariant are also considered. With our model parameters, the total cross section of this reaction is of the order of 1 nanobarn at photon beam energy Eγ ∝ 2.5 GeV. It is expected that our model predictions could be tested by future experiments. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epja/i2015-15130-0

Additional details

Identifiers

DOI
10.1140/epja/i2015-15130-0;

Publishing Information

Journal Title
European Physical Journal. A
Journal Volume
51
Journal Issue
10
Journal Page Range
p. 1-7
ISSN
1434-6001

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
47040539
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANGULAR DISTRIBUTION; EFFECTIVE MASS; ETA MESONS; EXCITATION FUNCTIONS; GAUGE INVARIANCE; GEV RANGE 01-10; HADRONIC PARTICLE DECAY; INTEGRAL CROSS SECTIONS; KAONS PLUS; LAGRANGIAN FIELD THEORY; LAMBDA PARTICLES; LAMBDA-1670 BARYONS; MASS SPECTRA; N-1535 BARYONS; OBE MODEL; PHOTON-PROTON INTERACTIONS; PHOTOPRODUCTION; SCATTERING AMPLITUDES; THEORETICAL DATA
Descriptors DEC
AMPLITUDES; BARYONS; BASIC INTERACTIONS; BOSON-EXCHANGE MODELS; BOSONS; CROSS SECTIONS; DATA; DECAY; DIFFERENTIAL CROSS SECTIONS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; FUNCTIONS; GEV RANGE; HADRONS; HYPERONS; INFORMATION; INTERACTIONS; INVARIANCE PRINCIPLES; KAONS; LAMBDA BARYONS; MASS; MATHEMATICAL MODELS; MESONS; N BARYONS; N*BARYONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PERIPHERAL MODELS; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SPECTRA; STRANGE MESONS; STRANGE PARTICLES