Evidence for Narrow Baryon Resonances in Inelastic {ital pp} Scattering

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.601· OSTI ID:527048

Tatischeff, B; Willis, N; Comets, M P; Courtat, P; Gacougnolle, R; Le Bornec, Y; Loireleux, E; Reide, F ^[1]; Yonnet, J; Boivin, M ^[2]

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1. Institut de Physique Nucleaire, CNRS/IN2P3, F-91406 Orsay Cedex (France)
2. Laboratoire National Saturne, CEA/DSM CNRS/IN2P3, F-91191 Gif-sur-Yvette Cedex (France)

The reaction pp{r_arrow}p{pi}{sup +}N has been studied at three energies (T{sub p}=1520 , 1805, and 2100MeV) and six angles from 0{degree} up to 17{degree} (laboratory). Several narrow states have been observed in missing mass spectra at 1004, 1044, and 1094MeV. Their widths are typically 1 order of magnitude smaller than the widths of N{sup {asterisk}} or {Delta} . Possible biases are discussed. These masses are in good agreement with those calculated within a simple phenomenological mass formula based on color magnetic interaction between two colored quark clusters. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 527048
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYONS
COLOR MODEL
GLUEBALLS
INELASTIC SCATTERING
MASS FORMULAE
MISSING-MASS SPECTRA
PROTON-PROTON INTERACTIONS
QUARKS
RESONANCE
WIDTH