How to search for pentaquarks in high energy hadronic interactions
- 1. Tel Aviv Univ. (Israel). Dept. of Physics
- 2. Institute for High Energy Physics (IHEP), Protvino (Russian Federation)
- 3. Weizmann Inst. of Science, Rehovoth (Israel). Dept. of Particle Physics
Description
The strange-anticharmed pentaquark is a uud anti cs or udd anti cs five-quark baryon that is expected to be either a narrow resonance, or possibly even stable against strong and electromagnetic decay. We describe this hyperon here, its structure, binding energy and lifetime, resonance width, production mechanisms, production cross sections, and decay modes. We describe techniques to reduce backgrounds in search experiments and to optimize the conditions for pentaquark observation. Possibilities for enhancing the signal over background in Pentaquark searches are investigated by examining predictions for detailed momentum and angular distributions in multiparticle final states. We consider a loosely bound Ds-N molecule and also a strongly-bound five-quark system. Fermilab E791 data, currently being analyzed, may have marginal statistics for showing definitive signals. Future experiments in the spirit of the recent CHARM2000 workshop, such as FNAL E781 and CERN COMPASS with 106-107 reconstructed charmed baryon events, should have sensitivity to determine whether or not the pentaquark exists. (orig.)
Additional details
Publishing Information
- Journal Title
- Zeitschrift fuer Physik. A, Hadrons and Nuclei
- Journal Volume
- 356
- Journal Issue
- 2
- Journal Page Range
- p. 207-218.
- ISSN
- 0939-7922
- CODEN
- ZPAHEX
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 28006519
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BINDING ENERGY; BOUND STATE; CHARMED BARYONS; DIFFERENTIAL CROSS SECTIONS; EFFECTIVE MASS; EXOTIC RESONANCES; FLAVOR MODEL; GEV RANGE 100-1000; HADRONIC PARTICLE DECAY; HYPERONS; INCLUSIVE INTERACTIONS; INTEGRAL CROSS SECTIONS; LIFETIME; MANY-BODY PROBLEM; MASS SPECTRA; PAIR PRODUCTION; PARTICLE STRUCTURE; PARTICLE WIDTHS; PION MINUS-PROTON INTERACTIONS; PIONS MINUS; PIONS PLUS; THEORETICAL DATA
- Descriptors DEC
- BARYONS; BOSONS; CHARM PARTICLES; COMPOSITE MODELS; CROSS SECTIONS; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INFORMATION; INTERACTIONS; MASS; MATHEMATICAL MODELS; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PION-NUCLEON INTERACTIONS; PION-PROTON INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; QUARK MODEL; RESONANCE PARTICLES; SPECTRA; STRANGE PARTICLES